/* Base */
:root {
  --text-color: #101018;
  --muted-color: #4a4a5a;
  --primary-color: #842bff;
  --background: #ffffff;
  --border-color: #e5e5f0;
  --surface-color: #ffffff;
  --surface-light: #f8f8fc;
  --shadow-color: rgba(0, 0, 0, 0.1);
}

/* Dark theme variables */
:root[data-theme="dark"] {
  --text-color: #f8f8f8;
  --muted-color: #c4c4d4;
  --primary-color: #b865f7;
  --background: #1a1a24;
  --border-color: #4a4a5a;
  --surface-color: #22222e;
  --surface-light: #2a2a38;
  --shadow-color: rgba(0, 0, 0, 0.2);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: "TildaSans", "Arial", sans-serif;
  font-size: 17px;
  font-weight: 450;
  color: var(--text-color);
  background: var(--background);
  line-height: 1.6;
  overflow-x: hidden;
}

.semi-bold {
  font-weight: 600;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

section[id] {
  scroll-margin-top: 80px;
}

@media (max-width: 640px) {
  section[id] {
    scroll-margin-top: 0;
  }
}

.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 24px;
  }
}

@media (min-width: 1200px) {
  .container {
    padding: 0 32px;
  }
}

.container--fluid {
  max-width: none;
  padding: 0;
}

.container--wide {
  max-width: 100%;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.site-header .button {
  padding: 12px 21px;
}

[data-theme="dark"] .site-header {
  background: rgba(26, 26, 46, 0.85);
  border-bottom: 1px solid rgba(74, 74, 90, 0.3);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
}

.logo__image {
  width: 160px;
  height: auto;
}


[data-theme="dark"] .logo__image {
  filter: brightness(0) invert(1);
}

.logo__mark {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary-color);
  line-height: 1;
  margin-bottom: 2px;
}

.primary-nav {
  display: flex;
  gap: 8px;
  flex-wrap: nowrap;
  margin: 0 auto;
}

.nav__link {
  font-size: 17px;
  font-weight: 600;
  color: var(--muted-color);
  padding: 10px 12px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav__link:hover,
.nav__link:focus {
  color: var(--primary-color);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header__contacts {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-right: 20px;
  align-items: flex-end;
}

.header__contacts .contact-link {
  border: none;
  padding: 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-color);
}

.contact-link {
  color: var(--primary-color);
  border: 1.5px solid var(--primary-color);
  padding: 6px 14px;
  border-radius: 10px;
  font-size: 14px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.contact-link:hover {
  background: var(--primary-color);
  color: #ffffff;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 23px;
  border-radius: 12px;
  border: 2px solid transparent;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.button::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.button:hover::before {
  opacity: 1;
}

.button--primary {
  background: linear-gradient(135deg, var(--primary-color), #a855f7);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(132, 43, 255, 0.3);
}

.button--primary:hover,
.button--primary:focus {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(132, 43, 255, 0.4);
}

.button--primary:active {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(132, 43, 255, 0.35);
}

.button--primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.button--ghost {
  background: #ffffff;
  border: 2px solid #e8e8f2;
  color: var(--text-color);
}

.button--ghost:hover {
  border-color: #c4b5fd;
  background: rgba(132, 43, 255, 0.03);
  transform: translateY(-2px);
}

[data-theme="dark"] .button--ghost {
  background: var(--surface-color);
  border: 2px solid var(--border-color);
  color: var(--text-color);
}

[data-theme="dark"] .button--ghost:hover {
  border-color: #c4b5fd;
  background: rgba(132, 43, 255, 0.08);
}

.button--ghost:active {
  transform: translateY(0);
}

.button--cta {
  padding: 16px 37px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  box-shadow: 0 10px 30px rgba(132, 43, 255, 0.4);
  animation: button-pulse 3s infinite ease-in-out;
  white-space: normal;
  max-width: 100%;
  position: relative;
  overflow: hidden;
}

@keyframes button-pulse {
  0%, 100% {
    box-shadow: 0 10px 30px rgba(132, 43, 255, 0.4);
  }
  50% {
    box-shadow: 0 15px 45px rgba(132, 43, 255, 0.6);
  }
}

/* Shimmer effect */
.button--cta::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    to right,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.3) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: skewX(-25deg);
  animation: button-shimmer 4s infinite linear;
}

@keyframes button-shimmer {
  0% { left: -150%; }
  25%, 100% { left: 250%; }
}

.button--cta:hover {
  transform: translateY(-5px) !important;
  box-shadow: 0 20px 40px rgba(132, 43, 255, 0.5) !important;
}

.button--cta:active {
  transform: translateY(-2px) !important;
}

@media (max-width: 640px) {
  .button--cta {
    padding: 14px 28px;
    font-size: 16px;
    line-height: 1.2;
    width: 100%;
  }
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: transparent;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              background 0.3s ease,
              border-color 0.3s ease;
}

/* Theme Toggle Button */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  background: var(--surface-light);
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.theme-toggle:active {
  transform: translateY(0);
}

.theme-icon {
  position: absolute;
  transition: all 0.3s ease;
  color: var(--text-color);
}

.theme-icon--sun {
  opacity: 1;
  transform: scale(1);
}

.theme-icon--moon {
  opacity: 0;
  transform: scale(0.8);
}

[data-theme="dark"] .theme-icon--sun {
  opacity: 0;
  transform: scale(0.8);
}

[data-theme="dark"] .theme-icon--moon {
  opacity: 1;
  transform: scale(1);
}

/* Mobile theme toggle */
.theme-toggle--mobile {
  display: none;
  position: fixed;
  top: 16px;
  right: 72px;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  pointer-events: auto;
}

[data-theme="dark"] .theme-toggle--mobile,
[data-theme="dark"] .menu-toggle {
  background: rgba(34, 34, 46, 0.95);
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-color);
  transition: transform 0.3s ease, opacity 0.3s ease, background 0.3s ease;
}

.nav-open .menu-toggle {
  transform: rotate(180deg);
  background: var(--primary-color);
  border-color: var(--primary-color);
}

.nav-open .menu-toggle span {
  background: #ffffff;
}

.nav-open .menu-toggle span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}

.nav-open .menu-toggle span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.nav-open .primary-nav {
  display: flex;
  flex-direction: column;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: var(--background);
  padding: 12px 16px 16px;
  border-bottom: 1px solid var(--border-color);
  gap: 12px;
}

[data-theme="dark"] .nav-open .primary-nav {
  background: var(--surface-color);
}

/* Hero */
.hero {
  padding: 180px 0 96px;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

@media (max-width: 1200px) {
  .hero__grid {
    gap: 60px;
  }
}

@media (max-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 80px;
  }

  .hero__image {
    transform: none;
  }
}

.hero__title {
  font-size: clamp(27.5px, 4vw, 45px);
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 24px;
}

@media (min-width: 901px) {
  .hero__title br {
    display: none;
  }
}

.hero__title-mark {
  color: var(--primary-color);
  font-size: 0.6em;
  vertical-align: super;
  margin-left: 2px;
}

.hero__typed {
  color: var(--primary-color);
  font-size: 1em;
  display: inline-block;
  margin-left: 4px;
}

.hero__typed::after {
  content: "|";
  color: var(--primary-color);
  animation: blink 0.7s infinite;
  font-weight: 300;
  margin-left: 2px;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero__subtitle {
  margin: 0 0 32px;
  font-size: 22px;
  font-weight: 450;
  color: var(--text-color);
  line-height: 1.55;
  max-width: 620px;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.hero__price {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero__price-label {
  font-size: 14px;
  color: var(--muted-color);
  font-weight: 500;
}

.hero__price-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-color);
  line-height: 1;
}

.hero__cta {
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 700;
}


.hero__media {
  display: flex;
  justify-content: center;
}

.hero__image {
  max-width: 100%;
  width: 100%;
  height: auto;
  border-radius: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Benefits */
.benefits {
  padding: 80px 0;
  background: #ffffff;
}

[data-theme="dark"] .benefits {
  background: var(--surface-color);
}

.benefits__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
}

.benefits__header .button {
  padding: 16px 37px;
  font-size: 16px;
  font-weight: 700;
  min-width: 230px;
  white-space: nowrap;
}

.benefits__title {
  margin: 0;
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 700;
  line-height: 1.2;
  max-width: 720px;
}

.benefits__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.benefit-card {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 20px;
  align-items: center;
  padding: 40px 36px;
  background: #ffffff;
  border: 1px solid #ececf4;
  min-height: 140px;
  transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .benefit-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .benefit-card:hover {
  background: linear-gradient(135deg, var(--surface-light) 0%, var(--surface-color) 100%);
  box-shadow: 0 8px 32px rgba(132, 43, 255, 0.15);
}


.water-ripple {
  position: absolute;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%) scale(0);
  background: radial-gradient(
    circle,
    transparent 40%,
    rgba(132, 43, 255, 0.15) 50%,
    rgba(168, 85, 247, 0.1) 60%,
    transparent 70%
  );
  animation: rippleWave 2s ease-out forwards;
}

.water-ripple::before {
  content: '';
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    transparent 50%,
    rgba(132, 43, 255, 0.08) 60%,
    transparent 70%
  );
  animation: rippleWave 2s ease-out 0.2s forwards;
}

@keyframes rippleWave {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  60% {
    opacity: 0.6;
  }
  100% {
    transform: scale(3.5);
    opacity: 0;
  }
}

.benefit-card__icon,
.benefit-card__text {
  position: relative;
  z-index: 1;
}

.benefit-card__glow {
  position: absolute;
  width: 80px;
  height: 80px;
  background: radial-gradient(
    circle,
    rgba(132, 43, 255, 0.15) 0%,
    rgba(132, 43, 255, 0.08) 40%,
    transparent 70%
  );
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  filter: blur(15px);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.benefit-card:hover {
  background: linear-gradient(135deg, #fdfcff 0%, #f8f5ff 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(132, 43, 255, 0.1);
}

.benefit-card {
  border-radius: 16px;
}

.benefit-card__icon {
  width: 72px;
  height: 72px;
}

.benefit-card__text {
  margin: 0;
  font-size: 20px;
  font-weight: 500;
  color: var(--text-color);
  line-height: 1.4;
}

@media (max-width: 1100px) {
  .benefit-card {
    padding: 32px 28px;
    grid-template-columns: 60px 1fr;
    gap: 16px;
  }
  
  .benefit-card__icon {
    width: 60px;
    height: 60px;
  }
  
  .benefit-card__text {
    font-size: 18px;
  }
}

@media (max-width: 900px) {
  .benefits__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .benefits__grid {
    grid-template-columns: 1fr;
  }
  
  .benefit-card {
    padding: 28px 24px;
    grid-template-columns: 56px 1fr;
  }
  
  .benefit-card__icon {
    width: 56px;
    height: 56px;
  }
  
  .benefit-card__text {
    font-size: 17px;
  }
  
  .benefit-card { border-radius: 16px; }
}

/* Calculator intro */
.calculator {
  padding: 80px 0;
}

[data-theme="dark"] .calculator {
  background: var(--surface-light);
}

.calculator__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  align-items: center;
}

.calculator__title {
  margin: 0 0 14px;
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 700;
}

.calculator__subtitle {
  margin: 0 0 28px;
  font-size: 18px;
  font-weight: 450;
  color: var(--muted-color);
}

.calculator__media {
  margin: 0;
  display: flex;
  justify-content: center;
}

.calculator__image {
  width: 100%;
  max-width: 520px;
  border-radius: 20px;
  box-shadow: 0 16px 32px rgba(16, 16, 24, 0.12);
}

/* Calculator form */
.calculator-form {
  padding: 0;
  background: #f8f8fc;
}

[data-theme="dark"] .calculator-form {
  background: var(--surface-color);
}

.calculator-form__body {
  display: block;
}

.calculator-form__header {
  margin-bottom: 24px;
}

.calculator-form__title {
  margin: 0 0 10px;
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
}

.calculator-form__subtitle {
  margin: 0;
  font-size: 17px;
  font-weight: 450;
  color: var(--muted-color);
}

.calculator-form__progress {
  position: relative;
  height: 6px;
  background: #e3e3f2;
  border-radius: 999px;
  margin-bottom: 32px;
  overflow: hidden;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.calculator-form__progress.is-hidden {
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  position: absolute;
}

.calculator-form__counter {
  margin-top: -16px;
  margin-bottom: 24px;
  font-size: 13px;
  color: var(--muted-color);
  opacity: 1;
  transition: opacity 0.3s ease;
}

.calculator-form__counter.is-hidden {
  opacity: 0;
  position: absolute;
  pointer-events: none;
}

.calculator-form__progress-bar {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), #a855f7);
  border-radius: 999px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.calculator-form__step {
  border: none;
  padding: 0;
  margin: 0;
  display: none;
  gap: 12px;
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.calculator-form__step.is-active {
  display: grid;
  opacity: 1;
  transform: translateX(0);
  animation: stepSlideIn 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.calculator-form__step.is-leaving {
  animation: stepSlideOut 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes stepSlideIn {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes stepSlideOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(-40px);
  }
}

.calculator-form__step--intro {
  border: none;
  padding: 0;
  margin: 0;
}

.calculator-form__step--intro.is-active {
  display: block;
}

.calculator-form__intro {
  display: grid;
  grid-template-columns: 50% 50%;
  gap: 0;
  align-items: stretch;
  background: #f8f8fc;
  min-height: 520px;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
}

[data-theme="dark"] .calculator-form__intro {
  background: var(--surface-color);
}

.calculator-form__intro-media {
  position: relative;
  overflow: hidden;
  border-radius: 0 24px 24px 0;
}

.calculator-form__intro-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 520px;
}

.calculator-form__intro-content {
  padding: 60px 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px;
}

.calculator-form__intro-content h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-color);
}

.calculator-form__intro-content p {
  margin: 0;
  color: var(--muted-color);
  font-size: 19px;
  line-height: 1.6;
}

.calculator-form__intro-content .button {
  width: fit-content;
  padding: 14px 28px;
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.calculator-form__intro-content .button::after {
  content: "→";
  font-size: 22px;
  transition: transform 0.2s ease;
}

.calculator-form__intro-content .button:hover::after {
  transform: translateX(4px);
}

.calculator-form__questions {
  display: none;
  padding: 80px 0 96px;
  background: #f4f4fb;
}

[data-theme="dark"] .calculator-form__questions {
  background: var(--surface-light);
}

.calculator-form__questions.is-visible {
  display: block;
}

@media (max-width: 900px) {
  .calculator-form__intro {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .calculator-form__intro-media {
    border-radius: 0;
  }
  
  .calculator-form__intro-media img {
    min-height: 320px;
    max-height: 420px;
  }
  
  .calculator-form__intro-content {
    padding: 48px 32px;
  }
}

@media (max-width: 600px) {
  .calculator-form__intro-content {
    padding: 40px 24px;
  }
  
  .calculator-form__intro-content h2 {
    font-size: 26px;
  }
  
  .calculator-form__intro-content p {
    font-size: 17px;
  }
  
  .calculator-form__questions {
    padding: 56px 0 72px;
  }
}

.calculator-form__legend {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-color);
  position: relative;
  padding-left: 18px;
}

.calculator-form__legend::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: linear-gradient(180deg, var(--primary-color), #a855f7);
  border-radius: 4px;
}

.option-card {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 12px;
  align-items: center;
  padding: 14px 18px;
  background: #ffffff;
  border-radius: 12px;
  border: 2px solid #e8e8f2;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .option-card {
  background: var(--surface-color);
  border: 2px solid var(--border-color);
}

.option-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(132, 43, 255, 0.08), rgba(168, 85, 247, 0.04));
  opacity: 0;
  transition: opacity 0.25s ease;
}

.option-card:hover {
  border-color: #c4b5fd;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(132, 43, 255, 0.12);
}

.option-card:hover::before {
  opacity: 1;
}

.option-card:has(input:checked) {
  border-color: var(--primary-color);
  background: linear-gradient(135deg, rgba(132, 43, 255, 0.06), rgba(168, 85, 247, 0.03));
  box-shadow: 0 4px 16px rgba(132, 43, 255, 0.2);
}

.option-card:has(input:checked)::after {
  content: "✓";
  position: absolute;
  top: 10px;
  right: 14px;
  width: 22px;
  height: 22px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  animation: checkPop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes checkPop {
  from {
    transform: scale(0);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.option-card input {
  margin: 0;
  accent-color: var(--primary-color);
  width: 18px;
  height: 18px;
}

.option-card__text {
  position: relative;
  z-index: 1;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  transition: color 0.2s ease;
}

.option-card:has(input:checked) .option-card__text {
  color: var(--primary-color);
}

.option-card__text strong {
  display: block;
  font-size: 18px;
  margin-bottom: 2px;
}

.option-card__text small {
  display: block;
  font-size: 13px;
  color: var(--muted-color);
  line-height: 1.2;
  font-weight: 400;
}

.option-inline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: 20px;
  padding: 10px 16px;
  background: #ffffff;
  border: 2px solid #e8e8f2;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.25s ease;
}

[data-theme="dark"] .option-inline {
  background: var(--surface-color);
  border: 2px solid var(--border-color);
}

.option-inline:hover {
  border-color: #c4b5fd;
  background: rgba(132, 43, 255, 0.03);
}

.option-inline:has(input:checked) {
  border-color: var(--primary-color);
  background: rgba(132, 43, 255, 0.08);
}

.option-inline input {
  accent-color: var(--primary-color);
  width: 18px;
  height: 18px;
}

.option-inline span {
  font-size: 16px;
  font-weight: 500;
}

.range-wrapper {
  display: grid;
  gap: 12px;
}

.range-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.range-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-color);
  min-width: 64px;
  text-align: right;
  transition: transform 0.2s ease;
}

.range-value.is-changing {
  transform: scale(1.1);
}

.range-input {
  width: 100%;
  height: 8px;
  -webkit-appearance: none;
  appearance: none;
  background: #e8e8f2;
  border-radius: 999px;
  outline: none;
  cursor: pointer;
  transition: background 0.2s ease;
}

[data-theme="dark"] .range-input {
  background: var(--border-color);
}

.range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--primary-color), #a855f7);
  border-radius: 50%;
  cursor: grab;
  box-shadow: 0 4px 12px rgba(132, 43, 255, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.range-input::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 6px 20px rgba(132, 43, 255, 0.45);
}

.range-input::-webkit-slider-thumb:active {
  cursor: grabbing;
  transform: scale(1.1);
}

.range-input::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--primary-color), #a855f7);
  border-radius: 50%;
  border: none;
  cursor: grab;
  box-shadow: 0 4px 12px rgba(132, 43, 255, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.range-input::-moz-range-thumb:hover {
  transform: scale(1.15);
}

.range-input::-moz-range-track {
  height: 8px;
  background: #e8e8f2;
  border-radius: 999px;
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted-color);
  margin-top: -4px;
}

.calculator-form__contacts {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.input-field {
  display: grid;
  gap: 10px;
  font-size: 15px;
  color: var(--muted-color);
}

.input-field small {
  font-size: 12px;
  color: #999;
  font-weight: 400;
}

.input-field span {
  font-size: 15px;
  font-weight: 600;
}

.input-field input {
  padding: 16px 18px;
  border-radius: 12px;
  border: 2px solid #e8e8f2;
  font-size: 16px;
  background: #ffffff;
  transition: all 0.25s ease;
}

.input-field input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(132, 43, 255, 0.1);
}

[data-theme="dark"] .input-field input {
  background: var(--surface-light);
  border: 2px solid var(--border-color);
  color: var(--text-color);
}

[data-theme="dark"] .input-field input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(132, 43, 255, 0.2);
}

.input-field input::placeholder {
  color: #b0b0c0;
}

.input-field input.is-invalid {
  border-color: #e11d48;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.field-error {
  color: #e11d48;
  font-size: 12px;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

.calculator-form__step.is-invalid {
  border: 2px solid #e11d48;
  border-radius: 12px;
  padding: 12px;
  animation: shake 0.4s ease;
}

.calculator-form__actions {
  margin-top: 16px;
  display: flex;
  gap: 12px;
  opacity: 1;
  transform: translateY(0);
  transition: all 0.35s ease;
}

.calculator-form__actions.is-hidden {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  position: absolute;
}

.calculator-form__result {
  background: linear-gradient(135deg, #ffffff, #faf8ff);
  border-radius: 16px;
  padding: 20px 24px;
  border: 2px solid #ececf4;
  display: grid;
  gap: 8px;
  margin-top: 8px;
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 32px rgba(132, 43, 255, 0.08);
}

[data-theme="dark"] .calculator-form__result {
  background: linear-gradient(135deg, var(--surface-color), var(--surface-light));
  border: 2px solid var(--border-color);
  box-shadow: 0 8px 32px rgba(132, 43, 255, 0.15);
}

.calculator-form__result-value {
  font-size: 36px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform 0.3s ease;
}

.calculator-form__result-value.is-updating {
  animation: valueUpdate 0.4s ease;
}

@keyframes valueUpdate {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.calculator-form__result.is-hidden {
  opacity: 0;
  transform: translateY(20px) scale(0.95);
  pointer-events: none;
  position: absolute;
}

/* Calculator Results */
.calculator-results {
  display: flex;
  flex-direction: column;
  gap: 24px;
  width: 100%;
}

.calculator-results__primary {
  background: linear-gradient(135deg, rgba(132, 43, 255, 0.1), rgba(168, 85, 247, 0.05));
  border: 2px solid var(--primary-color);
  border-radius: 20px;
  padding: 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 12px 32px rgba(132, 43, 255, 0.15);
}

.calculator-results__label {
  font-size: 16px;
  font-weight: 600;
  color: var(--muted-color);
  letter-spacing: 0.05em;
}

.calculator-results__value--yearly {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1;
}

.calculator-results__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.calculator-results__item {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.calculator-results__value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-color);
}

.calculator-results__disclaimer {
  font-size: 13px;
  color: var(--muted-color);
  text-align: center;
  margin-top: 12px;
  line-height: 1.5;
  font-weight: 400;
  font-style: italic;
}

@media (max-width: 600px) {
  .calculator-results__grid {
    grid-template-columns: 1fr;
  }
  
  .calculator-results__primary {
    padding: 24px;
  }
}

/* Responsive */
@media (max-width: 1300px) {
  .header__contacts {
    margin-right: 12px;
    font-size: 16px;
  }

  .header__inner {
    gap: 8px;
  }

  .primary-nav {
    gap: 2px;
  }

  .nav__link {
    padding: 10px 8px;
    font-size: 16px;
  }

  .logo {
    min-width: auto;
  }

  .site-header .button {
    padding: 12px 18px;
    font-size: 16px;
  }
}

@media (max-width: 1100px) {
  .primary-nav {
    display: none;
  }

  .nav-open .primary-nav {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
  }

  .header__actions {
    margin-left: auto;
  }

  .header__contacts {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .benefits__header {
    flex-direction: column;
    align-items: stretch;
  }

  .benefits__header .button {
    min-width: auto;
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
    padding: 14px 28px;
    font-size: 16px;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: none;
    pointer-events: none;
  }

  .header__inner {
    padding: 0;
  }

  .header__contacts,
  .header__actions {
    display: none !important;
  }

  .logo {
    position: static;
    pointer-events: auto;
  }

  .logo__image {
    width: 120px;
  }

  .primary-nav {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    pointer-events: auto;
  }

  .theme-toggle--mobile {
    display: inline-flex;
    right: 68px;
  }

  .primary-nav {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 76px;
    left: 16px;
    right: 16px;
    background: #ffffff;
    padding: 8px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    gap: 4px;
    z-index: 999;
    pointer-events: none;
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-open .primary-nav {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
  }

  .primary-nav .nav__link {
    padding: 16px 20px;
    border-radius: 12px;
    font-size: 18px;
    text-align: center;
    transition: background 0.2s, transform 0.2s;
    opacity: 0;
    transform: translateX(-10px);
  }

  .nav-open .primary-nav .nav__link {
    opacity: 1;
    transform: translateX(0);
  }

  .nav-open .primary-nav .nav__link:nth-child(1) { transition-delay: 0.05s; }
  .nav-open .primary-nav .nav__link:nth-child(2) { transition-delay: 0.1s; }
  .nav-open .primary-nav .nav__link:nth-child(3) { transition-delay: 0.15s; }
  .nav-open .primary-nav .nav__link:nth-child(4) { transition-delay: 0.2s; }
  .nav-open .primary-nav .nav__link:nth-child(5) { transition-delay: 0.25s; }
  .nav-open .primary-nav .nav__link:nth-child(6) { transition-delay: 0.3s; }
  .nav-open .primary-nav .nav__link:nth-child(7) { transition-delay: 0.35s; }
  .nav-open .primary-nav .nav__link:nth-child(8) { transition-delay: 0.4s; }

  .primary-nav .nav__link:hover,
  .primary-nav .nav__link:active {
    background: #f8f8fc;
    transform: translateX(5px);
  }
  
  [data-theme="dark"] .primary-nav .nav__link:hover,
  [data-theme="dark"] .primary-nav .nav__link:active {
    background: var(--surface-light);
  }

  .hero {
    padding: 72px 0 56px;
  }

  .benefits,
  .calculator {
    padding: 56px 0;
  }
}

/* Technology */
.technology {
  padding: 80px 0;
}

.technology__grid {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto auto;
  gap: 40px;
  align-items: start;
}

.technology__sliders-wrapper {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.technology__slider-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.technology__slider-main {
  display: flex;
  align-items: center;
  gap: 16px;
}

.technology__work-examples-label {
  font-size: 14px;
  color: var(--muted-color);
  letter-spacing: 0.1em;
  font-weight: 600;
  margin: 0;
}

.technology__af-label {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary-color);
  margin-left: 8px;
  vertical-align: middle;
  display: inline-block;
  line-height: 1;
}

.technology__header {
  margin-bottom: 32px;
}


.technology__pretitle {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 8px;
}

.technology__title {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--primary-color);
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
  line-height: 1.1;
}

.technology__title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary-color);
}

.technology__subtitle {
  margin: 0 0 18px;
  font-size: 22px;
  font-weight: 500;
  color: var(--text-color);
}

.technology__list {
  margin: 0;
  padding-left: 22px;
  font-size: 20px;
  font-weight: 500;
  color: var(--text-color);
  display: grid;
  gap: 10px;
  line-height: 1.5;
}

.technology__gallery {
  display: flex;
  gap: 0;
}

.technology__gallery img,
.technology__gallery video {
  flex: 0 0 100%;
  min-width: 100%;
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.move-left {
  transform: translateX(-8px);
}

/* Slider */
.slider {
  position: relative;
  display: block;
  width: 320px;
  height: 480px;
  border-radius: 20px;
  overflow: hidden;
  background: #f8f8fc;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .slider {
  background: var(--surface-light);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.slider__track {
  display: flex;
  transition: transform 0.4s ease;
}

.slider__btn {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid #e8e8f0;
  background: #ffffff;
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 100; /* Ensure buttons are always above stacked slides */
}

[data-theme="dark"] .slider__btn {
  background: var(--surface-color);
  border-color: var(--border-color);
  color: var(--text-color);
}

[data-theme="dark"] .slider__btn:hover {
  background: var(--surface-light);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.slider__btn:hover {
  background: #f8f8fc;
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* Reveal animations */
.reveal,
.reveal-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.is-visible,
.reveal-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children animation */
.reveal-item:nth-child(1) { transition-delay: 0.1s; }
.reveal-item:nth-child(2) { transition-delay: 0.2s; }
.reveal-item:nth-child(3) { transition-delay: 0.3s; }
.reveal-item:nth-child(4) { transition-delay: 0.4s; }
.reveal-item:nth-child(5) { transition-delay: 0.5s; }
.reveal-item:nth-child(6) { transition-delay: 0.6s; }

/* CTA Section */
.cta-section {
  padding: 100px 0;
  background: #f4f4fb;
  position: relative;
  z-index: 10;
  overflow: visible;
}

[data-theme="dark"] .cta-section {
  background: var(--surface-light);
}

.cta-section__content {
  max-width: 1000px;
  margin: 0 auto;
}


.cta-section__title {
  margin: 0 0 20px;
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
}

.cta-section__subtitle {
  margin: 0 0 40px;
  font-size: 22px;
  color: var(--text-color);
}

.cta-section__form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.cta-section__form .button {
  grid-column: 1 / -1;
  padding: 14px 28px;
  font-size: 16px;
}

@media (max-width: 600px) {
  .cta-section__form {
    grid-template-columns: 1fr;
  }
}

.cta-section__form input {
  width: 100%;
  padding: 22px 24px;
  border: 2px solid #e8e8f2;
  border-radius: 14px;
  font-size: 18px;
  background: #ffffff;
  transition: border-color 0.2s ease;
}

[data-theme="dark"] .cta-section__form input {
  background: var(--surface-light);
  border: 2px solid var(--border-color);
  color: var(--text-color);
}

.cta-section__form input:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Intl Tel Input */
.cta-section__form .iti {
  width: 100%;
  position: relative;
  z-index: 50;
}

.cta-section__form .iti input {
  width: 100%;
  padding: 22px 24px 22px 90px;
  border: 2px solid #e8e8f2;
  border-radius: 14px;
  font-size: 18px;
  background: #ffffff;
  transition: border-color 0.2s ease;
}

[data-theme="dark"] .cta-section__form .iti input {
  background: var(--surface-light);
  border: 2px solid var(--border-color);
  color: var(--text-color);
}

.cta-section__form .iti input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.iti__country-container {
  padding-left: 16px;
}

.iti__selected-country {
  border-radius: 14px 0 0 14px;
  padding: 0 12px 0 0;
}

.iti__selected-dial-code {
  margin-right: 12px;
}

.iti {
  width: 100%;
}

.iti__dropdown-content {
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
  border: 1px solid #e8e8f2;
  z-index: 9999 !important;
  position: fixed !important;
}

[data-theme="dark"] .iti__dropdown-content {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.iti__search-input {
  padding: 12px 16px;
  font-size: 16px;
  border: none;
  border-bottom: 1px solid #e8e8f2;
}

[data-theme="dark"] .iti__search-input {
  background: var(--surface-color);
  color: var(--text-color);
  border-bottom: 1px solid var(--border-color);
}

.iti__country-list {
  max-height: 280px;
}

.iti__country {
  padding: 10px 16px;
  font-size: 15px;
}

.iti__country:hover {
  background: #f5f5fa;
}

.iti__country.iti__highlight {
  background: #f0f0ff;
}

[data-theme="dark"] .iti__country {
  color: var(--text-color);
}

[data-theme="dark"] .iti__country:hover {
  background: var(--surface-light);
}

[data-theme="dark"] .iti__country.iti__highlight {
  background: var(--surface-light);
}

.iti__dial-code {
  color: var(--muted-color);
}

/* Patent */
.patent {
  padding: 80px 0;
  background: #ffffff;
  position: relative;
  z-index: 1;
}

[data-theme="dark"] .patent {
  background: var(--surface-color);
}

.patent__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  align-items: center;
}


.patent__title {
  margin: 0 0 14px;
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
}

.patent__text {
  margin: 0 0 20px;
  font-size: 17px;
  font-weight: 450;
  line-height: 1.6;
  color: #000;
}

[data-theme="dark"] .patent__text {
  color: var(--text-color);
}

.patent__flags {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-top: 28px;
  width: 100%;
}

.patent__flags .fi {
  width: 100%;
  height: 0;
  padding-bottom: 60%;
  background-size: cover;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  transition: transform 0.2s ease;
}

.patent__flags .fi:hover {
  transform: scale(1.15);
}

.patent__cta {
  background: #ffffff;
  padding: 20px;
  border-radius: 16px;
  box-shadow: 0 12px 24px rgba(16, 16, 24, 0.08);
  display: grid;
  gap: 12px;
}

[data-theme="dark"] .patent__cta {
  background: var(--surface-light);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.patent__form {
  display: grid;
  gap: 12px;
}

.patent__form input {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid #d9d9e6;
  font-size: 14px;
}

[data-theme="dark"] .patent__form input {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  color: var(--text-color);
}

.patent__media.reveal-item {
  opacity: 0;
  transform: translateX(80px);
  transition: opacity 0.9s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.9s cubic-bezier(0.4, 0, 0.2, 1);
}

.patent__media.reveal-item.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.patent__media img {
  width: 100%;
  border-radius: 16px;
  box-shadow: 0 18px 32px rgba(16, 16, 24, 0.12);
}

/* Patent Slider */
.patent__slider-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.patent__slider-main {
  display: flex;
  align-items: center;
  gap: 16px;
}

.patent__slider-main .slider {
  width: 400px;
  height: 600px;
}

.patent__slider-label {
  font-size: 14px;
  color: var(--muted-color);
  letter-spacing: 0.1em;
  font-weight: 600;
  margin: 0;
}

.patent__gallery:not(.slider--stacked .slider__track) {
  display: flex;
  gap: 0;
}

.slider--stacked .patent__gallery {
  display: block;
}

.patent__gallery img {
  flex: 0 0 100%;
  min-width: 100%;
  width: 100%;
  height: 600px;
  object-fit: cover;
}

/* Stacked Slider Effect */
.patent__media .slider--stacked {
  overflow: visible !important;
  background: transparent !important;
  box-shadow: none !important;
  flex-shrink: 0 !important;
  width: 400px !important;
  height: 600px !important;
  display: block !important;
}

.patent__media .slider--stacked .slider__track {
  display: block !important;
  transform: none !important;
  width: 100% !important;
  height: 100% !important;
  position: relative !important;
}

.patent__media .slider--stacked .slider__track > * {
  position: absolute !important;
  top: 0 !important;
  left: 0 !important;
  width: 100% !important;
  height: 100% !important;
  margin: 0 !important;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.6s ease !important;
  pointer-events: none !important;
  opacity: 0 !important;
  z-index: 1 !important;
  background: #fff !important;
  color: #000 !important;
  border-radius: 20px !important;
  backface-visibility: hidden !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1) !important;
  object-fit: cover !important;
}

/* The next slide peeking from the right */
.patent__media .slider--stacked .slider__track > .is-next {
  opacity: 1 !important;
  z-index: 9 !important;
  transform: translate3d(30px, 10px, -50px) scale(0.95) !important;
}

/* The next-next slide peeking further from the right */
.patent__media .slider--stacked .slider__track > .is-next-next {
  opacity: 1 !important;
  z-index: 8 !important;
  transform: translate3d(60px, 20px, -100px) scale(0.9) !important;
}

.patent__media .slider--stacked .slider__track > .is-active {
  pointer-events: auto !important;
  opacity: 1 !important;
  z-index: 10 !important;
  transform: translate3d(0, 0, 0) !important;
}

/* The "prolisting" animation - slide out to the left to reveal right stack */
.patent__media .slider--stacked .slider__track > .is-leaving {
  opacity: 0 !important;
  z-index: 11 !important;
  transform: translate3d(-110%, 0, 0) rotate(-10deg) !important;
}

@media (max-width: 900px) {
  .patent__media .slider--stacked {
    width: 280px !important;
    height: 420px !important;
    margin: 0 auto 0 0 !important; /* Align left to leave room for right offsets */
  }
}

@media (max-width: 560px) {
  .patent__media .slider--stacked {
    width: 240px !important;
    height: 360px !important;
  }
  
  .patent__media .slider--stacked .slider__track > .is-next {
    transform: translate3d(15px, 5px, -50px) scale(0.97) !important;
  }
  
  .patent__media .slider--stacked .slider__track > .is-next-next {
    transform: translate3d(30px, 10px, -100px) scale(0.94) !important;
  }
}

/* Tariffs */
.tariffs {
  padding: 80px 0;
}

[data-theme="dark"] .tariffs {
  background: var(--surface-color);
}

.tariffs__header {
  margin-bottom: 32px;
}

.tariffs__common {
  margin-bottom: 48px;
  padding: 40px;
  background: var(--surface-light);
  border-radius: 24px;
  border: 1px solid var(--border-color);
}

.tariffs__features-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 16px 40px;
}

.tariffs__features-list li {
  position: relative;
  padding-left: 28px;
  font-size: 17px;
  line-height: 1.5;
  color: var(--text-color);
}

.tariffs__features-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: 700;
}

.tariffs__title {
  margin: 0 0 10px;
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
}

.tariffs__subtitle {
  margin: 0;
  font-size: 17px;
  font-weight: 450;
  color: var(--muted-color);
}

.tariffs__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  max-width: 1000px;
  margin: 0 auto;
}

.tariff-card {
  background: #ffffff;
  border-radius: 20px;
  padding: 48px 32px;
  border: 1px solid #ececf4;
  display: flex;
  flex-direction: column;
  gap: 24px;
  text-align: left;
  align-items: stretch;
  transition: all 0.3s ease;
  position: relative;
  overflow: visible;
}

.tariff-card__discount {
  position: absolute;
  top: -12px;
  right: -12px;
  display: flex;
  align-items: baseline;
  gap: 6px;
  background: linear-gradient(135deg, var(--primary-color), #a855f7);
  color: #fff;
  padding: 8px 16px;
  border-radius: 50px;
  transform: rotate(3deg);
  box-shadow: 0 8px 20px rgba(132, 43, 255, 0.3);
  z-index: 10;
  border: 2px solid #fff;
}

.discount-value {
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
}

.discount-text {
  font-size: 14px;
  font-weight: 600;
  text-transform: lowercase;
  opacity: 0.95;
}

[data-theme="dark"] .tariff-card {
  background: var(--surface-light);
  border: 1px solid var(--border-color);
}

.tariff-card--highlight {
  border-color: var(--primary-color);
  background: linear-gradient(135deg, #faf8ff 0%, #f3eeff 100%);
  box-shadow: 0 18px 32px rgba(132, 43, 255, 0.18);
}

[data-theme="dark"] .tariff-card--highlight {
  background: linear-gradient(135deg, var(--surface-light) 0%, rgba(132, 43, 255, 0.08) 100%);
  border-color: var(--primary-color);
}

.tariff-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 16px;
  width: 100%;
  flex-direction: column;
}

.tariff-card__header h3 {
  margin: 0;
  font-size: 32px;
  font-weight: 700;
}

.tariff-card__badge {
  font-size: 24px;
  font-weight: 600;
  color: var(--primary-color);
  white-space: nowrap;
}

.tariff-card__price {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary-color);
  margin: 8px 0;
}

.tariff-card__subtitle {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
  color: var(--text-color);
}

.tariff-card ul {
  margin: 0;
  padding-left: 0;
  color: var(--text-color);
  display: grid;
  gap: 6px;
  list-style: none;
  font-size: 16px;
}

.tariff-card ul li {
  position: relative;
  padding-left: 24px;
  line-height: 1.3;
}

.tariff-card ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: 700;
}

.tariff-card__footer {
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 16px;
  margin-top: auto;
  padding-top: 16px;
}


.button--outline {
  background: transparent;
  border: 1.5px solid var(--primary-color);
  color: var(--primary-color);
  padding: 14px 28px;
  border-radius: 14px;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}

.button--outline:hover {
  background: var(--primary-color);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(132, 43, 255, 0.25);
}

.button--outline:active {
  transform: translateY(0);
  box-shadow: 0 2px 5px rgba(132, 43, 255, 0.2);
}

.tariffs__notes {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  margin-top: 24px;
  padding: 16px;
  background: #f8f8fc;
  border-radius: 16px;
  border: 1px solid #ececf4;
}

[data-theme="dark"] .tariffs__notes {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
}

.tariffs__note-icon {
  width: 48px;
  height: 48px;
}

.tariffs__note-text p {
  margin: 0 0 8px;
  color: var(--muted-color);
}

.tariffs__note-text p:last-child {
  margin-bottom: 0;
}

/* Revenue */
.revenue {
  padding: 80px 0;
  background: #f8f8fc;
  text-align: center;
}

[data-theme="dark"] .revenue {
  background: var(--surface-light);
}

.revenue__content {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.revenue__title {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.2;
}

.revenue__text {
  margin: 0;
  font-size: 20px;
  line-height: 1.6;
  color: var(--muted-color);
}

.revenue__actions {
  margin-top: 8px;
}

.roi-link {
  color: var(--primary-color);
  text-decoration: underline;
  text-decoration-style: dashed;
  text-underline-offset: 4px;
  transition: all 0.2s ease;
}

.roi-link:hover {
  text-decoration-style: solid;
  opacity: 0.8;
}

@media (max-width: 640px) {
  .revenue {
    padding: 56px 0;
  }
  
  .revenue__text {
    font-size: 18px;
  }
}

/* Partnership */
.partnership {
  padding: 80px 0;
  background: #f8f8fc;
}

[data-theme="dark"] .partnership {
  background: var(--surface-color);
}

.partnership__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  align-items: center;
}


.partnership__title {
  margin: 0 0 18px;
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
}

.partnership__list {
  margin: 0 0 28px;
  font-size: 17px;
  line-height: 1.7;
  padding-left: 20px;
  color: var(--text-color);
  display: grid;
  gap: 10px;
}

.partnership__media img {
  width: 100%;
  border-radius: 16px;
  box-shadow: 0 18px 32px rgba(16, 16, 24, 0.12);
}

/* Footer */
.site-footer {
  background: #1a1a1a;
  padding: 0;
}

[data-theme="dark"] .site-footer {
  background: #121218;
}

.footer__contacts-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__contacts-row a {
  color: #ffffff;
  font-size: 18px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer__contacts-row a:hover {
  color: var(--primary-color);
}

.footer__social-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.footer__social-link svg {
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.footer__social-link:hover svg {
  transform: scale(1.1);
}

.footer__main {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 32px;
  padding: 30px 0 10px;
}

.footer__brand {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  position: relative;
}

.footer__brand .logo__mark {
  font-size: 22px;
}

.footer__brand--right {
  justify-content: flex-end;
}

.footer__logo {
  width: 160px;
  height: auto;
  filter: brightness(0) invert(1);
}

.footer__brand--right .footer__logo {
  filter: none;
}


.footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px 32px;
  font-size: 20px;
  font-weight: 600;
}

.footer__nav a {
  color: #ffffff;
  text-decoration: none;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.footer__nav a:hover {
  color: var(--primary-color);
}

.footer__bottom {
  margin-top: 10px;
  padding: 10px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer__legal {
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
  margin: 0;
}


/* Modal */
.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.is-open {
  display: flex;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 20, 0.6);
}

.modal__content {
  position: relative;
  background: #ffffff;
  border-radius: 16px;
  padding: 24px;
  width: min(520px, 100% - 32px);
  box-shadow: 0 20px 40px rgba(16, 16, 24, 0.2);
  z-index: 1;
  display: grid;
  gap: 16px;
}

[data-theme="dark"] .modal__content {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  border: none;
  background: transparent;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  z-index: 10;
  padding: 8px;
  color: var(--muted-color);
  transition: color 0.2s ease;
}

.modal__close:hover {
  color: var(--text-color);
}

.modal__title {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
}

.modal__subtitle {
  margin: 0;
  font-size: 16px;
  color: var(--muted-color);
}

.modal__form {
  display: grid;
  gap: 16px;
}

.modal__form input[type="text"] {
  width: 100%;
  padding: 18px 20px;
  border: 1px solid #e8e8f2;
  border-radius: 10px;
  font-size: 16px;
  background: #ffffff;
  transition: border-color 0.2s ease;
}

[data-theme="dark"] .modal__form input[type="text"] {
  background: var(--surface-light);
  border: 1px solid var(--border-color);
  color: var(--text-color);
}

.modal__form input[type="text"]:focus {
  outline: none;
  border-color: var(--primary-color);
}

.modal__form .iti {
  width: 100%;
}

.modal__form .iti input {
  width: 100%;
  padding: 18px 20px 18px 85px;
  border: 1px solid #e8e8f2;
  border-radius: 10px;
  font-size: 16px;
  background: #ffffff;
  transition: border-color 0.2s ease;
}

[data-theme="dark"] .modal__form .iti input {
  background: var(--surface-light);
  border: 1px solid var(--border-color);
  color: var(--text-color);
}

.modal__form .iti input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.modal__form .button {
  width: 100%;
  padding: 14px 23px;
  font-size: 16px;
}

@media (max-width: 640px) {
  .technology,
  .patent,
  .tariffs,
  .partnership {
    padding: 56px 0;
  }

  .technology__slider-wrapper {
    flex-direction: column;
    gap: 12px;
  }

  .slider {
    width: 100%;
    max-width: 100%;
    border-radius: 16px;
  }

  .technology__slider-wrapper .slider__btn {
    display: none;
  }

  .technology__slider-wrapper::after {
    content: "\2190  \041b\0438\0441\0442\0430\0439\0442\0435  \2192";
    font-size: 14px;
    color: var(--muted-color);
    text-align: center;
  }

  .technology__title {
    font-size: 24px;
  }

  .technology__subtitle {
    font-size: 18px;
  }

  .technology__list {
    font-size: 16px;
  }

  .tariffs__notes {
    grid-template-columns: 1fr;
  }

  .tariffs__common {
    padding: 24px 20px;
    margin-bottom: 32px;
  }

  .tariffs__features-list {
    gap: 12px;
  }
}

@media (max-width: 900px) {
  .hero__grid,
  .calculator__grid,
  .technology__grid,
  .patent__grid,
  .partnership__grid {
    grid-template-columns: 1fr;
  }

  .hero__media,
  .calculator__media,
  .patent__media,
  .partnership__media {
    justify-content: flex-start;
  }

  .tariffs__grid {
    grid-template-columns: 1fr;
  }

  .technology__sliders-wrapper {
    flex-direction: column;
    align-items: center;
  }

  .technology__slider-wrapper {
    width: 100%;
    justify-content: center;
  }

  .slider {
    width: 100%;
    max-width: 420px;
    height: auto;
    aspect-ratio: 3 / 4;
    margin: 0 auto;
  }

  .technology__gallery img,
  .technology__gallery video {
    height: auto;
    aspect-ratio: 3 / 4;
  }
}

@media (max-width: 768px) {
  .header__inner {
    gap: 16px;
    flex-wrap: wrap;
  }

  .logo {
    min-width: auto;
  }

  .primary-nav {
    width: 100%;
  }

  .nav-open .primary-nav {
    position: static;
    border: none;
    padding: 8px 0 0;
  }

  .tariffs__grid {
    grid-template-columns: 1fr;
  }

  .tariffs__common {
    padding: 32px;
  }

  .tariff-card__footer {
    flex-direction: column;
    align-items: stretch;
    gap: 20px;
  }

  .tariff-card__price-block {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .tariff-card__header h3 {
    font-size: 26px;
  }

  .tariff-card__badge {
    font-size: 20px;
  }

  .tariff-card__price {
    font-size: 24px;
  }

  .benefit-card {
    grid-template-columns: 48px 1fr;
    padding: 24px 20px;
  }
  
  .benefit-card__icon {
    width: 48px;
    height: 48px;
  }

  .calculator-form__contacts {
    grid-template-columns: 1fr;
  }

  .modal__content {
    width: calc(100% - 24px);
    padding: 20px;
  }

  .footer__contacts-row {
    flex-direction: column;
    gap: 12px;
  }

  .footer__main {
    display: flex;
    flex-direction: column;
    text-align: center;
    gap: 24px;
    padding: 32px 0;
  }

  .footer__main::after {
    display: none;
  }

  .footer__brand {
    justify-content: center;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(1200px, 100% - 24px);
  }

  .header__actions {
    width: 100%;
    justify-content: space-between;
  }

  .hero__actions .button,
  .cta-section__form .button,
  .calculator-form .button,
  .modal__form .button,
  .revenue__actions .button {
    width: 100%;
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .hero__price {
    flex-direction: column;
    align-items: flex-start;
  }

  .slider__btn {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }
}

/* ====== Notifications ====== */
.notification {
  position: fixed;
  top: 100px;
  right: 20px;
  max-width: 400px;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  z-index: 1000;
  transform: translateX(120%);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.4s ease;
}

[data-theme="dark"] .notification {
  background: var(--surface-color);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.notification.is-visible {
  transform: translateX(0);
  opacity: 1;
}

.notification--success {
  border-left: 4px solid #22c55e;
}

.notification--error {
  border-left: 4px solid #ef4444;
}

.notification__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  flex-shrink: 0;
}

.notification--success .notification__icon {
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  color: #fff;
}

.notification--error .notification__icon {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: #fff;
}

.notification__content {
  flex: 1;
  min-width: 0;
}

.notification__message {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-color);
}

.notification__close {
  width: 28px;
  height: 28px;
  border: none;
  background: #f3f4f6;
  border-radius: 50%;
  font-size: 18px;
  color: #6b7280;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s, color 0.2s;
}

[data-theme="dark"] .notification__close {
  background: var(--surface-light);
  color: var(--muted-color);
}

[data-theme="dark"] .notification__close:hover {
  background: var(--border-color);
  color: var(--text-color);
}

.notification__close:hover {
  background: var(--border-color);
  color: var(--text-color);
}

@media (max-width: 480px) {
  .notification {
    top: auto;
    bottom: 20px;
    right: 16px;
    left: 16px;
    max-width: none;
  }
}

/* Timeline */
.timeline {
  padding: 80px 0;
  background: #ffffff;
}

[data-theme="dark"] .timeline {
  background: var(--surface-color);
}

.timeline__title {
  margin: 0 0 48px;
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  text-align: center;
}

.timeline__list {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0;
  position: relative;
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Vertical line connecting elements */
.timeline__list::before {
  content: "";
  position: absolute;
  top: 24px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--border-color), var(--border-color));
  z-index: 0;
}

.timeline__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 1;
  min-width: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  background: #ffffff;
  border: 3px solid var(--border-color);
  border-radius: 50%;
  z-index: 2;
  transition: all 0.3s ease;
}

[data-theme="dark"] .timeline__item::before {
  background: var(--surface-color);
}

.timeline__item:hover::before {
  border-color: var(--primary-color);
  transform: translateX(-50%) scale(1.2);
  box-shadow: 0 0 0 4px rgba(132, 43, 255, 0.15);
}

.timeline__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  padding: 40px 16px 0;
  max-width: 220px;
}

.timeline__item-title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-color);
  line-height: 1.3;
}

.timeline__item-description {
  margin: 0;
  font-size: 14px;
  font-weight: 450;
  color: var(--muted-color);
  line-height: 1.5;
}

/* Accented last item */
.timeline__item--accented::before {
  border-color: var(--primary-color);
  background: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(132, 43, 255, 0.2);
}

.timeline__item--accented .timeline__item-title {
  color: var(--primary-color);
}

.timeline__item--accented .timeline__item-description {
  color: var(--text-color);
}

/* Mobile layout - vertical */
@media (max-width: 900px) {
  .timeline {
    padding: 56px 0;
  }

  .timeline__title {
    margin-bottom: 32px;
    text-align: left;
  }

  .timeline__list {
    flex-direction: column;
    gap: 0;
    position: relative;
  }

  .timeline__list::before {
    top: 0;
    left: 24px;
    right: auto;
    width: 2px;
    height: 100%;
    background: var(--border-color);
    z-index: 0;
  }

  .timeline__item {
    flex-direction: row;
    align-items: flex-start;
    gap: 20px;
    padding: 0 0 32px 0;
    position: relative;
    z-index: 1;
  }

  .timeline__item:last-child {
    padding-bottom: 0;
  }

  .timeline__item::before {
    top: 8px;
    left: 24px;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    border-width: 3px;
    z-index: 2;
    background: #ffffff;
  }

  .timeline__content {
    align-items: flex-start;
    text-align: left;
    padding: 0;
    padding-left: 48px;
    max-width: none;
    gap: 8px;
    flex: 1;
    min-width: 0;
    position: relative;
    z-index: 1;
  }

  .timeline__item-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.4;
  }

  .timeline__item-description {
    font-size: 15px;
    font-weight: 450;
    color: var(--muted-color);
    line-height: 1.6;
  }
}

@media (max-width: 600px) {
  .timeline {
    padding: 40px 0;
  }

  .timeline__title {
    margin-bottom: 24px;
    font-size: 24px;
  }

  .timeline__list::before {
    left: 20px;
  }

  .timeline__item {
    gap: 16px;
    padding-bottom: 24px;
  }

  .timeline__item::before {
    top: 6px;
    left: 20px;
    width: 14px;
    height: 14px;
    border-width: 2px;
  }

  .timeline__content {
    padding-left: 44px;
    gap: 6px;
  }

  .timeline__item-title {
    font-size: 16px;
  }

  .timeline__item-description {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .timeline {
    padding: 32px 0;
  }

  .timeline__title {
    margin-bottom: 20px;
    font-size: 22px;
  }

  .timeline__list::before {
    left: 18px;
  }

  .timeline__item {
    gap: 14px;
    padding-bottom: 20px;
  }

  .timeline__item::before {
    top: 6px;
    left: 18px;
    width: 12px;
    height: 12px;
    border-width: 2px;
  }

  .timeline__content {
    padding-left: 40px;
    gap: 4px;
  }

  .timeline__item-title {
    font-size: 15px;
  }

  .timeline__item-description {
    font-size: 13px;
    line-height: 1.5;
  }
}

/* Patent Slider Responsive */
@media (max-width: 900px) {
  .patent__slider-wrapper {
    width: 100%;
    justify-content: center;
  }

  .patent__slider-main .slider {
    width: 100%;
    max-width: 400px;
    height: auto;
    aspect-ratio: 3 / 4;
    margin: 0 auto;
  }

  .patent__gallery img {
    height: auto;
    aspect-ratio: 3 / 4;
  }
}

@media (max-width: 768px) {
  .patent__slider-main {
    gap: 12px;
  }

  .slider__btn {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }

  .patent__slider-label {
    font-size: 12px;
  }
}

@media (max-width: 560px) {
  .patent__slider-wrapper {
    gap: 12px;
  }

  .slider {
    width: 100%;
    max-width: 100%;
    border-radius: 16px;
  }

  .patent__slider-main .slider__btn {
    display: none;
  }

  .patent__slider-main::after {
    content: none;
  }
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.95);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lightbox.is-open {
  display: flex;
  opacity: 1;
}

.lightbox__overlay {
  position: absolute;
  inset: 0;
  cursor: pointer;
  background: rgba(0, 0, 0, 0.8);
  transition: background 0.3s ease;
}

.lightbox__overlay:hover {
  background: rgba(0, 0, 0, 0.9);
}

.lightbox__content {
  position: relative;
  max-width: 95vw;
  max-height: 95vh;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 20px;
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

.lightbox.is-open .lightbox__content {
  transform: scale(1);
}

.lightbox__image-container {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__image {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.lightbox__image:hover {
  transform: scale(1.02);
}

.lightbox__close,
.lightbox__btn {
  position: absolute;
  background: rgba(16, 16, 24, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: rgba(255, 255, 255, 0.7);
  font-size: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  z-index: 10;
}

.lightbox__close {
  top: 20px;
  right: 20px;
  font-size: 28px;
}

.lightbox__btn {
  top: 50%;
  transform: translateY(-50%);
  font-size: 28px;
}

.lightbox__btn--prev {
  left: 20px;
}

.lightbox__btn--next {
  right: 20px;
}

.lightbox__close:hover {
  background: rgba(16, 16, 24, 0.9);
  border-color: var(--primary-color);
  transform: none;
}

.lightbox__btn:hover {
  background: rgba(16, 16, 24, 0.9);
  border-color: var(--primary-color);
  transform: translateY(-50%) scale(1);
}

.lightbox__counter {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #ffffff;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  z-index: 10;
  transition: opacity 0.3s ease;
}

.lightbox__current,
.lightbox__separator,
.lightbox__total {
  color: #ffffff;
}

/* Touch gestures for mobile */
@media (max-width: 768px) {
  .lightbox__content {
    padding: 10px;
    gap: 10px;
  }
  
  .lightbox__close,
  .lightbox__btn,
  .lightbox__btn--prev,
  .lightbox__btn--next {
    display: none !important;
  }

  .lightbox__counter {
    bottom: 10px;
    padding: 6px 12px;
    font-size: 12px;
  }
}

/* Keyboard navigation indicators */
.lightbox__btn:focus,
.lightbox__close:focus {
  outline: 2px solid rgba(255, 255, 255, 0.5);
  outline-offset: 2px;
}

/* Contacts Section */
.contacts {
  padding: 80px 0;
  background: #f8f8fc;
}

[data-theme="dark"] .contacts {
  background: var(--surface-light);
}

.contacts__title {
  margin: 0 0 48px;
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  text-align: center;
}

.contacts__grid {
  display: flex;
  justify-content: center;
}

.contacts__info {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: 48px 72px;
  max-width: 960px;
  width: 100%;
}

.contacts__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  min-width: 220px;
}

.contacts__item:last-child {
  flex-basis: 100%;
  display: flex;
  flex-direction: row;
  justify-content: center;
}

.contacts__label {
  font-size: 16px;
  font-weight: 600;
  color: var(--muted-color);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.contacts__link {
  font-size: 26px;
  font-weight: 600;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 12px;
  transition: color 0.2s ease;
}

.contacts__link:hover {
  color: var(--primary-color);
}

.contacts__link svg {
  color: var(--primary-color);
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.contacts__addresses {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.contacts__address-card {
  background: var(--surface-color);
  padding: 24px;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contacts__address-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px var(--shadow-color);
}

.contacts__address-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.contacts__address-header .fi {
  width: 24px;
  height: 18px;
  border-radius: 2px;
}

.contacts__address-title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.contacts__address-text {
  margin: 0;
  font-size: 15px;
  color: var(--muted-color);
  line-height: 1.5;
}

.contacts__map-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.contacts__map-link:hover {
  opacity: 0.8;
}

@media (max-width: 960px) {
  .contacts__info {
    flex-direction: column;
    align-items: center;
    gap: 40px;
  }

  .contacts__item {
    min-width: unset;
    width: 100%;
  }
}

@media (max-width: 640px) {
  .contacts {
    padding: 56px 0;
  }

  .contacts__title {
    margin-bottom: 32px;
  }

  .contacts__link {
    font-size: 20px;
  }
}

/* FAQ Section */
.faq {
  padding: 80px 0;
  background: #ffffff;
}

[data-theme="dark"] .faq {
  background: var(--surface-color);
}

.faq__title {
  margin: 0 0 48px;
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  text-align: center;
}

.faq__grid {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.faq__item {
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  background: var(--surface-light);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.faq__item.is-active {
  border-color: var(--primary-color);
  box-shadow: 0 8px 24px rgba(132, 43, 255, 0.1);
}

.faq__question {
  width: 100%;
  padding: 24px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--text-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-align: left;
  transition: color 0.2s ease;
}

.faq__question::after {
  content: "+";
  font-size: 24px;
  color: var(--primary-color);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq__item.is-active .faq__question::after {
  transform: rotate(45deg);
}

.faq__answer-wrapper {
  height: 0;
  overflow: hidden;
  transition: height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq__answer {
  padding: 0 24px 24px;
  font-size: 16px;
  color: var(--muted-color);
  line-height: 1.6;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.faq__item.is-active .faq__answer {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 640px) {
  .faq {
    padding: 56px 0;
  }
  
  .faq__question {
    padding: 20px;
    font-size: 17px;
  }
  
  .faq__answer {
    padding: 0 20px 20px;
    font-size: 15px;
  }
  
}

/* Mobile font size overrides */
@media (max-width: 768px) {
  body {
    font-size: 12px !important;
  }

  .revenue__title,
  .benefits__title,
  .calculator__title,
  .calculator-form__title,
  .calculator-form__intro-content h2,
  .technology__pretitle,
  .technology__title,
  .cta-section__title,
  .patent__title,
  .tariffs__title,
  .tariff-card__header h3,
  .partnership__title,
  .timeline__title,
  .faq__title,
  .timeline__item-title,
  .calculator-form__legend,
  .modal__title {
    font-size: 18px !important;
  }

  .hero__subtitle,
  .benefit-card__text,
  .calculator__subtitle,
  .calculator-form__subtitle,
  .calculator-form__counter,
  .option-card__text,
  .option-card__text strong,
  .option-card__text small,
  .option-inline span,
  .input-field,
  .input-field span,
  .calculator-results__label,
  .calculator-results__disclaimer,
  .technology__subtitle,
  .technology__list,
  .technology__work-examples-label,
  .cta-section__subtitle,
  .patent__text,
  .patent__form input,
  .patent__slider-label,
  .tariffs__features-list li,
  .tariffs__subtitle,
  .tariff-card__subtitle,
  .tariff-card ul,
  .revenue__text,
  .partnership__list,
  .timeline__item-description,
  .faq__answer,
  .modal__subtitle,
  .modal__form input,
  .cta-section__form input,
  .button:not(.site-header .button):not(.site-footer .button) {
    font-size: 12px !important;
  }

  .hero__image {
    transform: scale(1.05) !important;
    border-radius: 20px;
  }

  .calculator-form__intro-media img {
    border-radius: 20px;
    transform: scale(0.95);
  }
}

/* Hide lightbox on escape key */
@media (prefers-reduced-motion: reduce) {
  .lightbox {
    transition: none;
  }
  
  .lightbox__content {
    transition: none;
  }
  
  .lightbox__image {
    transition: none;
  }
}