:root {
  --primary: #7cb9a8;
  --primary-light: #a8d4c8;
  --primary-dark: #5a8c7d;
  --on-primary: #ffffff;
  --primary-container: #e6f4f1;
  --on-primary-container: #00382e;
  --secondary: #ffb7b2;
  --secondary-container: #ffdad6;
  --tertiary: #a7c7e7;
  --tertiary-container: #d1e4ff;
  --quaternary: #ffe0b2;
  --on-surface: #191c1b;
  --on-surface-variant: #404946;
  --surface: #ffffff;
  --surface-dim: #f8fbf9;
  --surface-container: #eceeeb;
  --surface-container-high: #e6e8e6;
  --surface-container-highest: #e1e3e1;
  --outline: #707975;
  --outline-variant: #bfc9c4;
  --text-tertiary: #9e9e9e;
  --error: #ba1a1a;
  --background: #ffffff;
  --shadow: rgba(0, 0, 0, 0.05);
  --shadow-md: rgba(0, 0, 0, 0.08);
  --radius-s: 8px;
  --radius-m: 12px;
  --radius-l: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --spacing-xxs: 2px;
  --spacing-xs: 4px;
  --spacing-s: 8px;
  --spacing-m: 12px;
  --spacing-l: 16px;
  --spacing-xl: 20px;
  --spacing-xxl: 24px;
  --spacing-xxxl: 32px;
  --spacing-huge: 40px;
  --spacing-giant: 48px;
  --spacing-massive: 64px;
  --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, sans-serif;
  --transition-fast: 200ms ease;
  --transition-normal: 300ms ease;
  --transition-moderate: 400ms ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-system);
  font-size: 16px;
  line-height: 1.5;
  color: var(--on-surface);
  background-color: var(--background);
  overflow-x: hidden;
}

a {
  color: var(--primary-dark);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--spacing-l);
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--outline-variant);
  transition: box-shadow var(--transition-normal);
}

.header.scrolled {
  box-shadow: 0 2px 16px var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--spacing-giant);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-m);
}

.header-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-s);
  object-fit: cover;
}

.header-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: -0.3px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-m);
}

.lang-switcher {
  display: flex;
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 1px solid var(--outline-variant);
}

.lang-switcher a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xs) var(--spacing-m);
  font-size: 13px;
  font-weight: 600;
  color: var(--on-surface-variant);
  background: transparent;
  transition: all var(--transition-fast);
  min-width: 36px;
}

.lang-switcher a:hover {
  background: var(--surface-container);
  color: var(--on-surface);
}

.lang-switcher a.active {
  background: var(--primary);
  color: var(--on-primary);
}

.lang-switcher a.active:hover {
  background: var(--primary-dark);
  color: var(--on-primary);
}

.hero {
  padding-top: calc(var(--spacing-giant) + var(--spacing-massive));
  padding-bottom: var(--spacing-massive);
  text-align: center;
  background: linear-gradient(
    180deg,
    var(--primary-container) 0%,
    var(--background) 100%
  );
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
      circle at 30% 40%,
      rgba(124, 185, 168, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 70% 60%,
      rgba(167, 199, 231, 0.06) 0%,
      transparent 50%
    );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-icon-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 120px;
  height: 120px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(124, 185, 168, 0.2), 0 2px 8px var(--shadow);
  margin-bottom: var(--spacing-xxl);
  animation: floatIcon 6s ease-in-out infinite;
}

@keyframes floatIcon {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.hero-icon {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero h1 {
  font-size: 40px;
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: var(--spacing-m);
}

.hero .tagline {
  font-size: 18px;
  color: var(--on-surface-variant);
  line-height: 1.6;
  max-width: 560px;
  margin: 0 auto var(--spacing-xxl);
}

.hero-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-m);
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-m);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  color: var(--on-surface-variant);
  box-shadow: 0 1px 4px var(--shadow);
}

.badge svg {
  width: 14px;
  height: 14px;
}

.badge--primary {
  background: var(--primary-container);
  border-color: var(--primary-light);
  color: var(--on-primary-container);
}

.section {
  padding: var(--spacing-massive) 0;
}

.section:nth-child(even) {
  background: var(--surface-dim);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xxxl);
}

.section-header h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: -0.3px;
  margin-bottom: var(--spacing-s);
}

.section-header p {
  font-size: 16px;
  color: var(--on-surface-variant);
  max-width: 480px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-l);
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-l);
  padding: var(--spacing-xxl);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--shadow-md);
  border-color: var(--primary-light);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-m);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-l);
  color: var(--primary-dark);
  background: var(--primary-container);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--on-surface);
  margin-bottom: var(--spacing-s);
}

.feature-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--on-surface-variant);
}

.audience-section {
  background: var(--primary-container);
  border-radius: var(--radius-l);
  padding: var(--spacing-xxxl);
}

.audience-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-l);
  margin-top: var(--spacing-xl);
}

.audience-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-m);
  font-size: 15px;
  color: var(--on-primary-container);
  line-height: 1.5;
}

.audience-list li svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--primary-dark);
  margin-top: 2px;
}

.howto-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xxl);
  margin-top: var(--spacing-xxxl);
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: var(--on-primary);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--spacing-l);
  box-shadow: 0 4px 12px rgba(124, 185, 168, 0.3);
}

.step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--on-surface);
  margin-bottom: var(--spacing-s);
}

.step p {
  font-size: 14px;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

.highlights {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xxxl);
  flex-wrap: wrap;
  margin-top: var(--spacing-xxxl);
}

.highlight {
  text-align: center;
}

.highlight-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-m);
  background: var(--surface-container);
  color: var(--primary-dark);
}

.highlight-icon svg {
  width: 24px;
  height: 24px;
}

.highlight h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--on-surface);
  margin-bottom: var(--spacing-xs);
}

.highlight p {
  font-size: 13px;
  color: var(--on-surface-variant);
}

.footer {
  background: var(--surface-container);
  border-top: 1px solid var(--outline-variant);
  padding: var(--spacing-xxxl) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-l);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-m);
}

.footer-brand-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-s);
  object-fit: cover;
}

.footer-brand span {
  font-size: 16px;
  font-weight: 600;
  color: var(--on-surface);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.footer-links a {
  font-size: 14px;
  color: var(--on-surface-variant);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary-dark);
}

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: var(--spacing-l);
  padding-top: var(--spacing-l);
  border-top: 1px solid var(--outline-variant);
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-moderate),
    transform var(--transition-moderate);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 28px;
  }
  .hero .tagline {
    font-size: 16px;
  }
  .hero-icon-wrapper {
    width: 96px;
    height: 96px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .howto-steps {
    grid-template-columns: 1fr;
    gap: var(--spacing-xxl);
  }
  .highlights {
    gap: var(--spacing-xxl);
  }
  .section-header h2 {
    font-size: 24px;
  }
  .audience-section {
    padding: var(--spacing-xxl);
  }
  .audience-list {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
  .lang-switcher {
    display: flex;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-m);
  }
  .hero {
    padding-top: calc(var(--spacing-giant) + var(--spacing-xxxl));
    padding-bottom: var(--spacing-xxxl);
  }
  .hero h1 {
    font-size: 24px;
  }
  .hero-badges {
    gap: var(--spacing-s);
  }
  .badge {
    font-size: 12px;
  }
  .feature-card {
    padding: var(--spacing-l);
  }
}

.redirect-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-dim);
}

.redirect-content {
  text-align: center;
}

.redirect-content .spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--outline-variant);
  border-top-color: var(--primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
  margin: 0 auto var(--spacing-l);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.redirect-content p {
  font-size: 14px;
  color: var(--on-surface-variant);
}

.privacy-page {
  padding-top: calc(var(--spacing-giant) + var(--spacing-xxxl));
  min-height: 100vh;
}

.privacy-page .container {
  max-width: 720px;
}

.privacy-page h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: var(--spacing-xxl);
  color: var(--on-surface);
}

.privacy-page h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--on-surface);
}

.privacy-updated {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-xxxl);
}

.privacy-intro {
  font-size: 15px;
  color: var(--on-surface-variant);
  line-height: 1.7;
  margin-bottom: var(--spacing-xxxl);
  padding: var(--spacing-l) var(--spacing-xl);
  background: var(--primary-container);
  border-radius: var(--radius-m);
}

.privacy-section {
  margin-bottom: var(--spacing-xxxl);
}

.privacy-section h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: var(--spacing-m);
  padding-bottom: var(--spacing-s);
  border-bottom: 2px solid var(--primary-light);
}

.privacy-section h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--on-surface);
  margin-top: var(--spacing-l);
  margin-bottom: var(--spacing-s);
}

.privacy-section p {
  font-size: 15px;
  color: var(--on-surface-variant);
  line-height: 1.8;
  margin-bottom: var(--spacing-m);
  text-align: left;
}

.privacy-section ul {
  margin: 0 0 var(--spacing-m) var(--spacing-l);
  list-style: none;
}

.privacy-section ul li {
  font-size: 15px;
  color: var(--on-surface-variant);
  line-height: 1.8;
  padding-left: var(--spacing-m);
  position: relative;
}

.privacy-section ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

.privacy-section a {
  color: var(--primary-dark);
  font-weight: 500;
}

.privacy-section a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.privacy-note {
  font-size: 13px;
  color: var(--on-surface-variant);
  line-height: 1.7;
  padding: var(--spacing-l);
  background: var(--surface-container);
  border-radius: var(--radius-m);
  border-left: 3px solid var(--primary);
  margin-top: var(--spacing-l);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 14px;
  color: var(--primary-dark);
  font-weight: 500;
  margin-bottom: var(--spacing-xxl);
}

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