/* ============================================
   Instant Word Translator — Liquid Glass
   ============================================ */

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

:root {
  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-strong: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-border-strong: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.08);

  /* Colors */
  --accent: #6366f1;
  --accent-soft: rgba(99, 102, 241, 0.25);
  --text: #f1f5f9;
  --text-muted: rgba(241, 245, 249, 0.75);
  --text-dark: #0f172a;
  --blur: 24px;
  --radius: 20px;
  --radius-sm: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  background: #0f172a;
}

/* Animated mesh / gradient background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(99, 102, 241, 0.35), transparent 50%),
    radial-gradient(ellipse 80% 50% at 90% 50%, rgba(139, 92, 246, 0.2), transparent 45%),
    radial-gradient(ellipse 60% 80% at 10% 80%, rgba(59, 130, 246, 0.15), transparent 45%),
    linear-gradient(180deg, #0f172a 0%, #1e293b 40%, #0f172a 100%);
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.03) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(255,255,255,0.02) 0%, transparent 40%);
  pointer-events: none;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ——— Language Switcher (glass pill) ——— */
.lang-switcher {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-highlight);
}

.lang-btn {
  padding: 10px 20px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  transition: all 0.25s ease;
  color: var(--text-muted);
}

.lang-btn:hover {
  color: var(--text);
  background: var(--glass-bg-strong);
}

.lang-btn.active {
  background: var(--glass-bg-strong);
  color: var(--text);
  border: 1px solid var(--glass-border-strong);
  box-shadow: var(--glass-highlight);
}

/* ——— Hero Section ——— */
.hero {
  padding: 140px 24px 100px;
  text-align: center;
  position: relative;
}

.hero .container {
  max-width: 720px;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 48px 40px 56px;
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-highlight);
}

.hero-icon {
  margin-bottom: 28px;
  animation: float 4s ease-in-out infinite;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-icon svg,
.hero-icon-img {
  filter: drop-shadow(0 8px 24px rgba(99, 102, 241, 0.35));
}

.hero-icon-img {
  display: block;
  border-radius: 24px;
}

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

.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text);
}

.hero-subtitle {
  font-size: 1.125rem;
  margin-bottom: 24px;
  color: var(--text-muted);
  font-weight: 400;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.key-facts {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 16px;
  margin-bottom: 32px;
}

.key-fact {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 14px;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  white-space: nowrap;
}

.key-fact:not(:last-child)::after {
  content: none;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  transition: all 0.25s ease;
  display: inline-block;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: white;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4), var(--glass-highlight);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(99, 102, 241, 0.5);
  background: #818cf8;
}

.btn-secondary {
  background: var(--glass-bg-strong);
  color: var(--text);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border-strong);
  box-shadow: var(--glass-highlight);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.25);
}

/* ——— Sections ——— */
section {
  padding: 88px 24px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  text-align: center;
  margin-bottom: 48px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

/* ——— Features (glass cards) ——— */
.features {
  padding-top: 64px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 32px 28px;
  border-radius: var(--radius);
  text-align: center;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-highlight);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--glass-border-strong);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2), var(--glass-highlight);
  background: var(--glass-bg-strong);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
  line-height: 1;
  filter: grayscale(0.2);
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
  font-weight: 600;
  color: var(--text);
}

.feature-description {
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* ——— How It Works (glass steps) ——— */
.how-it-works {
  padding-top: 64px;
}

.steps {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 32px;
  max-width: 960px;
  margin: 0 auto;
}

.step {
  flex: 1;
  min-width: 260px;
  max-width: 320px;
  text-align: center;
  padding: 36px 28px;
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-highlight);
  transition: all 0.3s ease;
}

.step:hover {
  border-color: var(--glass-border-strong);
  background: var(--glass-bg-strong);
  transform: translateY(-2px);
}

.step-number {
  width: 56px;
  height: 56px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 20px;
  box-shadow: var(--glass-highlight);
}

.step-title {
  font-size: 1.2rem;
  margin-bottom: 12px;
  font-weight: 600;
  color: var(--text);
}

.step-description {
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* ——— Thematic blocks (fun facts, who it's for) ——— */
.thematic {
  padding-top: 48px;
  padding-bottom: 64px;
}

.thematic-title {
  margin-bottom: 32px;
}

.thematic-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  max-width: 1000px;
  margin: 0 auto 40px;
}

.thematic-card {
  padding: 24px 22px;
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-highlight);
  transition: all 0.3s ease;
  text-align: left;
}

.thematic-card:hover {
  border-color: var(--glass-border-strong);
  background: var(--glass-bg-strong);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15), var(--glass-highlight);
}

.thematic-emoji {
  font-size: 2rem;
  display: block;
  margin-bottom: 12px;
  line-height: 1;
}

.thematic-text {
  color: var(--text-muted);
  line-height: 1.65;
  font-size: 0.95rem;
  margin: 0;
}

.thematic-for {
  text-align: center;
  margin-bottom: 32px;
}

.thematic-for-label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.thematic-for-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 14px;
}

.thematic-pill {
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  color: var(--text);
  transition: all 0.25s ease;
}

.thematic-pill:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
  transform: scale(1.02);
}

.thematic-cta {
  text-align: center;
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.08));
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.thematic-cta-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0;
  font-style: italic;
}

/* ——— Workflow (popup & word input) ——— */
.workflow {
  padding-top: 64px;
}

.workflow-steps {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.workflow-step {
  padding: 28px 32px;
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-highlight);
  display: flex;
  gap: 24px;
  align-items: flex-start;
  text-align: left;
  transition: all 0.3s ease;
}

.workflow-step:hover {
  border-color: var(--glass-border-strong);
  background: var(--glass-bg-strong);
}

.workflow-num {
  width: 48px;
  height: 48px;
  min-width: 48px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
}

.workflow-body {
  flex: 1;
  min-width: 0;
}

.workflow-heading {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.workflow-text {
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.95rem;
  margin: 0;
}

/* ——— Languages (glass pills) ——— */
.languages {
  padding-top: 64px;
}

.languages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
}

.language-item {
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 1rem;
  font-weight: 500;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-highlight);
  transition: all 0.25s ease;
  color: var(--text);
}

.language-item:hover {
  transform: translateY(-2px);
  border-color: var(--glass-border-strong);
  background: var(--glass-bg-strong);
}

/* ——— Footer (glass bar) ——— */
.footer {
  padding: 40px 24px;
  text-align: center;
  margin-top: 24px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  border-bottom: none;
  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.12), var(--glass-highlight);
}

.footer-text {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--text-muted);
}

.footer-collaboration {
  font-size: 0.9rem;
  margin-bottom: 12px;
  color: var(--text-muted);
}

.footer-partner-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  margin-left: 4px;
  transition: color 0.2s;
}

.footer-partner-link:hover {
  color: #818cf8;
  text-decoration: underline;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--text);
  text-decoration: underline;
}

.footer-links span {
  color: var(--text-muted);
  opacity: 0.6;
}

/* ——— Responsive ——— */
@media (max-width: 768px) {
  .hero {
    padding: 100px 16px 64px;
  }

  .hero-content {
    padding: 36px 24px 44px;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.5rem;
    margin-bottom: 32px;
  }

  section {
    padding: 56px 16px;
  }

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

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

  .workflow-step {
    flex-direction: column;
    text-align: center;
    padding: 24px 20px;
  }

  .workflow-num {
    margin: 0 auto;
  }

  .step {
    max-width: 100%;
  }

  .thematic-facts {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .thematic-for-pills {
    gap: 8px 12px;
  }

  .lang-switcher {
    top: 12px;
    right: 12px;
  }

  .lang-btn {
    padding: 8px 14px;
    font-size: 13px;
  }
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  .hero-icon,
  .feature-card:hover,
  .step:hover,
  .language-item:hover,
  .thematic-card:hover,
  .thematic-pill:hover,
  .btn-primary:hover,
  .btn-secondary:hover {
    animation: none;
    transform: none;
  }
}