@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600;700&family=Source+Serif+4:opsz,wght@8..60,400;600&display=swap');

:root {
  --bg: #0b0f14;
  --bg-glow: #13222c;
  --panel: #121a22;
  --panel-strong: #15212b;
  --text: #f4f7fb;
  --muted: #a6b3c2;
  --accent: #56f2d0;
  --accent-strong: #18c7a0;
  --warm: #ffb357;
  --line: rgba(255, 255, 255, 0.08);
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Space Grotesk', sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(86, 242, 208, 0.18), transparent 60%),
    radial-gradient(900px 500px at 80% 0%, rgba(255, 179, 87, 0.15), transparent 60%),
    linear-gradient(140deg, #0b0f14 0%, #0e141b 40%, #0b1218 100%);
  color: var(--text);
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 3px 3px;
  opacity: 0.2;
  pointer-events: none;
  mix-blend-mode: screen;
}

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

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(11, 15, 20, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  gap: 20px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 700;
  letter-spacing: 0.4px;
}

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

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.35);
}

.nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
  color: var(--muted);
}

.nav-links a {
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
  border-color: var(--accent);
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.04);
}

.toggle-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 12px;
  padding: 6px 12px;
  cursor: pointer;
}

.toggle-btn.active {
  color: #021716;
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  padding: 80px 0 50px;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.05;
  margin: 0 0 18px;
}

.hero-copy p {
  font-size: 18px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0 0 20px;
}

.hero-note {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.72);
  margin: -6px 0 22px;
}

.hero-copy strong {
  color: var(--text);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-strong));
  color: #001b18;
  box-shadow: 0 12px 30px rgba(86, 242, 208, 0.35);
}

.btn.secondary {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text);
}

.btn:hover {
  transform: translateY(-2px);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
}

.hero-card {
  background: linear-gradient(160deg, rgba(21, 33, 43, 0.9), rgba(12, 18, 25, 0.9));
  border-radius: 26px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 28px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.hero-card::after {
  content: '';
  position: absolute;
  inset: -60% -20% auto auto;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(86, 242, 208, 0.25), transparent 70%);
  opacity: 0.7;
}

.hero-card .card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.badge {
  background: rgba(255, 255, 255, 0.08);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--muted);
}

.wave {
  display: flex;
  gap: 10px;
  margin: 18px 0;
  position: relative;
  z-index: 1;
}

.wave span {
  width: 10px;
  height: 40px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent), var(--warm));
  animation: bounce 1.2s ease-in-out infinite;
}

.wave span:nth-child(2) { animation-delay: 0.1s; }
.wave span:nth-child(3) { animation-delay: 0.2s; }
.wave span:nth-child(4) { animation-delay: 0.3s; }
.wave span:nth-child(5) { animation-delay: 0.4s; }

.transcript {
  font-size: 15px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  line-height: 1.5;
  position: relative;
  z-index: 1;
}

.mini-note {
  margin-top: 12px;
  font-size: 12px;
  color: var(--muted);
  position: relative;
  z-index: 1;
}

.section {
  padding: 60px 0;
}

.section h2 {
  font-size: clamp(24px, 3vw, 36px);
  margin: 0 0 16px;
}

.section p {
  color: var(--muted);
  margin: 0 0 24px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  background: var(--panel);
  border-radius: 18px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 170px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.comparison {
  overflow-x: auto;
}

.comparison table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

.comparison th,
.comparison td {
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 14px;
  text-align: left;
  font-size: 14px;
}

.comparison th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
}

.highlight-row {
  background: rgba(86, 242, 208, 0.08);
}

.note {
  margin-top: 12px;
  font-size: 12px;
  color: var(--muted);
}

.callout {
  background: linear-gradient(140deg, rgba(86, 242, 208, 0.16), rgba(21, 33, 43, 0.9));
  border-radius: 20px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.callout p {
  margin: 0 0 16px;
  color: var(--text);
}

.callout .soft {
  color: var(--muted);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
  color: var(--muted);
}

.feature-list li {
  padding-left: 18px;
  position: relative;
  line-height: 1.6;
}

.feature-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.steps-grid {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.step-card {
  background: linear-gradient(160deg, rgba(21, 33, 43, 0.95), rgba(13, 20, 27, 0.9));
  border-radius: 20px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 210px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.25);
}

.step-card * {
  writing-mode: horizontal-tb;
  text-orientation: mixed;
}

.step-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.step-index {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  background: rgba(86, 242, 208, 0.16);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex: 0 0 auto;
}

.step-title {
  font-size: 18px;
  font-weight: 600;
}

.step-title .lang {
  display: block;
}

.step-body p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.step-body .lang {
  display: block;
}

.llm-grid {
  margin-top: 20px;
}

.use-cases {
  margin-top: 26px;
}

.use-cases-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 14px;
}

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

.use-case {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 16px;
}

.use-case h4 {
  margin: 0 0 8px;
  font-size: 15px;
}

.use-case p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.llm-note {
  margin-top: 24px;
}

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

footer {
  padding: 40px 0 60px;
  color: var(--muted);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: var(--delay, 0s);
}

body.ready .reveal {
  opacity: 1;
  transform: translateY(0);
}

@keyframes bounce {
  0%, 100% {
    transform: scaleY(0.4);
  }
  50% {
    transform: scaleY(1.1);
  }
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }
}

@media (max-width: 720px) {
  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}