/* ============ Design tokens ============ */
:root {
  --bg: #07070d;
  --bg-soft: #0c0c16;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-2: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f4f4f8;
  --text-dim: #a3a3b5;
  --text-faint: #6d6d82;
  --accent-a: #7c6cff;
  --accent-b: #23d5ff;
  --accent-c: #ff5ce1;
  --grad: linear-gradient(100deg, #7c6cff 0%, #23d5ff 100%);
  --grad-warm: linear-gradient(100deg, #ff5ce1 0%, #7c6cff 100%);
  --radius: 16px;
  --radius-lg: 24px;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --nav-h: 68px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
h1, h2, h3 { font-family: var(--font-display); letter-spacing: -0.02em; line-height: 1.1; }

/* ============ Background layers ============ */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -3;
  background-image:
    linear-gradient(rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 0%, transparent 75%);
}

.bg-glow {
  position: fixed;
  z-index: -2;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.5;
  pointer-events: none;
}
.bg-glow--a {
  width: 620px; height: 620px;
  top: -220px; left: 50%;
  transform: translateX(-72%);
  background: radial-gradient(circle, rgba(124,108,255,0.55), transparent 65%);
}
.bg-glow--b {
  width: 560px; height: 560px;
  top: -160px; left: 50%;
  transform: translateX(-8%);
  background: radial-gradient(circle, rgba(35,213,255,0.42), transparent 65%);
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 11px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--lg { padding: 14px 26px; font-size: 1.02rem; border-radius: 13px; }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--grad);
  color: #07070d;
  box-shadow: 0 8px 30px rgba(124,108,255,0.35);
}
.btn--primary:hover { box-shadow: 0 12px 40px rgba(124,108,255,0.5); }

.btn--ghost {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
.btn--ghost:hover { background: var(--surface-2); border-color: var(--border-strong); }

.btn--outline {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}
.btn--outline:hover { border-color: var(--accent-a); background: rgba(124,108,255,0.08); }

/* ============ Navigation ============ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(7,7,13,0.7);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, border-color 0.3s ease;
}
.nav__inner {
  max-width: 1160px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-display); }
.brand__mark { display: inline-flex; }
.brand__name { font-weight: 700; font-size: 1.15rem; letter-spacing: 0.02em; }

.nav__links { display: flex; gap: 28px; }
.nav__links a {
  color: var(--text-dim);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s ease;
}
.nav__links a:hover { color: var(--text); }

.nav__cta { display: flex; align-items: center; gap: 12px; }
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav__toggle span {
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  padding: calc(var(--nav-h) + 88px) 24px 80px;
  position: relative;
}
.hero__inner {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}
.hero__eyebrow { margin-bottom: 26px; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-dim);
}
.pill::before { content: ""; }

.hero__title {
  font-size: clamp(2.6rem, 6.4vw, 4.6rem);
  font-weight: 700;
  margin-bottom: 24px;
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__sub {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 auto 36px;
}
.hero__actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 56px; }

/* Console */
.hero__console {
  max-width: 640px;
  margin: 0 auto;
  text-align: left;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(10,10,20,0.7);
  box-shadow: 0 30px 80px rgba(0,0,0,0.55);
  font-family: var(--font-mono);
  font-size: 0.88rem;
}
.console__bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot--r { background: #ff5f57; }
.dot--y { background: #febc2e; }
.dot--g { background: #28c840; }
.console__title { margin-left: 8px; color: var(--text-faint); font-size: 0.78rem; }
.console__body { padding: 18px 20px; line-height: 1.9; }
.console__body p { margin-bottom: 6px; }
.c-prompt { color: var(--accent-b); }
.c-user { color: var(--text); }
.c-tag {
  color: var(--accent-b);
  background: rgba(35,213,255,0.1);
  border: 1px solid rgba(35,213,255,0.25);
  padding: 1px 7px;
  border-radius: 6px;
  font-size: 0.76rem;
}
.c-dim { color: var(--text-faint); }
.c-answer { color: var(--text-dim); }
.c-cursor { color: var(--accent-a); animation: blink 1.1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ============ Stats ============ */
.stats {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.stats__inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 40px 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat__num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat__label { color: var(--text-faint); font-size: 0.9rem; }

/* ============ Sections ============ */
.section { padding: 96px 24px; max-width: 1160px; margin: 0 auto; }
.section__head { text-align: center; margin-bottom: 56px; }
.section__kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-b);
  margin-bottom: 14px;
}
.section__head h2 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  margin-bottom: 14px;
}
.section__lede { color: var(--text-dim); font-size: 1.05rem; max-width: 540px; margin: 0 auto; }

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-3px); background: var(--surface-2); }
.card__icon {
  font-size: 1.6rem;
  width: 48px; height: 48px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(124,108,255,0.12);
  color: var(--accent-a);
  margin-bottom: 18px;
}
.card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: 0.95rem; }

/* ============ Models ============ */
.model-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.model {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.model:hover { border-color: var(--border-strong); background: var(--surface-2); }
.model strong { font-family: var(--font-display); font-size: 1.05rem; }
.model em { font-style: normal; color: var(--text-faint); font-size: 0.82rem; }
.model__logo {
  width: 34px; height: 34px;
  border-radius: 8px;
  margin-bottom: 10px;
  background: var(--grad);
  position: relative;
  opacity: 0.9;
}
.model__logo--openai { background: linear-gradient(135deg, #10a37f, #0d8a6a); }
.model__logo--claude { background: linear-gradient(135deg, #d97757, #b04a2f); }
.model__logo--gemini { background: linear-gradient(135deg, #4285f4, #a142f4); }
.model__logo--llama { background: linear-gradient(135deg, #6366f1, #22d3ee); }
.model__logo--mistral { background: linear-gradient(135deg, #ffb400, #ff7a00); }
.model__logo--deepseek { background: linear-gradient(135deg, #4d6bfe, #4d6bfe); }
.model__logo--qwen { background: linear-gradient(135deg, #c026d3, #7c3aed); }
.model__logo--plus { background: var(--surface-2); border: 1px dashed var(--border-strong); background: transparent; }
.model__logo--plus::after { content: "+"; position: absolute; inset: 0; display: grid; place-items: center; color: var(--text-dim); font-size: 1.2rem; font-weight: 700; }

/* ============ Pricing ============ */
.billing-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 28px;
  padding: 4px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
}
.billing-toggle__btn {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 9px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}
.billing-toggle__btn.is-active { background: var(--surface-2); color: var(--text); }
.billing-toggle__save {
  color: var(--accent-b);
  font-size: 0.75rem;
  font-weight: 700;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}
.plan {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.plan:hover { border-color: var(--border-strong); transform: translateY(-4px); }
.plan--popular {
  background: linear-gradient(180deg, rgba(124,108,255,0.12), rgba(35,213,255,0.05));
  border-color: rgba(124,108,255,0.5);
  box-shadow: 0 20px 60px rgba(124,108,255,0.18);
}
.plan__badge {
  position: absolute;
  top: -13px; left: 50%;
  transform: translateX(-50%);
  background: var(--grad);
  color: #07070d;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 999px;
  white-space: nowrap;
}
.plan__name { font-size: 1.25rem; margin-bottom: 4px; }
.plan__desc { color: var(--text-faint); font-size: 0.9rem; margin-bottom: 22px; }
.plan__price { display: flex; align-items: baseline; gap: 6px; margin-bottom: 2px; }
.plan__amount {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}
.plan__amount--custom { font-size: 2rem; }
.plan__period { color: var(--text-faint); font-size: 1rem; }
.plan__annual-note { color: var(--text-faint); font-size: 0.78rem; margin-bottom: 24px; min-height: 1.2em; }
.plan__features { margin-bottom: 30px; flex: 1; }
.plan__features li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 11px;
  color: var(--text-dim);
  font-size: 0.93rem;
}
.plan__features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent-b);
  font-weight: 700;
}

/* ============ FAQ ============ */
.faq { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq__item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.faq__item:hover { border-color: var(--border-strong); }
.faq__item summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1.02rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--accent-a);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}
.faq__item[open] summary::after { transform: rotate(45deg); }
.faq__body { padding: 0 24px 22px; }
.faq__body p { color: var(--text-dim); font-size: 0.95rem; }

/* ============ CTA ============ */
.cta { padding: 0 24px 96px; }
.cta__inner {
  max-width: 1160px;
  margin: 0 auto;
  text-align: center;
  padding: 80px 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(124,108,255,0.14), rgba(35,213,255,0.06));
  border: 1px solid rgba(124,108,255,0.3);
}
.cta__inner h2 { font-size: clamp(1.9rem, 4.6vw, 3rem); margin-bottom: 16px; }
.cta__inner p { color: var(--text-dim); margin-bottom: 34px; font-size: 1.05rem; }
.cta__actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ============ Footer ============ */
.footer { border-top: 1px solid var(--border); background: var(--bg-soft); }
.footer__inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 60px 24px 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer__brand p { color: var(--text-faint); margin-top: 12px; font-size: 0.9rem; }
.footer__col { display: flex; flex-direction: column; gap: 12px; }
.footer__col h4 {
  font-family: var(--font-body);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin-bottom: 4px;
}
.footer__col a { color: var(--text-dim); font-size: 0.92rem; transition: color 0.15s ease; }
.footer__col a:hover { color: var(--text); }
.footer__legal {
  border-top: 1px solid var(--border);
  padding: 22px 24px;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.82rem;
}

/* ============ Reveal animation ============ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .model-grid { grid-template-columns: repeat(3, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(7,7,13,0.97);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 20px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }
  .nav__links.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .nav__links a { padding: 13px 0; border-bottom: 1px solid var(--border); }
  .nav__links a:last-child { border-bottom: none; }
  .nav__cta .btn--ghost { display: none; }
  .nav__toggle { display: flex; }

  .stats__inner { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .cards { grid-template-columns: 1fr; }
  .model-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .hero { padding-top: calc(var(--nav-h) + 56px); }
  .section { padding: 64px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .c-cursor { animation: none; }
}