/* ---------- Reset & base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-0: #060b16;
  --bg-1: #0a1120;
  --bg-2: #0d1830;
  --panel: #0f1c33;
  --panel-2: #101c2f;
  --border: rgba(120, 170, 255, 0.14);
  --border-strong: rgba(120, 170, 255, 0.28);
  --text-hi: #eef3fb;
  --text-mid: #aab8d1;
  --text-dim: #7c8aa8;
  --accent: #3b9dff;
  --accent-2: #63c7ff;
  --accent-glow: rgba(59, 157, 255, 0.35);
  --red: #7a3838;
  --red-bg: rgba(140, 70, 70, 0.18);
  --red-border: rgba(200, 110, 110, 0.35);
  --blue-bg: rgba(59, 157, 255, 0.12);
  --blue-border: rgba(99, 199, 255, 0.35);
  --font-display: "Segoe UI", "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

html, body {
  background: var(--bg-0);
  color: var(--text-hi);
  font-family: var(--font-display);
  scroll-behavior: smooth;
}

a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; }

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(6, 11, 22, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 18px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-icon {
  width: 26px;
  height: 26px;
  color: var(--accent-2);
  filter: drop-shadow(0 0 6px var(--accent-glow));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--text-mid);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease;
}

.nav-link:hover { color: var(--text-hi); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 100px 40px 120px;
  background:
    radial-gradient(ellipse 900px 500px at 78% 15%, rgba(59, 157, 255, 0.16), transparent 60%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.5;
  background-image:
    linear-gradient(rgba(80, 150, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(80, 150, 255, 0.06) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 900px 700px at 75% 20%, black 10%, transparent 70%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 1.15fr;
  gap: 60px;
  align-items: center;
}

.hero-copy h1 {
  font-size: 3.15rem;
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-hi);
  margin-bottom: 26px;
}

.hero-sub {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--text-mid);
  margin-bottom: 38px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 30px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(180deg, #4aa8ff, #2f7fe0);
  color: #061020;
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-hi);
  border: 1px solid var(--border-strong);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--accent-2);
}

/* ---------- App mockup ---------- */
.hero-visual { position: relative; }

.app-window {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255,255,255,0.02) inset;
  overflow: hidden;
}

.app-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  gap: 16px;
}

.app-topbar-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
}

.app-logo { width: 18px; height: 18px; color: var(--accent-2); }

.app-search {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  color: var(--text-dim);
  font-size: 0.82rem;
}

.app-topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.icon-chip {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 7px;
}

.icon-dot { opacity: 0.8; }

.avatar {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ffb199, #c96a5a);
  border: 1px solid var(--border);
}
.avatar.small { width: 20px; height: 20px; }

.app-body { padding: 18px; }

.app-body-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.branch-tag {
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--blue-bg);
  border: 1px solid var(--blue-border);
  color: var(--accent-2);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 999px;
}

.branch-title {
  font-size: 0.85rem;
  color: var(--text-mid);
  flex: 1;
}

.btn-mini {
  background: var(--accent);
  color: #061020;
  border: none;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 6px;
}

.app-panels {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 14px;
}

.code-panel {
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.code-panel-head {
  display: flex;
  justify-content: space-between;
  padding: 8px 12px;
  font-size: 0.75rem;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}

.code-icons { letter-spacing: 3px; }

.code-lines {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.75;
  padding: 12px;
  color: #b9c6de;
  white-space: pre-wrap;
  word-break: break-word;
}

.code-lines .ln { color: #4a5875; margin-right: 10px; }
.code-lines .kw { color: #c792ea; }
.code-lines .fn { color: #63c7ff; }
.code-lines .str { color: #a3e3a3; }
.code-lines .comment { color: #5c6b8a; font-style: italic; }

.results-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-card {
  border-radius: 10px;
  padding: 11px 13px;
  font-size: 0.72rem;
  line-height: 1.55;
  border: 1px solid;
}

.result-card.result-blue {
  background: var(--blue-bg);
  border-color: var(--blue-border);
  color: #d7e9ff;
}

.result-card.result-red {
  background: var(--red-bg);
  border-color: var(--red-border);
  color: #f0dcdc;
}

.result-card.small { padding: 9px 13px; font-size: 0.68rem; }

.result-head {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.76rem;
  margin-bottom: 6px;
}

.model-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
}

.result-actions {
  display: flex;
  gap: 8px;
  margin-top: 2px;
}

.pill {
  flex: 1;
  border: 1px solid;
  border-radius: 8px;
  padding: 7px 0;
  font-size: 0.72rem;
  font-weight: 700;
}

.pill-blue {
  background: var(--blue-bg);
  border-color: var(--blue-border);
  color: var(--accent-2);
}

.pill-red {
  background: var(--red-bg);
  border-color: var(--red-border);
  color: #f0b6b6;
}

.app-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 0.72rem;
  color: var(--text-dim);
}

.footer-chip {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 7px;
}

/* ---------- Features ---------- */
.features {
  background: var(--bg-0);
  padding: 90px 40px 110px;
  border-top: 1px solid var(--border);
}

.features-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.features h2 {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}

.features-kicker {
  color: var(--text-dim);
  font-size: 1rem;
  margin-bottom: 44px;
  max-width: 560px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 26px 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.feature-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.feature-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--blue-bg);
  border: 1px solid var(--blue-border);
  color: var(--accent-2);
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-mid);
}

.demo-cta {
  padding: 36px 40px 80px;
  background: var(--bg-0);
}

.demo-cta-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  background: linear-gradient(135deg, var(--panel), rgba(59,157,255,.08));
}

.demo-cta h2 { margin: 5px 0 9px; font-size: 1.7rem; }
.demo-cta p { color: var(--text-mid); line-height: 1.55; }
.demo-kicker { color: var(--accent-2) !important; font-size: .75rem; font-weight: 800; letter-spacing: .08em; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 40px;
  background: var(--bg-0);
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  color: var(--text-dim);
  font-size: 0.85rem;
  text-align: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .hero-inner { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .app-panels { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav-inner { padding: 14px 16px; }
  .nav-links { display: flex; gap: 0; }
  .nav-links .nav-link:not(:last-child) { display: none; }
  .nav-links .nav-link:last-child { display: inline-flex; padding: 10px 14px; border: 1px solid var(--blue-border); border-radius: 9px; background: var(--blue-bg); color: var(--accent-2); font-weight: 700; }
  .hero-copy h1 { font-size: 2.2rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero { padding: 60px 20px 80px; }
  .features { padding: 60px 20px 80px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .demo-cta { padding: 0 20px 60px; }
  .demo-cta-inner { padding: 24px; align-items: stretch; flex-direction: column; }
  .demo-cta-inner .btn { width: 100%; }
}