:root {
  --bg: #070709;
  --surface: rgba(18, 18, 22, 0.72);
  --surface-2: rgba(26, 26, 32, 0.78);
  --line: rgba(255, 255, 255, 0.09);
  --text: #f4f4f5;
  --muted: #a1a1aa;
  --soft: #71717a;
  --white: #ffffff;
  --black: #09090b;
  --violet: #a78bfa;
  --amber: #ffae5c;
  --cyan: #5fd3e8;
  --rose: #fb7185;
  --green: #22c55e;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
  --radius: 28px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  user-select: none;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 16% 2%, rgba(167,139,250,0.10), transparent 30rem),
    radial-gradient(circle at 82% 10%, rgba(255,174,92,0.08), transparent 32rem),
    linear-gradient(180deg, #08080a 0%, #0d0d10 44%, #070709 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  overflow-x: hidden;
}

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

/* ===== Loader + fade-in ===== */
.app-hidden {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 700ms ease, transform 700ms ease;
}
.app-visible { opacity: 1; transform: translateY(0); }

#siteLoader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: radial-gradient(1200px 800px at 50% 40%, rgba(167,139,250,0.06), rgba(5,5,5,1) 55%);
  display: grid;
  place-items: center;
  overflow: hidden;
  transition: opacity 650ms ease, visibility 650ms ease;
}
#siteLoader.loader-out { opacity: 0; visibility: hidden; }
.loader-inner { display: grid; place-items: center; gap: 18px; }
.loader-mark { animation: loaderFloat 6s ease-in-out infinite; }
@keyframes loaderFloat { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.loader-svg { display: block; }
.spin { transform-origin: 60px 60px; animation: spin 1.35s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.orbit { transform-origin: 60px 60px; animation: orbit 1.05s ease-in-out infinite alternate; }
@keyframes orbit { from { transform: rotate(-18deg); } to { transform: rotate(18deg); } }

/* ===== Background texture ===== */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
}
.page-glow {
  position: fixed;
  border-radius: 999px;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}
.glow-a { top: -180px; left: -120px; width: 460px; height: 460px; background: rgba(167,139,250,0.14); }
.glow-b { top: 220px; right: -160px; width: 520px; height: 520px; background: rgba(255,174,92,0.10); }

main, .site-header, .site-footer { position: relative; z-index: 1; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  width: min(1180px, calc(100% - 32px));
  margin: 18px auto 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(9, 9, 11, 0.72);
  backdrop-filter: blur(22px);
  box-shadow: 0 16px 60px rgba(0,0,0,0.22);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand { display: flex; align-items: center; gap: 11px; min-width: fit-content; }
.brand img { width: 42px; height: 42px; object-fit: contain; }
.brand span { display: grid; gap: 1px; }
.brand strong { font-size: 14px; letter-spacing: -0.02em; }
.brand small { font-size: 9px; color: var(--muted); font-weight: 800; letter-spacing: 0.18em; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  background: rgba(255,255,255,0.03);
}
.nav-links a, .nav-github {
  padding: 9px 13px;
  border-radius: 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  transition: 180ms ease;
}
.nav-links a:hover, .nav-github:hover { background: rgba(255,255,255,0.08); color: var(--white); }
.nav-github { border: 1px solid rgba(255,255,255,0.09); background: rgba(255,255,255,0.04); }

/* ===== Shared shell ===== */
.section-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.eyebrow span {
  width: 8px; height: 8px;
  border-radius: 999px;
  background: var(--violet);
  box-shadow: 0 0 22px rgba(167,139,250,0.65);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 15px;
  font-size: 13px;
  font-weight: 850;
  letter-spacing: -0.01em;
  transition: 180ms ease;
  cursor: pointer;
}
.button.primary { background: var(--white); color: var(--black); box-shadow: 0 18px 48px rgba(167,139,250,0.16); }
.button.primary:hover { transform: translateY(-1px); background: #ede9fe; }
.button.secondary { border: 1px solid rgba(255,255,255,0.1); background: rgba(255,255,255,0.045); color: var(--text); }
.button.secondary:hover { transform: translateY(-1px); background: rgba(255,255,255,0.08); }
.button.wide { width: 100%; }

/* ===== Hero ===== */
.hero {
  min-height: 720px;
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 54px;
  align-items: center;
  padding: 76px 0 64px;
}
.hero h1, .section-heading h2, .download-card h2 {
  margin: 18px 0 0;
  color: var(--text);
  line-height: 0.95;
  letter-spacing: -0.065em;
}
.hero h1 { max-width: 640px; font-size: clamp(44px, 6.4vw, 78px); }
.hero p, .section-heading p, .download-card p {
  color: var(--muted);
  font-size: 16px;
  max-width: 640px;
}
.hero p { margin: 24px 0 0; }
.hero-actions, .download-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.hero-meta span {
  padding: 7px 10px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 999px;
  background: rgba(255,255,255,0.035);
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
}

/* ===== Hero visual (app mock) ===== */
.hero-visual { position: relative; }
.hero-visual::before {
  content: "";
  position: absolute;
  inset: -40px;
  background: radial-gradient(circle at 60% 20%, rgba(167,139,250,0.16), transparent 60%);
  border-radius: 999px;
  z-index: -1;
}
.app-frame {
  border: 1px solid var(--line);
  border-radius: 26px;
  background: rgba(12,12,15,0.9);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.window-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  font-size: 11px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--soft);
}
.traffic { display: flex; gap: 6px; }
.traffic i { width: 10px; height: 10px; border-radius: 999px; background: rgba(255,255,255,0.16); }
.traffic i:first-child { background: rgba(255,174,92,0.7); }
.traffic i:nth-child(2) { background: rgba(167,139,250,0.7); }
.app-body { padding: 16px; display: grid; gap: 12px; }
.mock-topline {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--soft);
}
.mock-topline b { color: var(--text); font-size: 11px; }

.mock-chart {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(15,21,32,0.6);
  padding: 10px 10px 8px;
}
.mock-chart svg { display: block; }
.chart-legend { display: flex; gap: 14px; padding: 6px 4px 0; font-size: 9px; font-weight: 800; letter-spacing: 0.04em; }
.chart-legend span { color: var(--soft); display: inline-flex; align-items: center; gap: 5px; }
.chart-legend span::before { content: ""; width: 12px; height: 2.5px; border-radius: 2px; background: currentColor; }
.lg-train { color: var(--amber) !important; }
.lg-proj { color: var(--violet) !important; }
.lg-band { color: var(--soft) !important; }

/* animated chart draw-in */
.draw-loss { stroke-dasharray: 400; stroke-dashoffset: 400; animation: draw 1.4s ease forwards 0.3s; }
.draw-proj { stroke-dasharray: 200; stroke-dashoffset: 200; animation: draw 1s ease forwards 1.5s; opacity: 0; animation-fill-mode: forwards; }
.draw-band { opacity: 0; animation: fadein 0.8s ease forwards 2s; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fadein { to { opacity: 1; } }
.draw-proj { animation: draw 1s ease forwards 1.5s, show 0.01s linear forwards 1.5s; }
@keyframes show { to { opacity: 1; } }

.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.metric-card, .kernel-card, .feature-card, .flow-card, .preview-card, .download-card {
  border: 1px solid rgba(255,255,255,0.09);
  background: var(--surface);
  border-radius: 18px;
}
.metric-card { padding: 12px; border-radius: 13px; }
.metric-card small { font-size: 9px; color: var(--soft); text-transform: uppercase; letter-spacing: 0.1em; }
.metric-card strong { display: block; margin-top: 6px; font-size: 16px; letter-spacing: -0.03em; }
.metric-card:nth-child(2) strong { color: var(--violet); }

.kernel-card { padding: 14px; display: grid; gap: 7px; }
.kernel-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2px; }
.kernel-head b { font-size: 10px; text-transform: uppercase; letter-spacing: 0.15em; }
.kernel-head span {
  padding: 4px 8px; border-radius: 999px;
  background: rgba(167,139,250,0.14); color: #ddd6fe;
  font-size: 9px; font-weight: 900;
}
code { font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace; }
.kernel-card code, .terminal-preview code {
  display: block;
  padding: 7px 9px;
  border-radius: 9px;
  background: rgba(255,255,255,0.04);
  color: #d4d4d8;
  font-size: 10px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.kernel-card code.ok { background: rgba(34,197,94,0.12); color: #bbf7d0; }
.kernel-card code.info { background: rgba(95,211,232,0.12); color: #bae6fd; }
.kernel-card code.warn, .terminal-preview .line-warning { background: rgba(255,174,92,0.14); color: #fde68a; }
.terminal-preview .line-error { background: rgba(251,113,133,0.14); color: #fecdd3; }

/* ===== Section headings ===== */
.section-heading { margin-bottom: 34px; }
.section-heading h2, .download-card h2 { font-size: clamp(32px, 4.6vw, 58px); }
.section-heading p { margin-top: 16px; }
.section-heading.compact h2 { max-width: 720px; }

.capabilities, .forecast, .formats, .interface, .download-section { padding: 72px 0; }

/* ===== Feature grid ===== */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feature-card { padding: 24px; min-height: 220px; position: relative; overflow: hidden; border-radius: 22px; }
.feature-card::after {
  content: "";
  position: absolute; right: -30px; top: -30px;
  width: 120px; height: 120px; border-radius: 999px;
  background: rgba(167,139,250,0.08);
  filter: blur(10px);
}
.feature-card:nth-child(3n)::after { background: rgba(255,174,92,0.07); }
.icon-token {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 13px;
  background: rgba(167,139,250,0.12);
  color: #ddd6fe;
  font-size: 11px; font-weight: 900;
  margin-bottom: 38px;
}
.feature-card:nth-child(3n) .icon-token { background: rgba(255,174,92,0.12); color: #fde0c0; }
.feature-card h3 { margin: 0; font-size: 20px; letter-spacing: -0.04em; }
.feature-card p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }

/* ===== Forecast section ===== */
.forecast-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 14px; }
.forecast-side { display: grid; gap: 14px; }
.preview-card { padding: 22px; border-radius: 20px; }
.preview-title {
  display: flex; align-items: center; gap: 9px;
  font-size: 11px; font-weight: 850;
  text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 14px;
}
.preview-title span { width: 7px; height: 7px; border-radius: 999px; background: var(--violet); box-shadow: 0 0 14px rgba(167,139,250,0.6); }
.fc-headline { height: 100%; display: flex; flex-direction: column; }
.fc-headline p { color: var(--muted); font-size: 15px; line-height: 1.6; }
.fc-headline p b { color: var(--text); }
.fc-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 22px; }
.fc-badges span {
  padding: 7px 11px; border-radius: 999px;
  border: 1px solid rgba(167,139,250,0.25);
  background: rgba(167,139,250,0.08);
  color: #ddd6fe; font-size: 11px; font-weight: 800;
}
.forecast-side .preview-card p { color: var(--muted); font-size: 13.5px; margin: 0; }

/* ===== Formats / workflow ===== */
.workflow-panel {
  display: grid;
  grid-template-columns: 1fr 60px 1fr 60px 1fr;
  align-items: stretch;
}
.flow-card { min-height: 200px; padding: 24px; border-radius: 22px; }
.flow-card small { font-size: 10px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--soft); }
.flow-card strong { display: block; margin-top: 10px; font-size: 21px; letter-spacing: -0.04em; }
.flow-card p { color: var(--muted); font-size: 13.5px; margin: 12px 0 0; }
.flow-card p code { font-size: 12px; color: #ddd6fe; background: rgba(167,139,250,0.1); padding: 1px 5px; border-radius: 5px; }
.flow-card.source strong { color: var(--amber); }
.flow-card.output strong { color: var(--violet); }
.flow-line { position: relative; }
.flow-line::before {
  content: "";
  position: absolute; top: 50%; left: 8px; right: 8px;
  height: 2px;
  background: linear-gradient(90deg, rgba(255,174,92,0.5), rgba(167,139,250,0.5));
}
.flow-line::after {
  content: "";
  position: absolute; top: 50%; right: 6px;
  width: 7px; height: 7px;
  transform: translateY(-50%) rotate(45deg);
  border-top: 2px solid rgba(167,139,250,0.7);
  border-right: 2px solid rgba(167,139,250,0.7);
}

.command-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(15,21,32,0.55);
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  overflow: hidden;
}
.command-strip > span { color: var(--violet); font-weight: 900; }
.command-strip code { color: #d4d4d8; font-size: 12px; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.command-strip button {
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  border-radius: 10px;
  padding: 7px 12px;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
  transition: 160ms ease;
  flex-shrink: 0;
}
.command-strip button:hover { background: rgba(255,255,255,0.1); }
.command-strip button.copied { background: rgba(34,197,94,0.18); color: #bbf7d0; border-color: rgba(34,197,94,0.3); }

/* ===== Interface grid ===== */
.interface-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; align-items: start; }
.preview-column { display: grid; gap: 14px; }
.preview-column.large .preview-card { min-height: 0; }
.preview-card.tall { min-height: 220px; }
.project-row, .form-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 12px;
}
.project-row:first-of-type, .form-row:first-of-type { border-top: none; }
.project-row small, .form-row label { color: var(--soft); }
.project-row b { color: var(--text); font-family: "JetBrains Mono", monospace; font-size: 11px; }
.form-row em { color: var(--muted); font-style: normal; font-size: 11px; }
.preview-card p { color: var(--muted); font-size: 13.5px; margin: 0; }
.preview-card ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 13px; }
.preview-card ul li { margin: 8px 0; }
.terminal-preview code i { color: var(--violet); font-style: normal; margin-right: 8px; }
.terminal-preview code b { color: var(--soft); font-weight: 800; margin-right: 8px; }
.trainer-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.trainer-strip div {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 13px;
  padding: 12px;
}
.trainer-strip small { font-size: 9px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--soft); }
.trainer-strip strong { display: block; margin-top: 6px; font-size: 12px; letter-spacing: -0.02em; }

/* ===== Download ===== */
.download-card {
  padding: 44px;
  border-radius: var(--radius);
  display: grid;
  gap: 22px;
  background:
    radial-gradient(circle at 12% 0%, rgba(167,139,250,0.12), transparent 60%),
    var(--surface);
}
.download-actions { margin-top: 0; }
.download-note { font-size: 12.5px; color: var(--soft); margin: 4px 0 0; }

/* ===== Footer ===== */
.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin: 34px auto 46px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--soft);
}
.site-footer .brand img { width: 30px; height: 30px; }
.site-footer p { font-size: 13px; }

/* ===== Responsive ===== */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding: 56px 0 40px; min-height: 0; }
  .hero-visual { order: 2; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .forecast-grid { grid-template-columns: 1fr; }
  .workflow-panel { grid-template-columns: 1fr; gap: 14px; }
  .flow-line { display: none; }
  .interface-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}

@media (max-width: 640px) {
  .hero h1 { font-size: 40px; }
  .feature-grid { grid-template-columns: 1fr; }
  .metric-grid { grid-template-columns: 1fr; }
  .trainer-strip { grid-template-columns: 1fr 1fr; }
  .site-footer { flex-direction: column; align-items: flex-start; gap: 16px; }
  .download-card { padding: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  .spin, .orbit, .loader-mark, .draw-loss, .draw-proj, .draw-band { animation: none !important; }
  .draw-loss, .draw-proj { stroke-dashoffset: 0; }
  .draw-band, .draw-proj { opacity: 1; }
  * { scroll-behavior: auto !important; }
}