:root {
  --bg: #0b0e16;
  --bg-elev: #11151f;
  --bg-card: #131826;
  --fg: #e6ecff;
  --fg-mute: #8a93b8;
  --fg-dim: #5a6691;
  --line: #1f2638;
  --accent: #4ea8ff;
  --accent-2: #c084fc;
  --accent-3: #34d399;
  --grad-1: linear-gradient(135deg, #4ea8ff 0%, #a78bfa 50%, #f472b6 100%);
}

[data-theme="light"] {
  --bg: #f7f8fb;
  --bg-elev: #ffffff;
  --bg-card: #ffffff;
  --fg: #0b0e16;
  --fg-mute: #4a5170;
  --fg-dim: #7c84a3;
  --line: #e3e7f0;
  --accent: #2563eb;
  --accent-2: #7c3aed;
  --accent-3: #059669;
  --grad-1: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #db2777 100%);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color .2s ease, color .2s ease;
}

a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: var(--accent-2); }

code, pre, .mono { font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* NAV */
nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; max-width: 1180px; margin: 0 auto;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: 'JetBrains Mono', monospace; font-weight: 600; font-size: 16px;
  letter-spacing: -0.02em; color: var(--fg);
}
.brand-mark {
  width: 26px; height: 26px;
  background: var(--grad-1);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
}
.brand-mark svg { width: 16px; height: 16px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--fg-mute); font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--fg); }
.nav-cta {
  padding: 7px 13px; border: 1px solid var(--line);
  border-radius: 6px; background: var(--bg-elev);
  color: var(--fg) !important; font-size: 13px;
}
.nav-cta:hover { border-color: var(--fg-mute); }
.nav-cta-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white !important;
  font-weight: 600;
}
.nav-cta-primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
}
.theme-toggle {
  width: 34px; height: 34px; border-radius: 6px;
  border: 1px solid var(--line); background: var(--bg-elev);
  cursor: pointer; color: var(--fg);
  display: flex; align-items: center; justify-content: center;
  transition: border-color .15s, color .15s;
}
.theme-toggle:hover { border-color: var(--fg-mute); }
.theme-toggle svg { width: 15px; height: 15px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* HERO */
.hero { padding: 80px 0 60px; }
.hero-grid {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px;
  align-items: center;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 11px; border: 1px solid var(--line);
  border-radius: 100px; background: var(--bg-elev);
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  color: var(--fg-mute); margin-bottom: 24px;
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-3);
}

h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.05; letter-spacing: -0.03em;
  margin-bottom: 20px; font-weight: 700;
}
h1 .grad {
  background: var(--grad-1);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead {
  font-size: 18px; color: var(--fg-mute); margin-bottom: 32px;
  max-width: 540px;
}

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: 8px;
  font-weight: 500; font-size: 14px;
  transition: background .15s, border-color .15s, color .15s;
  cursor: pointer; border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent); color: white !important;
}
.btn-primary:hover { background: var(--accent-2); }
.btn-ghost {
  background: var(--bg-elev); color: var(--fg) !important;
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--fg-mute); }

/* HERO VISUAL */
.hero-visual {
  position: relative; aspect-ratio: 4 / 3;
  border-radius: 12px; overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg);
}
.hero-visual img,
.hero-visual .mock-svg { width: 100%; height: 100%; display: block; }
.mock-svg text { font-feature-settings: "tnum" on, "lnum" on; }

/* METRIC STRIP */
.metrics {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  margin: 60px 0; padding: 0;
  background: var(--line); border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden;
}
.metric { background: var(--bg-elev); padding: 24px; text-align: center; }
.metric .num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 26px; font-weight: 600; color: var(--fg);
  margin-bottom: 4px;
}
.metric .lbl {
  font-size: 12px; color: var(--fg-mute);
  text-transform: uppercase; letter-spacing: 0.08em;
}

/* SECTION */
section { padding: 80px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag {
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  color: var(--accent); letter-spacing: 0.1em; text-transform: uppercase;
  margin-bottom: 14px;
}
h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(30px, 4vw, 42px); line-height: 1.1;
  letter-spacing: -0.02em; font-weight: 700; margin-bottom: 16px;
}
.section-head p { color: var(--fg-mute); font-size: 17px; }

/* FEATURES */
.features {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
#about .features { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1080px) { #about .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px)  { #about .features { grid-template-columns: 1fr; } }
.feature {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 12px; padding: 28px;
  transition: border-color .15s;
}
.feature:hover { border-color: var(--fg-mute); }
.feature-icon {
  width: 40px; height: 40px; border-radius: 8px;
  background: var(--bg-elev); border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; color: var(--accent);
}
.feature-icon svg { width: 20px; height: 20px; }
.feature h3 {
  font-size: 17px; margin-bottom: 8px; font-weight: 600;
  font-family: 'Space Grotesk', sans-serif;
}
.feature p { color: var(--fg-mute); font-size: 14.5px; line-height: 1.6; }

/* ARCHITECTURE */
.arch-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
  align-items: center;
}
.arch-text h2 { text-align: left; margin-bottom: 20px; }
.arch-text ul { list-style: none; margin-top: 24px; }
.arch-text li {
  padding: 14px 0; border-top: 1px solid var(--line);
  display: flex; gap: 14px; align-items: start;
}
.arch-text li:last-child { border-bottom: 1px solid var(--line); }
.arch-text li .num {
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent); font-size: 13px; min-width: 28px;
}
.arch-text li strong { display: block; margin-bottom: 2px; }
.arch-text li span { color: var(--fg-mute); font-size: 14px; }

.code-block {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 10px; padding: 0; overflow: hidden;
}
.code-head {
  padding: 11px 16px; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 10px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  color: var(--fg-dim);
  background: var(--bg-elev);
}
.code-head .dots { display: flex; gap: 6px; }
.code-head .dots span { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.code-block pre {
  padding: 20px; font-size: 13px; line-height: 1.7;
  color: var(--fg); overflow-x: auto;
}
.code-block .kw { color: var(--accent-2); }
.code-block .str { color: var(--accent-3); }
.code-block .com { color: var(--fg-dim); }
.code-block .fn { color: var(--accent); }

/* CNV SURPRISE GRID */
.cnv-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  max-width: 1180px; margin: 0 auto;
}
.cnv-card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 12px; padding: 22px;
  display: flex; flex-direction: column;
  transition: border-color .2s ease, transform .2s ease;
}
.cnv-card:hover { border-color: var(--fg-mute); transform: translateY(-2px); }
.cnv-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 14px; gap: 10px;
}
.cnv-name {
  font-family: 'JetBrains Mono', monospace; font-weight: 700;
  font-size: 17px; color: var(--accent); letter-spacing: -0.01em;
}
.cnv-tag {
  font-size: 10.5px; color: var(--fg-dim); text-align: right;
  text-transform: uppercase; letter-spacing: 0.06em; font-weight: 500;
}
.cnv-vis {
  background: linear-gradient(180deg, var(--bg-elev), var(--bg));
  border: 1px solid var(--line);
  border-radius: 10px; padding: 18px 16px 14px;
  margin-bottom: 14px;
  display: flex; flex-direction: column; gap: 12px;
  position: relative; overflow: hidden;
}
.cnv-vrow {
  display: flex; align-items: center; gap: 10px;
  font-family: 'JetBrains Mono', monospace; font-size: 10.5px;
  color: var(--fg-dim);
}
.cnv-vrow .lbl { width: 56px; flex-shrink: 0; letter-spacing: 0.02em; }
.cnv-vrow .pips {
  display: flex; flex: 1; gap: 2px; flex-wrap: wrap;
  align-content: center; min-height: 12px;
}
.cnv-vrow .count {
  color: var(--fg); font-weight: 700; flex-shrink: 0;
  min-width: 42px; text-align: right; font-size: 11.5px;
  font-variant-numeric: tabular-nums;
}
.cnv-pip {
  width: 11px; height: 11px; border-radius: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent) 60%, rgba(0,0,0,0.25) 100%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.22), 0 1px 2px rgba(0,0,0,0.25);
  flex-shrink: 0;
}
.cnv-pip.b { background: linear-gradient(180deg, var(--accent-2) 0%, var(--accent-2) 60%, rgba(0,0,0,0.25) 100%); }
.cnv-pip.c { background: linear-gradient(180deg, var(--accent-3) 0%, var(--accent-3) 60%, rgba(0,0,0,0.25) 100%); }
.cnv-pip.thin { width: 5px; height: 14px; border-radius: 1px; }
.cnv-pip.fade { opacity: 0.35; }
.cnv-ellipsis {
  color: var(--fg-dim); font-family: 'JetBrains Mono', monospace;
  font-size: 12px; padding: 0 4px; align-self: center;
}
.cnv-delta {
  margin-top: 2px; padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: 'JetBrains Mono', monospace; font-size: 11.5px;
  color: var(--accent-2); letter-spacing: 0.01em;
  display: flex; align-items: baseline; gap: 8px;
}
.cnv-delta strong {
  font-size: 18px; color: var(--fg); font-weight: 700;
  letter-spacing: -0.02em;
}
.cnv-cells {
  display: grid; grid-template-columns: repeat(18, 1fr);
  gap: 4px; flex: 1; align-content: center; padding: 4px 0;
}
.cnv-cell {
  aspect-ratio: 1; border-radius: 50%;
  background: var(--line);
  transition: transform .2s ease;
}
.cnv-cell.hit {
  background: radial-gradient(circle, var(--accent-2) 0%, color-mix(in srgb, var(--accent-2) 60%, black) 100%);
  box-shadow: 0 0 6px color-mix(in srgb, var(--accent-2) 50%, transparent);
}
.cnv-cell.hit-c {
  background: radial-gradient(circle, var(--accent) 0%, color-mix(in srgb, var(--accent) 60%, black) 100%);
  box-shadow: 0 0 6px color-mix(in srgb, var(--accent) 50%, transparent);
}
.cnv-desc { color: var(--fg-mute); font-size: 13.5px; line-height: 1.55; }
.cnv-card.kicker {
  border-color: color-mix(in srgb, var(--accent-2) 55%, var(--line));
  background: linear-gradient(180deg, var(--bg-card), color-mix(in srgb, var(--accent-2) 5%, var(--bg-card)));
  box-shadow: 0 0 24px color-mix(in srgb, var(--accent-2) 8%, transparent);
}
.cnv-card.kicker .cnv-name { color: var(--accent-2); }
.cnv-card.kicker .cnv-cells { grid-template-columns: repeat(14, 1fr); gap: 5px; }

@media (max-width: 880px) { .cnv-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cnv-grid { grid-template-columns: 1fr; } }

/* FORMAT TABLE */
.format-table {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden;
  max-width: 800px; margin: 40px auto 0;
}
.format-row {
  display: grid; grid-template-columns: 100px 1fr 140px;
  padding: 18px 24px; gap: 24px;
  border-bottom: 1px solid var(--line); align-items: center;
}
.format-row:last-child { border-bottom: 0; }
.format-row.head {
  background: var(--bg-elev);
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  color: var(--fg-dim); text-transform: uppercase; letter-spacing: 0.08em;
}
.format-row .ext {
  font-family: 'JetBrains Mono', monospace; font-weight: 600;
  color: var(--accent);
}
.format-row .desc { color: var(--fg-mute); font-size: 14.5px; }
.format-row .size {
  font-family: 'JetBrains Mono', monospace; font-size: 13px;
  color: var(--fg); text-align: right;
}

/* DOWNLOAD */
.download-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  margin-bottom: 32px;
}
.download-card {
  display: block; padding: 22px;
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--fg) !important;
  transition: border-color .15s;
}
.download-card:hover { border-color: var(--fg-mute); }
.dl-os {
  display: flex; align-items: center; gap: 8px;
  color: var(--accent); font-size: 13px; font-weight: 600;
  font-family: 'JetBrains Mono', monospace; margin-bottom: 12px;
}
.dl-name {
  font-family: 'JetBrains Mono', monospace; font-size: 13.5px;
  color: var(--fg); margin-bottom: 6px; word-break: break-all;
}
.dl-meta {
  font-size: 12px; color: var(--fg-mute);
  font-family: 'JetBrains Mono', monospace;
}

.quickstart {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 10px; padding: 18px 22px;
  display: flex; flex-direction: column; gap: 10px;
}
.qs-step {
  display: flex; align-items: center; gap: 14px;
  font-family: 'JetBrains Mono', monospace; font-size: 13px;
}
.qs-step .qs-n {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--bg-elev); border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: 11px; font-weight: 600;
  flex-shrink: 0;
}
.qs-step code {
  color: var(--fg);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 5px 10px; border-radius: 5px;
  font-size: 12.5px; flex: 1;
  overflow-x: auto; white-space: nowrap;
}

/* KEYBOARD */
.kbd-grid {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 12px; overflow: hidden;
  max-width: 760px; margin: 0 auto;
}
.kbd-row {
  display: grid; grid-template-columns: 1fr auto;
  padding: 14px 22px; gap: 16px;
  border-bottom: 1px solid var(--line); align-items: center;
}
.kbd-row:last-child { border-bottom: 0; }
.kbd-action { color: var(--fg); font-size: 14px; }
.kbd-keys { display: flex; gap: 4px; align-items: center; color: var(--fg-mute); font-size: 12px; }
kbd {
  font-family: 'JetBrains Mono', monospace; font-size: 11.5px;
  padding: 3px 8px; border-radius: 5px;
  background: var(--bg-elev); border: 1px solid var(--line);
  color: var(--fg); box-shadow: inset 0 -1px 0 var(--line);
}

/* CTA SECTION */
.cta-section {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 14px; padding: 56px 40px; text-align: center;
  margin: 60px 0;
}
.cta-section p {
  color: var(--fg-mute); margin: 12px 0 28px; font-size: 17px;
}
.cta-section .cta-row { justify-content: center; }

/* FOOTER */
footer { border-top: 1px solid var(--line); padding: 40px 0; margin-top: 40px; }
.foot {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px; color: var(--fg-mute); font-size: 13px;
}
.foot-links { display: flex; gap: 24px; }
.foot-links a { color: var(--fg-mute); }
.foot-links a:hover { color: var(--fg); }

/* RESPONSIVE */
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 640px; margin: 0 auto; }
  .features { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { gap: 16px; }
  .nav-links a:not(.nav-cta) { display: none; }
}
@media (max-width: 600px) {
  .nav-links { gap: 10px; }
  .nav-links .nav-cta:not(.nav-cta-primary) { display: none; }
  .nav-cta { padding: 6px 10px; font-size: 12px; }
  .brand { font-size: 14px; }
  .nav-inner { padding: 12px 16px; }
}
@media (max-width: 520px) {
  .download-grid { grid-template-columns: 1fr; }
}