/* Psy Protocol Killer Apps Lab · Psy 协议杀手级应用实验室
   Canonical Psy brand · psy.xyz tokens · psi-glyph
   Cabin Condensed (display) · Inter (body) · JetBrains Mono (mono) */

:root {
  --bg: #0a0a0c;
  --surface: #0a0a0c;
  --surface-2: #16161a;
  --surface-3: #26262a;
  --border: rgba(250, 250, 250, 0.10);
  --border-strong: rgba(250, 250, 250, 0.22);
  --ink: #fafafa;
  --ink-dim: #a3a3ab;
  --ink-mute: #6e6e78;
  --primary: #61f5b3;
  --primary-soft: rgba(97, 245, 179, 0.12);
  --primary-glow: rgba(97, 245, 179, 0.28);
  /* Aliases — all map to canonical primary or neutral */
  --primary-2: var(--primary);
  --coral:     var(--ink-dim);
  --teal:      var(--primary);
  --gold:      var(--ink-dim);
  --magenta:   var(--ink-dim);
  --shadow: 0 18px 44px rgba(0, 0, 0, 0.55);
  --radius: 4px;
  --radius-lg: 12px;
  --maxw: 1280px;
  --display: "Cabin Condensed", system-ui, sans-serif;
  --body:    "Inter", system-ui, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, monospace;
}

html[data-theme="light"] {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-2: #f8f8f8;
  --surface-3: #ebebed;
  --border: rgba(10, 10, 12, 0.13);
  --border-strong: rgba(10, 10, 12, 0.30);
  --ink: #0a0a0c;
  --ink-dim: #4f5260;
  --ink-mute: #777a85;
  --primary: #00b87b;
  --primary-soft: rgba(0, 184, 123, 0.10);
  --primary-glow: rgba(0, 184, 123, 0.20);
  --shadow: 0 14px 32px rgba(10, 10, 12, 0.10);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html[data-lang="en"] [lang="zh"] { display: none !important; }
html[data-lang="zh"] [lang="en"] { display: none !important; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ─── Topbar ─────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 18px; height: 64px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--display); font-size: 19px; letter-spacing: -0.01em;
  color: var(--ink); font-weight: 600;
}
.brand-mark {
  width: 26px; height: 26px; flex: 0 0 auto;
  background: var(--primary);
  border-radius: 6px;
  display: grid; place-items: center;
  color: var(--bg);
  box-shadow: 0 0 12px var(--primary-glow);
}
.brand-mark svg { width: 64%; height: 64%; display: block; }
.brand small {
  font-family: var(--mono); font-size: 10.5px; color: var(--ink-mute);
  letter-spacing: 0.16em; text-transform: uppercase;
  margin-left: 6px; font-weight: 400;
}
.nav { display: flex; gap: 22px; align-items: center; }
.nav a {
  color: var(--ink-dim); font-family: var(--mono); font-size: 11.5px;
  letter-spacing: 0.06em; text-transform: uppercase;
}
.nav a:hover { color: var(--ink); text-decoration: none; }

.controls { display: flex; gap: 8px; align-items: center; }
.lang-toggle, .theme-toggle {
  display: inline-flex; border: 1px solid var(--border-strong);
  border-radius: 999px; overflow: hidden; background: var(--surface);
}
.lang-toggle button, .theme-toggle button {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.04em;
  background: transparent; color: var(--ink-dim); border: 0;
  padding: 6px 12px; cursor: pointer;
}
.lang-toggle button.active, .theme-toggle button.active {
  background: var(--ink); color: var(--bg);
}

@media (max-width: 980px) { .nav { display: none; } }

/* ─── Hero ─────────────────────────────── */
.hero {
  padding: 100px 0 84px;
  border-bottom: 1px solid var(--border);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(40% 60% at 75% 20%, rgba(122, 138, 255, 0.14), transparent 60%),
    radial-gradient(40% 60% at 18% 70%, rgba(255, 122, 89, 0.10), transparent 60%),
    radial-gradient(50% 70% at 60% 90%, rgba(64, 196, 168, 0.08), transparent 60%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(232,232,240,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(232,232,240,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}
.hero-inner { position: relative; }
.hero-eyebrow {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 26px;
}
.hero h1 {
  font-family: var(--display); font-weight: 600;
  font-size: clamp(46px, 7.4vw, 96px);
  line-height: 1.02; letter-spacing: -0.025em;
  margin: 0 0 22px; color: var(--ink);
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--primary), var(--magenta));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}
.hero h1 em.c {
  background: linear-gradient(120deg, var(--coral), var(--gold));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 18px; color: var(--ink-dim); max-width: 780px;
  margin: 0 0 32px; line-height: 1.65;
}
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 22px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--ink-mute);
}
.hero-meta span::before { content: "▸ "; color: var(--primary); }

/* ─── Section ─────────────────────────────── */
section.module {
  padding: 84px 0; border-bottom: 1px solid var(--border);
}
.section-head {
  display: grid; grid-template-columns: 240px 1fr; gap: 36px;
  margin-bottom: 36px; align-items: start;
}
.section-tag {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--primary);
  border-top: 1px solid var(--primary); padding-top: 8px;
}
.section-head h2 {
  font-family: var(--display); font-weight: 600;
  font-size: clamp(30px, 4.2vw, 52px); margin: 0;
  line-height: 1.04; color: var(--ink); letter-spacing: -0.02em;
}
.section-lede {
  margin-top: 16px; color: var(--ink-dim); max-width: 820px;
  font-size: 16.5px;
}
@media (max-width: 760px) { .section-head { grid-template-columns: 1fr; gap: 12px; } }

/* ─── Architecture diagram ─────────────────────────────── */
.arch-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 22px;
  box-shadow: var(--shadow);
}
.arch-svg-wrap { width: 100%; overflow: hidden; border-radius: 8px; }
.arch-svg { width: 100%; height: auto; display: block; }

/* ─── Cards ─────────────────────────────── */
.card-row {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 18px;
}
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  position: relative; overflow: hidden;
  transition: border-color 0.18s, transform 0.18s;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.card .kicker {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 10px;
}
.card.coral .kicker   { color: var(--coral); }
.card.teal .kicker    { color: var(--teal); }
.card.gold .kicker    { color: var(--gold); }
.card.magenta .kicker { color: var(--magenta); }
.card h3 {
  font-family: var(--display); font-weight: 600; font-size: 22px;
  margin: 0 0 8px; color: var(--ink); line-height: 1.22; letter-spacing: -0.01em;
}
.card p { color: var(--ink-dim); font-size: 14.5px; line-height: 1.65; margin: 0 0 8px; }
.card ul { margin: 8px 0 0; padding-left: 18px; }
.card li { color: var(--ink-dim); font-size: 14px; margin-bottom: 4px; }
.card .stat-row {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px;
  margin-top: 14px; font-family: var(--mono); font-size: 10.5px; color: var(--ink-mute);
}
.card .stat-row span.v { display: block; color: var(--ink); font-size: 14px; margin-top: 2px; font-family: var(--display); font-weight: 600; }

/* ─── Killer-app generator ─────────────────────────────── */
.gen-shell {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
}
.gen-controls {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px; margin-bottom: 20px;
}
.gen-controls label {
  display: block; font-family: var(--mono); font-size: 10.5px;
  letter-spacing: 0.14em; color: var(--ink-mute); text-transform: uppercase;
  margin-bottom: 6px;
}
.gen-controls select, .gen-shell button.gen-btn {
  width: 100%;
  background: var(--surface-2); color: var(--ink);
  border: 1px solid var(--border-strong); border-radius: 6px;
  padding: 10px 12px; font-family: var(--mono); font-size: 13px;
}
.gen-shell button.gen-btn {
  background: var(--primary); color: #07080d; border-color: var(--primary);
  font-weight: 700; cursor: pointer; letter-spacing: 0.08em; text-transform: uppercase;
  margin-top: 8px;
}
.gen-shell button.gen-btn:hover { background: var(--coral); border-color: var(--coral); color: #07080d; }
.gen-output {
  border-top: 1px solid var(--border); padding-top: 18px; margin-top: 8px;
}
.gen-card {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 22px;
  margin-bottom: 14px;
  position: relative;
}
.gen-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--primary);
}
.gen-card .ribbon {
  display: inline-block; font-family: var(--mono); font-size: 10.5px;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink-dim); margin-bottom: 6px;
}
.gen-card h4 {
  font-family: var(--display); font-weight: 600; font-size: 22px;
  margin: 0 0 8px; color: var(--ink); letter-spacing: -0.01em;
}
.gen-card .tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.gen-card .tag {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.06em;
  border: 1px solid var(--border-strong); border-radius: 999px;
  padding: 4px 10px; color: var(--ink-dim);
}
.gen-card .tag.viral    { color: var(--coral); border-color: var(--coral); }
.gen-card .tag.fit      { color: var(--primary); border-color: var(--primary); }
.gen-card .tag.scale    { color: var(--teal); border-color: var(--teal); }
.gen-card .tag.network  { color: var(--magenta); border-color: var(--magenta); }
.gen-card .tag.money    { color: var(--gold); border-color: var(--gold); }
.gen-card p { color: var(--ink-dim); font-size: 14.5px; line-height: 1.65; margin: 0 0 8px; }

/* ─── Internet simulator ─────────────────────────────── */
.sim-shell {
  display: grid; grid-template-columns: 320px 1fr; gap: 24px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
}
@media (max-width: 880px) { .sim-shell { grid-template-columns: 1fr; } }
.sim-shell h3 {
  font-family: var(--display); font-weight: 600; font-size: 22px;
  margin: 0 0 14px;
}
.sim-controls label {
  display: block; font-family: var(--mono); font-size: 10.5px;
  letter-spacing: 0.12em; color: var(--ink-mute); text-transform: uppercase;
  margin-bottom: 6px; margin-top: 14px;
}
.sim-controls select, .sim-controls input[type="range"] {
  width: 100%;
  background: var(--surface-2); color: var(--ink);
  border: 1px solid var(--border-strong); border-radius: 4px;
  padding: 8px 10px; font-family: var(--mono); font-size: 13px;
}
.sim-output { display: flex; flex-direction: column; gap: 14px; }
.sim-output .sbar {
  display: grid; grid-template-columns: 200px 1fr 60px;
  gap: 10px; align-items: center;
  font-family: var(--mono); font-size: 12px; color: var(--ink-dim);
}
.sim-output .sbar .meter {
  height: 10px; border-radius: 4px;
  background: var(--surface-2); position: relative; overflow: hidden;
}
.sim-output .sbar .meter > i {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: linear-gradient(90deg, var(--primary), var(--coral));
  transition: width 0.4s;
}
.sim-output .sbar .v { color: var(--ink); text-align: right; font-family: var(--display); font-size: 16px; font-weight: 600; }
.sim-readout {
  font-family: var(--mono); font-size: 12.5px; color: var(--ink-dim);
  border: 1px dashed var(--border-strong);
  border-radius: 6px; padding: 14px 16px; margin-top: 8px;
  line-height: 1.7;
}

/* ─── AI ─────────────────────────────── */
.ai-shell {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
}
.ai-prompts { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.ai-prompt {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.04em;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 8px 14px; color: var(--ink-dim);
  cursor: pointer; transition: all 0.16s;
}
.ai-prompt:hover { color: var(--ink); border-color: var(--primary); }
.ai-input-row { display: flex; gap: 8px; }
.ai-input-row input {
  flex: 1; background: var(--surface-2); color: var(--ink);
  border: 1px solid var(--border-strong); border-radius: 4px;
  padding: 11px 14px; font-family: var(--body); font-size: 14.5px;
}
.ai-input-row button {
  background: var(--primary); color: #07080d; border: 0;
  padding: 11px 22px; font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.14em; text-transform: uppercase;
  border-radius: 4px; cursor: pointer; font-weight: 700;
}
.ai-input-row button:hover { background: var(--coral); }
.ai-output {
  margin-top: 18px; min-height: 80px;
  font-size: 15px; line-height: 1.75; color: var(--ink-dim);
  border-top: 1px solid var(--border); padding-top: 16px;
}
.ai-output strong { color: var(--ink); }
.ai-output em {
  font-style: normal; color: var(--primary); font-family: var(--mono);
  font-size: 12.5px; letter-spacing: 0.06em;
}
.ai-output p { margin: 0 0 12px; }

/* ─── Guardrails ─────────────────────────────── */
.guardrails {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  border-left: 3px solid var(--coral);
}
.guardrails h3 { font-family: var(--display); font-weight: 600; margin: 0 0 12px; font-size: 22px; }
.guardrails ul { margin: 0; padding-left: 20px; }
.guardrails li { color: var(--ink-dim); margin-bottom: 10px; font-size: 14.5px; }

/* ─── Footer ─────────────────────────────── */
footer {
  padding: 60px 0 50px;
  font-family: var(--mono); font-size: 12px; color: var(--ink-mute);
  letter-spacing: 0.04em;
}
footer a { color: var(--ink-dim); }
footer .foot-row {
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
footer .links { display: flex; gap: 18px; flex-wrap: wrap; }

/* ─── Util ─────────────────────────────── */
.mono { font-family: var(--mono); }
.dim  { color: var(--ink-dim); }
.tag-primary { color: var(--primary); }
.tag-coral   { color: var(--coral); }
.tag-teal    { color: var(--teal); }
.tag-gold    { color: var(--gold); }
.tag-magenta { color: var(--magenta); }