/* MetaCoder 官网 — 设计语言: ダークネイビー + ネオンアクセント
 * 色板沿用 PPT (generate-metacoder-ja.js) 的 T 令牌
 */
:root {
  --bg: #0A0E27;
  --bg-darker: #060818;
  --card: #151B3B;
  --card-2: #1E2654;
  --cyan: #00E5FF;
  --magenta: #FF00C8;
  --purple: #9333EA;
  --green: #00FF94;
  --gold: #FFD700;
  --red: #FF3D71;
  --orange: #FF8A3D;
  --white: #FFFFFF;
  --gray-light: #CBD5E1;
  --gray: #94A3B8;
  --gray-dim: #64748B;
  --border: #2D3561;
  --radius: 14px;
  --maxw: 1180px;
  --font: "Inter", "Yu Gothic UI", "Hiragino Kaku Gothic ProN", "Noto Sans SC",
          "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "Consolas", ui-monospace, "SFMono-Regular", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--gray-light);
  font-family: var(--font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---- generic section ---- */
section { position: relative; padding: 96px 0; }
.kicker {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 3px;
  color: var(--cyan); text-transform: uppercase; margin-bottom: 16px;
}
.section-title {
  font-size: clamp(28px, 4vw, 44px); font-weight: 800; color: var(--white);
  line-height: 1.15; letter-spacing: -0.5px; margin-bottom: 18px;
}
.section-lead { font-size: 18px; color: var(--gray); max-width: 760px; }
.center { text-align: center; }
.center .section-lead { margin-left: auto; margin-right: auto; }

.glow { filter: drop-shadow(0 0 18px rgba(0,229,255,.45)); }

/* gradient text */
.grad-cyan { background: linear-gradient(90deg,#00E5FF,#00FF94); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad-mag  { background: linear-gradient(90deg,#FF00C8,#9333EA); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---- buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 10px; cursor: pointer;
  font-family: var(--font); font-size: 15px; font-weight: 700; border: none;
  padding: 14px 26px; border-radius: 10px; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(95deg, var(--cyan), #38f0c0); color: #04121a;
  box-shadow: 0 8px 28px rgba(0,229,255,.35);
}
.btn-primary:hover { box-shadow: 0 12px 36px rgba(0,229,255,.5); }
.btn-secondary {
  background: var(--card-2); color: var(--white); border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-ghost { background: transparent; color: var(--white); border: 1px solid var(--border); }
.btn svg { width: 18px; height: 18px; }

/* ===========================================================
   NAVBAR
   =========================================================== */
header.nav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(6,8,24,.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 19px; color: var(--white); letter-spacing: -0.3px; }
.brand .logo { width: 30px; height: 30px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { font-size: 14.5px; color: var(--gray-light); transition: color .15s; }
.nav-links a:hover { color: var(--cyan); }
.nav-right { display: flex; gap: 14px; align-items: center; }

/* language switcher */
.lang {
  position: relative; font-size: 14px;
}
.lang-btn {
  display: flex; align-items: center; gap: 7px; cursor: pointer;
  background: var(--card); border: 1px solid var(--border); color: var(--gray-light);
  padding: 8px 13px; border-radius: 9px; font-family: var(--font); font-size: 14px;
}
.lang-btn:hover { border-color: var(--cyan); color: var(--white); }
.lang-menu {
  position: absolute; right: 0; top: 46px; min-width: 150px;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 6px; display: none; box-shadow: 0 18px 40px rgba(0,0,0,.5);
}
.lang-menu.open { display: block; }
.lang-menu button {
  display: block; width: 100%; text-align: left; background: none; border: none;
  color: var(--gray-light); padding: 9px 12px; border-radius: 7px; cursor: pointer;
  font-family: var(--font); font-size: 14px;
}
.lang-menu button:hover, .lang-menu button.active { background: var(--card-2); color: var(--cyan); }
.nav-toggle { display: none; background: none; border: none; color: var(--white); cursor: pointer; }

/* ===========================================================
   HERO
   =========================================================== */
.hero { padding: 72px 0 88px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero-bg .blob { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.blob-1 { width: 480px; height: 480px; background: radial-gradient(circle,#00E5FF55,transparent 70%); top: -160px; left: -120px; }
.blob-2 { width: 520px; height: 520px; background: radial-gradient(circle,#FF00C844,transparent 70%); top: -60px; right: -160px; }
.blob-3 { width: 380px; height: 380px; background: radial-gradient(circle,#9333EA33,transparent 70%); bottom: -180px; left: 40%; }

.hero-grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center;
}
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11.5px; font-weight: 700; letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--cyan); background: rgba(0,229,255,.08); border: 1px solid rgba(0,229,255,.3);
  padding: 7px 14px; border-radius: 999px; margin-bottom: 26px;
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px var(--green); }
.hero h1 {
  font-size: clamp(34px, 5vw, 58px); font-weight: 800; color: var(--white);
  line-height: 1.08; letter-spacing: -1.2px; margin-bottom: 24px;
}
.hero h1 .l2 { color: var(--cyan); }
.hero h1 .l3 { color: var(--magenta); }
.hero-sub { font-size: 18px; color: var(--gray); max-width: 560px; margin-bottom: 34px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 20px; }
.hero-note { font-size: 13px; color: var(--gray-dim); }

/* terminal mock */
.terminal {
  background: linear-gradient(180deg,#0c1130,#0a0e27);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 30px 70px rgba(0,0,0,.55), 0 0 0 1px rgba(0,229,255,.05);
  overflow: hidden;
}
.term-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: #0c1130; border-bottom: 1px solid var(--border); }
.term-bar .d { width: 12px; height: 12px; border-radius: 50%; }
.term-bar .d.r { background: #ff5f57; } .term-bar .d.y { background: #febc2e; } .term-bar .d.g { background: #28c840; }
.term-bar .term-title { margin-left: 12px; font-family: var(--mono); font-size: 12.5px; color: var(--gray-dim); }
.term-body { padding: 20px; font-family: var(--mono); font-size: 13px; line-height: 1.85; }
.term-body .ln { white-space: pre-wrap; }
.tk-prompt { color: var(--green); }
.tk-cmd { color: var(--cyan); }
.tk-flag { color: var(--gold); }
.tk-ok { color: var(--green); }
.tk-dim { color: var(--gray-dim); }
.tk-mag { color: var(--magenta); }
.tk-white { color: var(--gray-light); }
.cursor { display: inline-block; width: 8px; height: 15px; background: var(--cyan); vertical-align: -2px; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ===========================================================
   STATS BAR
   =========================================================== */
.stats { padding: 0; }
.stats-grid {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 20px;
  margin-top: -36px; position: relative; z-index: 5;
}
.stat {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 22px; position: relative; overflow: hidden;
}
.stat::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; }
.stat.c1::before { background: var(--cyan); } .stat.c2::before { background: var(--purple); }
.stat.c3::before { background: var(--green); } .stat.c4::before { background: var(--gold); }
.stat .num { font-size: 42px; font-weight: 800; line-height: 1; margin-bottom: 8px; }
.stat.c1 .num { color: var(--cyan); } .stat.c2 .num { color: var(--purple); }
.stat.c3 .num { color: var(--green); } .stat.c4 .num { color: var(--gold); }
.stat .lab { font-size: 15px; font-weight: 700; color: var(--white); }
.stat .sub { font-size: 12.5px; color: var(--gray-dim); margin-top: 3px; }

/* ===========================================================
   SCALE BAND
   =========================================================== */
.scale-band {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center;
  background: linear-gradient(120deg,#0d1230,#0a0e27); border: 1px solid var(--border);
  border-radius: 20px; padding: 44px 40px; position: relative; overflow: hidden;
}
.scale-band::before { content:""; position:absolute; right:-80px; top:-80px; width:320px; height:320px; border-radius:50%; background:radial-gradient(circle,#00E5FF22,transparent 70%); }
.scale-grid { display: grid; gap: 16px; position: relative; z-index: 1; }
.scale-item { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; }
.scale-item .st { font-size: 26px; font-weight: 800; line-height: 1.1; }
.scale-item .sd { font-size: 13.5px; color: var(--gray); margin-top: 5px; }

/* ===========================================================
   FOCUS / DIVISION OF LABOR
   =========================================================== */
.focus-grid { display: grid; grid-template-columns: 1fr auto 1.2fr; gap: 24px; align-items: stretch; margin-top: 52px; }
.focus-col { background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 30px 28px; }
.focus-col.you { border-top: 3px solid var(--magenta); }
.focus-col.mc { border-top: 3px solid var(--green); }
.focus-col h3 { font-size: 14px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 18px; }
.focus-col.you h3 { color: var(--magenta); }
.focus-col.mc h3 { color: var(--green); }
.focus-col ul { list-style: none; }
.focus-col li { display: flex; align-items: center; gap: 12px; font-size: 16px; color: var(--white); padding: 11px 0; border-bottom: 1px solid var(--border); }
.focus-col li:last-child { border-bottom: none; }
.focus-col li svg { flex: none; width: 20px; height: 20px; }
.focus-col.you li svg { color: var(--magenta); }
.focus-col.mc li svg { color: var(--green); }
.focus-arrow { display: grid; place-items: center; font-size: 34px; color: var(--cyan); }

/* ===========================================================
   HARNESS
   =========================================================== */
/* spec-kit spotlight */
.speckit {
  display: grid; grid-template-columns: 1.35fr 1fr; gap: 32px; align-items: stretch;
  margin-top: 44px; padding: 36px 34px; border-radius: 20px;
  background:
    linear-gradient(var(--bg-darker),var(--bg-darker)) padding-box,
    linear-gradient(120deg,#00E5FF,#9333EA,#FF00C8) border-box;
  border: 1.5px solid transparent;
  box-shadow: 0 24px 60px rgba(0,229,255,.10);
}
.speckit-title { font-size: clamp(20px,2.4vw,26px); font-weight: 800; color: var(--white); line-height: 1.25; margin: 6px 0 14px; }
.speckit-lead { font-size: 15px; color: var(--gray-light); margin-bottom: 22px; }
.speckit-points { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 22px; }
.sk-point { position: relative; padding-left: 18px; }
.sk-point::before { content:""; position:absolute; left:0; top:6px; width:7px; height:7px; border-radius:50%; background: linear-gradient(120deg,var(--cyan),var(--magenta)); }
.sk-pt { font-size: 14.5px; font-weight: 700; color: var(--white); margin-bottom: 4px; }
.sk-pd { font-size: 13px; color: var(--gray); line-height: 1.55; }

.speckit-compare { display: flex; flex-direction: column; gap: 14px; }
.sk-bad, .sk-good { flex: 1; border-radius: 14px; padding: 18px 20px; border: 1px solid var(--border); }
.sk-bad { background: rgba(255,61,113,.06); border-color: rgba(255,61,113,.3); }
.sk-good { background: rgba(0,255,148,.06); border-color: rgba(0,255,148,.3); }
.sk-ch { font-size: 14px; font-weight: 700; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.sk-bad .sk-ch { color: var(--red); }
.sk-good .sk-ch { color: var(--green); }
.sk-x, .sk-v { font-size: 15px; }
.speckit-compare ul { list-style: none; }
.speckit-compare li { font-size: 13.5px; color: var(--gray-light); padding: 6px 0 6px 18px; position: relative; }
.sk-bad li::before { content:"–"; position:absolute; left:2px; color: var(--red); }
.sk-good li::before { content:"›"; position:absolute; left:2px; color: var(--green); }

.feat-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; margin-top: 52px; }
.feat {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 26px; transition: transform .18s ease, border-color .18s ease;
}
.feat:hover { transform: translateY(-4px); border-color: var(--cyan); }
.feat .ico { width: 46px; height: 46px; border-radius: 11px; display: grid; place-items: center; margin-bottom: 18px; background: rgba(0,229,255,.08); }
.feat .ico svg { width: 24px; height: 24px; }
.feat h3 { font-size: 18px; font-weight: 700; color: var(--white); margin-bottom: 9px; }
.feat p { font-size: 14.5px; color: var(--gray); }

/* pipeline */
.pipeline-wrap {
  margin-top: 64px; background: var(--bg-darker); border: 1px solid var(--border);
  border-radius: 18px; padding: 40px 34px;
}
.pipeline-head { margin-bottom: 28px; }
.pipeline-head h3 { font-size: 22px; color: var(--white); font-weight: 700; }
.pipeline-head p { font-size: 14.5px; color: var(--gray-dim); margin-top: 6px; }
.pipeline {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: stretch;
}
.phase {
  flex: 1 1 0; min-width: 96px; position: relative;
  background: var(--card); border: 1px solid var(--border); border-radius: 11px;
  padding: 16px 12px 14px; text-align: center;
}
.phase .pn { font-family: var(--mono); font-size: 12px; color: var(--cyan); font-weight: 700; }
.phase .pt { font-size: 13px; color: var(--gray-light); margin-top: 6px; line-height: 1.35; }
.phase .gate { margin-top: 9px; font-size: 10px; letter-spacing: 1px; color: var(--green); border-top: 1px dashed var(--border); padding-top: 7px; }
.phase.confirm { border-color: var(--green); box-shadow: 0 0 0 1px rgba(0,255,148,.25); }
.phase.confirm .pn, .phase.confirm .pt { color: var(--green); }
.pipeline-foot {
  margin-top: 22px; display: flex; align-items: center; gap: 12px;
  font-size: 13.5px; color: var(--gray);
}
.pipeline-foot .rb { color: var(--gold); font-family: var(--mono); }

/* command reference */
.cmdref { margin-top: 56px; }
.cmdref-head { margin-bottom: 22px; }
.cmdref-head h3 { font-size: 24px; color: var(--white); font-weight: 700; }
.cmdref-head p { font-size: 14.5px; color: var(--gray-dim); margin-top: 6px; }
.cmd-group { margin-bottom: 22px; }
.cmd-grp-title { font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; padding: 8px 0; margin-bottom: 8px; border-bottom: 1px solid var(--border); }
.cmd-grp-title.c1 { color: var(--cyan); } .cmd-grp-title.c2 { color: var(--magenta); } .cmd-grp-title.c3 { color: var(--gold); }
.cmd-row { display: grid; grid-template-columns: 290px 1fr; gap: 20px; align-items: start; padding: 12px 6px; border-bottom: 1px solid rgba(45,53,97,.5); }
.cmd-row:hover { background: rgba(30,38,84,.35); border-radius: 8px; }
.cmd-name { font-family: var(--mono); font-size: 13.5px; color: var(--cyan); white-space: nowrap; overflow-x: auto; }
.cmd-desc { font-size: 14px; color: var(--gray-light); }

/* ===========================================================
   TOOLS
   =========================================================== */
.tools-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; margin-top: 52px; }

/* deep-dive tabs */
.deepdive { margin-top: 56px; background: var(--bg); border: 1px solid var(--border); border-radius: 18px; padding: 34px 32px; }
.dd-head { margin-bottom: 22px; }
.dd-head h3 { font-size: 24px; color: var(--white); font-weight: 700; }
.dd-head p { font-size: 14.5px; color: var(--gray-dim); margin-top: 6px; }
.dd-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 24px; }
.dd-tab {
  font-family: var(--mono); font-size: 15px; font-weight: 700; cursor: pointer;
  background: var(--card); border: 1px solid var(--border); color: var(--gray);
  padding: 10px 20px; border-radius: 10px; transition: all .15s;
}
.dd-tab:hover { color: var(--white); border-color: var(--gray-dim); }
.dd-tab.active { color: #04121a; background: linear-gradient(95deg,var(--cyan),#38f0c0); border-color: transparent; }
.dd-panel { display: none; }
.dd-panel.active { display: block; animation: fadein .25s ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.dd-syntax { font-family: var(--mono); font-size: 13.5px; background: var(--bg-darker); border: 1px solid var(--border); border-radius: 10px; padding: 14px 18px; overflow-x: auto; }
.dd-syntax code { color: var(--gray-light); white-space: nowrap; }
.dd-syntax .tk-prompt { color: var(--green); }
.dd-sub { font-size: 11.5px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--cyan); margin: 22px 0 12px; }
.dd-flow { font-family: var(--mono); font-size: 13px; line-height: 1.9; color: var(--gray-light); background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 14px 18px; }
.dd-hi { list-style: none; }
.dd-hi li { position: relative; padding: 8px 0 8px 26px; font-size: 14.5px; color: var(--gray-light); }
.dd-hi li::before { content: "▹"; position: absolute; left: 4px; color: var(--green); }

/* ===========================================================
   INFRA / TiDB
   =========================================================== */
.infra-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; margin-top: 52px; }
.infra-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 26px; transition: transform .18s, border-color .18s; }
.infra-card:hover { transform: translateY(-4px); border-color: var(--cyan); }
.infra-card .iico { width: 54px; height: 54px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 18px; }
.infra-card .iico svg { width: 28px; height: 28px; }
.infra-card h3 { font-size: 18px; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.infra-card p { font-size: 14.5px; color: var(--gray); }
.tool {
  position: relative; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px 28px; overflow: hidden;
  transition: transform .18s ease, border-color .18s ease;
}
.tool:hover { transform: translateY(-4px); }
.tool::after { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; }
.tool.t1::after { background: var(--cyan); } .tool.t1:hover { border-color: var(--cyan); }
.tool.t2::after { background: var(--magenta); } .tool.t2:hover { border-color: var(--magenta); }
.tool.t3::after { background: var(--green); } .tool.t3:hover { border-color: var(--green); }
.tool.t4::after { background: var(--gold); } .tool.t4:hover { border-color: var(--gold); }
.tool .tag { font-size: 11px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--gray-dim); }
.tool h3 { font-family: var(--mono); font-size: 27px; font-weight: 700; margin: 10px 0 14px; }
.tool.t1 h3 { color: var(--cyan); } .tool.t2 h3 { color: var(--magenta); }
.tool.t3 h3 { color: var(--green); } .tool.t4 h3 { color: var(--gold); }
.tool p { font-size: 14.5px; color: var(--gray); }

/* ===========================================================
   HOW IT WORKS
   =========================================================== */
.how-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 14px; align-items: center; margin-top: 52px; }
.how-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; height: 100%; }
.how-card .ht { font-size: 12px; font-weight: 700; letter-spacing: 3px; }
.how-card.i .ht { color: var(--cyan); } .how-card.g .ht { color: var(--magenta); } .how-card.o .ht { color: var(--green); }
.how-card .hv { font-size: 21px; font-weight: 700; color: var(--white); margin: 10px 0 12px; }
.how-card .hd { font-size: 14px; color: var(--gray); }
.how-arrow { color: var(--gray-dim); font-size: 26px; }
.how-card.g { border-color: rgba(255,0,200,.3); }

/* ===========================================================
   EDITIONS
   =========================================================== */
.editions-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 26px; margin-top: 52px; }
.editions-grid.single { grid-template-columns: 1fr; max-width: 600px; margin-left: auto; margin-right: auto; }
.edition {
  position: relative; background: var(--card); border: 1px solid var(--border);
  border-radius: 18px; padding: 34px 32px;
}
.edition.featured { border-color: var(--cyan); box-shadow: 0 0 0 1px rgba(0,229,255,.25), 0 24px 60px rgba(0,229,255,.12); }
.edition .pop {
  position: absolute; top: 22px; right: 24px; font-size: 10.5px; font-weight: 700;
  letter-spacing: 1.5px; color: #04121a; background: var(--cyan); padding: 5px 11px; border-radius: 999px;
}
.edition .etag { font-size: 11px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--gray-dim); }
.edition h3 { font-size: 24px; font-weight: 800; color: var(--white); margin: 9px 0 12px; }
.edition .ed-desc { font-size: 14.5px; color: var(--gray); margin-bottom: 22px; }
.ed-cmd {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  font-family: var(--mono); font-size: 14px; background: var(--bg-darker);
  border: 1px solid var(--border); border-radius: 10px; padding: 13px 16px; margin-bottom: 22px;
}
.ed-cmd code { color: var(--cyan); overflow-x: auto; white-space: nowrap; }
.ed-cmd .copy-btn { flex: none; background: var(--card-2); border: 1px solid var(--border); color: var(--gray-light); font-size: 12px; padding: 6px 12px; border-radius: 7px; cursor: pointer; font-family: var(--font); }
.ed-cmd .copy-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.ed-list { list-style: none; margin-bottom: 26px; }
.ed-list li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--gray-light); padding: 7px 0; }
.ed-list li svg { flex: none; width: 18px; height: 18px; color: var(--green); margin-top: 2px; }
.edition .btn { width: 100%; justify-content: center; }

/* ===========================================================
   PROVIDERS
   =========================================================== */
.prov-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; margin-top: 52px; }
.prov {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 22px; text-align: center; transition: transform .18s, border-color .18s;
}
.prov:hover { transform: translateY(-4px); border-color: var(--cyan); }
.prov .pico { width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 14px; display: grid; place-items: center; }
.prov.p1 .pico { background: rgba(217,119,87,.14); }
.prov.p2 .pico { background: rgba(0,229,255,.12); }
.prov.p3 .pico { background: rgba(147,51,234,.16); }
.prov.p4 .pico { background: rgba(0,255,148,.12); }
.prov .pico svg { width: 30px; height: 30px; }
.prov .pname { font-size: 15px; font-weight: 700; color: var(--white); }
.prov-note { margin-top: 30px; text-align: center; font-size: 14px; color: var(--gray-dim); }

/* ===========================================================
   FAQ
   =========================================================== */
.faq-list { margin-top: 44px; max-width: 860px; }
.faq-item { background: var(--card); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 14px; overflow: hidden; }
.faq-item summary {
  list-style: none; cursor: pointer; padding: 20px 24px; font-size: 17px; font-weight: 700;
  color: var(--white); display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--cyan); font-size: 24px; font-weight: 400; line-height: 1; flex: none; transition: transform .2s; }
.faq-item[open] summary::after { content: "−"; }
.faq-item:hover { border-color: var(--cyan); }
.faq-a { padding: 0 24px 22px; font-size: 15px; color: var(--gray); line-height: 1.7; }

/* ===========================================================
   DOWNLOAD
   =========================================================== */
.download { background: var(--bg-darker); }
.dl-os { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; max-width: 760px; margin: 44px auto 0; }
.dl-btn {
  display: flex; align-items: center; gap: 18px; background: var(--card);
  border: 1px solid var(--border); border-radius: 16px; padding: 24px 26px;
  cursor: pointer; transition: transform .18s, border-color .18s; text-align: left;
}
.dl-btn:hover { transform: translateY(-4px); border-color: var(--cyan); }
.dl-btn .os-ico { width: 44px; height: 44px; flex: none; color: var(--white); }
.dl-btn .os-ico svg { width: 44px; height: 44px; }
.dl-btn .dl-main { display: block; font-size: 17px; font-weight: 700; color: var(--white); }
.dl-btn .dl-sub { display: block; font-size: 13px; color: var(--gray-dim); margin-top: 2px; }
.dl-npm { max-width: 760px; margin: 40px auto 0; text-align: center; }
.dl-npm h3 { font-size: 17px; color: var(--gray-light); font-weight: 600; margin-bottom: 16px; }
.dl-npm-box {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 20px; font-family: var(--mono); font-size: 15px; text-align: left;
}
.dl-npm-box code { color: var(--cyan); }
.dl-npm-box .copy-btn { flex: none; background: var(--card-2); border: 1px solid var(--border); color: var(--gray-light); font-size: 13px; padding: 8px 16px; border-radius: 8px; cursor: pointer; font-family: var(--font); }
.dl-npm-box .copy-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.dl-version { text-align: center; margin-top: 26px; font-size: 13px; color: var(--gray-dim); }

/* ===========================================================
   FOOTER
   =========================================================== */
footer.site {
  border-top: 1px solid var(--border); padding: 56px 0 40px; background: var(--bg-darker);
}
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.foot-brand .brand { margin-bottom: 16px; }
.foot-brand p { font-size: 14px; color: var(--gray-dim); max-width: 380px; }
.foot-col h4 { font-size: 13px; font-weight: 700; color: var(--white); text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 16px; }
.foot-col a { display: block; font-size: 14px; color: var(--gray); padding: 6px 0; }
.foot-col a:hover { color: var(--cyan); }
.foot-bottom { margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--gray-dim); flex-wrap: wrap; gap: 14px; }
.foot-social { display: flex; gap: 16px; }
.foot-social a svg { width: 20px; height: 20px; color: var(--gray); }
.foot-social a:hover svg { color: var(--cyan); }

/* ===========================================================
   RESPONSIVE
   =========================================================== */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .stats-grid { grid-template-columns: repeat(2,1fr); margin-top: 28px; }
  .feat-grid { grid-template-columns: 1fr 1fr; }
  .tools-grid { grid-template-columns: 1fr; }
  .how-flow { grid-template-columns: 1fr; }
  .how-arrow { transform: rotate(90deg); justify-self: center; }
  .editions-grid { grid-template-columns: 1fr; }
  .prov-grid { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 28px; }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .scale-band { grid-template-columns: 1fr; gap: 28px; }
  .speckit { grid-template-columns: 1fr; gap: 24px; }
  .speckit-points { grid-template-columns: 1fr; }
  .focus-grid { grid-template-columns: 1fr; }
  .focus-arrow { transform: rotate(90deg); }
  .infra-grid { grid-template-columns: 1fr; }
  .cmd-row { grid-template-columns: 1fr; gap: 6px; }
}
@media (max-width: 620px) {
  section { padding: 64px 0; }
  .nav-right .btn-primary { display: none; }
  .stats-grid { grid-template-columns: 1fr; }
  .feat-grid { grid-template-columns: 1fr; }
  .prov-grid { grid-template-columns: 1fr; }
  .dl-os { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
}

/* mobile nav drawer */
.mobile-menu {
  display: none; flex-direction: column; gap: 4px; padding: 12px 24px 22px;
  background: var(--bg-darker); border-bottom: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 12px 0; font-size: 16px; color: var(--gray-light); border-bottom: 1px solid var(--border); }