/* ============================================================
   CORTEX — landing / marketing site
   Builds on cortex.css tokens (Osaka Jade). Link cortex.css first.
   ============================================================ */

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body.landing { overflow-y: auto; overflow-x: hidden; background: var(--bg); }

/* ambient grid + glow backdrop */
.bg-field { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.bg-grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(color-mix(in oklab, var(--border-strong) 40%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in oklab, var(--border-strong) 40%, transparent) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 0%, transparent 78%);
  opacity: 0.5;
}
.bg-glow { position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.22; }
.bg-glow.g1 { width: 620px; height: 620px; background: var(--accent); top: -240px; left: -120px; }
.bg-glow.g2 { width: 520px; height: 520px; background: var(--mode-select); top: 320px; right: -180px; opacity: 0.13; }

/* ---------- layout shell ---------- */
.wrap { width: min(1180px, 92vw); margin: 0 auto; }
section.band { padding: clamp(64px, 9vw, 128px) 0; position: relative; }
.band-head { max-width: 680px; margin-bottom: clamp(36px, 5vw, 64px); }
.band-head.center { margin-inline: auto; text-align: center; }
.kicker { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: var(--t-xs); font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); margin-bottom: 18px; }
.kicker .k-line { width: 26px; height: 1px; background: var(--accent-dim); }
h2.band-title { font-family: var(--font-read); font-size: clamp(30px, 4.4vw, 50px); font-weight: 500; line-height: 1.05; letter-spacing: -0.015em; color: var(--fg-bright); }
h2.band-title em { font-style: italic; color: var(--accent); }
.band-sub { margin-top: 18px; font-family: var(--font-read); font-size: clamp(16px, 2vw, 19px); line-height: 1.55; color: var(--fg-muted); }

/* ---------- top nav ---------- */
.lnav { position: fixed; top: 0; left: 0; right: 0; z-index: 60; height: 60px; display: flex; align-items: center; transition: background var(--dur), border-color var(--dur), backdrop-filter var(--dur); border-bottom: 1px solid transparent; }
.lnav.scrolled { background: color-mix(in oklab, var(--bg) 82%, transparent); backdrop-filter: blur(14px); border-bottom-color: var(--border); }
.lnav .wrap { display: flex; align-items: center; gap: 22px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--fg-bright); letter-spacing: 0.02em; text-decoration: none; }
.brand .glyph { width: 26px; height: 26px; border-radius: 7px; background: var(--accent); color: var(--accent-fg); display: grid; place-items: center; font-weight: 800; font-size: 15px; box-shadow: 0 0 0 1px color-mix(in oklab, var(--accent) 40%, transparent), 0 0 22px color-mix(in oklab, var(--accent) 35%, transparent); }
.lnav .nav-links { display: flex; gap: 4px; margin-left: 14px; }
.lnav .nav-links a { font-family: var(--font-mono); font-size: var(--t-sm); color: var(--fg-muted); text-decoration: none; padding: 7px 12px; border-radius: 6px; transition: color var(--dur-fast), background var(--dur-fast); }
.lnav .nav-links a:hover { color: var(--fg-bright); background: var(--surface-2); }
.lnav .nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.gh-star { display: inline-flex; align-items: center; gap: 7px; font-family: var(--font-mono); font-size: var(--t-sm); color: var(--fg-muted); text-decoration: none; padding: 7px 12px; border: 1px solid var(--border-strong); border-radius: 6px; transition: border-color var(--dur-fast), color var(--dur-fast); }
.gh-star:hover { border-color: var(--fg-faint); color: var(--fg-bright); }
.nav-toggle-btn { display: none; }

/* buttons (landing flavor) */
.cta { display: inline-flex; align-items: center; gap: 9px; height: 42px; padding: 0 20px; font-family: var(--font-mono); font-size: var(--t-md); font-weight: 600; border-radius: 8px; cursor: pointer; text-decoration: none; border: 1px solid transparent; transition: transform var(--dur-fast), background var(--dur-fast), border-color var(--dur-fast), box-shadow var(--dur); white-space: nowrap; }
.cta--primary { color: var(--accent-fg); background: var(--accent); box-shadow: 0 0 0 1px color-mix(in oklab, var(--accent) 50%, transparent), 0 8px 30px color-mix(in oklab, var(--accent) 28%, transparent); }
.cta--primary:hover { transform: translateY(-1px); box-shadow: 0 0 0 1px var(--accent), 0 12px 38px color-mix(in oklab, var(--accent) 38%, transparent); }
.cta--ghost { color: var(--fg-bright); background: var(--surface-2); border-color: var(--border-strong); }
.cta--ghost:hover { border-color: var(--fg-faint); background: var(--surface-3); }
.cta--sm { height: 34px; padding: 0 14px; font-size: var(--t-sm); }

/* ---------- hero ---------- */
.hero { padding-top: 132px; padding-bottom: clamp(48px, 7vw, 96px); position: relative; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(28px, 4vw, 60px); align-items: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 9px; padding: 5px 7px 5px 12px; border: 1px solid var(--border-strong); border-radius: 999px; font-family: var(--font-mono); font-size: var(--t-xs); color: var(--fg-muted); margin-bottom: 24px; background: var(--surface); }
.hero-badge .pill { font-size: 9px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); padding: 2px 8px; border: 1px solid var(--accent-dim); border-radius: 999px; }
.hero h1 { font-family: var(--font-read); font-size: clamp(38px, 6vw, 72px); font-weight: 500; line-height: 1.02; letter-spacing: -0.02em; color: var(--fg-bright); }
.hero h1 em { font-style: italic; color: var(--accent); }
.hero-lede { margin-top: 22px; max-width: 520px; font-family: var(--font-read); font-size: clamp(17px, 2.2vw, 21px); line-height: 1.55; color: var(--fg-muted); }
.hero-cta { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-meta { margin-top: 22px; display: flex; gap: 18px; flex-wrap: wrap; font-family: var(--font-mono); font-size: var(--t-xs); color: var(--fg-faint); }
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ok); }

/* hero app window mock */
.appwin { border: 1px solid var(--border-strong); border-radius: 12px; overflow: hidden; background: var(--surface); box-shadow: var(--shadow-pop); transform: perspective(1600px) rotateY(-9deg) rotateX(3deg); transform-origin: center; }
.appwin-bar { display: flex; align-items: center; gap: 8px; height: 34px; padding: 0 12px; background: var(--bg-sunken); border-bottom: 1px solid var(--border); }
.appwin-bar .tl { display: flex; gap: 6px; }
.appwin-bar .tl span { width: 11px; height: 11px; border-radius: 50%; }
.appwin-bar .addr { margin: 0 auto; font-family: var(--font-mono); font-size: var(--t-2xs); color: var(--fg-faint); }
.appwin-body { display: grid; grid-template-columns: 116px 1fr; min-height: 340px; }
.aw-side { background: var(--bg-sunken); border-right: 1px solid var(--border); padding: 10px 8px; display: flex; flex-direction: column; gap: 6px; }
.aw-side .aw-sub { display: flex; align-items: center; gap: 7px; font-family: var(--font-mono); font-size: 10px; color: var(--fg-muted); padding: 5px 7px; border-radius: 5px; }
.aw-side .aw-sub.on { background: var(--surface-3); color: var(--fg-bright); }
.aw-side .aw-sub .d { width: 5px; height: 5px; border-radius: 50%; flex: none; }
.aw-main { padding: 16px 18px; position: relative; overflow: hidden; }
.aw-eyebrow { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
.aw-h { font-family: var(--font-read); font-size: 22px; color: var(--fg-bright); font-weight: 600; margin: 5px 0 12px; }
.aw-sec { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin: 12px 0 6px; }
.aw-line { height: 7px; border-radius: 3px; background: var(--surface-3); margin-bottom: 6px; }
.aw-diffline { font-family: var(--font-read); font-size: 12px; line-height: 1.45; padding: 3px 8px; border-radius: 4px; margin-bottom: 3px; }
.aw-diffline.add { background: var(--diff-add-bg); color: var(--fg); border-left: 2px solid var(--diff-add-bd); }
.aw-diffline.del { background: var(--diff-del-bg); color: var(--fg-muted); text-decoration: line-through; text-decoration-color: var(--diff-del-bd); border-left: 2px solid var(--diff-del-bd); }
.aw-status { display: flex; align-items: stretch; height: 22px; font-family: var(--font-mono); font-size: 10px; border-top: 1px solid var(--border); background: var(--bg-sunken); }
.aw-status .mb { display: flex; align-items: center; padding: 0 10px; font-weight: 700; letter-spacing: 0.1em; color: var(--accent-fg); background: var(--accent); transition: background var(--dur); }
.aw-status .sg { display: flex; align-items: center; padding: 0 10px; color: var(--fg-muted); border-right: 1px solid var(--border); }
.aw-status .sp { flex: 1; }

/* floating cmd palette accent on hero */
.hero-cmd { position: absolute; right: -8px; bottom: -22px; width: 280px; background: var(--surface-2); border: 1px solid var(--border-strong); border-radius: 10px; box-shadow: var(--shadow-pop); overflow: hidden; }
.hero-cmd .hc-in { display: flex; align-items: center; gap: 8px; height: 36px; padding: 0 12px; border-bottom: 1px solid var(--border); font-family: var(--font-mono); font-size: var(--t-sm); }
.hero-cmd .hc-in .lead { color: var(--accent); font-weight: 700; }
.hero-cmd .hc-in .cur { color: var(--fg-bright); }
.hero-cmd .hc-item { display: flex; align-items: center; gap: 9px; padding: 7px 12px; font-family: var(--font-mono); font-size: var(--t-xs); color: var(--fg-muted); }
.hero-cmd .hc-item.sel { background: var(--surface-3); color: var(--fg-bright); }
.hero-cmd .hc-item .k { margin-left: auto; font-size: 9px; color: var(--fg-faint); }
.blink { animation: lblink 1.05s steps(1) infinite; color: var(--accent); }
@keyframes lblink { 50% { opacity: 0; } }

/* ---------- logo strip ---------- */
.proof { padding: 28px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.proof .wrap { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; justify-content: center; }
.proof .pf-label { font-family: var(--font-mono); font-size: var(--t-2xs); letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-faint); }
.proof .pf-item { font-family: var(--font-mono); font-size: var(--t-sm); color: var(--fg-muted); display: inline-flex; align-items: center; gap: 8px; }

/* ---------- feature grid ---------- */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feat-grid .feat.span2 { grid-column: span 2; }
.feat { position: relative; padding: 22px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; transition: border-color var(--dur), transform var(--dur), background var(--dur); }
.feat:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.feat .f-ico { width: 38px; height: 38px; border-radius: 9px; background: var(--surface-2); border: 1px solid var(--border-strong); display: grid; place-items: center; color: var(--accent); margin-bottom: 16px; }
.feat h3 { font-family: var(--font-read); font-size: 21px; font-weight: 600; color: var(--fg-bright); margin-bottom: 8px; letter-spacing: -0.01em; }
.feat p { font-size: var(--t-md); line-height: 1.55; color: var(--fg-muted); }
.feat p .hl { color: var(--fg-bright); font-weight: 500; }
.feat-demo { margin-top: 16px; }

/* mini demos inside features */
.kbcluster { display: flex; flex-wrap: wrap; gap: 6px; }
.kbcluster .kc { display: inline-flex; align-items: center; justify-content: center; min-width: 26px; height: 26px; padding: 0 8px; font-family: var(--font-mono); font-size: var(--t-xs); font-weight: 600; color: var(--fg-muted); background: var(--surface-2); border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 6px; }
.kbcluster .kc.accent { color: var(--accent); border-color: var(--accent-dim); }
.tree-mini { font-family: var(--font-mono); font-size: var(--t-xs); }
.tree-mini .tm-row { display: flex; align-items: center; gap: 7px; padding: 3px 6px; border-radius: 5px; color: var(--fg-muted); }
.tree-mini .tm-row.on { background: var(--surface-2); color: var(--fg-bright); }
.tree-mini .tm-row .d { width: 5px; height: 5px; border-radius: 50%; }
.tree-mini .indent { padding-left: 16px; }
.tree-mini .indent2 { padding-left: 30px; }
.wave-mini { display: flex; align-items: center; gap: 3px; height: 44px; }
.wave-mini i { flex: 1; background: var(--accent); border-radius: 999px; opacity: 0.8; }
.wave-mini.live i { animation: wv 1.1s ease-in-out infinite; }
@keyframes wv { 0%,100% { transform: scaleY(0.3); } 50% { transform: scaleY(1); } }
.pod-mini { display: flex; align-items: center; gap: 12px; }
.pod-mini .pm-art { width: 46px; height: 46px; border-radius: 9px; background: linear-gradient(150deg, var(--accent-dim), var(--surface-3)); display: grid; place-items: center; flex: none; }
.pod-mini .pm-bars { display: flex; gap: 2px; align-items: center; height: 22px; }
.pod-mini .pm-bars i { width: 3px; background: var(--accent); border-radius: 2px; animation: wv 0.9s ease-in-out infinite; }
.themes-mini { display: flex; gap: 8px; }
.themes-mini .th { flex: 1; height: 54px; border-radius: 8px; border: 1px solid var(--border-strong); position: relative; overflow: hidden; cursor: default; }
.themes-mini .th .sw { position: absolute; top: 8px; left: 8px; width: 16px; height: 16px; border-radius: 50%; }

/* ---------- showcase (diff) ---------- */
.showcase { display: grid; grid-template-columns: 1fr 1.05fr; gap: clamp(28px, 4vw, 56px); align-items: center; }
.showcase.flip { grid-template-columns: 1.05fr 1fr; }
.show-card { background: var(--surface); border: 1px solid var(--border-strong); border-radius: 12px; box-shadow: var(--shadow-2); overflow: hidden; }
.show-card .sc-head { display: flex; align-items: center; gap: 10px; padding: 12px 15px; border-bottom: 1px solid var(--border); }
.show-card .sc-head .sc-t { font-family: var(--font-mono); font-size: var(--t-sm); color: var(--fg-bright); }
.show-card .sc-head .seg { margin-left: auto; display: inline-flex; padding: 2px; background: var(--bg-sunken); border: 1px solid var(--border-strong); border-radius: 6px; }
.show-card .sc-head .seg b { font-family: var(--font-mono); font-size: 10px; font-weight: 500; padding: 3px 9px; border-radius: 4px; color: var(--fg-muted); }
.show-card .sc-head .seg b.on { background: var(--surface-3); color: var(--fg-bright); }
.diff-body-l { padding: 12px; display: flex; flex-direction: column; gap: 4px; }
.dl { display: flex; gap: 8px; padding: 6px 10px; border-radius: 5px; font-family: var(--font-read); font-size: 14px; line-height: 1.45; }
.dl .g { font-family: var(--font-mono); color: var(--fg-faint); flex: none; width: 10px; }
.dl.add { background: var(--diff-add-bg); } .dl.add .g { color: var(--ok); }
.dl.del { background: var(--diff-del-bg); color: var(--fg-muted); } .dl.del .txt { text-decoration: line-through; text-decoration-color: var(--diff-del-bd); }
.dl .txt { color: var(--fg); }
.show-card .sc-foot { display: flex; align-items: center; gap: 8px; padding: 11px 15px; border-top: 1px solid var(--border); background: var(--bg-sunken); }
.show-list { display: flex; flex-direction: column; gap: 18px; }
.show-list .si { display: flex; gap: 14px; }
.show-list .si .si-n { width: 30px; height: 30px; border-radius: 8px; background: var(--surface-2); border: 1px solid var(--border-strong); display: grid; place-items: center; font-family: var(--font-mono); font-size: var(--t-sm); color: var(--accent); flex: none; }
.show-list .si .si-t { font-size: var(--t-md); color: var(--fg-bright); font-weight: 600; margin-bottom: 4px; }
.show-list .si .si-d { font-size: var(--t-sm); color: var(--fg-muted); line-height: 1.5; }

/* ---- recorder showcase card ---- */
.rec-card .sc-head .rec-live { display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-mono); font-size: var(--t-sm); color: var(--fg-bright); }
.rec-card .rec-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--err); box-shadow: 0 0 0 4px color-mix(in oklab, var(--err) 20%, transparent); animation: recpulse 1.4s steps(1) infinite; }
.rec-card .rec-time { margin-left: auto; color: var(--fg-muted); letter-spacing: 0.06em; font-size: var(--t-sm); }
.rec-card .rec-body { padding: 18px 15px 8px; }
.rec-wave { display: flex; align-items: center; gap: 3px; height: 62px; margin-bottom: 14px; }
.rec-wave i { flex: 1; min-width: 2px; background: var(--accent); border-radius: 999px; opacity: 0.85; }
.rec-wave.live i { animation: wv 1.05s ease-in-out infinite; }
.rec-transcript { display: flex; flex-direction: column; gap: 8px; padding: 13px 14px; background: var(--bg-sunken); border: 1px solid var(--border); border-radius: 8px; }
.rec-transcript .rt-line { font-family: var(--font-read); font-size: 14px; line-height: 1.5; color: var(--fg-muted); margin: 0; }
.rec-transcript .rt-line.cur { color: var(--fg-bright); }

/* ---- brand logo (transparent Cortex mark replaces the C glyph) ---- */
.brand img.glyph { background: none; box-shadow: none; border-radius: 0; object-fit: contain; padding: 0; display: block; }

/* ---------- themes band ---------- */
.theme-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.theme-card { border-radius: 12px; border: 1px solid var(--border-strong); overflow: hidden; }
.theme-card .tc-top { height: 120px; position: relative; padding: 14px; display: flex; flex-direction: column; justify-content: space-between; }
.theme-card .tc-dots { display: flex; gap: 6px; }
.theme-card .tc-dots span { width: 14px; height: 14px; border-radius: 50%; }
.theme-card .tc-bars { display: flex; flex-direction: column; gap: 5px; }
.theme-card .tc-bars i { height: 6px; border-radius: 3px; }
.theme-card .tc-foot { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; background: var(--surface); border-top: 1px solid var(--border); font-family: var(--font-mono); font-size: var(--t-sm); color: var(--fg-bright); }
.theme-card .tc-foot .tag { font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-faint); }

/* ---------- steps / how it works ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step; }
.step { padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); position: relative; }
.step .s-n { font-family: var(--font-mono); font-size: var(--t-xs); color: var(--accent); font-weight: 600; }
.step h4 { font-family: var(--font-read); font-size: 18px; color: var(--fg-bright); font-weight: 600; margin: 8px 0 6px; }
.step p { font-size: var(--t-sm); line-height: 1.5; color: var(--fg-muted); }
.step .s-arrow { position: absolute; right: -11px; top: 50%; transform: translateY(-50%); color: var(--border-strong); z-index: 2; }

/* ---------- about ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(28px, 4vw, 56px); align-items: start; }
.about-stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.about-stat { padding: 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.about-stat .n { font-family: var(--font-read); font-size: 34px; color: var(--accent); font-weight: 500; line-height: 1; }
.about-stat .l { font-family: var(--font-mono); font-size: var(--t-xs); color: var(--fg-muted); margin-top: 8px; }
.about-body p { font-family: var(--font-read); font-size: 17px; line-height: 1.65; color: var(--fg-muted); margin-bottom: 16px; }
.about-body p .hl { color: var(--fg-bright); }
.values { margin-top: 22px; display: flex; flex-direction: column; gap: 12px; }
.value { display: flex; gap: 12px; align-items: flex-start; }
.value .v-ic { color: var(--accent); margin-top: 2px; flex: none; }
.value .v-t { font-size: var(--t-md); color: var(--fg-bright); font-weight: 500; }
.value .v-d { font-size: var(--t-sm); color: var(--fg-muted); line-height: 1.5; }

/* ---------- download ---------- */
.dl-card { border: 1px solid var(--border-strong); border-radius: 16px; background: linear-gradient(180deg, var(--surface), var(--bg-sunken)); padding: clamp(28px, 4vw, 48px); text-align: center; position: relative; overflow: hidden; }
.dl-card::before { content: ""; position: absolute; inset: -1px; background: radial-gradient(circle at 50% -20%, color-mix(in oklab, var(--accent) 22%, transparent), transparent 60%); pointer-events: none; }
.dl-platforms { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 32px; max-width: 760px; margin-inline: auto; }
.plat { padding: 22px 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); display: flex; flex-direction: column; align-items: center; gap: 10px; position: relative; }
.plat.primary { border-color: var(--accent-dim); box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 12%, transparent); }
.plat .p-ic { color: var(--fg-bright); }
.plat .p-name { font-family: var(--font-mono); font-size: var(--t-md); color: var(--fg-bright); }
.plat .p-meta { font-family: var(--font-mono); font-size: var(--t-2xs); color: var(--fg-faint); }
.plat .p-badge { position: absolute; top: 10px; right: 10px; font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); border: 1px solid var(--accent-dim); border-radius: 999px; padding: 2px 7px; }
.plat .p-badge.soon { color: var(--fg-faint); border-color: var(--border-strong); }
.dl-install { margin-top: 26px; max-width: 560px; margin-inline: auto; }
.codeline { display: flex; align-items: center; gap: 10px; padding: 12px 14px; background: var(--bg-sunken); border: 1px solid var(--border-strong); border-radius: 8px; font-family: var(--font-mono); font-size: var(--t-sm); color: var(--fg); }
.codeline .pfx { color: var(--accent); }
.codeline .copy { margin-left: auto; color: var(--fg-faint); cursor: pointer; background: none; border: none; padding: 4px; border-radius: 5px; }
.codeline .copy:hover { color: var(--fg-bright); background: var(--surface-2); }

/* ---------- download: clickable platform cards ---------- */
.plat { cursor: pointer; transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.plat:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--shadow-2); }
.plat.is-active { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 16%, transparent); }
.plat.is-active .p-name { color: var(--accent); }
.plat.is-active .p-ic { color: var(--accent); }
.codeline { transition: border-color var(--dur) var(--ease); }
.codeline.flash { animation: cmdflash 420ms var(--ease); }
@keyframes cmdflash {
  0% { border-color: var(--accent); background: color-mix(in oklab, var(--accent) 12%, var(--bg-sunken)); }
  100% { border-color: var(--border-strong); background: var(--bg-sunken); }
}

/* ---------- docs preview cards ---------- */
.doc-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.doc-card { padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); text-decoration: none; display: block; transition: border-color var(--dur), transform var(--dur); }
.doc-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.doc-card .dc-ic { color: var(--accent); margin-bottom: 12px; }
.doc-card h4 { font-family: var(--font-read); font-size: 18px; color: var(--fg-bright); font-weight: 600; margin-bottom: 6px; }
.doc-card p { font-size: var(--t-sm); color: var(--fg-muted); line-height: 1.5; }
.doc-card .dc-link { margin-top: 12px; font-family: var(--font-mono); font-size: var(--t-xs); color: var(--accent); display: inline-flex; align-items: center; gap: 6px; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(28px, 4vw, 56px); align-items: start; }
.contact-card { padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); margin-bottom: 12px; display: flex; gap: 13px; align-items: flex-start; }
.contact-card .cc-ic { width: 36px; height: 36px; border-radius: 9px; background: var(--surface-2); border: 1px solid var(--border-strong); display: grid; place-items: center; color: var(--accent); flex: none; }
.contact-card .cc-t { font-size: var(--t-md); color: var(--fg-bright); font-weight: 500; }
.contact-card .cc-d { font-size: var(--t-sm); color: var(--fg-muted); margin-top: 3px; }
.contact-card a { color: var(--accent); text-decoration: none; }
.form { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 22px; }
.form .fld { margin-bottom: 14px; }
.form label { display: block; font-family: var(--font-mono); font-size: var(--t-2xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-faint); margin-bottom: 7px; }
.form textarea.input { min-height: 110px; resize: vertical; padding: 10px 11px; font-family: var(--font-read); font-size: var(--r-sm); line-height: 1.5; }
.form .form-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 4px; }
.form .form-ok { font-family: var(--font-mono); font-size: var(--t-xs); color: var(--ok); display: none; align-items: center; gap: 6px; }
.form .form-ok.show { display: inline-flex; }

/* ---------- footer ---------- */
.lfoot { border-top: 1px solid var(--border); padding: 56px 0 32px; background: var(--bg-sunken); }
.lfoot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 28px; }
.lfoot .f-brand p { font-size: var(--t-sm); color: var(--fg-muted); line-height: 1.55; max-width: 280px; margin-top: 14px; }
.lfoot .f-col h5 { font-family: var(--font-mono); font-size: var(--t-2xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-faint); margin-bottom: 14px; }
.lfoot .f-col a { display: block; font-family: var(--font-mono); font-size: var(--t-sm); color: var(--fg-muted); text-decoration: none; padding: 5px 0; transition: color var(--dur-fast); }
.lfoot .f-col a:hover { color: var(--fg-bright); }
.lfoot-bottom { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--border); font-family: var(--font-mono); font-size: var(--t-xs); color: var(--fg-faint); flex-wrap: wrap; }
.lfoot-bottom .fb-right { display: flex; gap: 16px; }
.lfoot-bottom a { color: var(--fg-faint); text-decoration: none; }
.lfoot-bottom a:hover { color: var(--fg-muted); }

/* ---------- scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.06s; } .reveal.d2 { transition-delay: 0.12s; } .reveal.d3 { transition-delay: 0.18s; } .reveal.d4 { transition-delay: 0.24s; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .feat-grid { grid-template-columns: 1fr 1fr; }
  .feat-grid .feat.span2 { grid-column: span 2; }
  .showcase, .showcase.flip, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .theme-cards, .doc-cards { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .step .s-arrow { display: none; }
  .dl-platforms { grid-template-columns: 1fr; }
  .lfoot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .lnav .nav-links { display: none; }
  .feat-grid { grid-template-columns: 1fr; }
  .feat-grid .feat.span2 { grid-column: span 1; }
  .steps { grid-template-columns: 1fr; }
  .lfoot-grid { grid-template-columns: 1fr; }
  .gh-star { display: none; }
}