:root {
  --bg: #0b0c10;
  --surface: #0f1115;
  --elev: #151823;
  --text: #e6e7eb;
  --muted: #9aa3b2;
  --primary: #4f8cff;
  --primary-600: #3b82f6;
  --accent: #22d3ee;
  --ring: #93c5fd;
  --ok: #22c55e;
  --warn: #f59e0b;
  --err: #ef4444;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --shadow-sm: 0 6px 18px rgba(0,0,0,.28);
  --container: 1120px;
  --step--1: clamp(.78rem, .74rem + .2vw, .9rem);
  --step-0: clamp(.95rem, .9rem + .3vw, 1.05rem);
  --step-1: clamp(1.2rem, 1.1rem + .6vw, 1.5rem);
  --step-2: clamp(1.5rem, 1.4rem + .9vw, 2rem);
  --step-3: clamp(2rem, 1.8rem + 1.5vw, 2.6rem);
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fb; --surface: #ffffff; --elev: #f3f4f7;
    --text: #0f172a; --muted: #5b6472; --ring: #60a5fa;
  }
}
* { box-sizing: border-box }
html { color-scheme: light dark; scroll-behavior: smooth }
body {
  margin: 0; color: var(--text);
  background:
    radial-gradient(1200px 600px at 20% -10%, color-mix(in oklab, var(--primary) 22%, transparent), transparent 62%),
    radial-gradient(900px 500px at 100% 0%, color-mix(in oklab, var(--accent) 16%, transparent), transparent 60%),
    var(--bg);
  font: 500 var(--step-0)/1.65 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Hiragino Sans", "Noto Sans JP", sans-serif;
}
/* language-aware font stacks (best-effort, system fonts preferred) */
html[lang^="zh"] body { font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Noto Sans TC", "WenQuanYi Micro Hei", sans-serif; }
html[lang="ko"] body { font-family: ui-sans-serif, system-ui, -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", Segoe UI, Roboto, sans-serif; }
html[lang="ar"] body { font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, "Noto Naskh Arabic", "Geeza Pro", "Amiri", sans-serif; }
html[lang="th"] body { font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, "Tahoma", "Noto Sans Thai", sans-serif; }
.container { width: min(100% - 32px, var(--container)); margin-inline: auto; }
.site-header {
  position: sticky; top: 0; z-index: 50; backdrop-filter: saturate(140%) blur(8px);
  background: color-mix(in oklab, var(--bg) 78%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--text) 8%, transparent);
}
.scroll-progress { height: 2px; width: var(--p, 0%); background: linear-gradient(90deg, var(--accent), var(--primary)); box-shadow: 0 0 12px color-mix(in oklab, var(--accent) 40%, transparent); transition: width .08s linear }
.navbar { display: flex; align-items: center; gap: 16px; padding: 12px 0; }
.logo { display:flex; align-items:center; gap:10px; text-decoration:none; color:var(--text); font-weight:700; letter-spacing:.2px }
.logo-mark { width: 28px; height: 28px; border-radius: 10px; background: url('/app-icons/x4logo.png') center/cover no-repeat; box-shadow: 0 6px 18px rgba(79,140,255,.35) }
.nav { margin-left:auto; display:flex; gap:14px }
.nav a { color: var(--muted); text-decoration: none; padding: 8px 10px; border-radius: 10px; transition: background .15s ease, color .15s ease }
.nav a:hover { background: color-mix(in oklab, var(--elev) 65%, transparent); color: var(--text) }
.site-main { padding: 28px 0 64px }
.subnav { display:flex; align-items:center; gap:10px; margin: 0 0 12px }
.back-link { display:inline-flex; align-items:center; gap:8px }
.back-link .ico { width:18px; height:18px; display:inline-grid; place-items:center }
.site-footer { border-top: 1px solid color-mix(in oklab, var(--text) 10%, transparent); padding: 20px 0; color: var(--muted) }
.foot-status { display:flex; gap:8px; flex-wrap:wrap; margin-bottom:8px }
.foot-status .chip { display:inline-flex; align-items:center; gap:8px; padding:6px 10px; border-radius:999px; border:1px solid color-mix(in oklab, var(--text) 12%, transparent); background: color-mix(in oklab, var(--elev) 70%, transparent) }
.section { padding: 26px 0 }
.h1 { font-size: var(--step-3); letter-spacing: .2px; font-weight: 800; margin: 8px 0; }
.h2 { font-size: var(--step-2); letter-spacing: .2px; font-weight: 800; margin: 8px 0 12px; position: relative }
.h1, .h2 { font-variant-numeric: tabular-nums }
.fx-iris { position: relative; background: none; padding-bottom: 0; animation: none }
@keyframes irisSlide { 0% { background-position: 0 100% } 100% { background-position: 200% 100% } }
.h1::after, .h2::after { content:""; display:block; height:2px; width: 80px; margin-top:8px; background: linear-gradient(90deg, color-mix(in oklab, var(--accent) 70%, transparent), transparent) }
.h2::before { content:""; position:absolute; left:0; bottom:-6px; width:6px; height:6px; border-radius:999px; background: color-mix(in oklab, var(--ring) 65%, transparent) }
.lead { font-size: var(--step-1); color: var(--muted); max-width: 68ch }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(12, 1fr) }
.card { grid-column: span 12; background: linear-gradient(180deg, color-mix(in oklab, var(--surface) 94%, transparent), color-mix(in oklab, var(--elev) 92%, transparent));
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; transition: transform .12s ease, box-shadow .15s ease, border-color .15s ease }
.card:hover { transform: translateY(-1px); box-shadow: 0 12px 36px rgba(0,0,0,.38); border-color: color-mix(in oklab, var(--text) 14%, transparent) }
@container (min-width: 720px) { .card-sm { grid-column: span 6 } }
@container (min-width: 980px) { .card-sm { grid-column: span 4 } }
/* ensure tool wrapper participates in grid sizing */
.tool-grid .tool-item { grid-column: span 12 }
@container (min-width: 720px) { .tool-grid .tool-item { grid-column: span 6 } }
@container (min-width: 980px) { .tool-grid .tool-item { grid-column: span 4 } }
.label { display:block; margin: 6px 0 6px; font-weight: 600; letter-spacing: .1px }
.input, .select, .textarea {
  width: 100%; padding: 12px 14px; border-radius: 12px; border: 1px solid color-mix(in oklab, var(--text) 12%, transparent);
  background: color-mix(in oklab, var(--surface) 92%, transparent); color: var(--text); outline: none;
  transition: box-shadow .15s ease, border-color .15s ease, background .15s ease
}
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--ring); box-shadow: 0 0 0 3px color-mix(in oklab, var(--ring) 35%, transparent)
}
.textarea { resize: vertical; min-height: 120px; max-height: 60vh; }
.input::placeholder, .textarea::placeholder { color: color-mix(in oklab, var(--muted) 80%, transparent) }
.help { color: var(--muted); font-size: var(--step--1) }
.btn { -webkit-tap-highlight-color: transparent; appearance:none; user-select:none; cursor:pointer; border:1px solid transparent; border-radius: 12px; padding: 10px 14px; font-weight: 700; transition: transform .06s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease }
.btn:active { transform: translateY(1px) }
.btn-primary { background: linear-gradient(160deg, var(--primary), var(--primary-600)); color: white; box-shadow: 0 10px 20px rgba(79,140,255,.35) }
.btn-primary:hover { box-shadow: 0 12px 24px rgba(79,140,255,.4) }
.btn-ghost { background: color-mix(in oklab, var(--elev) 70%, transparent); color: var(--text); border-color: color-mix(in oklab, var(--text) 12%, transparent) }
.btn-ghost:hover { border-color: color-mix(in oklab, var(--text) 20%, transparent) }
.row { display:grid; gap:12px; grid-template-columns: 1fr 1fr }
@media (max-width: 720px){ .row{ grid-template-columns: 1fr } }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Noto Sans Mono", monospace }
.badge { display:inline-block; padding: 6px 10px; border-radius: 999px; background: color-mix(in oklab, var(--elev) 70%, transparent); color: var(--muted); font-weight:700; font-size: var(--step--1) }
.toast-wrap { position: fixed; right: 16px; bottom: 16px; display: grid; gap: 8px; z-index: 100 }
.toast { background: var(--surface); border:1px solid color-mix(in oklab, var(--text) 12%, transparent); border-radius: 12px; padding: 10px 14px; box-shadow: var(--shadow); color: var(--text); opacity: 0; transform: translateY(6px); transition: opacity .18s ease, transform .18s ease }
.toast.show { opacity: 1; transform: translateY(0) }
.toast.ok { border-color: color-mix(in oklab, var(--ok) 40%, transparent) }
.toast.warn { border-color: color-mix(in oklab, var(--warn) 40%, transparent) }
.toast.err { border-color: color-mix(in oklab, var(--err) 45%, transparent) }

/* HUD */
.hud { position: fixed; right: 16px; top: 56px; display: inline-grid; grid-auto-flow: row; gap: 6px; z-index: 80; opacity:.92 }
.hud-item { display:inline-flex; align-items:center; gap:8px; padding:6px 10px; border-radius:999px; background: color-mix(in oklab, var(--elev) 70%, transparent); border:1px solid color-mix(in oklab, var(--text) 12%, transparent); box-shadow: var(--shadow-sm); backdrop-filter: blur(4px) }
.hud-item .k { color: var(--muted); font-size: var(--step--1) }
.hud-item .v { font-weight: 800 }
.hud-item .dot { width:8px; height:8px; border-radius:999px; background: color-mix(in oklab, var(--text) 30%, transparent) }
.hud-item .dot.ok { background: var(--ok) }

/* utility */
.toolbar { display:flex; flex-wrap:wrap; gap:10px }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0 }

/* command palette */
.cmdk { position: fixed; inset: 0; display: grid; place-items: center; background: color-mix(in oklab, var(--bg) 40%, transparent); backdrop-filter: blur(6px); z-index: 90; opacity: 0; pointer-events: none; transition: opacity .12s ease }
.cmdk[data-open="true"] { opacity: 1; pointer-events: auto }
.cmdk-panel { width: min(720px, 92vw); border-radius: 16px; background: color-mix(in oklab, var(--surface) 92%, transparent); border: 1px solid color-mix(in oklab, var(--text) 12%, transparent); box-shadow: var(--shadow); overflow: hidden }
.cmdk-input { width: 100%; padding: 14px 16px; border: 0; outline: none; background: transparent; color: var(--text); font: inherit; border-bottom: 1px solid color-mix(in oklab, var(--text) 10%, transparent) }
.cmdk-list { max-height: 50vh; overflow: auto; display: grid }
.cmdk-item { display: grid; gap: 4px; padding: 12px 16px; text-decoration: none; color: inherit; border-bottom: 1px solid color-mix(in oklab, var(--text) 8%, transparent) }
.cmdk-item:hover { background: color-mix(in oklab, var(--elev) 70%, transparent) }
.cmdk-item .t { font-weight: 800 }
.cmdk-item .d { color: var(--muted); font-size: var(--step--1) }

/* help overlay */
.help { position: fixed; inset: 0; display: grid; place-items: center; background: color-mix(in oklab, var(--bg) 40%, transparent); backdrop-filter: blur(6px); z-index: 85; opacity: 0; pointer-events: none; transition: opacity .12s ease }
.help[data-open="true"] { opacity: 1; pointer-events: auto }
.help-panel { width: min(560px, 92vw); border-radius: 16px; background: color-mix(in oklab, var(--surface) 92%, transparent); border: 1px solid color-mix(in oklab, var(--text) 12%, transparent); box-shadow: var(--shadow); padding: 16px }
.help-panel h3 { margin: 0 0 8px 0 }
.help-panel ul { margin: 0; padding-left: 18px; display:grid; gap:6px }
.kbd { display:inline-grid; place-items:center; min-width:24px; height:24px; padding:0 6px; border:1px solid color-mix(in oklab, var(--text) 18%, transparent); border-bottom-width:2px; border-radius:8px; background: color-mix(in oklab, var(--surface) 86%, transparent); font-weight:700 }

/* chips */
.chips { display:flex; flex-wrap:wrap; gap:8px }
.chip { display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px; border:1px solid color-mix(in oklab, var(--text) 12%, transparent); background: color-mix(in oklab, var(--elev) 70%, transparent); cursor:pointer; user-select:none; transition: border-color .15s ease, background .15s ease, color .15s ease }
.chip input { display:none }
.chip[data-active="true"], .chip:has(input:checked) { border-color: color-mix(in oklab, var(--ring) 55%, transparent); color: var(--text); background: color-mix(in oklab, var(--elev) 55%, transparent); }
.chip .dot { width:10px; height:10px; border-radius:999px; background: color-mix(in oklab, var(--text) 35%, transparent) }
.chip:has(input:checked) .dot { background: var(--ring) }
.chip .count { color: var(--muted); font-weight: 700; font-size: var(--step--1); padding: 2px 8px; border-radius: 999px; background: color-mix(in oklab, var(--elev) 80%, transparent) }

/* segmented control */
.seg { display:inline-grid; grid-auto-flow:column; gap:0; border:1px solid color-mix(in oklab, var(--text) 12%, transparent); border-radius:12px; overflow:hidden; background: color-mix(in oklab, var(--elev) 70%, transparent); max-width:100%; overflow-x:auto; -webkit-overflow-scrolling: touch }
.seg input { display:none }
.seg label { padding:10px 14px; cursor:pointer; font-weight:700; color: var(--muted); }
.seg label:hover { background: color-mix(in oklab, var(--elev) 55%, transparent); color: var(--text) }
.seg input:checked + label { background: linear-gradient(160deg, var(--primary), var(--primary-600)); color:white }

/* switch */
.switch { display:inline-flex; align-items:center; gap:10px; cursor:pointer; user-select:none }
.switch input { display:none }
.switch .track { width:46px; height:26px; background: color-mix(in oklab, var(--elev) 70%, transparent); border:1px solid color-mix(in oklab, var(--text) 12%, transparent); border-radius:999px; position:relative; transition: background .15s ease, border-color .15s ease }
.switch .knob { width:20px; height:20px; border-radius:999px; background:white; position:absolute; top:2px; left:2px; transition: left .15s ease, background .15s ease; box-shadow: var(--shadow-sm) }
.switch input:checked + .track { background: color-mix(in oklab, var(--ring) 30%, transparent); border-color: var(--ring) }
.switch input:checked + .track .knob { left:24px }

/* preview and code */
.preview { padding:12px; border-radius:12px; border:1px solid color-mix(in oklab, var(--text) 12%, transparent); background: color-mix(in oklab, var(--surface) 90%, transparent); min-height:120px; overflow:auto; white-space: pre-wrap }
.preview mark { background: color-mix(in oklab, var(--accent) 35%, transparent); color: inherit; padding:0 2px; border-radius:4px }
.codeblock { padding:12px; border-radius:12px; border:1px solid color-mix(in oklab, var(--text) 12%, transparent); background: color-mix(in oklab, var(--surface) 90%, transparent); overflow:auto }
.codeblock .k { color:#93c5fd }
.codeblock .s { color:#86efac }
.codeblock .n { color:#fca5a5 }
.codeblock .b { color:#facc15 }
.codeblock .p { color: color-mix(in oklab, var(--text) 55%, transparent) }

/* stat card */
.stat { display:grid; grid-template-columns: 1fr auto; align-items:center; gap:12px; padding:16px; border:1px solid color-mix(in oklab, var(--text) 10%, transparent); border-radius: var(--radius); background: linear-gradient(180deg, color-mix(in oklab, var(--surface) 92%, transparent), color-mix(in oklab, var(--elev) 90%, transparent)); box-shadow: var(--shadow) }
.stat .value { font-size: var(--step-2); font-weight:800; letter-spacing:.2px }
.stat .label { margin:0; color: var(--muted) }

/* status text */
.status { display:inline-flex; align-items:center; gap:8px; color: var(--muted) }
.status .dot { width:8px; height:8px; border-radius:999px; background: color-mix(in oklab, var(--text) 30%, transparent) }
.status.ok .dot { background: var(--ok) }
.status.warn .dot { background: var(--warn) }
.status.err .dot { background: var(--err) }

/* --- Homepage: Hero --- */
.hero { position: relative; overflow: hidden; padding-top: 40px; padding-bottom: 24px }
.hero-bg { position:absolute; inset:0; pointer-events:none }
.orb { position:absolute; filter: blur(40px); opacity:.6; mix-blend: screen }
.orb-a { width:420px; height:420px; left:-80px; top:-60px; background: radial-gradient(closest-side, color-mix(in oklab, var(--primary) 45%, transparent), transparent 65%) }
.orb-b { width:520px; height:520px; right:-120px; top:-100px; background: radial-gradient(closest-side, color-mix(in oklab, var(--accent) 38%, transparent), transparent 70%) }
.gridlines { position:absolute; inset:-20%; background-image: linear-gradient(to right, color-mix(in oklab, var(--text) 6%, transparent) 1px, transparent 1px), linear-gradient(to bottom, color-mix(in oklab, var(--text) 6%, transparent) 1px, transparent 1px); background-size: 40px 40px; mask-image: radial-gradient(closest-side, #000 55%, transparent); opacity:.35; transform: perspective(800px) rotateX(50deg) translateY(-30%); animation: gridFloat 26s linear infinite }
@keyframes gridFloat { from { transform: perspective(800px) rotateX(50deg) translateY(-30%) translateX(0) } to { transform: perspective(800px) rotateX(50deg) translateY(-30%) translateX(-40px) } }
.hero-canvas { position:absolute; inset:auto 0 0 0; height: 300px; width: 100%; opacity:.7 }
.hero-content { position: relative }
.hero-cta { display:flex; align-items:center; gap:12px; flex-wrap:wrap; margin: 14px 0 8px }
.hero .scan { position:absolute; inset:0; background:
  repeating-linear-gradient(135deg,
    color-mix(in oklab, var(--ring) 8%, transparent) 0 2px,
    transparent 2px 10px);
  opacity:.18; transform: translateY(100%);
  animation: scanMove 9s linear infinite }
@keyframes scanMove { from{ transform: translateY(100%) } to{ transform: translateY(-100%) } }
.spec-badges { display:flex; gap:8px; flex-wrap:wrap; margin:8px 0 0 }
.spec { display:inline-flex; align-items:center; gap:8px; padding:6px 10px; border-radius:999px; border:1px solid color-mix(in oklab, var(--text) 14%, transparent); background: linear-gradient(90deg, color-mix(in oklab, var(--elev) 75%, transparent), color-mix(in oklab, var(--elev) 65%, transparent)); box-shadow: var(--shadow-sm); position:relative; overflow:hidden }
.spec::after { content:""; position:absolute; inset:0; background: linear-gradient(90deg, transparent, color-mix(in oklab, var(--ring) 16%, transparent), transparent); transform: translateX(-100%); animation: shimmer 3.2s ease-in-out infinite }
@keyframes shimmer { 50% { transform: translateX(100%) } 100% { transform: translateX(100%) } }
.spec svg { opacity:.8 }
.searchbar { position:relative; margin: 12px 0 10px }
.kbd-hint { position:absolute; right:10px; top:50%; transform: translateY(-50%); color: var(--muted); font-size: var(--step--1) }
.kbd { display:inline-grid; place-items:center; min-width:24px; height:24px; padding:0 6px; border:1px solid color-mix(in oklab, var(--text) 18%, transparent); border-bottom-width:2px; border-radius:8px; background: color-mix(in oklab, var(--surface) 86%, transparent); font-weight:700 }

/* --- Homepage: Tool Cards --- */
.tool-grid { counter-reset: tools }
.tool-item { position: relative }
.tool-card { position:relative; isolation:isolate; overflow:hidden; counter-increment: tools; display:block; width:100% }
.tool-card .matrix { position:absolute; inset:0; background-image: radial-gradient(circle at 1px 1px, color-mix(in oklab, var(--text) 8%, transparent) 1px, transparent 1px); background-size: 10px 10px; opacity:.18; pointer-events:none }
.tool-card .matrix::after { content: counter(tools, decimal-leading-zero); position:absolute; top:12px; left:12px; z-index:2; padding:2px 8px; border-radius:999px; background: color-mix(in oklab, var(--elev) 70%, transparent); border:1px solid color-mix(in oklab, var(--text) 12%, transparent); font-weight:800; font-size: var(--step--1); color: var(--muted) }
.tool-card::before { content:""; position:absolute; inset:0; border-radius: inherit; padding:1px; background:
  linear-gradient(180deg, color-mix(in oklab, var(--surface) 94%, transparent), color-mix(in oklab, var(--elev) 92%, transparent)) border-box,
  radial-gradient(120% 60% at var(--mx, 50%) var(--my, 0%), color-mix(in oklab, var(--ring) 18%, transparent), transparent 45%) padding-box,
  conic-gradient(from 0deg at 50% 50%, color-mix(in oklab, var(--accent) 20%, transparent), transparent 25%, color-mix(in oklab, var(--primary) 20%, transparent) 50%, transparent 75%, color-mix(in oklab, var(--accent) 20%, transparent)) border-box;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity:.65; pointer-events:none; will-change: transform; animation: holoSpin 24s linear infinite; animation-play-state: paused }
.tool-card:hover::before { animation-play-state: running }
@keyframes holoSpin { from { transform: rotate(0deg) } to { transform: rotate(360deg) } }
.tool-card::after { content:""; position:absolute; inset:-1px; border-radius: inherit; pointer-events:none; background: radial-gradient(400px 160px at var(--mx, 50%) var(--my, 0%), color-mix(in oklab, var(--ring) 22%, transparent), transparent 40%); opacity:0; transition: opacity .2s ease }
.tool-card:hover::after { opacity:1 }
.tool-head { display:flex; align-items:center; justify-content:space-between; margin-bottom:8px; transform: translateZ(20px) }
.qa { position:absolute; top:14px; right:14px; display:flex; gap:6px; opacity:0; transition: opacity .12s ease; z-index:3 }
.qa-ico { width:24px; height:24px; display:inline-grid; place-items:center; border-radius:8px; background: color-mix(in oklab, var(--elev) 70%, transparent); border:1px solid color-mix(in oklab, var(--text) 12%, transparent) }
.qa-ico:hover { border-color: color-mix(in oklab, var(--ring) 45%, transparent) }
.qa-ico { position: relative }
.qa-ico[data-tip]::after { content: attr(data-tip); position: absolute; right: 0; top: 120%; transform: translateX(10%); white-space: nowrap; background: color-mix(in oklab, var(--surface) 90%, transparent); color: var(--text); border:1px solid color-mix(in oklab, var(--text) 12%, transparent); border-radius:8px; padding:4px 8px; font-size: var(--step--1); opacity:0; pointer-events:none; transition: opacity .12s ease; box-shadow: var(--shadow-sm) }
.qa-ico[data-tip]:hover::after, .qa-ico[data-tip]:focus-visible::after { opacity: 1 }
.tool-item:hover .qa, .qa:focus-within { opacity:1 }
.icon { width:36px; height:36px; border-radius:12px; display:grid; place-items:center; color:white; background: linear-gradient(160deg, var(--primary), var(--accent)); box-shadow: 0 10px 20px rgba(79,140,255,.28) }
.tool-title { margin:0 0 4px 0; letter-spacing:.2px }
.tool-desc { margin:0; color: var(--muted) }
.tool-tags { margin-top:12px; display:flex; gap:6px; flex-wrap:wrap }
.tag { display:inline-block; padding:6px 10px; border-radius:999px; background: color-mix(in oklab, var(--elev) 72%, transparent); color: var(--muted); font-size: var(--step--1) }

/* feature cards reuse card styles */
.feature { position:relative; min-height: 160px; background: color-mix(in oklab, var(--surface) 96%, transparent); border-style: dashed; border-color: color-mix(in oklab, var(--text) 18%, transparent); box-shadow: none; overflow: hidden }
.feature::before { content:""; position:absolute; left:0; top:0; bottom:0; width:4px; background: linear-gradient(180deg, var(--accent), var(--primary)); opacity:.6 }
.feature::after { content:""; position:absolute; inset:0; background-image: radial-gradient(circle at 1px 1px, color-mix(in oklab, var(--text) 8%, transparent) 1px, transparent 1px); background-size: 18px 18px; opacity:.14; pointer-events:none }
.feature .icon { background: none; box-shadow: none; color: var(--ring); border:1px solid color-mix(in oklab, var(--ring) 55%, transparent) }
.feature .tool-title { font-weight: 800; letter-spacing: .3px }
.feature .tool-desc { color: color-mix(in oklab, var(--muted) 90%, transparent) }
.feature .tool-head { gap: 10px }
.kicker { display:inline-flex; align-items:center; gap:6px; padding:4px 8px; border-radius:999px; background: color-mix(in oklab, var(--elev) 75%, transparent); color: var(--muted); font-weight:700; font-size: var(--step--1); border:1px solid color-mix(in oklab, var(--text) 12%, transparent) }

/* hover parallax cursor pos for glow */
.tool-card { --mx: 50%; --my: 0%; --rx: 0deg; --ry: 0deg; transform-style: preserve-3d }
.tool-card:hover { transform: translateY(-2px) rotateX(var(--rx)) rotateY(var(--ry)) }
.tool-item:hover .tool-card { transform: translateY(-2px) rotateX(var(--rx)) rotateY(var(--ry)) }
.tool-item:hover .tool-card::after { opacity: 1 }

/* results state (optional) */
body[data-results="0"] #tools .grid::after { content: '一致するツールが見つかりませんでした'; display:block; grid-column: 1 / -1; text-align:center; color: var(--muted); padding: 20px 0 }

/* blueprint section frame */
.blueprint { position: relative }
.blueprint::before { content:""; position:absolute; inset: -6px; border-radius: 18px; background:
  linear-gradient(transparent, transparent) padding-box,
  repeating-linear-gradient(90deg, color-mix(in oklab, var(--text) 10%, transparent) 0 2px, transparent 2px 12px) border-box,
  repeating-linear-gradient(0deg, color-mix(in oklab, var(--text) 10%, transparent) 0 2px, transparent 2px 12px) border-box;
  border: 1px solid transparent; opacity:.28; pointer-events:none }
.blueprint::after { content:""; position:absolute; inset:0; pointer-events:none; background:
  radial-gradient(6px 6px at 12px 12px, color-mix(in oklab, var(--text) 16%, transparent), transparent 60%),
  radial-gradient(6px 6px at calc(100% - 12px) 12px, color-mix(in oklab, var(--text) 16%, transparent), transparent 60%),
  radial-gradient(6px 6px at 12px calc(100% - 12px), color-mix(in oklab, var(--text) 16%, transparent), transparent 60%),
  radial-gradient(6px 6px at calc(100% - 12px) calc(100% - 12px), color-mix(in oklab, var(--text) 16%, transparent), transparent 60%);
  opacity:.25 }

/* right-side dock nav */
.docknav { position: fixed; right: 14px; top: 50%; transform: translateY(-50%); display: grid; gap:10px; z-index: 70 }
.dock { position:relative; display:inline-grid; place-items:center; width:44px; height:44px; border-radius:999px; background: color-mix(in oklab, var(--elev) 70%, transparent); color: var(--muted); text-decoration:none; border:1px solid color-mix(in oklab, var(--text) 12%, transparent) }
.dock::after { content:""; position:absolute; inset:-3px; border-radius:999px; background:
  conic-gradient(var(--ring) calc(var(--pct, 0) * 1%), transparent 0);
  -webkit-mask: radial-gradient(farthest-side, transparent calc(50% - 3px), #000 0);
          mask: radial-gradient(farthest-side, transparent calc(50% - 3px), #000 0);
  opacity:.6; pointer-events:none }
.dock:hover { color: var(--text); border-color: color-mix(in oklab, var(--ring) 45%, transparent) }
.dock.active { color: var(--text); border-color: color-mix(in oklab, var(--ring) 55%, transparent); box-shadow: 0 0 0 3px color-mix(in oklab, var(--ring) 25%, transparent) }

/* focus-visible rings */
.btn:focus-visible, .chip:focus-visible, .dock:focus-visible, .qa-ico:focus-visible, .nav a:focus-visible, .card:focus-visible, .input:focus-visible, .select:focus-visible, .textarea:focus-visible {
  outline: none; box-shadow: 0 0 0 2px color-mix(in oklab, var(--bg) 100%, transparent), 0 0 0 4px color-mix(in oklab, var(--ring) 40%, transparent);
}

/* bento-style layout for features */
@container (min-width: 980px) {
  .feature:nth-child(1) { grid-column: span 8 }
  .feature:nth-child(2) { grid-column: span 4 }
  .feature:nth-child(3) { grid-column: span 4 }
  .feature:nth-child(4) { grid-column: span 8 }
  .feature:nth-child(5) { grid-column: span 6 }
  .feature:nth-child(6) { grid-column: span 6 }
}

/* reduced motion */
@media (prefers-reduced-motion: reduce){
  .gridlines { animation: none }
  .hero .scan { animation: none }
  .tool-card:hover { transform: translateY(-2px) }
  .tool-card::after { transition: none }
  .scroll-progress { transition: none }
}