:root {
  --bg: #f2f4f8;
  --grid: #d9dee7;
  --surface: #ffffff;
  --surface-2: #f0f2f6;
  --surface-3: #e5e8ee;
  --text: #151a24;
  --text-2: #3d4657;
  --text-3: #5a6374;
  --line: #d8dce4;
  --line-strong: #bcc3cf;
  --accent: #2357c6;
  --accent-ink: #1b47a6;
  --accent-soft: #e6eefc;
  --lit: #8f5300;
  --lit-bg: #fff4dc;
  --lit-bg-2: #ffe6b0;
  --lit-border: #e0a03a;
  --lit-glow: rgba(224, 160, 58, .32);
  --lit-icon: #a5650a;
  --lit-icon-fg: #ffffff;
  --locked-bg: #eef0f4;
  --locked-text: #555e6f;
  --mini-locked: #cdd3dd;
  --req: #2357c6;
  --rec: #7a4fd0;
  --out: #148061;
  --edge: #9ea7b7;
  --danger: #b3302a;
  --shadow-sm: 0 1px 2px rgba(20, 30, 50, .06);
  --shadow: 0 1px 2px rgba(20, 30, 50, .06), 0 4px 14px rgba(20, 30, 50, .07);
  --shadow-lg: 0 2px 4px rgba(20, 30, 50, .08), 0 12px 30px rgba(20, 30, 50, .12);
  --radius: 12px;
  --font: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1218; --grid: #232934; --surface: #181d26; --surface-2: #212833; --surface-3: #2a3240;
    --text: #e9ecf2; --text-2: #bcc4d2; --text-3: #9ba4b5; --line: #2e3542; --line-strong: #434c5c;
    --accent: #7aa7f7; --accent-ink: #a9c6fb; --accent-soft: #1d2b44;
    --lit: #f5c46a; --lit-bg: #33270f; --lit-bg-2: #45330f; --lit-border: #c98a22; --lit-glow: rgba(201, 138, 34, .35);
    --lit-icon: #e3a843; --lit-icon-fg: #1a1205;
    --locked-bg: #1d222b; --locked-text: #9aa2b2; --mini-locked: #3a4250;
    --req: #7aa7f7; --rec: #b597f2; --out: #4fcb9e; --edge: #525c6e; --danger: #f2796f;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow: 0 1px 2px rgba(0, 0, 0, .45), 0 4px 14px rgba(0, 0, 0, .35);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, .5), 0 12px 30px rgba(0, 0, 0, .45);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1218; --grid: #232934; --surface: #181d26; --surface-2: #212833; --surface-3: #2a3240;
  --text: #e9ecf2; --text-2: #bcc4d2; --text-3: #9ba4b5; --line: #2e3542; --line-strong: #434c5c;
  --accent: #7aa7f7; --accent-ink: #a9c6fb; --accent-soft: #1d2b44;
  --lit: #f5c46a; --lit-bg: #33270f; --lit-bg-2: #45330f; --lit-border: #c98a22; --lit-glow: rgba(201, 138, 34, .35);
  --lit-icon: #e3a843; --lit-icon-fg: #1a1205;
  --locked-bg: #1d222b; --locked-text: #9aa2b2; --mini-locked: #3a4250;
  --req: #7aa7f7; --rec: #b597f2; --out: #4fcb9e; --edge: #525c6e; --danger: #f2796f;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 1px 2px rgba(0, 0, 0, .45), 0 4px 14px rgba(0, 0, 0, .35);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, .5), 0 12px 30px rgba(0, 0, 0, .45);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.55 var(--font);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { margin: 0; font-weight: 650; }
button, input, select { font: inherit; color: inherit; }
a { color: var(--accent); }
.skip-link {
  position: fixed; left: 12px; top: -60px; z-index: 100; padding: 8px 14px; border-radius: 9px; border: 0;
  background: var(--accent); color: #fff; font-weight: 600; cursor: pointer; transition: top .15s;
}
.skip-link:focus { top: 10px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }

/* ── top bar ── */
.topbar {
  display: flex; align-items: center; gap: 14px; padding: 10px 18px;
  background: var(--surface); border-bottom: 1px solid var(--line); z-index: 20; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; border-radius: 8px; }
.logo { width: 32px; height: 32px; flex: none; }
.logo-l { fill: none; stroke: var(--line-strong); stroke-width: 2.2; stroke-linecap: round; }
.logo-n1 { fill: var(--lit-border); }
.logo-n2 { fill: var(--accent); }
.logo-n3 { fill: #1f9d74; }
.brand h1 { font-size: 16.5px; line-height: 1.25; letter-spacing: .01em; }
.brand .sub { display: block; font-size: 12px; color: var(--text-3); }
.seg { display: inline-flex; padding: 3px; gap: 2px; background: var(--surface-2); border-radius: 10px; border: 1px solid var(--line); }
.seg button {
  border: 0; background: none; padding: 5px 14px; min-height: 30px; border-radius: 7px; cursor: pointer;
  font-weight: 600; font-size: 13.5px; color: var(--text-2);
}
.seg button:hover { color: var(--text); }
.seg button[aria-pressed="true"] { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm), 0 0 0 1px var(--line); }
.progress { min-width: 190px; }
.progress-text { font-size: 12.5px; color: var(--text-2); }
.progress-text strong { color: var(--text); }
.bar { height: 6px; border-radius: 3px; background: var(--surface-3); overflow: hidden; margin-top: 4px; }
.bar-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--lit-border), #f0c060); transition: width .3s; }
.search { position: relative; flex: 1 1 220px; max-width: 340px; }
.search input {
  width: 100%; padding: 7px 34px 7px 12px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface-2);
}
.search input:focus { background: var(--surface); }
.hint-key {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%);
  font: 11px/1 var(--font); color: var(--text-3); border: 1px solid var(--line); border-radius: 4px; padding: 2px 5px; background: var(--surface);
}
.search-results {
  position: absolute; top: calc(100% + 4px); left: 0; right: 0; margin: 0; padding: 4px; list-style: none;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow-lg); z-index: 40;
  max-height: 60vh; overflow: auto;
}
.search-results li { padding: 7px 10px; border-radius: 7px; cursor: pointer; display: flex; gap: 8px; align-items: baseline; }
.search-results li[aria-selected="true"], .search-results li:hover { background: var(--accent-soft); }
.search-results .r-en { color: var(--text-3); font-size: 12px; }
.search-results .r-state { margin-left: auto; font-size: 12px; color: var(--text-3); white-space: nowrap; }
.actions { display: flex; gap: 8px; align-items: center; margin-left: auto; }
.actions select { padding: 6px 8px; min-height: 32px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); max-width: 200px; }
.btn {
  padding: 6px 12px; min-height: 32px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); cursor: pointer;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
:root[data-theme="dark"] .btn.primary { color: #0b1220; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn.primary { color: #0b1220; } }
.btn.primary:hover { filter: brightness(1.08); }
.btn.small { padding: 4px 10px; min-height: 28px; font-size: 13px; }
.btn:disabled { opacity: .55; cursor: not-allowed; filter: none; }
.icon-btn {
  width: 32px; height: 32px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface);
  cursor: pointer; display: inline-grid; place-items: center; font-size: 16px; line-height: 1;
}
.icon-btn:hover { background: var(--surface-2); }
.icon-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.link-btn { background: none; border: 0; color: var(--accent); cursor: pointer; padding: 4px 0; min-height: 24px; font-size: 13px; }
.menu { position: relative; }
.menu-pop {
  position: absolute; right: 0; top: calc(100% + 4px); background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; box-shadow: var(--shadow-lg); padding: 4px; display: flex; flex-direction: column; min-width: 160px; z-index: 40;
}
.menu-pop button, .menu-pop .as-btn {
  text-align: left; background: none; border: 0; padding: 8px 10px; border-radius: 7px; cursor: pointer; font-size: 13.5px;
}
.menu-pop button:hover, .menu-pop .as-btn:hover { background: var(--surface-2); }
.menu-pop .danger { color: var(--danger); }
.only-narrow { display: none; }

/* ── layout ── */
.layout { flex: 1; display: flex; min-height: 0; position: relative; }
.side {
  width: 300px; flex: none; overflow-y: auto; background: var(--surface); border-right: 1px solid var(--line);
  padding: 16px 14px 22px; display: flex; flex-direction: column; gap: 20px;
}
.side h2 { font-size: 14px; }
.sec-head { display: flex; justify-content: space-between; align-items: baseline; }
.sec-note { margin: 2px 0 8px; font-size: 12px; color: var(--text-3); }
.count { color: var(--text-3); font-weight: 500; }
.intro { background: var(--accent-soft); border-radius: var(--radius); padding: 13px 15px; }
.intro ol { margin: 8px 0 10px; padding-left: 18px; font-size: 13px; color: var(--text-2); }
.intro li + li { margin-top: 4px; }
.item-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.item-list li > button {
  width: 100%; text-align: left; display: grid; grid-template-columns: 20px 1fr auto; gap: 9px; align-items: center;
  padding: 7px 8px; border: 0; border-radius: 9px; background: none; cursor: pointer;
}
.item-list li > button:hover { background: var(--surface-2); }
.item-list .it-name { display: block; font-size: 13.5px; font-weight: 550; }
.item-list .it-sub { display: block; font-size: 11.5px; color: var(--text-3); }
.item-list .it-meta { font-size: 11.5px; color: var(--text-3); white-space: nowrap; }
.item-list .it-no { font-size: 12px; color: var(--text-3); text-align: center; }
.item-list li.done .it-name { color: var(--text-3); text-decoration: line-through; }
.st-ico { width: 20px; height: 20px; display: inline-grid; place-items: center; border-radius: 6px; }
.st-ico svg { width: 13px; height: 13px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.st-ico.lit { background: var(--lit-icon); color: var(--lit-icon-fg); }
.st-ico.avail { background: var(--accent-soft); color: var(--accent); }
.st-ico.locked { background: var(--locked-bg); color: var(--locked-text); }
.legend ul { list-style: none; margin: 8px 0 0; padding: 0; font-size: 12.5px; color: var(--text-2); display: flex; flex-direction: column; gap: 8px; }
.legend li { display: flex; gap: 9px; align-items: center; }
.lg-card {
  width: 26px; height: 18px; border-radius: 5px; flex: none; display: inline-grid; place-items: center; border: 1.5px solid var(--line);
}
.lg-card svg { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.lg-card.lit { background: var(--lit-bg); border-color: var(--lit-border); color: var(--lit); }
.lg-card.avail { background: var(--surface); border-color: var(--accent); color: var(--accent); }
.lg-card.locked { background: var(--locked-bg); color: var(--locked-text); }
.lg-card.opt { border-style: dashed; background: var(--surface); }
.lg-line { width: 26px; height: 0; flex: none; border-top: 2px solid var(--req); }
.lg-line.rec { border-top: 2px dashed var(--rec); }
.lg-ext { width: 26px; flex: none; display: inline-flex; gap: 3px; justify-content: center; }
.lg-ext i { width: 7px; height: 7px; border-radius: 50%; }

/* ── overview ── */
.ov-wrap {
  flex: 1; min-width: 0; display: flex; flex-direction: column;
  background-color: var(--bg);
  background-image: radial-gradient(var(--grid) 1px, transparent 1.2px);
  background-size: 22px 22px;
}
.ov-head { display: flex; gap: 24px; align-items: flex-end; justify-content: space-between; padding: 18px 26px 6px; }
.ov-title { font-size: 21px; letter-spacing: .01em; }
.ov-sub { margin: 4px 0 0; color: var(--text-2); max-width: 780px; font-size: 13.5px; }
.ov-legend { list-style: none; margin: 0; padding: 0; display: flex; gap: 14px; font-size: 12.5px; color: var(--text-2); flex-wrap: wrap; flex: none; }
.ov-legend li { display: flex; align-items: center; gap: 6px; }
.mini-key { width: 16px; height: 8px; border-radius: 2px; background: var(--mini-locked); }
.mini-key.lit { background: var(--lit-border); }
.mini-key.avail { background: var(--accent); }
.road-key { width: 26px; height: 5px; border-radius: 3px; background: linear-gradient(90deg, #2f7fd1, #1f9d74); opacity: .7; }
.ov-axis {
  display: flex; align-items: center; gap: 10px; margin: 6px 26px 0; font-size: 12px; font-weight: 600; color: var(--text-2);
}
.ov-axis i { flex: 1; height: 0; border-top: 1.5px dashed var(--line-strong); position: relative; }
.ov-axis i::after {
  content: ""; position: absolute; right: -2px; top: -5px; border: 4.5px solid transparent; border-left-color: var(--line-strong);
}
.ov-scroll { flex: 1; min-height: 0; position: relative; overflow: hidden; cursor: grab; touch-action: none; }
.ov-scroll:active { cursor: grabbing; }
.ov-stage { position: absolute; left: 0; top: 0; }
.ov-roads { position: absolute; left: 0; top: 0; overflow: visible; }
.ov-road { fill: none; opacity: 0; stroke-linecap: round; transition: opacity .18s; }
.ov-road.major { opacity: .28; }
.ov-road.on { opacity: .85; }
.ov-road.on.back { stroke-dasharray: 5 5; }
.ov-road.dim { opacity: 0; }
.ov-labels circle { fill: var(--surface); stroke: var(--line-strong); stroke-width: 1.2; }
.ov-labels text { font: 700 11px var(--font); fill: var(--text); }
/* fixed two-line height: the hover text must not resize the map area above it */
.ov-caption {
  margin: 0; padding: 8px 26px 14px; height: calc(13px * 1.55 * 2 + 22px); overflow: hidden; flex: none;
  font-size: 13px; line-height: 1.55; color: var(--text-2);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
}

.region {
  position: absolute; display: flex; flex-direction: column; background: var(--surface);
  border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); overflow: hidden;
  transition: transform .16s, box-shadow .16s, opacity .2s, border-color .16s;
}
.region::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px; background: var(--dc); }
.region.focus { transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--dc) 55%, var(--line)); }
/* De-emphasis keeps text readable (WCAG 1.4.3): drop colour, shadow and the mini map, never the text contrast. */
.region.dim, .region.off-plan:not(.focus) { filter: grayscale(1); box-shadow: none; background: var(--surface-2); }
.region.dim .rg-mini-wrap, .region.off-plan:not(.focus) .rg-mini-wrap,
.region.dim::before, .region.off-plan:not(.focus)::before { opacity: .3; }
.region.opt { border-style: dashed; }
.region.done { border-color: var(--lit-border); box-shadow: var(--shadow), 0 0 0 3px var(--lit-glow); }
.region.in-plan { box-shadow: var(--shadow), 0 0 0 3px var(--accent-soft), 0 0 0 4.5px var(--accent); }
.rg-main {
  height: 66px; flex: none; display: grid; grid-template-columns: 10px 1fr; gap: 10px; align-items: start;
  padding: 13px 14px 4px; border: 0; background: none; cursor: pointer; text-align: left; border-radius: 16px 16px 0 0;
}
.rg-main::after { content: ""; position: absolute; inset: 0; border-radius: 16px; } /* whole tile is the target */
.rg-main:focus-visible { outline: none; }
.rg-main:focus-visible::after { outline: 3px solid var(--accent); outline-offset: -3px; }
.rg-swatch { width: 10px; height: 30px; border-radius: 3px; background: var(--dc); margin-top: 2px; }
.rg-titles { min-width: 0; }
.rg-name {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  font-size: 15px; font-weight: 650; line-height: 1.3;
}
.rg-en { display: block; font-size: 12px; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rg-mini-wrap { padding: 6px 14px; flex: none; }
.rg-mini { display: block; overflow: visible; }
.rg-mini .mini-edge { stroke: var(--line-strong); stroke-width: .8; }
.rg-mini rect { fill: var(--mini-locked); }
.rg-mini rect.mini-lit { fill: var(--lit-border); }
.rg-mini rect.mini-avail { fill: var(--accent); }
.rg-mini rect.plan { stroke: var(--accent); stroke-width: 1.4; }
.rg-foot { margin-top: auto; padding: 0 14px 12px; display: flex; flex-direction: column; gap: 7px; }
.rg-prog { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--text-2); }
.rg-badge { display: inline-flex; align-items: center; gap: 4px; font-weight: 650; white-space: nowrap; }
.rg-badge svg { width: 13px; height: 13px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.region.open .rg-badge { color: var(--accent); }
.region.done .rg-badge { color: var(--lit); }
.region.locked .rg-badge { color: var(--locked-text); }
.rg-bar { flex: 1; height: 5px; border-radius: 3px; background: var(--surface-3); overflow: hidden; }
.rg-bar-fill { display: block; height: 100%; width: 0; background: var(--lit-border); transition: width .3s; }
.rg-prog-text { white-space: nowrap; }
.rg-next { min-height: 28px; display: flex; align-items: center; }
.rg-next-btn {
  position: relative; z-index: 1; width: 100%; min-height: 28px; display: flex; align-items: center; gap: 8px;
  padding: 3px 10px; border: 1px solid transparent; border-radius: 8px; background: var(--accent-soft); color: var(--accent-ink);
  cursor: pointer; text-align: left; font-size: 13px;
}
.rg-next-btn:hover { border-color: var(--accent); }
.rg-next-k { font-size: 11.5px; font-weight: 700; }
.rg-next-name { flex: 1; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rg-note { font-size: 13px; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* phones: tiles become a list in column order; the road hints live in each tile's text */
.ov-stage.list { position: static; transform: none !important; width: auto !important; height: auto !important; display: flex; flex-direction: column; gap: 12px; }
.ov-stage.list .ov-roads { display: none; }
.ov-stage.list .region { position: relative; left: auto !important; top: auto !important; width: auto !important; height: auto !important; }
.ov-stage.list .rg-mini { width: 100%; height: auto; }

/* ── map ── */
.map-wrap {
  flex: 1; position: relative; overflow: hidden; touch-action: none; cursor: grab;
  background-color: var(--bg);
  background-image: radial-gradient(var(--grid) 1px, transparent 1.2px);
  background-size: 22px 22px;
}
.map-wrap:active { cursor: grabbing; }
.map { position: absolute; left: 0; top: 0; }
.edges { position: absolute; left: 0; top: 0; overflow: visible; pointer-events: none; }
.edges path { fill: none; }
.e-base { stroke: var(--edge); stroke-width: 1.5; opacity: .6; }
.e-base.lit { stroke: var(--lit-border); stroke-width: 2.2; opacity: .9; }
.e-base.dim { opacity: .1; }
.e-req { stroke: var(--req); stroke-width: 2.4; }
.e-rec { stroke: var(--rec); stroke-width: 2; stroke-dasharray: 6 5; }
.e-out { stroke: var(--out); stroke-width: 2; }
.arr-req { fill: var(--req); }
.arr-rec { fill: var(--rec); }
.arr-out { fill: var(--out); }

.col-label {
  position: absolute; top: 4px; height: 32px; display: flex; align-items: center; gap: 6px; padding: 0 10px;
  font-size: 12.5px; color: var(--text-2); font-weight: 650; white-space: nowrap;
  background: var(--surface); border: 1px solid var(--line); border-radius: 999px; box-shadow: var(--shadow-sm);
}
.col-label .start { color: var(--accent); font-weight: 600; }
.col-guide { position: absolute; top: 40px; width: 0; border-left: 1px dashed var(--line-strong); opacity: .55; }

.lane { position: absolute; left: -16px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.lane.flash { animation: lane-flash 1.6s ease-out; }
@keyframes lane-flash {
  0%, 30% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--dc) 55%, transparent), var(--shadow-lg); }
  100% { box-shadow: var(--shadow-sm); }
}
.lane-head {
  position: absolute; left: 0; top: 0; right: 0; height: 40px; display: flex; align-items: center; gap: 10px;
  padding: 0 14px; border: 0; cursor: pointer; text-align: left; width: 100%; border-radius: 15px 15px 0 0;
  background: color-mix(in srgb, var(--dc) 8%, var(--surface));
  border-bottom: 1px solid color-mix(in srgb, var(--dc) 18%, var(--line));
}
.lane.collapsed .lane-head { border-radius: 15px; border-bottom: 0; }
.lane-head .swatch { width: 10px; height: 22px; border-radius: 3px; background: var(--dc); flex: none; }
.lane-head .lane-name { font-size: 15px; font-weight: 650; }
.lane-head .lane-en { font-size: 12px; color: var(--text-3); }
.lane-head .lane-prog { font-size: 12px; color: var(--text-2); margin-left: 6px; }
.lane-head .chev { margin-left: 4px; color: var(--text-3); transition: transform .2s; }
.lane.collapsed .chev { transform: rotate(-90deg); }
.lane-tag { font-size: 11px; padding: 1px 6px; border-radius: 4px; border: 1px dashed var(--text-3); color: var(--text-3); }

.card {
  position: absolute; display: flex; align-items: center; gap: 8px; padding: 6px 9px 6px 13px;
  border-radius: 10px; border: 1px solid var(--line); background: var(--surface); cursor: pointer; text-align: left;
  box-shadow: inset 4px 0 0 var(--dc), var(--shadow-sm); transition: opacity .15s, box-shadow .15s, transform .15s;
}
.card .c-ico { width: 20px; height: 20px; flex: none; display: grid; place-items: center; border-radius: 6px; }
.card .c-ico svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.card .c-text { min-width: 0; flex: 1; }
.card .c-name {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  font-size: 14px; line-height: 1.3; font-weight: 600;
}
.card .c-en { display: block; font-size: 11px; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card .c-lv {
  font-size: 10.5px; font-weight: 600; color: var(--text-3); align-self: flex-start; padding: 0 5px; border-radius: 999px;
  background: var(--surface-2); line-height: 16px;
}
.card .c-ext {
  position: absolute; left: 12px; top: -6px; display: flex; gap: 3px;
  padding: 2px 4px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line-strong);
}
.card .c-ext i { width: 6px; height: 6px; border-radius: 50%; display: block; }
.card.avail { border-color: var(--accent); box-shadow: inset 4px 0 0 var(--dc), 0 0 0 3px var(--accent-soft), var(--shadow-sm); }
.card.avail .c-ico { background: var(--accent-soft); color: var(--accent); }
.card.avail:hover { transform: translateY(-1px); box-shadow: inset 4px 0 0 var(--dc), 0 0 0 3px var(--accent-soft), var(--shadow); }
.card.lit {
  background: linear-gradient(135deg, var(--lit-bg), var(--lit-bg-2)); border-color: var(--lit-border);
  box-shadow: inset 4px 0 0 var(--dc), 0 0 0 3px var(--lit-glow);
}
.card.lit .c-ico { background: var(--lit-icon); color: var(--lit-icon-fg); }
.card.lit .c-lv { background: rgba(255, 255, 255, .55); }
.card.locked { background: var(--locked-bg); border-color: transparent; box-shadow: inset 4px 0 0 color-mix(in srgb, var(--dc) 45%, var(--locked-bg)); }
.card.locked .c-name { color: var(--locked-text); font-weight: 550; }
.card.locked .c-ico { color: var(--locked-text); }
.card.locked:hover { border-color: var(--line-strong); }
.card.opt { border-style: dashed; border-color: var(--line-strong); }
.card.sel { outline: 3px solid var(--accent); outline-offset: 2px; z-index: 3; }
/* context cards while a skill is selected: no colour, border or shadow, but text stays ≥ 4.5:1 */
.card.dim { filter: grayscale(1); background: var(--surface); border-color: transparent; box-shadow: none; }
.card.dim .c-name { color: var(--text-3); font-weight: 500; }
.card.dim .c-ico, .card.dim .c-ext { opacity: .5; }
.card.dim:hover { border-color: var(--line-strong); }
.card .plan-no {
  position: absolute; top: -9px; right: -9px; min-width: 20px; height: 20px; border-radius: 10px; padding: 0 5px;
  background: var(--accent); color: #fff; font-size: 11px; font-weight: 700; display: grid; place-items: center;
  box-shadow: 0 0 0 2px var(--surface);
}
.card.match { box-shadow: inset 4px 0 0 var(--dc), 0 0 0 4px var(--accent); }

.zoom-ctl { position: absolute; right: 14px; bottom: 14px; display: flex; flex-direction: column; gap: 6px; }
.zoom-ctl .icon-btn { box-shadow: var(--shadow); }

/* ── detail panel ── */
.panel {
  width: 420px; flex: none; background: var(--surface); border-left: 1px solid var(--line); overflow-y: auto;
  position: relative;
}
.panel-inner { padding: 18px 20px 30px; display: flex; flex-direction: column; gap: 18px; }
.p-close { position: absolute; top: 12px; right: 12px; }
.p-crumb { font-size: 12px; color: var(--text-3); padding-right: 40px; }
.p-title { font-size: 21px; line-height: 1.3; }
.p-en { color: var(--text-3); font-size: 13px; margin-top: 2px; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.p-scope { color: var(--text-3); font-size: 13px; margin: 8px 0 0; }
.chip { font-size: 11.5px; padding: 2px 9px; border-radius: 999px; background: var(--surface-2); color: var(--text-2); }
.chip.warn { background: #fff3cd; color: #6e5000; }
:root[data-theme="dark"] .chip.warn { background: #3d3214; color: #f0cf74; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .chip.warn { background: #3d3214; color: #f0cf74; } }
.chip.ok { background: #dff3ea; color: #12613f; }
:root[data-theme="dark"] .chip.ok { background: #16372a; color: #7fd9b4; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .chip.ok { background: #16372a; color: #7fd9b4; } }
.status-box { border-radius: var(--radius); padding: 13px 15px; display: flex; flex-direction: column; gap: 9px; }
.status-box.lit { background: linear-gradient(135deg, var(--lit-bg), var(--lit-bg-2)); }
.status-box.avail { background: var(--accent-soft); }
.status-box.locked { background: var(--locked-bg); }
.status-line { font-weight: 650; display: flex; gap: 8px; align-items: center; }
.status-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.confirm { font-size: 13px; color: var(--text-2); }
.p-sec h3 { font-size: 13.5px; color: var(--text-2); margin-bottom: 7px; display: flex; gap: 6px; align-items: baseline; }
.p-sec h3 .h-note { font-weight: 400; font-size: 12px; color: var(--text-3); }
.p-sec p { margin: 0; }
.pr-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 5px; }
.pr-list li > button {
  width: 100%; text-align: left; display: grid; grid-template-columns: 20px 1fr; gap: 9px; align-items: start;
  padding: 7px 9px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); cursor: pointer;
}
.pr-list li > button:hover { border-color: var(--accent); background: var(--surface-2); }
.pr-list .pr-name { font-size: 13.5px; font-weight: 600; }
.pr-list .pr-en { font-size: 11.5px; color: var(--text-3); margin-left: 4px; font-weight: 400; }
.pr-list .pr-why { display: block; font-size: 12px; color: var(--text-3); margin-top: 1px; }
.pr-empty { font-size: 13px; color: var(--text-3); }
.milestones { margin: 6px 0 0; padding-left: 18px; font-size: 13px; color: var(--text-2); }
.res-list { display: grid; gap: 9px; }
.learning-paths { display: grid; gap: 9px; margin-bottom: 10px; }
.route-summary { font-size: 13px; color: var(--text-2); }
.learning-route, .coverage-details { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.learning-route > summary, .coverage-details > summary { cursor: pointer; color: var(--accent); min-height: 24px; font-size: 13px; }
.learning-route ol { margin: 9px 0 0; padding-left: 21px; }
.learning-route li { margin-bottom: 10px; font-size: 13px; overflow-wrap: anywhere; }
.learning-route li p { margin-top: 4px; }
.learning-route a, .coverage-table a { overflow-wrap: anywhere; }
.route-cost { display: inline-block; margin-left: 6px; font-size: 11.5px; color: var(--text-2); }
.route-access { display: block; color: var(--text-2); font-size: 12px; font-weight: normal; }
.route-gap { font-size: 12.5px; color: var(--text-2); }
.coverage-table { width: 100%; table-layout: fixed; border-collapse: collapse; margin-top: 9px; font-size: 12px; }
.coverage-table th, .coverage-table td { padding: 7px 5px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; overflow-wrap: anywhere; }
.coverage-table th:first-child { width: 24%; }
.coverage-table td div + div { margin-top: 5px; }

.res-heading { margin: 0; font-size: 13px; color: var(--text); }
.res {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 11px 13px; display: flex; flex-direction: column; gap: 4px;
  background: linear-gradient(180deg, var(--surface-2), var(--surface) 70%);
}
.res .res-tier { font-size: 11.5px; color: var(--text-3); }
.res a { font-weight: 600; text-decoration: none; }
.res a:hover { text-decoration: underline; }
.res .res-covers, .res .res-access { font-size: 12.5px; color: var(--text-2); }
.res a { overflow-wrap: anywhere; }
.res-details { font-size: 12.5px; }
.res-details summary { cursor: pointer; color: var(--accent); min-height: 24px; }
.res-details[open] .res-covers { margin-top: 6px; }
.ex { border: 1px solid var(--line); border-radius: var(--radius); padding: 13px 15px; font-size: 13.5px; }
.ex .ex-meta { font-size: 12px; color: var(--text-3); margin-bottom: 6px; }
.ex pre { background: var(--surface-2); padding: 8px 10px; border-radius: 6px; overflow-x: auto; font-size: 12.5px; }
.ex code { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }
.ex details { margin-top: 10px; }
.ex summary { cursor: pointer; color: var(--accent); font-size: 13px; min-height: 24px; }
.ex .ex-answer { margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--line); }
.pending { font-size: 13px; color: var(--text-3); font-style: italic; }
.courses { font-size: 12.5px; color: var(--text-2); }
.courses summary { cursor: pointer; color: var(--accent); min-height: 24px; }
.courses ul { padding-left: 18px; margin: 6px 0 0; }
.courses q { color: var(--text); }

/* ── toast & dialog ── */
.toast {
  position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); background: var(--text); color: var(--bg);
  padding: 10px 16px; border-radius: 12px; box-shadow: var(--shadow-lg); display: flex; gap: 14px; align-items: center;
  z-index: 60; max-width: min(92vw, 640px); font-size: 13.5px;
}
.toast .link-btn { color: var(--lit-border); font-weight: 600; white-space: nowrap; }
dialog {
  border: 1px solid var(--line); border-radius: 16px; background: var(--surface); color: var(--text);
  max-width: 580px; padding: 22px 26px; box-shadow: var(--shadow-lg);
}
dialog::backdrop { background: rgba(10, 15, 25, .45); }
dialog ul { padding-left: 18px; color: var(--text-2); font-size: 13.5px; }
dialog li + li { margin-top: 6px; }

/* ── knowledge map (guide.js) ── */
.guide-src { font-size: 12.5px; color: var(--text-2); }
.guide-preview {
  margin: 7px 0 9px; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 5px;
  counter-reset: gp;
}
.guide-preview li {
  font-size: 12px; padding: 2px 8px; border-radius: 6px; background: var(--surface-2); color: var(--text-2);
  border: 1px solid var(--line); counter-increment: gp;
}
.guide-preview li::before { content: counter(gp) " "; color: var(--text-3); font-variant-numeric: tabular-nums; }
.guide-preview li.more { background: none; border-style: dashed; color: var(--text-3); }
.guide-preview li.more::before { content: none; }
dialog.guide {
  max-width: none; width: min(1400px, 96vw); height: min(900px, 92vh); padding: 0; overflow: hidden;
  display: none; flex-direction: column;
}
dialog.guide[open] { display: flex; }
.g-head .seg button { padding: 4px 11px; min-height: 28px; font-size: 13px; }
.g-head {
  display: flex; gap: 14px; align-items: center; flex-wrap: wrap; padding: 12px 16px 12px 20px;
  border-bottom: 1px solid var(--line); background: var(--surface);
}
.g-titles { flex: 1 1 260px; min-width: 0; }
.g-titles h2 { font-size: 17px; line-height: 1.3; }
.g-en { font-size: 12.5px; color: var(--text-3); }
.g-body { flex: 1; min-height: 0; display: grid; grid-template-columns: minmax(0, 1fr) 330px; }
.g-stage { position: relative; min-height: 0; background: var(--bg); }
.g-svg { width: 100%; height: 100%; display: block; cursor: grab; }
.g-svg:active { cursor: grabbing; }
.g-svg.markmap {
  --markmap-font: 400 13.5px/1.4 var(--font);
  --markmap-text-color: var(--text);
  --markmap-circle-open-bg: var(--surface);
  --markmap-highlight-node-bg: var(--lit-glow);
}
.g-svg .markmap-foreign strong { font-size: 15px; font-weight: 700; }
.gm-ref { color: var(--text-3); font-size: .86em; margin-right: .4em; font-variant-numeric: tabular-nums; }
.gm-orig { display: block; color: var(--text-3); font-size: .84em; }
.gm-fill {
  display: inline-block; font-size: .78em; font-weight: 700; padding: 0 5px; margin-right: 5px; border-radius: 4px;
  background: #fbe3c4; color: #7a3f00; vertical-align: 1px;
}
.g-status { position: absolute; inset: 0; display: grid; place-items: center; margin: 0; color: var(--text-3); }
.g-status[hidden] { display: none; }
.g-side { border-left: 1px solid var(--line); overflow-y: auto; padding: 14px 16px 24px; background: var(--surface); }
.g-side section + section { margin-top: 16px; }
.g-side h3 { font-size: 13.5px; color: var(--text-2); margin-bottom: 8px; display: flex; gap: 6px; align-items: baseline; flex-wrap: wrap; }
.g-side .h-note { font-weight: 400; font-size: 12px; color: var(--text-3); }
.g-sources, .g-coverage { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.g-sources li { display: grid; grid-template-columns: auto 1fr; gap: 8px; font-size: 13px; }
.g-sources a { font-weight: 600; text-decoration: none; overflow-wrap: anywhere; }
.g-sources a:hover { text-decoration: underline; }
.g-key {
  font-size: 11px; font-weight: 700; padding: 1px 6px; border-radius: 5px; height: fit-content; white-space: nowrap;
  background: var(--accent-soft); color: var(--accent-ink);
}
.g-key.fill, .g-ref.fill { background: #fbe3c4; color: #7a3f00; }
.g-by, .g-why, .g-toc { font-size: 12px; color: var(--text-3); }
.g-toc a { font-weight: 400; margin-left: 4px; text-decoration: underline; }
.g-coverage li { font-size: 13px; display: flex; flex-direction: column; gap: 4px; }
.g-topic { font-weight: 600; }
.g-coverage li.gap .g-topic { color: var(--text-3); }
.g-refs { display: flex; flex-wrap: wrap; gap: 4px; }
.g-ref {
  border: 0; border-radius: 6px; padding: 2px 7px; font-size: 12px; cursor: pointer; text-align: left;
  background: var(--accent-soft); color: var(--accent-ink); max-width: 100%;
}
.g-ref:hover { filter: brightness(.96); text-decoration: underline; }
.g-note { font-size: 12px; color: var(--text-3); }
.g-omitted { font-size: 12px; color: var(--text-3); margin: 16px 0 0; }
:root[data-theme="dark"] .gm-fill, :root[data-theme="dark"] .g-key.fill, :root[data-theme="dark"] .g-ref.fill { background: #4a2f0e; color: #f5c68a; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .gm-fill, :root:not([data-theme="light"]) .g-key.fill,
  :root:not([data-theme="light"]) .g-ref.fill { background: #4a2f0e; color: #f5c68a; }
}
@media (max-width: 900px) {
  dialog.guide { width: 100vw; height: 100dvh; max-height: none; border-radius: 0; border: 0; }
  .g-head { padding: 10px 12px; gap: 8px; }
  .g-body { grid-template-columns: 1fr; grid-template-rows: minmax(0, 1fr) auto; }
  .g-side { border-left: 0; border-top: 1px solid var(--line); max-height: 30dvh; }
}

@media (min-width: 1500px) {
  .panel { width: 480px; }
}

/* ── narrow screens ── */
@media (max-width: 900px) {
  .topbar { gap: 10px; padding: 8px 12px; }
  .brand .sub, .hint-key { display: none; }
  .logo { width: 26px; height: 26px; }
  .progress { order: 5; flex: 1 1 100%; }
  .search { order: 4; flex: 1 1 100%; max-width: none; }
  .actions { margin-left: auto; }
  .only-narrow { display: inline-grid; }
  .side {
    position: absolute; z-index: 30; left: 0; top: 0; bottom: 0; width: min(320px, 88vw);
    transform: translateX(-100%); transition: transform .2s; box-shadow: var(--shadow-lg);
  }
  .side.open { transform: none; }
  .panel {
    position: absolute; z-index: 35; left: 0; right: 0; bottom: 0; width: auto; max-height: 72%;
    border-left: 0; border-top: 1px solid var(--line); border-radius: 18px 18px 0 0; box-shadow: 0 -4px 20px rgba(0, 0, 0, .18);
  }
  .actions select { max-width: 130px; }
  #btn-fit { display: none; }
  .ov-head { flex-direction: column; align-items: flex-start; padding: 14px 16px 4px; gap: 10px; }
  .ov-axis { display: none; }
  .ov-scroll { padding: 10px 16px; overflow: auto; cursor: auto; touch-action: auto; }
  .ov-wrap .zoom-ctl { display: none; }
  .ov-caption { display: none; }
}
@media (max-width: 560px) {
  .seg button { padding: 5px 10px; }
  .brand h1 { font-size: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}