/* ═══ CSCA Basics — editorial academic design system ═══
   Warm paper ground · navy primary (#002147) · China-red accent (#bb0027)
   4px radii · hairline borders · no decorative gradients · SVG icons only */

:root {
  --bg: #f5f4ef;
  --surface: #ffffff;
  --surface-2: #faf9f5;
  --text: #1b2230;
  --muted: #6a7280;
  --border: #e3e1d8;
  --border-light: #ecebe3;

  --navy: #002147;
  --navy-dark: #001528;
  --navy-soft: #eaeef5;
  --red: #bb0027;
  --red-soft: #fbeaed;

  /* semantic aliases kept so existing class hooks still resolve */
  --blue: #002147;
  --blue-soft: #eaeef5;
  --green: #2f7d5b;
  --green-soft: #e8f1ec;
  --purple: #5b6b8c;
  --purple-soft: #eef1f6;
  --amber: #b45309;
  --amber-soft: #f7efe2;

  --radius: 4px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(27, 34, 48, .06);
  --shadow-md: 0 8px 28px rgba(27, 34, 48, .10);

  --font-heading: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-body: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Cambria Math", "Times New Roman", Georgia, serif;
}

* { box-sizing: border-box; }

/* The `hidden` attribute must always win over author `display` rules. */
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* shared SVG icon */
.ic { width: 18px; height: 18px; flex: none; display: block; }
.ic-ok { color: var(--green); }
.ic-no { color: var(--red); }
.ic-warn { color: var(--amber); }
.ic-ok .ic, .ic-no .ic, .ic-warn .ic { width: 15px; height: 15px; }

h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 600; color: var(--navy); line-height: 1.25; }

/* ── Header (navy) ── */
.cl-top {
  background: var(--navy);
  border-bottom: 1px solid var(--navy-dark);
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 40;
}
.cl-top-inner {
  max-width: 1320px;
  margin: 0 auto;
  height: 64px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.cl-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.cl-logo {
  width: 34px; height: 34px;
  background: var(--red);
  color: #fff;
  display: grid; place-items: center;
  font-size: 19px; font-weight: 700;
  border-radius: var(--radius);
  font-family: var(--font-heading);
}
.cl-brand-name {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.cl-search {
  position: relative;
  max-width: 460px;
  width: 100%;
  justify-self: center;
}
.cl-search input {
  width: 100%;
  padding: 9px 12px 9px 38px;
  border: 1px solid rgba(255, 255, 255, .22);
  background: rgba(255, 255, 255, .08);
  color: #fff;
  font-size: 14px;
  font-family: var(--font-body);
  border-radius: var(--radius);
  outline: none;
  transition: border-color .15s, background .15s;
}
.cl-search input::placeholder { color: rgba(255, 255, 255, .5); }
.cl-search input:focus { border-color: rgba(255, 255, 255, .55); background: rgba(255, 255, 255, .14); }
.cl-search-icon {
  position: absolute; left: 11px; top: 50%; transform: translateY(-50%);
  color: rgba(255, 255, 255, .55);
  display: flex;
}
.cl-search-icon .ic { width: 17px; height: 17px; }
.cl-head-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.cl-countdown {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600; color: #b91c1c;
  background: #fef2f2; border: 1px solid #f3c0c6;
  padding: 5px 12px; border-radius: 999px; cursor: pointer; white-space: nowrap;
  line-height: 1;
}
.cl-countdown .ic { width: 14px; height: 14px; }
.cl-countdown:hover { background: #fde8ea; }
.cl-countdown[hidden] { display: none; }
.cl-report-btn {
  display: inline-flex; align-items: center; gap: 7px;
  border: 1px solid rgba(255, 255, 255, .3);
  background: rgba(255, 255, 255, .08);
  color: #fff;
  border-radius: var(--radius);
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
  font-weight: 600;
  font-family: var(--font-body);
  transition: background .15s, border-color .15s;
}
.cl-report-btn .ic { width: 16px; height: 16px; }
.cl-report-btn:hover { background: var(--red); border-color: var(--red); }
.cl-back {
  display: inline-flex; align-items: center; gap: 5px;
  color: rgba(255, 255, 255, .72);
  font-size: 13px; font-weight: 600; text-decoration: none;
}
.cl-back .ic { width: 16px; height: 16px; }
.cl-back:hover { color: #fff; }
.cl-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .14);
  color: rgba(255, 255, 255, .85);
  display: grid; place-items: center;
  cursor: default;
}
.cl-avatar .ic { width: 18px; height: 18px; }

/* ── Language toggle ── */
.cl-lang { display: inline-flex; border: 1px solid rgba(255,255,255,.3); border-radius: var(--radius); overflow: hidden; }
.cl-lang-btn {
  border: none; background: rgba(255,255,255,.08); color: rgba(255,255,255,.72);
  padding: 8px 12px; font-size: 13px; font-weight: 600; cursor: pointer; font-family: var(--font-body);
  transition: background .15s, color .15s;
}
.cl-lang-btn + .cl-lang-btn { border-left: 1px solid rgba(255,255,255,.3); }
.cl-lang-btn.active { background: #fff; color: #002147; }
.cl-lang-btn:not(.active):hover { background: rgba(255,255,255,.18); color: #fff; }

/* ── Shell: sidebar + content ── */
.cl-shell {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  gap: 0;
}
.cl-side {
  position: sticky;
  top: 64px;
  align-self: flex-start;
  width: 240px;
  flex-shrink: 0;
  padding: 24px 18px 40px;
  border-right: 1px solid var(--border);
  min-height: calc(100vh - 64px);
}
.cl-side-group + .cl-side-group { margin-top: 26px; }
.cl-side-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 8px 10px;
}
.cl-tab {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid transparent;
  border-left: 3px solid transparent;
  background: transparent;
  color: #44506a;
  padding: 9px 12px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  text-align: left;
  margin-bottom: 2px;
  transition: background .12s, color .12s, border-color .12s;
}
.cl-tab .ic { width: 18px; height: 18px; color: #5b6b8c; }
.cl-tab-tx { line-height: 1; }
.cl-tab-en { font-size: 11px; color: var(--muted); font-weight: 500; margin-left: auto; }
/* Language mode: EN shows English label, ZH shows Chinese */
body.lang-en .cl-tab-tx { display: none; }
body.lang-en .cl-tab-en { display: inline; margin-left: 0; font-size: 13px; color: var(--navy); font-weight: 600; }
/* ── Language switch: EN mode hides Chinese primary text, promotes English ── */
body.lang-en .l-zh { display: none !important; }
body.lang-en .subj-en,
body.lang-en .d-en,
body.lang-en .t-en,
body.lang-en .fs-en,
body.lang-en .ct-en,
body.lang-en .root-node-en,
body.lang-en .tec-en,
body.lang-en .path-subj-head .subj-en {
  display: block;
  font-size: inherit;
  line-height: 1.5;
  color: var(--ink, #14141f);
  font-weight: 600;
  opacity: 1;
  font-family: var(--font-body, inherit);
  margin: 2px 0 0;
}
body.lang-en .cl-topic-card .t-en { margin-top: 4px; }
/* Logo: EN shows "C", ZH shows 学 */
.cl-logo-en { display: none; }
body.lang-en .cl-logo .l-zh { display: none !important; }
body.lang-en .cl-logo-en { display: inline; }
/* Path names: EN promotes .path-en, hides Chinese primary */
body.lang-en .path-name .l-zh { display: none !important; }
body.lang-en .path-name .path-en { display: inline; color: inherit; font-size: inherit; font-weight: 600; margin-left: 0; }
/* Instrument tabs: EN promotes .si-en, hides Chinese name */
body.lang-en .sim-instr-tab .l-zh { display: none !important; }
body.lang-en .si-en { display: inline; font-size: 13px; font-weight: 600; opacity: 1; color: inherit; margin-left: 0; }
/* ── ZH mode: hide every English span so the Chinese page shows Chinese only ── */
body:not(.lang-en) .subj-en,
body:not(.lang-en) .d-en,
body:not(.lang-en) .t-en,
body:not(.lang-en) .fs-en,
body:not(.lang-en) .ct-en,
body:not(.lang-en) .ct-ex-en,
body:not(.lang-en) .root-node-en,
body:not(.lang-en) .tec-en,
body:not(.lang-en) .si-en,
body:not(.lang-en) .path-en,
body:not(.lang-en) .cl-tab-en,
body:not(.lang-en) .cl-logo-en { display: none !important; }
.cl-tab:hover { background: var(--navy-soft); color: var(--navy); }
.cl-tab:hover .ic { color: var(--navy); }
.cl-tab.active {
  background: var(--surface);
  color: var(--navy);
  border-left-color: var(--red);
  box-shadow: var(--shadow-sm);
}
.cl-tab.active .ic { color: var(--red); }

.cl-main { flex: 1; min-width: 0; padding: 30px 32px 72px; }
.cl-panel { }

/* ═══ KB Panel ═══ */
.cl-subjects { display: flex; gap: 12px; margin-bottom: 22px; flex-wrap: wrap; }
.cl-subj {
  border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius);
  padding: 14px 18px; cursor: pointer; flex: 1 1 200px; min-width: 180px;
  max-width: 340px; transition: border-color .15s, box-shadow .15s;
}
.cl-subj:hover { border-color: var(--navy); box-shadow: var(--shadow-sm); }
.cl-subj h3 { margin: 0 0 4px; font-size: 17px; font-family: var(--font-heading); }
.cl-subj .subj-en { font-size: 12.5px; color: var(--muted); }
.cl-subj .subj-meta { font-size: 12px; color: var(--muted); margin-top: 6px; display: flex; gap: 14px; }
.cl-subj.active { border-color: var(--navy); box-shadow: 0 0 0 2px var(--navy-soft); }

.cl-topics { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.cl-topic-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; cursor: pointer; transition: border-color .12s, transform .12s, box-shadow .12s;
}
.cl-topic-card:hover { border-color: var(--navy); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.cl-topic-card .t-header { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 8px; }
.cl-topic-card .t-num { width: 28px; height: 28px; border-radius: var(--radius); background: var(--navy); color: #fff; display: grid; place-items: center; font-size: 13px; font-weight: 700; flex-shrink: 0; }
.cl-topic-card h4 { margin: 0; font-size: 15px; font-family: var(--font-heading); line-height: 1.3; }
.cl-topic-card .t-en { font-size: 11.5px; color: var(--muted); display: block; }
.cl-topic-card .t-subs { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 5px; }
.cl-topic-card .t-sub { font-size: 11px; background: var(--surface-2); padding: 2px 8px; border-radius: 3px; white-space: nowrap; color: var(--muted); }
.cl-topic-card .t-badge { display: inline-block; font-size: 10.5px; padding: 1px 7px; border-radius: 3px; margin-top: 8px; }
.t-badge-full { background: var(--navy-soft); color: var(--navy); }

.cl-detail { margin-top: 24px; }
.cl-detail:empty { display: none; }
.detail-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow-sm);
}
.detail-card h2 { margin: 0 0 4px; font-size: 23px; }
.detail-card .d-en { color: var(--muted); font-size: 13.5px; margin: 0 0 16px; }
.lesson-sub { color: var(--muted); font-size: 13.5px; margin: 0 0 16px; }
.detail-card .d-concept { font-size: 14.5px; color: #2c3540; margin-bottom: 18px; line-height: 1.7; }
.detail-card h3 { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--red); margin: 22px 0 10px; font-family: var(--font-body); font-weight: 700; }

.formula-grid { display: grid; gap: 12px; }
.formula-row {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 14px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.formula-left { font-weight: 600; font-size: 13.5px; color: #2c3540; min-width: 140px; }
.formula-right { font-family: var(--font-mono); font-size: 15px; color: var(--navy); flex: 1; }
.formula-note { font-size: 11.5px; color: var(--muted); width: 100%; }
/* inline math render (mTex) */
.formula-right sup, .formula-right sub { line-height: 0; font-size: .72em; }
.mfrac { display: inline-flex; flex-direction: column; vertical-align: middle; text-align: center; margin: 0 3px; font-size: .95em; line-height: 1.15; }
.mfrac i { font-style: normal; padding: 0 4px; border-bottom: 1px solid currentColor; }
.mfrac i:last-child { border-bottom: none; }
.mfn { font-style: normal; }
.macc { position: relative; display: inline-block; }
.macc-vec::before { content: "→"; position: absolute; top: -0.8em; left: 0; right: 0; text-align: center; font-size: .8em; }
.macc-hat::before { content: "^"; position: absolute; top: -0.95em; left: 0; right: 0; text-align: center; font-size: .9em; }
.macc-bar::before { content: ""; position: absolute; top: -0.05em; left: 0; right: 0; border-top: 1px solid currentColor; }
.msqrt { border-top: 1px solid currentColor; padding: 0 2px; }

.example-block { background: var(--amber-soft); border: 1px solid #ecd9b8; border-radius: var(--radius); padding: 14px 16px; }
.example-block .ep { font-weight: 600; margin-bottom: 10px; font-size: 14px; }
.example-block .es { margin: 6px 0; font-size: 13.5px; padding-left: 16px; border-left: 3px solid var(--amber); }
.example-block .etip { font-size: 12px; color: var(--muted); margin-top: 8px; }

.practice-grid { display: grid; gap: 10px; }
.practice-item {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 14px; font-size: 14px;
}
.practice-item .pq { font-weight: 500; }
.practice-item .pa { color: var(--green); font-weight: 600; cursor: pointer; user-select: none; margin-top: 6px; display: inline-block; }
.practice-item .pa:hover { text-decoration: underline; }

.curriculum-box {
  background: var(--navy-soft); border: 1px solid #c8d4e6; border-radius: var(--radius);
  padding: 12px 16px; font-size: 13.5px; margin-top: 10px; line-height: 1.6;
}

/* ═══ Academic Chinese ═══ */
.cn-header { margin-bottom: 20px; }
.cn-header h2 { margin: 0 0 4px; font-size: 22px; }
.cn-header p { color: var(--muted); margin: 0 0 14px; font-size: 14px; }
.cn-levels { display: flex; gap: 8px; flex-wrap: wrap; }
.cn-lvl {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius);
  padding: 8px 15px; font-size: 13.5px; cursor: pointer; font-weight: 600; transition: all .15s;
  font-family: var(--font-body);
}
.cn-lvl.active { background: var(--navy); border-color: var(--navy); color: #fff; }

.cn-glossary { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; }
.cn-term {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; box-shadow: var(--shadow-sm);
}
.cn-term .ct-zh { font-size: 20px; font-weight: 700; color: var(--navy); font-family: var(--font-heading); }
.cn-term .ct-en { font-size: 13px; color: var(--muted); margin: 2px 0 6px; }
.cn-term .ct-py { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.cn-term .ct-ex { font-size: 13px; color: #2c3540; margin: 4px 0; padding-left: 12px; border-left: 2px solid var(--navy); }

.cn-reading { max-width: 720px; }
.cn-text {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; font-size: 15px; line-height: 1.8; box-shadow: var(--shadow-sm);
}
.cn-q { margin: 14px 0 0; }
.cn-q-item {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 16px; margin-bottom: 8px;
}
.cn-q-item .qq { font-size: 13.5px; font-weight: 500; margin-bottom: 6px; }
.cn-opts { display: flex; flex-wrap: wrap; gap: 8px; }
.cn-opt {
  border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius);
  padding: 5px 12px; font-size: 13px; cursor: pointer; transition: all .12s;
}
.cn-opt:hover { border-color: var(--navy); }
.cn-opt.chosen { background: var(--navy); color: #fff; border-color: var(--navy); }
.cn-opt.correct { background: var(--green); color: #fff; border-color: var(--green); }
.cn-opt.wrong { background: var(--red); color: #fff; border-color: var(--red); }

.cn-search-wrap { margin: 0 0 16px; }
#cnSearch {
  width: 100%; max-width: 420px; padding: 10px 14px; font-size: 14px;
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface);
  font-family: var(--font-body);
}
#cnSearch:focus { outline: none; border-color: var(--navy); box-shadow: 0 0 0 2px var(--navy-soft); }

/* read-aloud buttons */
.cn-spk {
  border: none; background: var(--navy-soft); color: var(--navy);
  border-radius: var(--radius); padding: 0 6px; font-size: 13px; cursor: pointer; margin-left: 8px; vertical-align: middle;
  display: inline-flex; align-items: center;
}
.cn-spk .ic { width: 15px; height: 15px; }
.cn-spk:hover { background: var(--navy); color: #fff; }
.rd-spk {
  border: 1px solid var(--navy); background: var(--navy-soft); color: var(--navy);
  border-radius: var(--radius); padding: 5px 12px; font-size: 12.5px; font-weight: 700; cursor: pointer;
  margin-left: auto; display: inline-flex; align-items: center; gap: 5px;
}
.rd-spk .ic { width: 15px; height: 15px; }
.rd-spk:hover { background: var(--navy); color: #fff; }

/* reading training layout */
.rd-layout { display: grid; grid-template-columns: 260px 1fr; gap: 18px; align-items: start; }
.rd-list { display: grid; gap: 8px; position: sticky; top: 88px; }
.rd-item {
  text-align: left; border: 1px solid var(--border); background: var(--surface);
  border-radius: var(--radius); padding: 10px 12px; cursor: pointer; transition: all .12s; display: grid; gap: 3px;
}
.rd-item:hover { border-color: var(--navy); }
.rd-item.active { border-color: var(--navy); background: var(--navy-soft); }
.rd-scene { font-size: 11px; color: var(--muted); font-weight: 600; }
.rd-title { font-size: 14.5px; font-weight: 700; color: var(--text); }
.rd-meta { font-size: 12px; color: var(--navy); }
.rd-passage-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.rd-passage-head h4 { margin: 0; font-size: 18px; }
.rd-qs { margin-top: 18px; display: grid; gap: 14px; }
.rd-q { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px; }
.rd-qq { font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.rd-opts { display: flex; flex-wrap: wrap; gap: 8px; }
.rd-opt {
  border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius);
  padding: 6px 14px; font-size: 13.5px; cursor: pointer; transition: all .12s;
}
.rd-opt:hover { border-color: var(--navy); }
.rd-opt.locked { cursor: default; }
.rd-opt.correct { background: var(--green-soft); border-color: #9cc7b3; color: var(--green); font-weight: 700; }
.rd-opt.chosen-correct { box-shadow: 0 0 0 2px var(--green) inset; }
.rd-opt.chosen-wrong { background: #fbeaed; border-color: #e7a6b2; color: var(--red); }
.rd-fb { font-size: 13px; margin-top: 8px; min-height: 16px; }
.rd-fb.ok { color: var(--green); font-weight: 600; }
.rd-fb.no { color: var(--red); font-weight: 600; }

/* ═══ Mental Math ═══ */
.mm-header { margin-bottom: 16px; }
.mm-header h2 { margin: 0 0 4px; font-size: 22px; }
.mm-header p { color: var(--muted); margin: 0; font-size: 14px; }
.mm-layout {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm); max-width: 560px; margin-bottom: 24px;
}
.mm-timer {
  font-size: 52px; font-weight: 800; color: var(--navy); text-align: center;
  line-height: 1; margin-bottom: 16px; font-variant-numeric: tabular-nums;
}
.mm-timer span { font-size: 18px; color: var(--muted); }
.mm-timer.warn { color: var(--amber); }
.mm-timer.danger { color: var(--red); animation: pulse .6s infinite alternate; }
@keyframes pulse { from { opacity: 1; } to { opacity: .55; } }
.mm-problem { font-size: 18px; font-weight: 600; text-align: center; margin-bottom: 16px; padding: 14px; background: var(--surface-2); border-radius: var(--radius); font-variant-numeric: tabular-nums; }
.mm-input { display: flex; gap: 8px; margin-bottom: 12px; }
.mm-input input { flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 16px; outline: none; font-family: var(--font-body); }
.mm-input input:focus { border-color: var(--navy); box-shadow: 0 0 0 2px var(--navy-soft); }
.mm-input button { padding: 10px 18px; border-radius: var(--radius); border: none; font-size: 14px; font-weight: 600; cursor: pointer; font-family: var(--font-body); }
#mmSubmit { background: var(--navy); color: #fff; }
#mmNext { background: var(--green); color: #fff; }
.mm-feedback { font-size: 14px; font-weight: 600; text-align: center; min-height: 24px; margin-bottom: 8px; }
.mm-score { font-size: 13px; color: var(--muted); text-align: center; }
.mm-score b { color: var(--green); }

.mm-tech { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.mm-tech-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow-sm);
}
.mm-tech-card h4 { margin: 0 0 6px; font-size: 15px; font-family: var(--font-heading); }
.mm-tech-card .tec-en { font-size: 12px; color: var(--muted); display: block; margin-bottom: 8px; }
.mm-tech-card .tec-desc { font-size: 13.5px; color: #2c3540; margin: 0 0 8px; }
.mm-tech-card .tec-ex { font-size: 13px; background: var(--navy-soft); border: 1px solid #c8d4e6; border-radius: var(--radius); padding: 8px 12px; font-family: var(--font-mono); }

.mm-tools { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 16px 0 4px; }
.mm-filter { display: flex; align-items: center; gap: 6px; }
.mm-filter-label { font-size: 13px; color: var(--muted); font-weight: 600; }
.mmf {
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: var(--radius); padding: 6px 12px; font-size: 13px; cursor: pointer; transition: all .12s; font-weight: 600;
  font-family: var(--font-body);
}
.mmf:hover { border-color: var(--navy); }
.mmf.active { background: var(--navy); color: #fff; border-color: var(--navy); }
.mm-pool { font-size: 12px; color: var(--muted); margin-left: 4px; }
.mm-daily-btn {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--green); background: var(--green-soft); color: #1f5e44;
  border-radius: var(--radius); padding: 6px 14px; font-size: 13px; cursor: pointer; font-weight: 700; transition: all .12s;
  font-family: var(--font-body);
}
.mm-daily-btn .ic { width: 15px; height: 15px; }
.mm-daily-btn:hover { background: var(--green); color: #fff; }
.mm-daily-streak { font-size: 13px; color: #8a5a12; font-weight: 600; }
.mm-daily-bar { margin: 10px 0 4px; }
.mdb-text { font-size: 14px; margin-bottom: 6px; }
.mdb-track { height: 8px; background: #e7e5dd; border-radius: 99px; overflow: hidden; }
.mdb-fill { height: 100%; background: var(--green); border-radius: 99px; transition: width .3s; }
.mdb-done { font-size: 15px; font-weight: 600; color: #1f5e44; background: var(--green-soft); border: 1px solid #b6dcc8; border-radius: var(--radius); padding: 12px 14px; }

.mm-diff {
  display: inline-block; font-size: 11px; font-weight: 700; padding: 1px 8px; border-radius: 3px;
  margin-right: 8px; vertical-align: middle;
}
.mm-diff-easy { background: var(--green-soft); color: #1f5e44; border: 1px solid #b6dcc8; }
.mm-diff-medium { background: var(--amber-soft); color: #8a5a12; border: 1px solid #ecd9b8; }
.mm-diff-hard { background: #fbeaed; color: #8f1f33; border: 1px solid #e7a6b2; }

.mm-adapt-btn {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--purple); background: var(--purple-soft); color: #3c4a66;
  border-radius: var(--radius); padding: 6px 14px; font-size: 13px; cursor: pointer; font-weight: 700; transition: all .12s;
  font-family: var(--font-body);
}
.mm-adapt-btn .ic { width: 15px; height: 15px; }
.mm-adapt-btn:hover { background: var(--purple); color: #fff; }
.mm-adapt-btn.active { background: var(--purple); color: #fff; }

/* ═══ Diagnosis ═══ */
.dx-form {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  box-shadow: var(--shadow-sm); margin-bottom: 24px;
}
.dx-subj { display: flex; gap: 14px; }
.dx-subj label { font-size: 14px; font-weight: 500; cursor: pointer; display: inline-flex; align-items: center; gap: 5px; }
.dx-select { padding: 9px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 13.5px; min-width: 220px; font-family: var(--font-body); background: var(--surface); }
.dx-date { padding: 9px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 13.5px; font-family: var(--font-body); }
.dx-btn { padding: 9px 18px; background: var(--navy); color: #fff; border: none; border-radius: var(--radius); font-size: 14px; font-weight: 600; cursor: pointer; font-family: var(--font-body); }
.dx-btn:hover { background: #001528; }

.dx-result { }
.dx-summary { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow-sm); margin-bottom: 16px; }
.dx-summary h3 { margin: 0 0 8px; font-size: 18px; }
.dx-gap { margin-bottom: 12px; }
.dx-gap h4 { font-size: 14px; margin: 0 0 6px; color: var(--red); font-family: var(--font-body); }
.dx-gap ul { margin: 0; padding-left: 18px; font-size: 13.5px; display: grid; gap: 4px; }
.dx-plan { }
.dx-plan h4 { font-size: 14px; margin: 20px 0 8px; color: var(--green); font-family: var(--font-body); }
.dx-plan-day {
  display: flex; align-items: flex-start; gap: 10px; padding: 8px 12px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 6px;
}
.dx-plan-day .day-num { width: 30px; height: 30px; border-radius: 50%; background: var(--navy); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 700; flex-shrink: 0; }
.dx-plan-day .day-task { font-size: 13.5px; }

/* ═══ Foundation Floor (地基) ═══ */
.found-intro {
  background: var(--surface-2);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 20px; font-size: 14px; line-height: 1.75; color: #2c3540; margin-bottom: 18px;
}
.found-intro b { color: var(--red); }
.found-subj-head { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 18px; margin: 4px 0 14px; box-shadow: var(--shadow-sm); }
.found-subj-head h2 { margin: 0 0 4px; font-size: 19px; }
.found-subj-head p { margin: 0; color: var(--muted); font-size: 13.5px; }

.found-progress { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.fp-bar { flex: 1; height: 8px; background: #e7e5dd; border-radius: 99px; overflow: hidden; }
.fp-fill { height: 100%; border-radius: 99px; transition: width .3s; background: var(--navy); }
.fp-text { font-size: 13px; font-weight: 600; color: var(--muted); white-space: nowrap; }

.found-skills { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 12px; margin-bottom: 22px; }
.found-skill { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; box-shadow: var(--shadow-sm); }
.fs-check { display: flex; gap: 10px; align-items: flex-start; cursor: pointer; }
.fs-check input { margin-top: 4px; width: 16px; height: 16px; accent-color: var(--navy); flex-shrink: 0; }
.fs-name { font-size: 14.5px; font-weight: 600; }
.fs-name .fs-en { font-size: 11.5px; color: var(--muted); margin-left: 6px; font-weight: 500; }
.fs-why { font-size: 12.5px; color: #2c3540; margin: 3px 0; }
.fs-bridge { font-size: 12px; color: var(--purple); background: var(--purple-soft); border-radius: 3px; padding: 5px 9px; margin-top: 4px; display: flex; align-items: center; gap: 5px; }
.fs-bridge .ic { width: 14px; height: 14px; }

.found-lesson-title { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--red); margin: 8px 0 12px; font-weight: 700; font-family: var(--font-body); }
.found-lesson { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; cursor: pointer; transition: all .12s; box-shadow: var(--shadow-sm); }
.found-lesson:hover { border-color: var(--navy); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.found-lesson .t-header { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 8px; }
.found-lesson .t-num { width: 28px; height: 28px; border-radius: var(--radius); background: var(--navy); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 700; flex-shrink: 0; }
.found-lesson h4 { margin: 0; font-size: 15px; font-family: var(--font-heading); line-height: 1.3; }
.found-back { color: var(--navy); font-size: 13.5px; font-weight: 600; cursor: pointer; display: inline-flex; align-items: center; gap: 5px; margin-bottom: 12px; user-select: none; }
.found-back:hover { text-decoration: underline; }

/* concept animations */
.anim-box {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px 16px;
  margin: 14px 0 18px;
  box-shadow: var(--shadow-sm);
}
.anim-label { font-size: 13px; font-weight: 700; color: var(--purple); margin-bottom: 8px; display: inline-flex; align-items: center; gap: 6px; }
.anim-label .ic { width: 15px; height: 15px; }
.anim-label small { font-weight: 500; color: var(--muted); font-size: 11px; }
.anim-svg { width: 100%; max-width: 360px; height: auto; display: block; margin: 0 auto; background: #fff; border-radius: var(--radius); border: 1px solid var(--border); }

/* ═══ Instrument Simulator ═══ */
.sim-wrap { max-width: 880px; margin: 0 auto; }
.sim-head h3 { margin: 4px 0 6px; font-size: 20px; }
.sim-sub { color: var(--muted); font-size: 14px; margin: 0 0 16px; max-width: 720px; }
.sim-readout { display: flex; gap: 24px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.sim-live { font-size: 15px; } .sim-live b { font-size: 22px; color: var(--navy); font-variant-numeric: tabular-nums; }
.sim-score { font-size: 14px; color: var(--muted); } .sim-score b { color: var(--green); font-size: 18px; }
.sim-caliper { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 10px; box-shadow: var(--shadow-sm); overflow-x: auto; }
.sim-controls { display: flex; gap: 10px; margin: 16px 0 10px; flex-wrap: wrap; }
.sim-btn { border: 1px solid var(--border); background: var(--surface); padding: 10px 18px; border-radius: var(--radius); font-size: 14px; font-weight: 600; cursor: pointer; font-family: var(--font-body); }
.sim-btn:hover { border-color: #c8ccd2; }
.sim-btn-primary { background: var(--navy); color: #fff; border-color: var(--navy); }
.sim-btn-primary:hover { background: #001528; }
.sim-feedback { min-height: 22px; font-size: 14px; font-weight: 600; margin: 4px 0; }
.sim-hint { font-size: 12.5px; color: var(--muted); background: var(--amber-soft); border: 1px solid #ecd9b8; border-radius: var(--radius); padding: 9px 12px; margin-top: 8px; }

.sim-instr-tabs { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.sim-instr-tab {
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px;
  border: 1px solid var(--border); background: var(--surface);
  padding: 8px 16px; border-radius: var(--radius); cursor: pointer; font-size: 15px; font-weight: 600;
  transition: all .1s; font-family: var(--font-body);
}
.sim-instr-tab:hover { border-color: #c8ccd2; }
.sim-instr-tab.active { background: var(--navy); color: #fff; border-color: var(--navy); }
.sim-instr-tab .si-en { font-size: 10.5px; font-weight: 500; opacity: .8; }

.sim-scoreboard { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 8px; font-size: 14px; }
.sb-item b { font-size: 16px; color: var(--navy); }
.sb-streak b { color: var(--amber); }
.sb-best b { color: var(--green); }
.sim-ach {
  font-size: 13px; font-weight: 700; padding: 3px 10px; border-radius: 99px;
  background: #eeebe3; color: #9a958a; border: 1px solid var(--border); opacity: .8;
  display: inline-flex; align-items: center; gap: 5px;
}
.sim-ach .ic { width: 14px; height: 14px; }
.sim-ach.on { background: var(--amber-soft); color: #8a5a12; border-color: #ecd9b8; opacity: 1; }
.sim-btn-ghost { background: var(--surface); border: 1px solid var(--border); color: var(--text); display: inline-flex; align-items: center; gap: 6px; }
.sim-btn-ghost .ic { width: 15px; height: 15px; }
.sim-btn-ghost:hover { border-color: var(--navy); color: var(--navy); }
.sim-wronglist { margin-top: 14px; display: grid; gap: 8px; }
.swl-empty { font-size: 13px; color: var(--muted); padding: 10px 12px; background: var(--surface); border: 1px dashed var(--border); border-radius: var(--radius); }
.swl-item {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 14px;
}
.swl-info { font-size: 13.5px; }
.swl-info b { color: var(--navy); }
.swl-prac {
  border: 1px solid var(--navy); background: var(--navy-soft); color: var(--navy);
  border-radius: var(--radius); padding: 5px 14px; font-size: 13px; font-weight: 700; cursor: pointer; white-space: nowrap;
}
.swl-prac:hover { background: var(--navy); color: #fff; }

/* ═══ Learning Path ═══ */
.path-head { max-width: 880px; margin: 0 auto 18px; }
.path-head h2 { margin: 4px 0 6px; font-size: 20px; }
.path-head p { color: var(--muted); font-size: 14px; margin: 0; max-width: 760px; }
.path-subj { margin-bottom: 26px; }
.path-subj-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 4px 0 4px 12px; margin-bottom: 12px; border-left: 3px solid var(--red); }
.path-subj-head h3 { margin: 0; font-size: 17px; }
.path-subj-head .subj-en { font-size: 12px; color: var(--muted); font-weight: 500; margin-left: 6px; }
.path-count { font-size: 12.5px; color: var(--muted); white-space: nowrap; }
.path-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 10px; }
.path-item {
  display: flex; align-items: center; gap: 10px;
  background: var(--surface); border: 1px solid var(--border);
  border-left: 3px solid var(--pc, var(--navy));
  border-radius: var(--radius); padding: 10px 12px; cursor: pointer;
  transition: transform .1s, box-shadow .1s;
}
.path-item:hover { transform: translateX(3px); box-shadow: var(--shadow-sm); }
.path-tag { font-size: 11px; font-weight: 700; padding: 2px 7px; border-radius: 3px; background: var(--pc, var(--navy)); color: #fff; flex-shrink: 0; }
.path-found .path-tag { background: #e2e0d8; color: #44506a; }
.path-name { font-size: 14px; font-weight: 600; flex: 1; }
.path-name .path-en { font-size: 11px; color: var(--muted); font-weight: 500; margin-left: 6px; }
.path-status { font-size: 12px; font-weight: 600; white-space: nowrap; display: inline-flex; align-items: center; gap: 4px; }
.path-status .ic { width: 14px; height: 14px; }
.path-status.ok { color: var(--green); }
.path-status.todo { color: var(--amber); }

/* ═══ Root knowledge map (根基) ═══ */
.root-body { max-width: 1100px; margin: 0 auto; }
.root-intro { margin-bottom: 24px; }
.root-intro h2 { font-family: var(--font-heading); font-size: 28px; font-weight: 600; margin: 0 0 8px; color: var(--navy); }
.root-intro p { margin: 0; font-size: 15px; color: var(--muted); line-height: 1.7; max-width: 760px; }
.root-search-wrap { position: relative; max-width: 480px; margin-bottom: 28px; }
.root-search-wrap input {
  width: 100%; padding: 12px 14px 12px 42px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font-size: 14px; border-radius: var(--radius); outline: none;
  font-family: var(--font-body);
}
.root-search-wrap input:focus { border-color: var(--navy); box-shadow: 0 0 0 2px var(--navy-soft); }
.root-search-wrap input::placeholder { color: #9ca3af; }
.root-search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: #9ca3af; display: flex; }
.root-search-icon .ic { width: 18px; height: 18px; }
.root-group { margin-bottom: 44px; }
.root-group-head { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 4px; }
.root-group-icon {
  width: 34px; height: 34px; flex-shrink: 0;
  display: grid; place-items: center; color: var(--red);
  border: 1px solid var(--border); background: var(--surface-2); border-radius: var(--radius);
}
.root-group-icon .ic { width: 19px; height: 19px; }
.root-group-head h3 { font-family: var(--font-heading); font-size: 22px; font-weight: 600; margin: 0; color: var(--navy); }
.root-group-intro { margin: 4px 0 18px; font-size: 14px; color: var(--muted); }
.root-nodes { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }
.root-node {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color .12s ease, transform .12s ease, box-shadow .12s ease;
}
.root-node:hover { border-color: var(--navy); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.root-node-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.root-node-icon {
  width: 38px; height: 38px;
  border: 1px solid var(--border); background: var(--navy-soft); color: var(--navy);
  display: grid; place-items: center;
  font-size: 18px; font-weight: 700; font-family: var(--font-mono);
}
.root-node-icon .ic { width: 20px; height: 20px; }
.root-node-status {
  font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: 3px;
  text-transform: uppercase; letter-spacing: .04em;
}
.root-node-status.status-partial { background: var(--navy-soft); color: var(--navy); }
.root-node-status.status-progress { background: var(--amber-soft); color: #8a5a12; }
.root-node-status.status-none { background: #eeebe3; color: #6a7280; }
.root-node-head { margin-bottom: 10px; }
.root-node-title { font-size: 17px; font-weight: 700; color: var(--text); margin-right: 8px; font-family: var(--font-heading); }
.root-node-en { font-size: 12.5px; color: var(--muted); }
.root-node-essence { margin: 0 0 16px; font-size: 13.5px; line-height: 1.65; color: #4b5563; }
.root-links { display: flex; flex-wrap: wrap; gap: 8px; }
.root-link {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: #374151;
  border-radius: var(--radius);
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all .12s ease;
  font-family: var(--font-body);
}
.root-link:hover { border-color: var(--navy); color: var(--navy); background: var(--navy-soft); }

/* ═══ Mock Exam ═══ */
.mock-start { max-width: 560px; margin: 24px auto; text-align: center; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm); }
.mock-start h3 { margin: 0 0 6px; font-size: 22px; }
.mock-start p { color: var(--muted); font-size: 14px; margin: 0 0 16px; }
.mock-meta { list-style: none; padding: 0; margin: 0 0 20px; display: grid; gap: 8px; text-align: left; }
.mock-meta li { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 14px; font-size: 14px; display: flex; align-items: center; gap: 8px; }
.mock-start-btn { background: var(--navy); color: #fff; border: none; border-radius: var(--radius); padding: 12px 32px; font-size: 16px; font-weight: 700; cursor: pointer; font-family: var(--font-body); }
.mock-start-btn:hover { background: #001528; }
.mock-note { font-size: 12px; color: var(--muted); margin-top: 16px; }
.mock-bar { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 12px; }
.mock-timer-wrap { font-size: 16px; } .mock-timer-wrap b { font-size: 22px; color: var(--red); font-variant-numeric: tabular-nums; }
.mock-secs { display: flex; gap: 8px; flex: 1; flex-wrap: wrap; }
.mock-sec-tab {
  border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius); padding: 7px 13px;
  font-size: 13.5px; font-weight: 600; cursor: pointer; display: flex; flex-direction: column; gap: 2px; transition: all .12s;
  font-family: var(--font-body);
}
.mock-sec-tab.active { background: var(--navy); color: #fff; border-color: var(--navy); }
.mock-sec-done { font-size: 11px; opacity: .8; font-weight: 500; }
.mock-submit { border: none; background: var(--green); color: #fff; border-radius: var(--radius); padding: 9px 20px; font-size: 14px; font-weight: 700; cursor: pointer; font-family: var(--font-body); }
.mock-submit:hover { background: #256e50; }
.mock-progress { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.mock-qs { display: grid; gap: 14px; }
.mock-passage { background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--purple); border-radius: var(--radius); padding: 14px 16px; font-size: 14.5px; line-height: 1.8; }
.mock-q { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px; }
.mock-qq { font-size: 14.5px; font-weight: 600; margin-bottom: 10px; }
.mock-opts { display: flex; flex-wrap: wrap; gap: 8px; }
.mock-opt { border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius); padding: 6px 14px; font-size: 13.5px; cursor: pointer; transition: all .12s; }
.mock-opt:hover { border-color: var(--navy); }
.mock-opt.chosen { background: var(--navy); color: #fff; border-color: var(--navy); }
.mock-result { max-width: 760px; margin: 0 auto; }
.mock-result h3 { margin: 0 0 10px; font-size: 20px; }
.mock-res-total { font-size: 18px; font-weight: 700; }
.mock-res-total b { color: var(--navy); font-size: 24px; }
.mock-res-note { font-size: 12px; color: var(--muted); margin: 6px 0 18px; }
.mock-res-sec { margin-bottom: 14px; }
.mock-res-head { font-size: 14px; margin-bottom: 6px; }
.mock-res-bar { height: 8px; background: #e7e5dd; border-radius: 99px; overflow: hidden; }
.mock-res-fill { height: 100%; background: var(--navy); border-radius: 99px; }
.mock-res-actions { margin: 16px 0; }
.mock-restart { background: var(--navy); color: #fff; border: none; border-radius: var(--radius); padding: 10px 22px; font-size: 14px; font-weight: 700; cursor: pointer; font-family: var(--font-body); }
.mock-restart:hover { background: #001528; }
.mock-res-wrong-sec { margin-top: 14px; }
.mock-res-wrong-sec h4 { font-size: 14px; color: var(--red); margin: 0 0 8px; font-family: var(--font-body); }
.mock-res-wrong { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 14px; margin-bottom: 8px; font-size: 13.5px; }
.mock-res-ans { font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.mock-res-allok { background: var(--green-soft); border: 1px solid #b6dcc8; border-radius: var(--radius); padding: 16px; text-align: center; font-weight: 600; color: #1f5e44; }

/* ═══ Progress report modal ═══ */
.modal-mask { position: fixed; inset: 0; background: rgba(16, 23, 42, .5); display: grid; place-items: center; z-index: 50; padding: 16px; }
.modal-card { background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow-md); max-width: 560px; width: 100%; max-height: 88vh; overflow-y: auto; padding: 22px 24px; }
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.modal-head h3 { margin: 0; font-size: 19px; display: inline-flex; align-items: center; gap: 8px; }
.modal-head h3 .ic { width: 18px; height: 18px; }
.modal-close { border: none; background: var(--surface-2); color: #44506a; border-radius: var(--radius); width: 32px; height: 32px; font-size: 16px; cursor: pointer; display: grid; place-items: center; }
.modal-close:hover { background: #e7e5dd; }
.rp-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-bottom: 18px; }
.rp-stat { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; }
.rp-num { font-size: 22px; font-weight: 800; color: var(--navy); display: inline-flex; align-items: center; gap: 6px; }
.rp-num .ic { width: 18px; height: 18px; }
.rp-label { font-size: 12px; color: var(--muted); margin-top: 2px; }
.rp-weak { margin: 0; padding-left: 18px; font-size: 13.5px; display: grid; gap: 5px; }
.rp-weak .rp-empty { color: var(--muted); list-style: none; }
.rp-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.rp-btn { border: none; background: var(--navy); color: #fff; border-radius: var(--radius); padding: 9px 16px; font-size: 13.5px; font-weight: 700; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-body); }
.rp-btn .ic { width: 15px; height: 15px; }
.rp-btn:hover { background: #001528; }
.rp-btn-ghost { background: var(--surface); border: 1px solid var(--border); color: var(--text); display: inline-flex; align-items: center; gap: 6px; }
.rp-btn-ghost .ic { width: 15px; height: 15px; }
.rp-btn-ghost:hover { border-color: var(--navy); color: var(--navy); }
.rp-foot { font-size: 11.5px; color: var(--muted); margin-top: 12px; }

/* empty / placeholder */
.cl-empty { text-align: center; color: var(--muted); padding: 40px; }
.cl-empty h3 { margin: 0 0 6px; font-size: 18px; }

/* ═══ Responsive ═══ */
@media (max-width: 940px) {
  .cl-shell { flex-direction: column; }
  .cl-side {
    position: static; width: 100%; min-height: 0;
    border-right: none; border-bottom: 1px solid var(--border);
    padding: 14px 16px; display: flex; gap: 16px; overflow-x: auto;
  }
  .cl-side-group { margin-top: 0 !important; display: flex; gap: 6px; align-items: center; flex-wrap: nowrap; }
  .cl-side-label { display: none; }
  .cl-tab { width: auto; margin-bottom: 0; white-space: nowrap; border-left-width: 1px; }
  .cl-tab-en { display: none; }
  .cl-main { padding: 22px 16px 48px; }
}
@media (max-width: 720px) {
  .cl-top-inner { grid-template-columns: 1fr auto; gap: 12px; }
  .cl-search { grid-column: 1 / -1; grid-row: 2; max-width: none; justify-self: stretch; }
  .cl-brand-name { font-size: 17px; }
  .rd-layout { grid-template-columns: 1fr; }
  .rd-list { position: static; grid-template-columns: 1fr 1fr; top: auto; }
  .root-nodes { grid-template-columns: 1fr; }
  .root-intro h2 { font-size: 24px; }
  .rp-grid { grid-template-columns: 1fr; }
}