/* ==========================================================================
   EvoGO 「月门 / MOONGATE」 whole-site visual base  (Wyns 2026-10-21 decision)
   Source of truth for the look distilled from the EVOGO.ai Business Plan deck:
   night-courtyard ground, glass panels, electric-blue holographic accent, gold
   numbering / hairlines, condensed uppercase English titles + blue Chinese.

   Rules of this file
   - Tokens only under --mg-*; namespaced classes only under .mg-*.
   - No element selectors, no ids: every shell (/b /c /g /class-live /welcome)
     keeps its own component CSS and maps its legacy tokens onto these values.
   - Pure visual: nothing here changes layout hooks, ids, data-* or behaviour.
   - Fonts are loaded by each shell's <head> (Google Fonts):
     Barlow Condensed 500/600/700 + Noto Sans SC 400/500/700 + Roboto 400/500/700
   ========================================================================== */

:root {
  /* ground + surfaces */
  --mg-ground: #060B14;
  --mg-ground-wash:
    radial-gradient(1200px 700px at 70% -10%, rgba(46, 139, 255, 0.16), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(212, 168, 87, 0.10), transparent 60%),
    #060B14;
  --mg-slate: #0B1322;
  --mg-slate-line: rgba(120, 185, 255, 0.14);
  --mg-card: #121F34;                     /* flat fallback = average of the glass gradient over ground */
  --mg-glass: linear-gradient(160deg, rgba(38, 66, 112, 0.42), rgba(10, 20, 40, 0.58));
  --mg-glass-line: rgba(120, 185, 255, 0.30);
  --mg-glass-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.14), 0 10px 30px rgba(0, 0, 0, 0.45);
  --mg-float-shadow: 0 0 0 1px rgba(120, 185, 255, 0.25), 0 18px 46px rgba(0, 0, 0, 0.55), 0 0 40px rgba(46, 139, 255, 0.18);
  --mg-line: rgba(120, 185, 255, 0.12);   /* table rows / hairline dividers */

  /* electric blue */
  --mg-blue: #2E8BFF;
  --mg-blue-text: #5FAEFF;
  --mg-blue-hover: #8CC4FF;
  --mg-blue-glow: rgba(46, 139, 255, 0.35);
  --mg-blue-soft: rgba(46, 139, 255, 0.14);
  --mg-blue-soft-2: rgba(46, 139, 255, 0.10);
  --mg-blue-line: rgba(120, 185, 255, 0.35);
  --mg-blue-grad: linear-gradient(180deg, #3C97FF, #1E73E6);

  /* gold */
  --mg-gold: #D4A857;
  --mg-gold-text: #E3BE73;
  --mg-gold-line: rgba(212, 168, 87, 0.55);
  --mg-gold-corner: rgba(212, 168, 87, 0.75);
  --mg-gold-soft: rgba(212, 168, 87, 0.14);
  --mg-gold-grad: linear-gradient(180deg, #E3BE73, #C9983F);
  --mg-gold-ink: #1A1206;

  /* text */
  --mg-text: #F2F6FC;
  --mg-text-2: #B7C4D8;
  --mg-muted: #7F8FA8;

  /* status (always with icon or label, never colour alone) */
  --mg-ok: #39C27A;
  --mg-warn: #F0A33A;
  --mg-bad: #F26D6D;
  --mg-ok-soft: rgba(57, 194, 122, 0.14);
  --mg-warn-soft: rgba(240, 163, 58, 0.14);
  --mg-bad-soft: rgba(242, 109, 109, 0.14);

  /* board (kept from the existing SVG painters; frame only) */
  --mg-wood-1: #E3BD7B;
  --mg-wood-2: #D2A65E;
  --mg-wood-3: #DDB26F;
  --mg-wood-line: #4A3418;
  --mg-board-shadow: 0 30px 70px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(212, 168, 87, 0.35);

  /* shape */
  --mg-r-card: 10px;
  --mg-r-ctl: 8px;
  --mg-r-pill: 999px;
  --mg-r-modal: 12px;
  --mg-ctl-h: 44px;

  /* type */
  --mg-font-display: 'Barlow Condensed', 'Noto Sans SC', sans-serif;
  --mg-font-zh: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --mg-font-body: Roboto, 'Noto Sans SC', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --mg-font-mono: 'Roboto Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* --------------------------------------------------------------------------
   Surfaces
   -------------------------------------------------------------------------- */
.mg-ground {
  background: var(--mg-ground-wash);
  color: var(--mg-text);
}

.mg-glass {
  background: var(--mg-card);
  background-image: var(--mg-glass);
  border: 1px solid var(--mg-glass-line);
  border-radius: var(--mg-r-card);
  box-shadow: var(--mg-glass-shadow);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.mg-slate {
  background: var(--mg-slate);
  border: 1px solid var(--mg-slate-line);
  border-radius: var(--mg-r-card);
}

.mg-float {
  background: var(--mg-card);
  background-image: var(--mg-glass);
  border: 1px solid var(--mg-glass-line);
  border-radius: var(--mg-r-modal);
  box-shadow: var(--mg-float-shadow);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

/* Gold L-shaped corner ornaments, drawn with background gradients: no extra
   markup. Use on at most 1–2 hero panels per screen. Pair with .mg-glass. */
.mg-corners {
  position: relative;
}
.mg-corners::after {
  content: '';
  position: absolute;
  inset: 6px;
  pointer-events: none;
  border-radius: 2px;
  background-image:
    linear-gradient(var(--mg-gold-corner), var(--mg-gold-corner)),
    linear-gradient(var(--mg-gold-corner), var(--mg-gold-corner)),
    linear-gradient(var(--mg-gold-corner), var(--mg-gold-corner)),
    linear-gradient(var(--mg-gold-corner), var(--mg-gold-corner)),
    linear-gradient(var(--mg-gold-corner), var(--mg-gold-corner)),
    linear-gradient(var(--mg-gold-corner), var(--mg-gold-corner)),
    linear-gradient(var(--mg-gold-corner), var(--mg-gold-corner)),
    linear-gradient(var(--mg-gold-corner), var(--mg-gold-corner));
  background-repeat: no-repeat;
  background-size: 14px 1px, 1px 14px, 14px 1px, 1px 14px, 14px 1px, 1px 14px, 14px 1px, 1px 14px;
  background-position:
    left top, left top,
    right top, right top,
    left bottom, left bottom,
    right bottom, right bottom;
}

/* Gold hairline divider with a small diamond in the middle. */
.mg-divider {
  position: relative;
  height: 1px;
  margin: 18px 0;
  background: linear-gradient(90deg, transparent, var(--mg-gold-line), transparent);
}
.mg-divider::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 6px;
  height: 6px;
  transform: translate(-50%, -50%) rotate(45deg);
  background: var(--mg-gold);
}
.mg-divider--plain::after {
  display: none;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
.mg-display {
  font-family: var(--mg-font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1;
}

/* Page title pattern: ENGLISH <span class="mg-title__zh">/ 中文</span> */
.mg-title {
  font-family: var(--mg-font-display);
  font-weight: 700;
  font-size: 30px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 1;
  color: var(--mg-text);
  margin: 0;
}
.mg-title__zh {
  font-family: var(--mg-font-zh);
  font-weight: 700;
  font-size: 0.8em;
  letter-spacing: 0;
  text-transform: none;
  color: var(--mg-blue-text);
  margin-left: 0.25em;
}

/* Small English eyebrow above a Chinese section heading. */
.mg-eyebrow {
  display: block;
  font-family: var(--mg-font-display);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mg-muted);
  line-height: 1.2;
  margin: 0 0 4px;
}
.mg-eyebrow--gold {
  color: var(--mg-gold-text);
}

/* Section heading (Chinese) */
.mg-h {
  font-family: var(--mg-font-zh);
  font-weight: 700;
  font-size: 16px;
  color: var(--mg-text);
  margin: 0;
  line-height: 1.3;
}

/* Gold step / section numbers: 01 02 03 */
.mg-num {
  font-family: var(--mg-font-display);
  font-weight: 700;
  font-size: 24px;
  letter-spacing: 0.02em;
  color: var(--mg-gold-text);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.mg-tnum {
  font-family: var(--mg-font-body);
  font-variant-numeric: tabular-nums;
}

/* KPI tile typography */
.mg-kpi__label {
  font-family: var(--mg-font-zh);
  font-size: 12px;
  font-weight: 500;
  color: var(--mg-text-2);
  margin: 0 0 6px;
}
.mg-kpi__value {
  font-family: var(--mg-font-display);
  font-weight: 700;
  font-size: 36px;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--mg-text);
  font-variant-numeric: tabular-nums;
}
.mg-kpi__unit {
  font-family: var(--mg-font-body);
  font-weight: 500;
  font-size: 13px;
  color: var(--mg-muted);
  margin-left: 4px;
}
.mg-kpi__unit--go {
  color: var(--mg-gold-text);
  font-family: var(--mg-font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.04em;
}
.mg-kpi__delta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--mg-font-body);
  font-size: 12px;
  color: var(--mg-text-2);
  margin-top: 6px;
}
.mg-kpi__delta.is-up { color: var(--mg-ok); }
.mg-kpi__delta.is-down { color: var(--mg-bad); }

/* --------------------------------------------------------------------------
   Controls
   -------------------------------------------------------------------------- */
.mg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--mg-ctl-h);
  padding: 0 18px;
  border-radius: var(--mg-r-ctl);
  border: 1px solid var(--mg-blue-line);
  background: var(--mg-blue-soft-2);
  color: var(--mg-text);
  font-family: var(--mg-font-body);
  font-weight: 600;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  transition: background-color .15s ease, border-color .15s ease, box-shadow .15s ease, transform .05s ease;
}
.mg-btn:hover { background: var(--mg-blue-soft); border-color: var(--mg-blue-text); }
.mg-btn:active { transform: translateY(1px); }
.mg-btn:focus-visible { outline: 2px solid var(--mg-blue-text); outline-offset: 2px; }
.mg-btn[disabled], .mg-btn[aria-disabled="true"] { opacity: .5; cursor: not-allowed; }

.mg-btn--primary {
  background: var(--mg-blue-grad);
  border: 0;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 8px 24px var(--mg-blue-glow), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}
.mg-btn--primary:hover { background: linear-gradient(180deg, #4EA3FF, #2A7FEF); border: 0; }

.mg-btn--gold {
  background: var(--mg-gold-grad);
  border: 0;
  color: var(--mg-gold-ink);
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(212, 168, 87, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
.mg-btn--gold:hover { background: linear-gradient(180deg, #EBC982, #D4A44A); border: 0; }

.mg-btn--text {
  background: transparent;
  border-color: transparent;
  color: var(--mg-text-2);
  padding: 0 10px;
}
.mg-btn--text:hover { background: var(--mg-blue-soft-2); border-color: transparent; color: var(--mg-text); }

.mg-btn--sm { min-height: 32px; padding: 0 12px; font-size: 13px; }
.mg-btn--icon { width: var(--mg-ctl-h); padding: 0; }
.mg-btn--sm.mg-btn--icon { width: 32px; }

.mg-input {
  width: 100%;
  min-height: var(--mg-ctl-h);
  padding: 0 14px;
  border-radius: var(--mg-r-ctl);
  border: 1px solid rgba(120, 185, 255, 0.22);
  background: var(--mg-slate);
  color: var(--mg-text);
  font-family: var(--mg-font-body);
  font-size: 14px;
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.mg-input::placeholder { color: var(--mg-muted); }
.mg-input:focus { border-color: var(--mg-blue); box-shadow: 0 0 0 3px var(--mg-blue-soft); }
.mg-input[aria-invalid="true"] { border-color: var(--mg-bad); }

.mg-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: var(--mg-r-pill);
  border: 1px solid var(--mg-glass-line);
  background: var(--mg-blue-soft-2);
  color: var(--mg-text-2);
  font-family: var(--mg-font-body);
  font-size: 12px;
  line-height: 1.2;
  white-space: nowrap;
}
.mg-pill::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: .9;
}
.mg-pill--plain::before { display: none; }
.mg-pill--ok { color: var(--mg-ok); background: var(--mg-ok-soft); border-color: rgba(57, 194, 122, 0.35); }
.mg-pill--warn { color: var(--mg-warn); background: var(--mg-warn-soft); border-color: rgba(240, 163, 58, 0.35); }
.mg-pill--bad { color: var(--mg-bad); background: var(--mg-bad-soft); border-color: rgba(242, 109, 109, 0.35); }
.mg-pill--gold { color: var(--mg-gold-text); background: var(--mg-gold-soft); border-color: var(--mg-gold-line); }
.mg-pill--blue { color: var(--mg-blue-text); background: var(--mg-blue-soft); border-color: var(--mg-blue-line); }

/* Navigation item (vertical nav). Selected = blue 14% ground + 3px blue bar. */
.mg-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 0 14px 0 13px;
  border-left: 3px solid transparent;
  border-radius: 0 var(--mg-r-ctl) var(--mg-r-ctl) 0;
  color: var(--mg-text-2);
  font-family: var(--mg-font-zh);
  font-weight: 500;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
}
.mg-nav-item:hover { color: var(--mg-text); background: var(--mg-blue-soft-2); }
.mg-nav-item.on,
.mg-nav-item[aria-current="page"] {
  color: var(--mg-text);
  font-weight: 700;
  background: var(--mg-blue-soft);
  border-left-color: var(--mg-blue);
}

/* Icon in a round soft-blue well */
.mg-icon-well {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--mg-blue-soft);
  box-shadow: inset 0 0 0 1px var(--mg-blue-line);
  color: var(--mg-blue-text);
  flex: 0 0 auto;
}
.mg-icon-well svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* Tables */
.mg-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mg-font-body);
  font-size: 13px;
  color: var(--mg-text);
}
.mg-table th {
  text-align: left;
  font-weight: 500;
  font-size: 12px;
  color: var(--mg-muted);
  padding: 8px 10px;
  border-bottom: 1px solid var(--mg-glass-line);
  white-space: nowrap;
}
.mg-table td {
  padding: 10px;
  border-bottom: 1px solid var(--mg-line);
  font-variant-numeric: tabular-nums;
}
.mg-table tbody tr:hover td { background: var(--mg-blue-soft-2); }
.mg-table td.is-num, .mg-table th.is-num { text-align: right; }

/* --------------------------------------------------------------------------
   Board frame (host element around an existing goban SVG/canvas)
   -------------------------------------------------------------------------- */
.mg-board-frame {
  border-radius: 6px;
  box-shadow: var(--mg-board-shadow);
}

/* AI recommendation point drawn in SVG:
   <circle class="mg-ai-point" r="9"/> + <circle class="mg-ai-ring" r="15"/> */
.mg-ai-point { fill: rgba(46, 139, 255, 0.28); stroke: #5FAEFF; stroke-width: 1.6; }
.mg-ai-ring { fill: none; stroke: rgba(46, 139, 255, 0.35); stroke-width: 1; }

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.mg-text { color: var(--mg-text); }
.mg-text-2 { color: var(--mg-text-2); }
.mg-muted { color: var(--mg-muted); }
.mg-blue { color: var(--mg-blue-text); }
.mg-gold { color: var(--mg-gold-text); }
.mg-glow { box-shadow: 0 8px 24px var(--mg-blue-glow); }
.mg-hairline { border-top: 1px solid var(--mg-line); }

@media (prefers-reduced-motion: reduce) {
  .mg-btn { transition: none; }
}

@media (forced-colors: active) {
  .mg-glass, .mg-slate, .mg-float, .mg-btn, .mg-input, .mg-pill { border-color: CanvasText; }
  .mg-nav-item.on { border-left-color: Highlight; }
}