/* BTC 週網格觀測所 — original dark theme, not a clone of any third-party lab */
:root {
  --bg: #0c0b0a;
  --bg-2: #141210;
  --bg-3: #1b1815;
  --surface: #1e1b17;
  --surface-2: #26221c;
  --line: rgba(232, 220, 196, 0.12);
  --line-2: rgba(232, 220, 196, 0.22);
  --text: #f0eadc;
  --text-2: #c4bba8;
  --text-3: #8a8273;
  --ivory: #e8dcc4;
  --jade: #7eb89a;
  --jade-dim: rgba(126, 184, 154, 0.14);
  --cinnabar: #d46a5c;
  --cinnabar-dim: rgba(212, 106, 92, 0.14);
  --bronze: #c9a36a;
  --bronze-dim: rgba(201, 163, 106, 0.16);
  --cyan: #7aa8b8;
  --up: #7eb89a;
  --dn: #d46a5c;
  --warn: #d4a054;
  --ok: #7eb89a;
  --font-sans: "Noto Sans CJK TC", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", "Noto Sans", system-ui, sans-serif;
  --font-serif: "LXGW WenKai TC", "霞鶩文楷 TC", "Noto Serif CJK TC", "Noto Serif TC", serif;
  --font-mono: "Noto Sans Mono CJK TC", "ui-monospace", "SFMono-Regular", Menlo, Consolas, monospace;
  --fs: 16px;
  --lh: 1.7;
  --wrap: 1120px;
  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px;
  --s5: 24px; --s6: 32px; --s7: 48px; --s8: 72px;
  --r: 14px;
  --shadow: 0 12px 40px rgba(0,0,0,.35);
  --header-h: 64px;
}
@media (min-width: 1024px) { :root { --fs: 17px; } }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body {
  font-family: var(--font-sans);
  font-size: var(--fs);
  line-height: var(--lh);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ivory); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--bronze); }
:focus-visible { outline: 2px solid var(--bronze); outline-offset: 3px; }
.skip {
  position: absolute; left: 8px; top: -80px; z-index: 100;
  background: var(--bronze); color: #1a140c; padding: 10px 16px; border-radius: 10px; font-weight: 700;
}
.skip:focus { top: 8px; }

.wrap { width: min(var(--wrap), calc(100% - 40px)); margin-inline: auto; }
.section { padding: var(--s8) 0; }
.section--alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase;
  color: var(--bronze);
}
.eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--bronze); }
h1, h2, h3, .serif { font-family: var(--font-serif); font-weight: 700; letter-spacing: .02em; }
h1 { font-size: clamp(36px, 6vw, 68px); line-height: 1.2; margin: 12px 0 16px; font-weight: 700; }
h2 { font-size: clamp(28px, 3.4vw, 42px); line-height: 1.3; margin: 0 0 12px; }
h3 { font-size: clamp(20px, 2vw, 24px); margin: 0 0 8px; }
.lead { font-size: clamp(17px, 1.4vw, 20px); color: var(--text-2); max-width: 40em; }
.muted { color: var(--text-3); }
.num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
.up { color: var(--up); }
.dn { color: var(--dn); }
.warn { color: var(--warn); }

/* Header */
.header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(12,11,10,.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.header__in {
  width: min(var(--wrap), calc(100% - 32px));
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text); min-height: 44px; }
.brand img { width: 36px; height: 36px; }
.brand__name { display: block; font-family: var(--font-serif); font-size: 18px; line-height: 1.2; }
.brand__sub { display: block; font-size: 11px; letter-spacing: .14em; color: var(--text-3); text-transform: uppercase; }

.nav-toggle { display: none; }
.nav-btn {
  display: none; border: 1px solid var(--line-2); background: var(--surface);
  color: var(--text); border-radius: 10px; min-width: 44px; min-height: 44px; cursor: pointer;
}
.nav { display: flex; flex-wrap: wrap; gap: 4px 2px; justify-content: flex-end; }
.nav a {
  color: var(--text-2); text-decoration: none; font-size: 14px; font-weight: 500;
  padding: 8px 10px; border-radius: 9px; min-height: 40px; display: inline-flex; align-items: center;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--ivory); background: rgba(232,220,196,.06); }

@media (max-width: 900px) {
  .nav-btn { display: inline-flex; align-items: center; justify-content: center; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    background: var(--bg-2); border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px; flex-direction: column; gap: 2px;
  }
  .nav-toggle:checked ~ .nav { display: flex; }
  .nav a { min-height: 44px; }
}

/* Banner */
.banner {
  background: linear-gradient(90deg, rgba(212,106,92,.18), rgba(201,163,106,.08));
  border-bottom: 1px solid rgba(212,106,92,.35);
  color: var(--ivory);
  padding: 10px 0;
  font-size: 14px;
}
.banner__in { width: min(var(--wrap), calc(100% - 40px)); margin-inline: auto; display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line-2); border-radius: 999px;
  padding: 4px 10px; font-size: 12px; font-weight: 700; letter-spacing: .06em;
}
.pill--alert { border-color: rgba(212,106,92,.5); color: #f0c0b8; background: rgba(212,106,92,.1); }
.pill--ok { border-color: rgba(126,184,154,.5); color: var(--jade); background: var(--jade-dim); }
.pill--wait { border-color: rgba(201,163,106,.5); color: var(--bronze); background: var(--bronze-dim); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-3); display: inline-block; }
.dot--on { background: var(--jade); box-shadow: 0 0 0 4px rgba(126,184,154,.18); }
.dot--off { background: var(--cinnabar); box-shadow: 0 0 0 4px rgba(212,106,92,.18); }
.dot--wait { background: var(--warn); }

/* Hero */
.hero { padding: clamp(40px, 8vw, 88px) 0 48px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; right: -8%; top: -20%; width: 420px; height: 420px;
  background: url("../img/taiji.svg") center / contain no-repeat;
  opacity: .06; pointer-events: none;
}
.hero p.lead { margin-bottom: 28px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 10px 18px; border-radius: 12px;
  border: 1px solid var(--line-2); text-decoration: none; font-weight: 700; cursor: pointer;
  background: transparent; color: var(--text); font-family: inherit; font-size: 15px;
}
.btn--primary { background: var(--ivory); color: #1a140c; border-color: var(--ivory); }
.btn--primary:hover { filter: brightness(1.05); color: #1a140c; }
.btn--ghost:hover { border-color: var(--bronze); color: var(--bronze); }

.stat-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 40px;
}
@media (max-width: 800px) { .stat-strip { grid-template-columns: 1fr 1fr; } }
.stat {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r);
  padding: 16px 18px;
}
.stat__k { color: var(--text-3); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.stat__v { font-family: var(--font-serif); font-size: 26px; margin-top: 4px; line-height: 1.25; }
.stat__s { color: var(--text-3); font-size: 13px; margin-top: 4px; }

/* Cards / grids */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}
@media (min-width: 700px) and (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: calc(var(--r) + 2px);
  padding: 20px;
}
.card--jade { border-color: rgba(126,184,154,.35); background: linear-gradient(180deg, var(--jade-dim), var(--surface)); }
.card--alert { border-color: rgba(212,106,92,.4); background: linear-gradient(180deg, var(--cinnabar-dim), var(--surface)); }
.card--bronze { border-color: rgba(201,163,106,.35); }
.card h3 { margin-top: 0; }
.card p { color: var(--text-2); margin: 0 0 8px; }
.kv { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.kv:last-child { border-bottom: 0; }
.kv__k { color: var(--text-3); }
.kv__v { color: var(--text); text-align: right; }

/* Live board */
.live-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 12px; margin-bottom: 24px; }
.live-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 16px; }
@media (max-width: 900px) { .live-grid { grid-template-columns: 1fr; } }
.price-xl { font-family: var(--font-serif); font-size: clamp(36px, 5vw, 56px); line-height: 1.1; font-variant-numeric: tabular-nums; }
.flag {
  display: inline-flex; align-items: center; gap: 6px;
  border-radius: 8px; padding: 2px 8px; font-size: 13px; font-weight: 700;
  border: 1px solid var(--line);
}
.flag--no { background: var(--cinnabar-dim); border-color: rgba(212,106,92,.45); color: #f3b4ac; }
.flag--yes { background: var(--jade-dim); border-color: rgba(126,184,154,.45); color: var(--jade); }
.flag--maybe { background: var(--bronze-dim); border-color: rgba(201,163,106,.45); color: var(--bronze); }
.gua-big { font-family: var(--font-serif); font-size: 42px; line-height: 1; }
.source { font-size: 12px; color: var(--text-3); margin-top: 10px; }

/* Team */
.person {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 16px;
}
.person img {
  width: 64px; height: 64px; border-radius: 50%; object-fit: cover; flex: 0 0 64px;
  border: 1px solid var(--line-2);
}
.person h3 { margin: 0 0 2px; font-size: 18px; }
.person .role { color: var(--bronze); font-size: 12px; letter-spacing: .08em; margin-bottom: 6px; }
.person p { margin: 0; font-size: 14px; color: var(--text-2); }
.veto { color: var(--cinnabar); font-weight: 700; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); }
table { width: 100%; border-collapse: collapse; min-width: 640px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 14px; }
th { color: var(--text-3); font-weight: 600; background: var(--bg-3); font-size: 13px; letter-spacing: .04em; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* Graveyard */
.grave {
  border-left: 3px solid var(--cinnabar);
  background: var(--surface);
  border-radius: 0 var(--r) var(--r) 0;
  padding: 18px 20px;
}
.grave h3 { margin-top: 0; }
.grave .result { font-weight: 700; color: #f3b4ac; }
.chart-frame {
  margin: 12px 0 8px; border: 1px solid var(--line); border-radius: var(--r);
  overflow: hidden; background: #111;
}
.chart-frame img { width: 100%; }
.caption { font-size: 13px; color: var(--text-3); margin: 0 0 8px; }

/* Calculator */
.calc {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 24px; align-items: start;
}
@media (max-width: 900px) { .calc { grid-template-columns: 1fr; } }
label { display: block; font-size: 13px; color: var(--text-3); margin-bottom: 4px; }
input, select {
  width: 100%; min-height: 44px; border-radius: 10px;
  border: 1px solid var(--line-2); background: var(--bg); color: var(--text);
  padding: 8px 12px; font: inherit; font-variant-numeric: tabular-nums;
}
.field { margin-bottom: 14px; }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 600px) { .fields { grid-template-columns: 1fr; } }
.out-box { background: var(--bg-3); border: 1px solid var(--line); border-radius: var(--r); padding: 8px 16px; }
.warnbox {
  margin-top: 14px; padding: 14px 16px; border-radius: 12px;
  border: 1px solid rgba(212,106,92,.45); background: var(--cinnabar-dim);
  color: #f6d2cc; font-size: 14px; display: none;
}
.warnbox.is-on { display: block; }
.okbox {
  margin-top: 14px; padding: 14px 16px; border-radius: 12px;
  border: 1px solid rgba(126,184,154,.4); background: var(--jade-dim);
  color: var(--text-2); font-size: 14px; display: none;
}
.okbox.is-on { display: block; }

/* FAQ */
details.faq {
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--surface); padding: 4px 16px; margin-bottom: 10px;
}
details.faq summary {
  cursor: pointer; font-weight: 700; min-height: 48px; display: flex; align-items: center;
  list-style: none;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; margin-left: auto; color: var(--bronze); font-size: 20px; }
details.faq[open] summary::after { content: "–"; }
details.faq p { color: var(--text-2); margin: 0 0 14px; }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 40px 0 64px; color: var(--text-3); font-size: 14px; }
.footer a { color: var(--text-2); }
.disclaimer {
  border: 1px solid rgba(212,106,92,.35);
  background: rgba(212,106,92,.08);
  border-radius: var(--r);
  padding: 16px 18px;
  color: var(--text-2);
  margin-bottom: 24px;
}
.forbidden { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.forbidden span {
  border: 1px dashed rgba(212,106,92,.5); color: #e8a8a0; border-radius: 999px;
  padding: 4px 12px; font-size: 13px;
}

.steps { counter-reset: step; display: grid; gap: 14px; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: start; }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-family: var(--font-serif); color: var(--bronze); font-size: 20px; padding-top: 2px;
}

.note {
  font-size: 13px; color: var(--text-3); border-left: 2px solid var(--bronze);
  padding-left: 12px; margin: 12px 0;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}