:root {
  --bg: #0e1116;
  --bg-soft: #161b22;
  --panel: #1a2029;
  --panel-2: #212936;
  --border: #2a323f;
  --border-soft: #232b36;
  --text: #e6edf3;
  --muted: #93a1b1;
  --faint: #6b7888;
  --accent: #4f9cf9;
  --accent-2: #7c5cff;
  --green: #3fb950;
  --amber: #d29922;
  --red: #f85149;
  --chip: #263042;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 78% -10%, #1c2740 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px clamp(16px, 4vw, 40px);
  border-bottom: 1px solid var(--border-soft);
  background: rgba(14, 17, 22, 0.7);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  font-size: 30px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px 10px;
  line-height: 1;
}
.topbar h1 { font-size: clamp(17px, 2.4vw, 21px); margin: 0; letter-spacing: 0.2px; }
.tag { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.ghost-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 13.5px;
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 999px;
  white-space: nowrap;
  transition: 0.15s;
}
.ghost-link:hover { color: var(--text); border-color: var(--accent); }

/* ---------- layout ---------- */
.layout {
  display: grid;
  grid-template-columns: minmax(320px, 420px) 1fr;
  gap: 22px;
  padding: 26px clamp(16px, 4vw, 40px);
  max-width: 1320px;
  margin: 0 auto;
  align-items: start;
}
.panel {
  background: linear-gradient(180deg, var(--panel) 0%, var(--bg-soft) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.input-panel { position: sticky; top: 92px; }

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.panel-head h2 { font-size: 15px; margin: 0; color: var(--text); }

/* ---------- fields ---------- */
.field { display: block; margin-top: 18px; }
.field-label {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 7px;
  font-weight: 600;
  letter-spacing: 0.2px;
}
.field-label em { color: var(--faint); font-style: normal; font-weight: 400; }
select, input[type="text"] {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 12px;
  font-size: 14px;
  font-family: inherit;
  transition: 0.15s;
}
select:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 156, 249, 0.18);
}
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.two-col label { display: block; }

/* ---------- toggles ---------- */
.toggles { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 11px;
  font-size: 13px;
  cursor: pointer;
  transition: 0.12s;
  user-select: none;
}
.toggle:hover { border-color: #3a4757; }
.toggle input { accent-color: var(--accent); width: 15px; height: 15px; margin: 0; }
.toggle.on { border-color: var(--accent); background: rgba(79, 156, 249, 0.1); }

/* ---------- buttons ---------- */
.primary-btn {
  margin-top: 22px;
  width: 100%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  border: none;
  border-radius: 11px;
  padding: 14px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.3px;
  transition: 0.15s;
}
.primary-btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.primary-btn:active { transform: translateY(0); }
.mini-btn {
  background: var(--panel-2);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 12.5px;
  cursor: pointer;
  transition: 0.12s;
  font-family: inherit;
}
.mini-btn:hover { color: var(--text); border-color: var(--accent); }
.hint { color: var(--faint); font-size: 12px; margin: 12px 0 0; text-align: center; }

/* ---------- empty state ---------- */
.empty-state { text-align: center; padding: 40px 18px; }
.empty-emoji { font-size: 46px; }
.empty-state h2 { font-size: 19px; margin: 14px 0 10px; }
.empty-state p { color: var(--muted); max-width: 560px; margin: 0 auto 18px; font-size: 14px; }
.empty-why {
  list-style: none;
  padding: 0;
  max-width: 460px;
  margin: 0 auto;
  text-align: left;
  display: grid;
  gap: 8px;
}
.empty-why li {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: 9px;
  padding: 10px 14px;
  font-size: 13.5px;
  color: var(--muted);
}
.empty-why li::before { content: "✓ "; color: var(--green); font-weight: 700; }

/* ---------- results ---------- */
.hidden { display: none !important; }
.result-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-soft);
}
.toolbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.score-chip {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  background: var(--chip);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 999px;
}
.score-chip b { color: var(--accent); }

.block { margin: 26px 0; }
.block:first-child { margin-top: 6px; }
.block-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 4px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-soft);
}
.block-title .idx {
  color: var(--accent-2);
  font-variant-numeric: tabular-nums;
}
.block-sub { color: var(--faint); font-size: 12.5px; margin: 0 0 14px; }

/* dimension cards */
.dim {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: 11px;
  padding: 14px 16px;
  margin-bottom: 11px;
}
.dim-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 6px;
}
.dim-name { font-weight: 650; font-size: 14.5px; }
.dim-meta { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }
.weight-pill {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: rgba(79, 156, 249, 0.12);
  border-radius: 999px;
  padding: 3px 9px;
  font-variant-numeric: tabular-nums;
}
.method-pill {
  font-size: 11px;
  color: var(--muted);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 9px;
}
.dim-why { color: var(--muted); font-size: 13px; margin: 0 0 10px; }
.levels { display: grid; gap: 5px; }
.level {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 10px;
  font-size: 12.8px;
  color: var(--muted);
  align-items: start;
}
.level .lv {
  text-align: center;
  font-weight: 700;
  border-radius: 6px;
  padding: 1px 0;
  font-size: 11.5px;
  height: fit-content;
}
.lv0 { background: rgba(248, 81, 73, 0.16); color: #ff7b72; }
.lv1 { background: rgba(210, 153, 34, 0.16); color: #e3b341; }
.lv2 { background: rgba(88, 166, 255, 0.16); color: #79c0ff; }
.lv3 { background: rgba(63, 185, 80, 0.16); color: #56d364; }

/* gates + lists */
.gate, .li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: 9px;
  padding: 11px 14px;
  margin-bottom: 8px;
  font-size: 13.5px;
}
.gate { border-left: 3px solid var(--red); }
.gate .mark { color: var(--red); font-weight: 800; }
.li .mark { color: var(--accent); font-weight: 800; }

.case-group { margin-bottom: 16px; }
.case-group h4 {
  font-size: 13px;
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.case-tag {
  font-size: 10.5px;
  font-weight: 700;
  border-radius: 5px;
  padding: 2px 7px;
  letter-spacing: 0.3px;
}
.tag-golden { background: rgba(63,185,80,.16); color: #56d364; }
.tag-edge { background: rgba(88,166,255,.16); color: #79c0ff; }
.tag-adv { background: rgba(248,81,73,.16); color: #ff7b72; }
.tag-reg { background: rgba(210,153,34,.16); color: #e3b341; }
.cases { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.cases li {
  font-size: 13px;
  color: var(--muted);
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
}
.cases li b { color: var(--text); font-weight: 600; }

.passline {
  background: linear-gradient(180deg, rgba(79,156,249,.08), rgba(124,92,255,.05));
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 16px 18px;
}
.passline .big { font-size: 26px; font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; }
.passline p { margin: 6px 0 0; color: var(--muted); font-size: 13px; }

/* ---------- how ---------- */
.how {
  max-width: 1000px;
  margin: 20px auto 40px;
  padding: 30px clamp(16px, 4vw, 40px);
}
.how h2 { font-size: 20px; text-align: center; margin-bottom: 24px; }
.how-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.how-grid > div {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.how-grid h3 { font-size: 15px; margin: 0 0 8px; }
.how-grid p { color: var(--muted); font-size: 13.5px; margin: 0; }
.how-note { text-align: center; color: var(--faint); font-size: 13px; margin-top: 22px; }
.how-note strong { color: var(--muted); }

/* ---------- footer ---------- */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 22px clamp(16px, 4vw, 40px);
  border-top: 1px solid var(--border-soft);
  color: var(--faint);
  font-size: 12.5px;
}

.toast {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--green);
  color: #06210c;
  font-weight: 700;
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 13.5px;
  opacity: 0;
  pointer-events: none;
  transition: 0.25s;
  z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .layout { grid-template-columns: 1fr; }
  .input-panel { position: static; }
  .topbar { flex-wrap: wrap; }
  .toggles { grid-template-columns: 1fr; }
}