/* 万象决策树 · 移动优先暗色主题（纯 CSS，零图片素材） */
:root {
  --bg: #0f1220;
  --bg-card: #191d33;
  --bg-elev: #222744;
  --ink: #eef1ff;
  --ink-dim: #9aa3c7;
  --accent: #7c5cff;
  --accent-soft: rgba(124, 92, 255, 0.16);
  --good: #2fd68b;
  --bad: #ff5c7a;
  --warn: #ffb454;
  --radius: 14px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 640px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: env(safe-area-inset-top) 16px env(safe-area-inset-bottom);
}

/* ---------- 头部 ---------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 4px 12px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  font-size: 22px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 12px;
}

.brand-text h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: 0.5px;
}

.tagline {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--ink-dim);
}

.ghost-btn {
  background: transparent;
  color: var(--ink-dim);
  border: 1px solid rgba(238, 241, 255, 0.2);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
}

.ghost-btn:hover { color: var(--ink); border-color: var(--accent); }

.ghost-btn.wide { width: 100%; margin-top: 10px; padding: 14px; font-size: 15px; }

/* ---------- 导航 ---------- */
.app-nav {
  display: flex;
  gap: 6px;
  padding: 4px;
  margin-bottom: 8px;
  background: var(--bg-card);
  border-radius: 14px;
  position: sticky;
  top: 8px;
  z-index: 10;
}

.app-nav a {
  flex: 1;
  text-align: center;
  padding: 10px 0;
  border-radius: 10px;
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

.app-nav a.active {
  color: #fff;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
}

/* ---------- 页面标题 / 题库 ---------- */
.page-title {
  margin: 10px 4px 6px;
  font-size: 18px;
}

.bank-group {
  margin: 18px 4px 8px;
  font-size: 15px;
  color: var(--accent);
}

.bank-item .scene {
  font-size: 14px;
  margin-bottom: 12px;
}

.check-list {
  margin: 0;
  padding-left: 18px;
  font-size: 14px;
}

.check-list li { margin: 6px 0; }

/* ---------- 排行榜 ---------- */
.nick-label {
  display: block;
  font-size: 13px;
  color: var(--ink-dim);
  margin-bottom: 6px;
}

.nick-input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(238, 241, 255, 0.2);
  background: var(--bg-elev);
  color: var(--ink);
  font-size: 15px;
}

.rank-list { display: flex; flex-direction: column; gap: 6px; }

.rank-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-elev);
  border-radius: 10px;
}

.rank-no {
  flex: 0 0 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: rgba(238, 241, 255, 0.1);
  font-weight: 700;
  font-size: 13px;
}

.rank-nick { flex: 1; font-size: 15px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.rank-score { font-weight: 700; color: var(--accent); }

/* ---------- 报错通道 ---------- */
.report-box { margin-top: 12px; }

.report-box select,
.report-box input {
  width: 100%;
  margin-top: 6px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid rgba(238, 241, 255, 0.2);
  background: var(--bg-elev);
  color: var(--ink);
  font-size: 14px;
}

.report-box .ghost-btn { margin-top: 6px; }

/* ---------- 主视图 ---------- */
#view { flex: 1; }

.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin: 8px 0 16px;
}

/* 进度条 */
.progress-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--ink-dim);
}

.progress-track {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: rgba(238, 241, 255, 0.12);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
  transition: width 0.3s ease;
}

/* 题目标签行 */
.q-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.chip {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--bg-elev);
  color: var(--ink-dim);
}

.chip.accent { color: var(--accent); background: var(--accent-soft); }

.diff-dots { letter-spacing: 2px; color: var(--warn); }

/* 局面描述 */
.scene {
  font-size: 16px;
  margin: 0 0 16px;
  white-space: pre-wrap;
}

/* 选项 */
.option-list { display: flex; flex-direction: column; gap: 10px; }

.option-btn {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  text-align: left;
  background: var(--bg-elev);
  color: var(--ink);
  border: 1px solid rgba(238, 241, 255, 0.14);
  border-radius: 12px;
  padding: 14px;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.08s ease, border-color 0.15s ease;
}

.option-btn:active { transform: scale(0.985); }

.option-label {
  flex: 0 0 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: rgba(238, 241, 255, 0.1);
  font-weight: 700;
  font-size: 13px;
}

.option-btn.correct {
  border-color: var(--good);
  background: rgba(47, 214, 139, 0.12);
}

.option-btn.wrong {
  border-color: var(--bad);
  background: rgba(255, 92, 122, 0.1);
}

.option-btn:disabled { cursor: default; }

/* 解析面板 */
.explain {
  margin-top: 16px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 12px 12px 0;
  padding: 14px 16px;
}

.explain h3 { margin: 0 0 8px; font-size: 15px; color: var(--accent); }

.explain p { margin: 6px 0; font-size: 14px; }

.explain .tier-line { color: var(--warn); font-weight: 600; }

.btn-primary {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 14px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

.btn-primary:disabled { opacity: 0.5; cursor: default; }

/* 赛季包 */
.benefit-list { margin: 10px 0 14px; padding-left: 20px; font-size: 14px; line-height: 1.9; }
.price-line { font-size: 26px; font-weight: 800; color: var(--accent); margin: 6px 0 4px; }
.sub-title { margin: 0 0 8px; font-size: 15px; color: var(--accent); }

/* 结果视图 */
.result-hero { text-align: center; padding: 28px 16px; }

.result-tier {
  font-size: 44px;
  font-weight: 800;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.result-rate { font-size: 18px; color: var(--ink-dim); margin-top: 8px; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 20px;
}

.stat {
  background: var(--bg-elev);
  border-radius: 12px;
  padding: 14px 8px;
  text-align: center;
}

.stat b { display: block; font-size: 22px; }

.stat span { font-size: 12px; color: var(--ink-dim); }

/* 欢迎视图 */
.intro-hero { text-align: center; padding: 30px 12px; }

.intro-hero h2 { margin: 0 0 8px; font-size: 22px; }

.intro-hero p { color: var(--ink-dim); font-size: 14px; margin: 6px 0; }

.intro-stats {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin: 18px 0;
  font-size: 13px;
  color: var(--ink-dim);
}

/* 底部 */
.app-footer {
  padding: 18px 4px 24px;
  font-size: 11px;
  color: var(--ink-dim);
  text-align: center;
}

.app-footer p { margin: 4px 0; }

.dim { opacity: 0.7; }