/* ============================================================
   案例展示页（lab）专属版式
   设计令牌全部沿用 style.css 的 :root（--bg / --brand / --text 等），
   本文件只新增布局，不新增配色，保证与主页色调完全一致。

   结构：板块卡片（.lab-sec）→ 板块头（图标 + 标题 + 说明 + 标签）
        → 可玩舞台（.lab-stage）：案例胶囊（.lab-pills）+ 画布 + 控件 + 说明
   ============================================================ */

.lab-hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--brand); border: 1px solid var(--border-strong);
  padding: 6px 14px; border-radius: 999px; margin-top: 24px;
}

/* ---------------- 板块卡片 ---------------- */
.lab-sec { margin-bottom: 56px; }
.lab-sec:last-child { margin-bottom: 0; }

.lab-sec-head {
  display: flex; align-items: flex-start; gap: 20px;
}
.lab-sec-ico {
  flex: none; width: 60px; height: 60px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 30px; line-height: 1;
  background: var(--grad-soft);
  border: 1px solid var(--border-strong);
}
.lab-sec-head h2 { font-size: clamp(22px, 3vw, 30px); font-weight: 800; letter-spacing: -.01em; }
.lab-sec-head p { margin-top: 8px; color: var(--text-dim); font-size: 15px; max-width: 720px; }

.lab-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0 80px; }
.lab-tagchip {
  font-size: 12px; color: var(--text-dim); background: var(--surface);
  border: 1px solid var(--border); border-radius: 999px; padding: 5px 12px;
}
@media (max-width: 640px) {
  .lab-sec-head { flex-direction: column; gap: 14px; }
  .lab-tags { margin-left: 0; }
}

/* ---------------- 舞台 ---------------- */
.lab-stage {
  margin-top: 22px; border: 1px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-soft), var(--bg));
  overflow: hidden; box-shadow: var(--shadow);
}
.lab-bar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 16px 22px; border-bottom: 1px solid var(--border); background: var(--surface);
}
.lab-bar .lab-hintline { margin-left: auto; font-size: 12.5px; color: var(--text-faint); }

/* 案例胶囊：直接切换当前舞台的案例，不需要跳转 */
.lab-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.lab-pill {
  font-family: inherit; font-size: 13.5px; font-weight: 500;
  padding: 8px 16px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface-2);
  color: var(--text-dim); transition: all .18s ease;
}
.lab-pill:hover { color: var(--text); border-color: var(--border-strong); }
.lab-pill.on {
  background: var(--grad); border-color: transparent; color: #04121f; font-weight: 600;
}

.lab-main { padding: 20px 22px 24px; }
.lab-canvas-wrap {
  position: relative; background: #050914; border: 1px solid var(--border);
  border-radius: var(--radius-sm); overflow: hidden;
}
.lab-cv { display: none; margin: 0 auto; max-width: 900px; }
.lab-loading {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  color: var(--text-faint); font-size: 14px; letter-spacing: .04em;
}

/* 当前案例的标题 / tag / 分数条 */
.lab-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.lab-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 13px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border);
  font-size: 13px;
}
.lab-chip i {
  font-style: normal; font-size: 10.5px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--text-faint);
}
.lab-chip b { font-weight: 600; color: var(--text); }
.lab-chip-tag b { color: var(--brand); }

.lab-score { margin-top: 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.lab-score b { font-family: Consolas, monospace; font-size: 15px; color: var(--brand); }

.lab-hud {
  margin-top: 11px; font-family: Consolas, monospace; font-size: 11.5px;
  color: var(--text-faint); word-break: break-word;
}
.lab-err {
  margin-top: 12px; padding: 12px 14px; border-radius: var(--radius-sm);
  font-size: 13.5px; line-height: 1.7; color: #fca5a5;
  background: rgba(220, 38, 38, .1); border: 1px solid rgba(220, 38, 38, .32);
}
.lab-err-hint { color: var(--text-faint); font-size: 12.5px; }

.lab-ctrl { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; margin-top: 16px; }
.lab-ctl { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-dim); }
.lab-ctl input[type=range] { width: 150px; accent-color: var(--brand); }
.lab-ctl b {
  color: var(--brand); font-family: Consolas, monospace; min-width: 54px;
  display: inline-block; font-size: 13px;
}
.lab-none { font-size: 13px; color: var(--text-faint); }

/* ---------------- 方向面板 ---------------- */
.lab-pad {
  display: none; flex-direction: column; align-items: center; gap: 9px; margin-top: 18px;
  padding: 16px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface);
}
.lab-pad-grid {
  display: grid; grid-template-columns: repeat(3, 54px);
  grid-template-rows: repeat(3, 52px); gap: 5px;
}
.lab-pad-grid button {
  font-family: inherit; font-size: 18px; font-weight: 700; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--surface-2); color: var(--text-dim);
  display: flex; align-items: center; justify-content: center;
  transition: background .08s, transform .08s; -webkit-tap-highlight-color: transparent;
}
.lab-pad-grid button:hover { background: rgba(255, 255, 255, .09); color: var(--text); }
.lab-pad-grid button:active, .lab-pad-grid button.hit {
  background: var(--brand); border-color: var(--brand); color: #04121f; transform: scale(.93);
}
.lab-pad-labels {
  display: grid; grid-template-columns: repeat(3, 54px);
  grid-template-rows: repeat(3, 14px); gap: 5px;
}
.lab-pad-labels span {
  display: flex; align-items: center; justify-content: center; font-size: 9.5px;
  color: var(--text-faint); white-space: nowrap; line-height: 1;
}
.lab-pad-grid button.now {
  border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); color: var(--accent);
}
.lab-pad-grid button.ban { border-color: #ef4444; color: #ef4444; animation: labBan .3s steps(2) 3; }
@keyframes labBan {
  0% { background: #7f1d1d; color: #fff; }
  100% { background: var(--surface-2); color: #ef4444; }
}
@media (prefers-reduced-motion: reduce) {
  .lab-pad-grid button.ban { animation: none; background: rgba(127, 29, 29, .4); }
}

.lab-hint { margin-top: 14px; font-size: 12.5px; color: var(--text-faint); line-height: 1.75; }
.lab-note { margin-top: 18px; font-size: 14.5px; color: var(--text-dim); line-height: 1.85; }
.lab-note b { color: var(--text); }
.lab-note code {
  background: var(--surface-2); padding: 1px 6px; border-radius: 4px;
  font-family: Consolas, monospace; font-size: 12.5px; color: var(--brand);
}
.lab-kv {
  display: grid; grid-template-columns: auto 1fr; gap: 7px 18px; margin-top: 18px;
  padding-top: 18px; border-top: 1px solid var(--border); font-size: 13.5px;
}
.lab-kv dt { color: var(--text-faint); white-space: nowrap; }
.lab-kv dd { color: var(--text-dim); font-family: Consolas, monospace; word-break: break-word; }
@media (max-width: 560px) {
  .lab-kv { grid-template-columns: 1fr; gap: 2px; }
  .lab-kv dd { margin-bottom: 8px; }
}