/* 老年友好的电吹管曲库样式 */
:root {
  --bg: #f6f4ef;
  --panel: #ffffff;
  --primary: #0f5132;
  --primary-strong: #0a3d24;
  --accent: #b8581c;
  --text: #1c1a16;
  --muted: #5b5852;
  --border: #d8d3c6;
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --radius: 14px;
  --tap: 56px;
  --fs-base: 20px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  font-size: var(--fs-base);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

.topbar {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #fff;
  padding: 22px 16px 18px;
  text-align: center;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 5;
}
.topbar h1 { margin: 0; font-size: 28px; letter-spacing: 1px; }
.topbar .sub { margin: 6px 0 0; opacity: 0.92; font-size: 16px; }

main { padding: 16px; max-width: 980px; margin: 0 auto; }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.stats .stat {
  background: linear-gradient(160deg, #ffffff, #fdf7ea);
  border: 2px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 14px 8px;
  min-height: 78px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  box-shadow: var(--shadow);
}
.stats .stat .num {
  font-size: 30px;
  font-weight: 800;
  color: var(--primary-strong);
  line-height: 1.1;
  letter-spacing: 1px;
}
.stats .stat .lbl {
  font-size: 16px;
  color: var(--muted);
  font-weight: 600;
}
.stats .stat[data-group="accompany"] .num { color: #1e4caa; }
.stats .stat[data-group="demo"] .num { color: var(--accent); }
.stats .stat[data-group="dynamic_score"] .num { color: var(--primary-strong); }
.stats .stat:active { transform: translateY(1px); }

.modeswitch {
  display: flex;
  gap: 10px;
  margin: 14px 0 10px;
}
.modeswitch .mode {
  flex: 1;
  background: #fff;
  border: 2px solid var(--border);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 17px;
  font-weight: 600;
}
.modeswitch .mode.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.groups {
  margin-top: 8px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.groups.hidden, .tree.hidden { display: none; }
.group-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 76px;
}
.group-card .label { font-size: 22px; font-weight: 700; color: var(--primary-strong); }
.group-card .count {
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 16px;
  font-weight: 700;
}

.tree {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 14px 16px;
  box-shadow: var(--shadow);
}
.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin-bottom: 12px;
  font-size: 16px;
  color: var(--muted);
}
.crumbs a {
  color: var(--primary);
  text-decoration: underline;
  cursor: pointer;
}
.crumbs .sep { color: var(--border); }
.tree-list { display: flex; flex-direction: column; gap: 8px; }
.tree-row {
  background: #fffdf7;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 56px;
  cursor: pointer;
  font-size: 19px;
}
.tree-row.file { background: #fff; cursor: default; }
.tree-row .icon { font-size: 22px; }
.tree-row .name { flex: 1; word-break: break-word; }
.tree-row .meta { font-size: 14px; color: var(--muted); }
.tree-row .actions { display: flex; gap: 8px; }
.tree-row .actions a {
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 15px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.tree-row .actions a.secondary { background: #ece8de; color: var(--text); }

.searchbox {
  display: flex;
  gap: 10px;
  background: var(--panel);
  padding: 14px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  position: sticky;
  top: 92px;
  z-index: 4;
}
#q {
  flex: 1;
  min-width: 0;
  font-size: 22px;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  outline: none;
  min-height: var(--tap);
}
#q:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(15,81,50,0.14); }

button {
  font-size: 18px;
  font-weight: 600;
  padding: 0 18px;
  min-height: var(--tap);
  min-width: var(--tap);
  border: none;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
}
button.ghost { background: #ece8de; color: var(--text); }
button:active { transform: translateY(1px); }

.filters {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chip {
  background: #fff;
  border: 2px solid var(--border);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 17px;
  min-height: 48px;
  min-width: 0;
}
.chip.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}


.results { margin-top: 18px; }
.empty {
  background: var(--panel);
  padding: 24px;
  text-align: center;
  border-radius: var(--radius);
  color: var(--muted);
  border: 1px dashed var(--border);
}

.subbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}
.subbar .chip { font-size: 15px; padding: 8px 12px; min-height: 40px; }

.list-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 4px 4px 12px;
}
.list-head .back {
  background: transparent;
  color: var(--primary);
  text-decoration: underline;
  padding: 0;
  min-height: 0;
  font-weight: 600;
}
.list-head .count { color: var(--muted); font-size: 16px; }

.item {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow);
}
.item .name {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  word-break: break-word;
  line-height: 1.4;
}
.item .meta {
  color: var(--muted);
  font-size: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.item .meta .tag {
  background: #eef3ec;
  color: var(--primary-strong);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 14px;
}
.item .meta .tag.demo { background: #fdecd8; color: var(--accent); }
.item .meta .tag.accomp { background: #e6f0ff; color: #1e4caa; }
.item .actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.item .actions a, .item .actions button {
  background: var(--primary);
  color: #fff;
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 18px;
  text-decoration: none;
  min-height: var(--tap);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.item .actions a.secondary, .item .actions button.secondary {
  background: #ece8de;
  color: var(--text);
}

footer {
  text-align: center;
  padding: 22px 16px 80px;
  color: var(--muted);
  font-size: 15px;
}
footer a { color: var(--primary); margin-left: 12px; }

.player {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  box-shadow: 0 -4px 16px rgba(0,0,0,0.08);
  z-index: 10;
}
.player.hidden { display: none; }
.player-title {
  flex: 1 1 100%;
  font-weight: 600;
  color: var(--primary-strong);
  font-size: 17px;
  word-break: break-word;
}
.player audio { flex: 1 1 240px; min-width: 0; }
.player button { background: #ece8de; color: var(--text); padding: 0 16px; }

@media (max-width: 520px) {
  :root { --fs-base: 19px; }
  .topbar h1 { font-size: 24px; }
  .searchbox { flex-wrap: wrap; }
  #q { flex: 1 1 100%; font-size: 20px; }
  .searchbox button { flex: 1; }
  .item .name { font-size: 20px; }
  .stats .stat { min-height: 70px; }
  .stats .stat .num { font-size: 26px; }
  .group-card .label { font-size: 19px; }
}