:root {
  --ink: #2b2418;
  --ink-soft: #5a4e3c;
  --muted: #8a7d68;
  --paper: #f4ead6;
  --paper-2: #efe3c8;
  --card: rgba(255, 250, 240, 0.78);
  --cinnabar: #9c3b2e;
  --cinnabar-deep: #7a2a21;
  --celadon: #5d6b4a;
  --gold: #c4a35a;
  --line: rgba(90, 70, 40, 0.14);
  --shadow: 0 10px 28px rgba(70, 48, 20, 0.08);
  --radius: 18px;
  --tab-h: calc(58px + env(safe-area-inset-bottom, 0px));
  --top-pad: calc(12px + env(safe-area-inset-top, 0px));
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --kai: "Kaiti SC", "STKaiti", "Noto Serif SC", "KaiTi", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; min-height: 100%; }
html { background: #1c1812; }
body {
  color: var(--ink);
  font-family: var(--sans);
  background:
    radial-gradient(1200px 700px at 50% -10%, rgba(196, 163, 90, 0.18), transparent 55%),
    linear-gradient(180deg, #2a2218 0%, #16120e 100%);
}

.app-shell {
  width: min(430px, 100%);
  height: 100dvh;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(180deg, rgba(247, 236, 212, 0.97), rgba(236, 220, 188, 0.95)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.05'/%3E%3C/svg%3E");
  box-shadow: 0 0 0 1px rgba(255, 236, 200, 0.08), 0 30px 80px rgba(0, 0, 0, 0.35);
}

.app-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 88% 8%, rgba(156, 59, 46, 0.08), transparent 28%),
    radial-gradient(circle at 8% 92%, rgba(93, 107, 74, 0.1), transparent 26%);
  z-index: 0;
}

.mist {
  position: absolute;
  inset: auto -20% 18% -20%;
  height: 220px;
  background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.22), transparent 68%);
  filter: blur(18px);
  pointer-events: none;
  z-index: 0;
}

.screen {
  position: relative;
  z-index: 1;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.screen[hidden] { display: none !important; }

.topbar {
  padding: var(--top-pad) 20px 10px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 1px solid rgba(156, 59, 46, 0.12);
  box-shadow: 0 1px 0 rgba(196, 163, 90, 0.28);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.seal {
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--cinnabar);
  color: var(--cinnabar);
  border-radius: 4px;
  display: grid;
  place-items: center;
  font-family: var(--kai);
  font-size: 18px;
  letter-spacing: 0;
  transform: rotate(-6deg);
  background: rgba(156, 59, 46, 0.06);
}
.brand h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.18em;
}
.brand p {
  margin: 2px 0 0;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.28em;
}
.icon-btn {
  min-width: 44px;
  min-height: 44px;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 18px;
}
.icon-btn[aria-pressed="true"] { color: var(--cinnabar); }

.search-wrap { padding: 6px 20px 12px; }
.search {
  width: 100%;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 252, 246, 0.7);
  padding: 0 16px;
  font-size: 14px;
  font-family: inherit;
  color: var(--ink);
  outline: none;
}
.search:focus { border-color: rgba(156, 59, 46, 0.35); }

.chips { display: flex; gap: 8px; padding: 0 20px 14px; overflow-x: auto; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto;
  height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.chip.active {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #fff8ee;
}

.list { padding: 0 16px 8px; display: grid; gap: 12px; }
.card {
  display: block;
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 16px 14px 18px;
  color: inherit;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--cinnabar), transparent);
  opacity: 0.55;
}
.card::after {
  content: "";
  position: absolute;
  right: -18px;
  bottom: -22px;
  width: 86px;
  height: 86px;
  border: 8px solid rgba(156, 59, 46, 0.06);
  border-radius: 50%;
}
.card .meta {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.12em;
}
.dot { width: 3px; height: 3px; border-radius: 50%; background: var(--gold); }
.card h2 {
  margin: 8px 0 8px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.12em;
}
.preview {
  margin: 0;
  font-family: var(--kai);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}
.tags { margin-top: 10px; display: flex; gap: 6px; flex-wrap: wrap; }
.tag {
  font-size: 11px;
  color: var(--celadon);
  background: rgba(93, 107, 74, 0.08);
  border-radius: 999px;
  padding: 2px 8px;
}

.empty {
  margin: 48px 24px;
  text-align: center;
  color: var(--muted);
  font-family: var(--kai);
}

.detail-top {
  padding: var(--top-pad) 8px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.detail-actions { display: flex; }
.paper {
  margin: 4px 16px 0;
  padding: 22px 20px 28px;
  min-height: 52vh;
  background:
    linear-gradient(180deg, rgba(255, 251, 242, 0.5), transparent 40%),
    rgba(255, 248, 234, 0.55);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.poem-head { text-align: center; }
.poem-head .dynasty {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--cinnabar);
  border: 1px solid rgba(156, 59, 46, 0.28);
  padding: 2px 8px;
  border-radius: 999px;
}
.poem-head h2 {
  margin: 12px 0 6px;
  font-family: var(--serif);
  font-size: 30px;
  letter-spacing: 0.2em;
  font-weight: 600;
}
.poem-head .by {
  margin: 0;
  font-family: var(--kai);
  color: var(--ink-soft);
  letter-spacing: 0.18em;
}
.preface {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  text-align: justify;
}
.body {
  margin-top: 22px;
  font-family: var(--kai);
  font-size: 18px;
  line-height: 2.05;
  letter-spacing: 0.08em;
}
.body p { margin: 0 0 1em; text-align: justify; }
.body.verse p { text-align: center; margin: 0 0 0.15em; }
.body.vertical {
  writing-mode: vertical-rl;
  height: min(62vh, 520px);
  margin: 28px auto 0;
  font-size: 22px;
  line-height: 2.1;
  letter-spacing: 0.28em;
}
.guide {
  margin: 14px 20px 0;
  padding: 14px 16px;
  border-left: 2px solid var(--gold);
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.75;
  background: rgba(255, 250, 240, 0.45);
}

.player-card {
  margin: 16px 16px 0;
  padding: 16px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
}
.player-card h3 {
  margin: 0 0 6px;
  font-family: var(--serif);
  letter-spacing: 0.16em;
  font-size: 18px;
}
.player-card p { margin: 0 0 14px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.toggle-row { display: flex; gap: 8px; }
.toggle {
  flex: 1;
  min-height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 252, 246, 0.7);
  font-family: inherit;
  color: var(--ink);
}
.toggle.on {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #fff8ee;
}

.tabbar {
  position: relative;
  flex-shrink: 0;
  height: var(--tab-h);
  padding: 6px 10px env(safe-area-inset-bottom, 8px);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: rgba(247, 236, 214, 0.96);
  border-top: 1px solid var(--line);
  box-shadow: 0 -8px 20px rgba(80, 50, 20, 0.04);
  z-index: 5;
}
.tab {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.16em;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-height: 44px;
}
.tab svg { width: 22px; height: 22px; }
.tab.active { color: var(--cinnabar-deep); font-weight: 600; }

.toast {
  position: absolute;
  left: 50%;
  bottom: calc(var(--tab-h) + 16px);
  transform: translateX(-50%);
  background: rgba(43, 36, 24, 0.88);
  color: #f6edd8;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 12px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 8;
}
.toast.show { opacity: 1; }

@media (min-width: 760px) {
  body { padding: 24px 0; }
  .app-shell {
    height: calc(100dvh - 48px);
    border-radius: 28px;
  }
}