:root {
  --ink: #1b2430;
  --muted: #5c6775;
  --paper: #f3efe6;
  --card: #fffdf8;
  --line: rgba(27, 36, 48, 0.12);
  --green: #1c6b52;
  --green-deep: #12382d;
  --high: #9c3a2c;
  --high-bg: #f8ebe7;
  --mid: #8a5a10;
  --mid-bg: #f8f1e2;
  --low: #3d5674;
  --low-bg: #e8eef5;
  --shadow: 0 10px 30px rgba(27, 36, 48, 0.06);
  --radius: 18px;
  color-scheme: light;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(28, 107, 82, 0.16), transparent 55%),
    radial-gradient(900px 420px at 110% 0%, rgba(156, 58, 44, 0.1), transparent 50%),
    var(--paper);
}
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px 18px 40px;
}
.login-card {
  width: min(440px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 28px 24px 22px;
  animation: rise 0.45s ease;
}
.eyebrow {
  margin: 0 0 8px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--green);
  font-weight: 700;
}
h1, h2, h3 { font-family: "Songti SC", "Noto Serif SC", "Iowan Old Style", Palatino, serif; font-weight: 600; }
.login h1 { margin: 0 0 8px; font-size: 34px; letter-spacing: -0.03em; }
.lede { margin: 0 0 22px; color: var(--muted); line-height: 1.6; }
label { display: block; font-size: 13px; font-weight: 650; margin-bottom: 8px; }
.field { margin-bottom: 14px; }
input[type="tel"], input[type="text"], textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 14px;
  padding: 14px 14px;
  font-size: 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
textarea {
  min-height: 96px;
  resize: vertical;
  line-height: 1.55;
}
input:focus, textarea:focus {
  outline: none;
  border-color: rgba(28, 107, 82, 0.55);
  box-shadow: 0 0 0 4px rgba(28, 107, 82, 0.12);
}
.row { display: flex; gap: 10px; }
.row > * { flex: 1; }
.btn {
  border: 0;
  border-radius: 14px;
  padding: 13px 16px;
  background: var(--green-deep);
  color: #f7f4ec;
  font-weight: 700;
  transition: transform 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}
.btn:hover { background: #0d2b22; }
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn.secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.file-btn { display: inline-flex; align-items: center; justify-content: center; }
.note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}
.msg {
  min-height: 22px;
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--high);
}
.otp {
  display: flex;
  gap: 8px;
}
.otp input {
  text-align: center;
  font-size: 22px;
  font-weight: 700;
  padding: 12px 0;
  letter-spacing: 0;
}
.otp.shake { animation: shake 0.38s ease; }
.check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  margin: 12px 0 16px;
}
.check input { width: 16px; height: 16px; }

.app { width: min(920px, calc(100% - 28px)); margin: 0 auto; padding: 22px 0 108px; }
.top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-end;
  margin-bottom: 16px;
}
.top h1 { margin: 0; font-size: 36px; letter-spacing: -0.03em; }
.sub { margin: 6px 0 0; color: var(--muted); line-height: 1.55; max-width: 62ch; }
.top-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.stats {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 10px;
  margin: 14px 0;
}
.stat, .panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.stat { padding: 14px 14px 12px; }
.stat b { display: block; font-size: 22px; font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: 12px; }
.stat.high b { color: var(--high); }
.stat.mid b { color: var(--mid); }
.stat.low b { color: var(--low); }
.bar {
  height: 8px;
  border-radius: 99px;
  background: rgba(27, 36, 48, 0.08);
  overflow: hidden;
  margin-top: 10px;
}
.bar i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--green), #d7a15a);
  transition: width 0.35s ease;
}
.panel { padding: 14px; margin-bottom: 12px; }
.profile { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.sync {
  display: flex;
  gap: 14px;
  justify-content: space-between;
  align-items: flex-start;
  border-top: 1px solid var(--line);
  margin-top: 14px;
  padding-top: 14px;
}
.sync-info { flex: 1; min-width: 0; }
.sync-label { display: block; font-size: 13px; font-weight: 650; margin-bottom: 6px; }
.sync-code {
  display: inline-block;
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--green-deep);
  background: rgba(28, 107, 82, 0.08);
  border-radius: 10px;
  padding: 6px 10px;
  word-break: break-all;
  user-select: all;
}
.sync .note { margin-top: 8px; }
.sync-actions { display: flex; flex-direction: column; gap: 8px; width: min(320px, 100%); }
.sync-join { display: flex; gap: 8px; }
.sync-join input { padding: 11px 12px; font-size: 15px; text-transform: uppercase; }
.sync-join .btn { flex: none; }
.toolbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  padding: 10px 0 12px;
  background: linear-gradient(var(--paper) 70%, rgba(243, 239, 230, 0));
}
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.8);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 650;
}
.chip[aria-pressed="true"] { background: var(--green-deep); color: #f7f4ec; border-color: transparent; }
.search { flex: 1; min-width: 180px; }
.search input { padding: 10px 12px; border-radius: 999px; background: rgba(255,253,248,.9); }

.band { margin: 8px 0 22px; }
.band-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
  margin: 8px 2px 10px;
}
.band-head h2 { margin: 0; font-size: 28px; }
.band-head p { margin: 0; color: var(--muted); font-size: 13px; }
.topic { margin: 14px 0 8px; font-size: 16px; color: var(--green-deep); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 16px 16px 14px;
  margin-bottom: 10px;
  box-shadow: var(--shadow);
  border-left: 5px solid var(--low);
  content-visibility: auto;
  contain-intrinsic-size: 180px;
}
.card.high { border-left-color: var(--high); }
.card.mid { border-left-color: var(--mid); }
.card.low { border-left-color: var(--low); }
.q-top { display: flex; justify-content: space-between; gap: 10px; align-items: flex-start; }
.q-title, .en, .sub, .band-head p, .dock span { overflow-wrap: break-word; }
.q-title { margin: 0; font-family: inherit; font-size: 17px; font-weight: 700; line-height: 1.45; }
.badge {
  flex: none;
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 750;
  background: var(--low-bg);
  color: var(--low);
}
.card.high .badge { background: var(--high-bg); color: var(--high); }
.card.mid .badge { background: var(--mid-bg); color: var(--mid); }
.en { margin: 6px 0 0; color: var(--muted); font-size: 13px; }
.hint { margin: 8px 0 10px; font-size: 13px; color: #3e4b3a; background: rgba(28, 107, 82, 0.08); border-radius: 10px; padding: 8px 10px; }
.saved { min-height: 18px; margin: 6px 0 0; font-size: 12px; color: var(--green); }

.dock {
  position: fixed;
  left: 50%;
  bottom: max(14px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  width: min(920px, calc(100% - 20px));
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  padding: 10px;
  border-radius: 18px;
  background: rgba(18, 56, 45, 0.94);
  color: #f6f3ea;
  box-shadow: 0 12px 40px rgba(18, 56, 45, 0.28);
  backdrop-filter: blur(10px);
}
.dock span { font-size: 13px; padding-left: 6px; }
.dock .btn { background: #f3efe6; color: var(--green-deep); white-space: nowrap; }
.empty {
  padding: 28px 8px;
  color: var(--muted);
  text-align: center;
}

.print-sheet { display: none; }
.print-sheet h1 { font-size: 22px; margin: 0 0 4px; }
.print-meta { margin: 0 0 12px; color: #333; font-size: 12px; }
.print-band { margin: 16px 0 8px; font-size: 16px; }
.print-q { break-inside: avoid; margin: 0 0 12px; padding-bottom: 8px; border-bottom: 1px solid #ddd; }
.print-q strong { display: block; margin-bottom: 2px; }
.print-q .meta { color: #555; font-size: 11px; }
.print-q p { margin: 4px 0 0; white-space: pre-wrap; }

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  30%, 70% { transform: translateX(4px); }
  50% { transform: translateX(-6px); }
}
@media (max-width: 720px) {
  html { -webkit-text-size-adjust: 100%; }
  body { overflow-x: clip; }
  .app {
    width: min(920px, calc(100% - 20px));
    padding-top: max(14px, env(safe-area-inset-top));
    padding-bottom: calc(168px + env(safe-area-inset-bottom));
  }
  .top { display: block; }
  .top h1 { font-size: 30px; }
  .sub { font-size: 14px; }
  .top-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin-top: 12px;
  }
  .top-actions .btn { width: 100%; min-height: 44px; }
  .stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
  .stats .stat:first-child { grid-column: 1 / -1; }
  .stat { padding: 12px; }
  .stat b { font-size: 20px; }
  .stat span { display: block; line-height: 1.35; }
  .profile { display: grid; grid-template-columns: 1fr; }
  .toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    margin: 0 -2px;
    padding-bottom: 2px;
  }
  .chips::-webkit-scrollbar { display: none; }
  .chip { flex: none; min-height: 40px; }
  .search { min-width: 0; width: 100%; }
  .search input { min-height: 44px; }
  .band-head { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; }
  .band-head h2 { font-size: 26px; }
  .q-top { display: block; }
  .q-title { font-size: 16px; }
  .badge { margin-top: 8px; display: inline-block; }
  .card { padding: 14px 12px 12px; border-radius: 16px; }
  .sync { display: block; }
  .sync-actions { width: 100%; margin-top: 12px; }
  .sync-join { flex-wrap: wrap; }
  .sync-join input { flex: 1 1 160px; min-width: 0; }
  .dock {
    width: calc(100% - 16px);
    bottom: max(8px, env(safe-area-inset-bottom));
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 10px;
  }
  .dock span { padding-left: 2px; line-height: 1.4; }
  .dock .row { width: 100%; }
  .dock .btn { min-height: 44px; }
}
@media (max-width: 380px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .stats .stat:first-child { grid-column: auto; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}
@media print {
  body { background: #fff; }
  #login, #app { display: none !important; }
  .print-sheet { display: block !important; }
  @page { margin: 14mm; }
}