/* 界面按学堂 Xuetang 品牌令牌（同 MyGeniBook genibook/static/brand/tokens.css）；阅读正文的底色与字色只用护眼配色（见 eyecore.js PALETTES）。 */
:root {
  --xt-ink: #2A3646;           /* 文字 */
  --xt-cinnabar: #E14B2A;      /* 朱砂：CTA、激活态 */
  --xt-cinnabar-dark: #B23319; /* 按下态、3D 按钮阴影 */
  --xt-sunshine: #FFC24B;      /* 只用于提醒徽标等高亮 */
  --xt-sunshine-dark: #D99B23;
  --xt-sunshine-soft: #FFF3D6;
  --xt-teal: #4FB3A9;          /* 进度条、完成态 */
  --xt-mint: #EAF4EE;          /* 页面底色 */
  --xt-paper: #FDFCF8;         /* 卡片、导航条 */
  --xt-line: #DCE8DE;          /* 2px 描边 */
  --ink: var(--xt-ink);
  --muted: #6B7787;
  --line: var(--xt-line);
  --surface: var(--xt-paper);
  --canvas: var(--xt-mint);
  --display: 'Fredoka', 'Nunito', 'Noto Sans SC', 'PingFang SC', sans-serif;
  --sans: 'Nunito', 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --serif: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', 'STSong', 'SimSun', serif;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--canvas);
  -webkit-tap-highlight-color: transparent;
  font-size: 16px;
  line-height: 1.5;
}
body.in-reader { overflow: hidden; background: #000; }
button { font: inherit; color: inherit; cursor: pointer; }
input, select { font: inherit; }
[hidden] { display: none !important; }

/* ---------- 应用框架 ---------- */
.appbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 8px;
  padding: calc(var(--safe-top) + 10px) 16px 10px;
  background: var(--xt-paper); color: var(--ink); border-bottom: 2px solid var(--xt-line);
}
.appbar h1 { flex: 1; margin: 0; font-family: var(--display); font-size: 21px; font-weight: 600; }
.appbar .back { background: none; border: 0; color: var(--ink); font-size: 28px; line-height: 1; padding: 0 8px 0 0; }
.chip { border: 0; background: var(--xt-cinnabar); color: #fff; border-radius: 999px; padding: 6px 16px; font-family: var(--display); font-weight: 600; box-shadow: 0 3px 0 var(--xt-cinnabar-dark); }
.chip.off { background: var(--ink); box-shadow: 0 3px 0 #18202B; }
main { max-width: 760px; margin: 0 auto; padding: 16px 16px calc(var(--safe-bottom) + 32px); }
.card { background: var(--surface); border: 2px solid var(--xt-line); border-radius: 20px; padding: 16px; margin-bottom: 14px; box-shadow: 0 2px 10px rgba(42, 54, 70, .06); }
.card h2 { margin: 0 0 10px; font-family: var(--display); font-weight: 600; font-size: 18px; color: var(--ink); }
.callout { border-color: var(--xt-cinnabar); }
.hint { color: var(--muted); font-size: 14px; margin: 6px 0; }
.center { text-align: center; }

.btn {
  border: 2px solid var(--xt-line); background: var(--xt-paper); color: var(--ink);
  border-radius: 999px; padding: 10px 18px; font-family: var(--display); font-weight: 600; min-height: 44px;
  transition: background .15s, transform .12s, box-shadow .12s;
}
.btn.primary { background: var(--xt-cinnabar); border-color: var(--xt-cinnabar); color: #fff; box-shadow: 0 4px 0 var(--xt-cinnabar-dark); }
.btn.primary:hover { background: var(--xt-cinnabar-dark); }
.btn.primary:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--xt-cinnabar-dark); }
.btn.danger { background: var(--xt-paper); border-color: var(--xt-cinnabar); color: var(--xt-cinnabar-dark); }
.btn.ghost { background: transparent; border-color: currentColor; }
.btn.small { padding: 4px 14px; min-height: 34px; font-size: 14px; }
.btn.active, .chip-btn.active, .tab.active { background: var(--xt-cinnabar); border-color: var(--xt-cinnabar); color: #fff; }
.icon { background: none; border: 0; padding: 8px; }

.toolbar { display: flex; gap: 10px; margin: 14px 0; }
.toolbar .btn { flex: 1; }
.toolbar.three { flex-wrap: wrap; }
.toolbar.three .btn { flex: 1 1 30%; }

.reminders .reminder { display: flex; align-items: center; gap: 10px; padding: 6px 0; }
.reminders .reminder span:nth-child(2) { flex: 1; }
.badge { background: var(--xt-sunshine); color: var(--ink); border-radius: 6px; padding: 2px 8px; font-size: 13px; font-weight: 700; white-space: nowrap; }

.warnings { margin: 12px 0 0; padding-left: 20px; color: var(--xt-cinnabar-dark); font-size: 14px; }
.warnings li { margin: 4px 0; }
.alert { margin-top: 12px; padding: 12px; border-radius: 14px; background: var(--xt-sunshine-soft); border-left: 4px solid var(--xt-cinnabar); font-size: 14px; }
.alert-card { border-color: var(--xt-cinnabar); }

.book-meta { color: var(--muted); font-size: 13px; }
.progress { height: 4px; background: var(--line); border-radius: 2px; margin: 8px 0 4px; }
.progress .bar { height: 100%; background: var(--xt-teal); border-radius: 2px; }


.form .field, .card .field { display: flex; flex-direction: column; gap: 4px; margin: 12px 0; }
.field label { font-size: 14px; color: var(--muted); }
.field input, .field select, .rx input { border: 2px solid var(--line); border-radius: 12px; padding: 10px; min-height: 44px; background: #fff; width: 100%; }
.field input:focus, .rx input:focus, .field select:focus { outline: 2px solid var(--xt-teal); border-color: var(--xt-teal); }
.rx { width: 100%; border-collapse: collapse; margin-top: 8px; table-layout: fixed; }
.rx th:first-child { width: 48px; white-space: nowrap; }
.rx input { padding: 10px 6px; min-width: 0; }
.rx th { font-size: 13px; color: var(--muted); font-weight: 600; text-align: left; padding: 4px; }
.rx td { padding: 4px; }
.check { display: flex; gap: 10px; align-items: flex-start; margin: 12px 0; }
.check input { width: 22px; height: 22px; margin-top: 1px; accent-color: var(--xt-cinnabar); }
.check small { display: block; color: var(--muted); font-size: 13px; }

table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th { text-align: left; color: var(--muted); font-weight: 600; border-bottom: 2px solid var(--line); padding: 6px 4px; }
table.data td { border-bottom: 1px solid var(--line); padding: 6px 4px; }
table.data td.bad { color: var(--xt-cinnabar-dark); font-weight: 700; }
.card { overflow-x: auto; }

.tabs { display: flex; gap: 8px; margin: 10px 0; }
.tab { flex: 1; border: 2px solid var(--xt-line); background: var(--xt-paper); border-radius: 999px; font-family: var(--display); padding: 10px; font-weight: 600; }
.pal-row { display: flex; gap: 8px; flex-wrap: wrap; }
.pal-sample { flex: 1; min-width: 96px; border: 2px solid var(--line); border-radius: 10px; padding: 14px 8px; background: var(--bg); color: var(--fg); display: flex; flex-direction: column; gap: 4px; }
.pal-sample small { opacity: .8; font-size: 12px; }
.size-list { display: flex; flex-direction: column; gap: 6px; }
.size-sample { text-align: left; border: 2px solid var(--line); border-radius: 8px; padding: 8px 10px; background: var(--bg); color: var(--fg); line-height: 1.5; }
.pal-sample.active, .size-sample.active { border-color: var(--xt-cinnabar); box-shadow: 0 0 0 2px var(--xt-cinnabar); }
.danger-zone { border: 2px dashed var(--xt-cinnabar); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.chip-btn { border: 2px solid var(--xt-line); background: var(--xt-paper); border-radius: 999px; padding: 8px 14px; }
.steps { padding-left: 22px; margin: 6px 0; }
.steps li { margin: 6px 0; }

.amsler-wrap { background: #fff; border: 2px solid var(--xt-line); border-radius: 20px; padding: 12px; display: grid; place-items: center; }
.amsler { width: min(100%, 72vh); height: auto; aspect-ratio: 1; }

/* ---------- 提示与对话框 ---------- */
.toast {
  position: fixed; left: 50%; bottom: calc(var(--safe-bottom) + 24px); transform: translateX(-50%);
  z-index: 100; max-width: min(92vw, 560px); display: flex; gap: 12px; align-items: center;
  background: var(--ink); color: #fff; padding: 12px 16px; border-radius: 14px; box-shadow: 0 6px 20px rgba(0, 0, 0, .25);
}
.toast.error { background: var(--xt-cinnabar-dark); }
.toast .btn { border-color: #fff; background: #fff; color: var(--ink); box-shadow: none; }
.modal-back { position: fixed; inset: 0; z-index: 90; background: rgba(42, 54, 70, .55); display: grid; place-items: center; padding: 16px; }
.modal { background: var(--xt-paper); color: var(--ink); border-radius: 20px; width: min(100%, 520px); max-height: 86vh; overflow: auto; padding: 18px; }
.modal h3 { margin: 0 0 10px; font-family: var(--display); font-weight: 600; color: var(--ink); }
.modal-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; margin-top: 16px; }
.toc { display: flex; flex-direction: column; max-height: 60vh; overflow: auto; }
.toc-item { text-align: left; background: none; border: 0; border-bottom: 1px solid var(--line); padding: 12px; }
.toc-item.current { color: var(--xt-cinnabar); font-weight: 700; }
.aa .row { display: flex; align-items: center; gap: 10px; margin: 12px 0; }
.aa .row > span:first-child { min-width: 110px; }
.aa input[type=range] { flex: 1; accent-color: var(--xt-cinnabar); }
.note-body { white-space: pre-wrap; line-height: 1.7; }
.loading { display: grid; place-items: center; height: 100vh; color: var(--muted); }

/* ---------- 阅读页 ---------- */
.pal-paper { --bg: #F4ECD8; --fg: #2A241C; }
.pal-dim { --bg: #C0B6A1; --fg: #0E0B07; }
.pal-dark { --bg: #1E1E1E; --fg: #E3CFAE; }

.reader { position: fixed; inset: 0; background: var(--bg); color: var(--fg); }
/* 正文视口夹在顶部按钮带与底部状态栏之间，文字永远不会被遮住；翻页步长 = 视口高度 − 一行 */
.page {
  position: absolute; left: 0; right: 0; overflow-y: auto; overscroll-behavior: contain;
  top: calc(var(--safe-top) + 52px); bottom: calc(var(--safe-bottom) + 30px);
}
.content { max-width: 40em; margin: 0 auto; padding: 0 max(22px, 5vw); transition: opacity .3s ease; word-break: break-word; }
.content.narrow { max-width: 24em; }
.content.fading { opacity: .2; transition: none; }
.content p { margin: 0 0 .8em; text-align: justify; }
.content.txt p { text-indent: 2em; }
.content h1, .content h2, .content h3 { line-height: 1.35; margin: 1em 0 .7em; font-size: 1.25em; }
.content img, .content svg { max-width: 100%; height: auto; display: block; margin: .6em auto; }
.pal-dark .content img { filter: brightness(.85); }
.content a { color: inherit; }
.content [data-chapter] { text-decoration: underline dotted; cursor: pointer; }
.content [data-noteref] { font-size: .8em; vertical-align: super; padding: 0 .2em; }
.content table { border-collapse: collapse; max-width: 100%; }
.content td, .content th { border: 1px solid currentColor; padding: .2em .4em; }
.content pre { white-space: pre-wrap; }
.content::after { content: ''; display: block; height: 30vh; }

.dim { position: fixed; inset: 0; background: #000; opacity: 0; pointer-events: none; transition: opacity 1.5s; z-index: 5; }
.warm { position: fixed; inset: 0; background: rgb(255, 150, 60); mix-blend-mode: multiply; opacity: 0; pointer-events: none; transition: opacity 3s; z-index: 6; }

.glasses-btn {
  position: fixed; top: calc(var(--safe-top) + 8px); right: 10px; z-index: 30;
  display: flex; align-items: center; gap: 6px; border: 0; border-radius: 999px;
  padding: 6px 12px; background: var(--xt-cinnabar); color: #fff; font-family: var(--display); font-weight: 600; font-size: 14px;
  box-shadow: 0 3px 0 var(--xt-cinnabar-dark);
}
.glasses-btn.off { background: var(--ink); box-shadow: 0 3px 0 #18202B; }
.glasses-btn .gicon { font-size: 15px; letter-spacing: -2px; }
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 20;
  display: flex; align-items: center; gap: 4px;
  padding: calc(var(--safe-top) + 6px) 110px 6px 6px;
  background: var(--bg); color: var(--fg); border-bottom: 1px solid color-mix(in srgb, var(--fg) 20%, transparent);
}
.topbar .icon { color: var(--fg); font-weight: 600; white-space: nowrap; }
.tb-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; opacity: .8; }
.bottombar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 4;
  display: flex; justify-content: space-between; gap: 12px;
  padding: 6px 16px calc(var(--safe-bottom) + 8px); font-size: 12px;
  background: var(--bg); color: color-mix(in srgb, var(--fg) 65%, var(--bg)); pointer-events: none;
}
.banner {
  position: fixed; top: calc(var(--safe-top) + 52px); left: 10px; right: 10px; z-index: 25;
  background: var(--xt-sunshine); color: var(--ink); border-radius: 14px; padding: 10px 14px; font-weight: 600; font-size: 14px;
}
.overlay-host .break {
  position: fixed; inset: 0; z-index: 50; background: var(--ink); color: #fff;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  padding: 24px; text-align: center;
}
.break-title { font-family: var(--display); font-size: 28px; font-weight: 600; }
.break .count { font-size: 64px; font-weight: 300; font-variant-numeric: tabular-nums; }
.break .steps { text-align: left; font-size: 18px; }
.break .hint { color: #C9D3E3; }
.break .btn { min-width: 220px; }
.break .btn.ghost { color: #fff; }


/* ---------- 一级页面：底部标签栏 ---------- */
.with-tabs main { padding-bottom: calc(var(--safe-bottom) + 88px); }
.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 15;
  display: grid; grid-template-columns: repeat(3, 1fr);
  padding: 6px 0 calc(var(--safe-bottom) + 6px);
  background: var(--xt-paper); border-top: 2px solid var(--xt-line);
}
.tab-item { background: none; border: 0; display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 4px 0; color: var(--muted); font-family: var(--display); font-weight: 600; font-size: 13px; }
.tab-item.active { color: var(--xt-cinnabar); }
.tab-icon { position: relative; display: grid; place-items: center; height: 26px; }
.ico { width: 24px; height: 24px; display: block; }
.icon-btn .ico { width: 20px; height: 20px; margin: auto; }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: var(--xt-cinnabar); }
.tab-icon .dot { position: absolute; top: -2px; right: -8px; }

/* ---------- 书架 ---------- */
.shelf-head {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: calc(var(--safe-top) + 12px) 16px 10px; background: var(--xt-mint);
}
.shelf-head h1 { margin: 0; font-family: var(--display); font-weight: 600; font-size: 22px; }
.week { color: var(--muted); font-size: 14px; }
.week b { font-family: var(--display); font-size: 26px; color: var(--ink); margin: 0 2px; }
.head-actions { display: flex; align-items: center; gap: 6px; }
.icon-btn { background: var(--xt-paper); border: 2px solid var(--xt-line); border-radius: 50%; width: 42px; height: 42px; padding: 0; display: grid; place-items: center; color: var(--ink); }
.icon-btn.add { background: var(--xt-cinnabar); border-color: var(--xt-cinnabar); color: #fff; box-shadow: 0 3px 0 var(--xt-cinnabar-dark); }
.shelf-search { width: 100%; border: 2px solid var(--xt-line); border-radius: 999px; padding: 10px 16px; margin-bottom: 12px; background: var(--xt-paper); }

.cover { width: 56px; height: 75px; flex: none; border-radius: 8px; object-fit: cover; box-shadow: 0 2px 6px rgba(42, 54, 70, .18); }
.cover.big { width: 84px; height: 112px; }
.cover.gen { display: flex; flex-direction: column; justify-content: space-between; padding: 6px 5px; color: #fff; overflow: hidden; }
.cover-title { font-size: 11px; font-weight: 700; line-height: 1.25; word-break: break-all; }
.cover.big .cover-title { font-size: 14px; }
.cover-fmt { font-size: 9px; opacity: .75; letter-spacing: .5px; }

.continue { display: flex; gap: 16px; align-items: center; background: var(--xt-paper); border: 2px solid var(--xt-line); border-radius: 20px; padding: 16px; margin-bottom: 16px; box-shadow: 0 2px 10px rgba(42, 54, 70, .06); cursor: pointer; }
.continue-info { flex: 1; min-width: 0; }
.continue-info .label { font-size: 12px; color: var(--xt-cinnabar); font-weight: 700; }
.continue-title { font-family: var(--display); font-weight: 600; font-size: 18px; margin: 2px 0 8px; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.continue .btn { margin-top: 8px; }

.books { background: var(--xt-paper); border: 2px solid var(--xt-line); border-radius: 20px; overflow: hidden; }
.book { display: flex; align-items: center; border-bottom: 1px solid var(--xt-line); }
.book:last-child { border-bottom: 0; }
.book-main { flex: 1; min-width: 0; display: flex; align-items: center; gap: 14px; background: none; border: 0; text-align: left; padding: 12px 14px; }
.book-info { flex: 1; min-width: 0; }
.book-title { font-size: 17px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.book-meta { color: var(--muted); font-size: 13px; margin-top: 4px; }
.more { font-size: 22px; padding: 0 16px; color: var(--muted); align-self: stretch; }
.empty-shelf { text-align: center; padding: 48px 16px; }
.empty-art { font-size: 56px; }
.empty-shelf p { margin: 10px 0; }

/* ---------- 记录 ---------- */
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; text-align: center; }
.tile-value { font-family: var(--display); font-weight: 600; font-size: 24px; color: var(--ink); }
.tile-value small { font-size: 12px; font-weight: 400; margin-left: 2px; color: var(--muted); }
.tile .label { font-size: 12px; color: var(--muted); }
.bars { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; height: 168px; align-items: end; }
.bar-col { display: flex; flex-direction: column; align-items: center; height: 100%; }
.bar-val { font-size: 11px; color: var(--muted); height: 16px; }
.bar-stack { flex: 1; width: 60%; display: flex; flex-direction: column; justify-content: flex-end; background: var(--xt-mint); border-radius: 8px; overflow: hidden; }
.seg.on { background: var(--xt-cinnabar); }
.seg.off { background: var(--xt-teal); }
.bar-day { font-size: 12px; color: var(--muted); margin-top: 4px; }
.legend { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); margin-top: 10px; }
.legend .key { width: 10px; height: 10px; border-radius: 3px; margin-left: 8px; }
.legend .key:first-child { margin-left: 0; }
.legend .key.on { background: var(--xt-cinnabar); }
.legend .key.off { background: var(--xt-teal); }

/* ---------- 我的 ---------- */
.me-head { display: flex; gap: 16px; align-items: center; padding: calc(var(--safe-top) + 20px) 4px 16px; }
.avatar { width: 64px; height: 64px; border-radius: 33%; flex: none; display: grid; place-items: center; background: var(--xt-cinnabar); color: var(--xt-paper); font-family: var(--serif); font-size: 30px; font-weight: 700; box-shadow: 0 4px 0 var(--xt-cinnabar-dark); }
.avatar.big { width: 84px; height: 84px; font-size: 40px; margin: 0 auto; }
.me-name { font-family: var(--display); font-weight: 600; font-size: 21px; display: flex; align-items: center; gap: 8px; }
.mode-pill { font-size: 12px; border: 2px solid var(--xt-cinnabar); color: var(--xt-cinnabar); border-radius: 999px; padding: 0 8px; }
.mode-pill.off { border-color: var(--ink); color: var(--ink); }
.me-sub { color: var(--muted); font-size: 14px; margin-top: 2px; }
.counters { display: grid; grid-template-columns: repeat(3, 1fr); text-align: center; }
.counters b { display: block; font-family: var(--display); font-size: 22px; color: var(--ink); }
.counters span { font-size: 12px; color: var(--muted); }
.counters > div + div { border-left: 1px solid var(--xt-line); }
.menu { background: var(--xt-paper); border: 2px solid var(--xt-line); border-radius: 20px; overflow: hidden; margin-bottom: 14px; }
.menu-row { width: 100%; display: flex; align-items: center; gap: 12px; padding: 14px 16px; background: none; border: 0; border-bottom: 1px solid var(--xt-line); text-align: left; min-height: 56px; }
.menu-row:last-child { border-bottom: 0; }
.menu-icon { width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center; color: #fff; font-size: 15px; font-weight: 700; flex: none; }
.menu-label { font-size: 17px; font-weight: 600; }
.menu-sub { flex: 1; text-align: right; color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chev { color: var(--muted); font-size: 22px; }

/* ---------- 首次使用 ---------- */
.welcome-hero { text-align: center; padding: calc(var(--safe-top) + 28px) 8px 12px; }
.welcome-hero h1 { font-family: var(--display); font-weight: 600; font-size: 26px; margin: 18px 0 8px; }
.welcome-hero p { color: var(--muted); margin: 0 auto; max-width: 30em; }
.step-head { display: flex; align-items: center; gap: 10px; }
.step-head h2 { margin: 0; }
.step-no { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--xt-cinnabar); color: #fff; font-family: var(--display); font-weight: 600; flex: none; }
.step.done .step-no { background: var(--xt-teal); }
.step .paste { margin: 6px 0 10px; }
.btn.wide { width: 100%; margin-top: 8px; }

@media (max-width: 380px) {
  .tiles { grid-template-columns: repeat(2, 1fr); row-gap: 14px; }
}