:root {
  color-scheme: dark;
  --bg: #111315;
  --panel: #191c1f;
  --panel-deep: #151719;
  --border: #343a40;
  --text: #f4f1ea;
  --muted: #a5acb3;
  --accent: #d7f26a;
  --paper: #f2eee4;
  --ink: #222522;
  --danger: #ff958d;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .45; }
a { color: inherit; }
.app-shell { min-height: 100vh; padding-bottom: 126px; }
.topbar { min-height: 88px; padding: 20px 28px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.brand { color: var(--text); text-decoration: none; font-size: 22px; font-weight: 750; letter-spacing: -.045em; }
.brand span { color: var(--accent); font-weight: 500; }
.topbar p { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.topbar nav { display: flex; align-items: center; gap: 18px; }
.topbar nav a { display: inline-flex; min-height: 44px; align-items: center; color: var(--muted); text-underline-offset: 4px; white-space: nowrap; }
.topbar nav a:hover { color: var(--accent); }
.topbar nav .settings-shortcut, .settings-return { display: none; }
.notice { max-width: 1100px; margin: 16px auto 0; padding: 10px 14px; border-left: 1px solid var(--accent); background: #d7f26a15; color: var(--text); }
.notice.error { border-color: var(--danger); background: #ff958d15; color: var(--danger); }
.workspace { display: grid; grid-template-columns: 250px minmax(360px, 1fr) 260px; min-height: calc(100vh - 214px); }
.sidebar, .settings { background: var(--panel); }
.sidebar { border-right: 1px solid var(--border); }
.settings { border-left: 1px solid var(--border); padding: 25px 20px; scroll-margin-top: 16px; }
.sidebar-section { padding: 25px 18px; border-bottom: 1px solid var(--border); }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-bottom: 16px; }
.section-heading h2 { margin: 0; font-size: 15px; letter-spacing: -.015em; }
.section-heading span, .helper, .empty-small { color: var(--muted); font-size: 12px; }
.helper { margin: 10px 0 0; line-height: 1.5; }
.import-button, .secondary-button { width: 100%; display: inline-block; border: 1px solid var(--accent); border-radius: 7px; padding: 9px 12px; background: var(--accent); color: #172000; text-align: center; font-weight: 700; }
.import-button { min-height: 44px; }
.import-button:hover, .secondary-button:hover { background: #e5ff88; }
:is(button, a, input, select, summary):focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.reader :is(button, a):focus-visible { outline-color: #44650a; }
.book-list, .chapter-list { display: grid; gap: 4px; margin-top: 15px; }
.book-row { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 3px; }
.book-select, .chapter-select { width: 100%; min-height: 44px; border: 0; border-radius: 6px; padding: 9px 10px; background: transparent; color: var(--text); text-align: left; }
.book-select:hover, .chapter-select:hover { background: #ffffff0c; }
.book-select.active, .chapter-select.active { background: #d7f26a19; color: var(--accent); }
.book-select strong, .book-select small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.book-select strong { font-size: 13px; font-weight: 650; }
.book-select small { color: var(--muted); font-size: 11px; }
.delete-button { min-height: 44px; border: 0; background: transparent; color: var(--muted); font-size: 12px; padding: 8px; }
.delete-button:hover { color: var(--danger); }
.chapter-select { font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.reader { min-width: 0; background: var(--paper); color: var(--ink); padding: clamp(32px, 5vw, 82px) clamp(24px, 6vw, 96px) 100px; scroll-margin-top: 16px; }
.reader > div { max-width: 760px; margin: 0 auto; }
.empty-reader { padding-top: clamp(80px, 12vh, 180px); }
.empty-reader h1 { margin: 0; font-size: clamp(40px, 5vw, 70px); letter-spacing: -.04em; line-height: 1.08; }
.empty-reader > p { max-width: 450px; margin: 20px 0 0; color: #636a63; line-height: 1.8; }
.reader-import { min-height: 44px; margin-top: 24px; border: 0; border-radius: 7px; padding: 10px 20px; background: var(--ink); color: var(--paper); font-weight: 700; }
.reader-import:hover { background: #383d36; }
.reader-meta { display: flex; justify-content: space-between; gap: 12px; color: #697069; font-size: 12px; }
.text-button { border: 0; padding: 0; background: transparent; color: #44650a; text-decoration: underline; text-underline-offset: 3px; }
#reader-book-title { margin: 14px 0 26px; font-size: clamp(34px, 4vw, 58px); letter-spacing: -.055em; line-height: 1.12; overflow-wrap: anywhere; }
.chapter-meta { display: flex; gap: 16px; border-top: 1px solid #d3d1c7; padding-top: 18px; color: #757c73; font-size: 12px; }
#reader-chapter-title { margin: 25px 0 30px; font-size: 25px; line-height: 1.3; }
.reader-text { font: 19px/2 ui-serif, Georgia, "Songti SC", "Noto Serif CJK SC", serif; white-space: pre-wrap; overflow-wrap: anywhere; }
.reader-text p { margin: 0 0 1.2em; }
.field { display: grid; gap: 7px; margin-top: 18px; }
.field label { color: var(--muted); font-size: 12px; }
.field input:not([type="range"]), .field select { width: 100%; min-height: 44px; border: 1px solid var(--border); border-radius: 6px; padding: 9px 10px; background: var(--panel-deep); color: var(--text); outline: none; }
.field input:focus, .field select:focus { border-color: var(--accent); box-shadow: 0 0 0 2px #d7f26a30; }
.field input[type="range"] { width: 100%; accent-color: var(--accent); }
.field output { float: right; color: var(--accent); }
.secondary-button { margin-top: 16px; }
.clear-key { min-height: 36px; margin-top: 6px; border: 0; padding: 4px 0; background: transparent; color: var(--muted); font-size: 12px; text-decoration: underline; text-underline-offset: 3px; }
.clear-key:not(:disabled):hover { color: var(--text); }
.advanced-settings { margin-top: 24px; border-top: 1px solid var(--border); padding-top: 16px; }
.advanced-settings summary { min-height: 44px; padding: 12px 0; cursor: pointer; color: var(--muted); font-size: 13px; }
.advanced-settings .field { margin-top: 14px; }
.settings-note { margin-top: 20px; }
.player-bar { position: fixed; z-index: 5; inset: auto 0 0; min-height: 126px; display: grid; grid-template-columns: minmax(180px, 260px) minmax(260px, 1fr) minmax(110px, 230px); align-items: center; gap: 22px; padding: 16px 26px; border-top: 1px solid var(--border); background: #151719f5; backdrop-filter: blur(15px); }
.player-book { display: grid; min-width: 0; }
.player-book strong, .player-book span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.player-label { color: var(--accent); font-size: 10px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.player-book strong { font-size: 14px; }
#player-chapter { color: var(--muted); font-size: 12px; }
.player-main { display: grid; justify-items: center; gap: 8px; }
.transport { display: flex; align-items: center; gap: 10px; }
.transport button { border: 1px solid var(--border); border-radius: 6px; padding: 5px 12px; background: transparent; color: var(--text); font-size: 12px; }
.transport .play-button { min-width: 68px; border-color: var(--accent); background: var(--accent); color: #172000; font-weight: 750; }
.player-main audio { width: min(520px, 100%); height: 32px; }
.player-state { color: var(--muted); font-size: 12px; text-align: right; }
@media (max-width: 1100px) { .workspace { grid-template-columns: 210px minmax(330px, 1fr); } .settings { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 22px; border-left: 0; border-top: 1px solid var(--border); } .settings .section-heading, .settings-note { grid-column: 1 / -1; } }
@media (max-width: 700px) { .app-shell { padding-bottom: calc(130px + env(safe-area-inset-bottom)); } .topbar { padding: 14px 16px; } .topbar nav .settings-shortcut, .settings-return { display: inline-flex; min-height: 44px; align-items: center; } .workspace { display: flex; flex-direction: column; } .sidebar { display: grid; grid-template-columns: 1fr 1fr; border-right: 0; } .sidebar-section { min-width: 0; padding: 16px; } .chapter-section { border-left: 1px solid var(--border); } .book-list, .chapter-list { max-height: 210px; overflow: auto; } .reader { min-height: 360px; padding: 35px 20px 60px; } .settings { display: block; padding: 18px; } .player-bar { min-height: 0; grid-template-columns: minmax(0, 1fr) auto; gap: 3px 10px; padding: 7px 16px calc(7px + env(safe-area-inset-bottom)); } .player-book { display: flex; grid-column: 1; grid-row: 1; align-items: baseline; gap: 8px; min-width: 0; } .player-label { display: none; } .player-book strong { min-width: 0; } #player-chapter { min-width: 0; font-size: 11px; } .player-state { grid-column: 2; grid-row: 1; font-size: 11px; text-align: right; } .player-main { grid-column: 1 / -1; grid-row: 2; gap: 3px; } .transport { gap: 7px; } .transport button { min-height: 44px; padding: 8px 12px; } .player-main audio { height: 32px; } }
@media (max-width: 560px) { .sidebar { display: block; } .chapter-section { border-left: 0; } .topbar nav { gap: 10px; font-size: 12px; } .reader-text { font-size: 17px; } }