/* 照 Claude Design 画布 B 版（一篇一屏）：深色卡片 #16191D、琥珀 #F6B24E、正文 Source Serif 4、界面 Inter + 苹方 */
:root {
  --ink: #16191D; --ink-2: #3B424B; --mute: #5A626D; --line: #EEF0F3; --line-2: #D5D9DF; --bg-soft: #F5F6F8;
  --d-text: #F3F4F6; --d-sub: #B7BDC6; --d-why: #D5D9DF; --d-faint: #8E959F; --d-line: #3A4048;
  --amber: #F6B24E; --amber-ink: #8A4508; --blue: #1F4FD8; --cite: #DCE6FB;
  --sans: Inter, -apple-system, 'PingFang SC', system-ui, sans-serif;
  --serif: 'Source Serif 4', Georgia, 'Songti SC', serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--ink); }
body { font-family: var(--sans); color: var(--ink); -webkit-text-size-adjust: 100%; }
button { font-family: inherit; cursor: pointer; }
a { color: var(--blue); text-decoration: none; }
[hidden] { display: none !important; }
#app { height: 100dvh; max-width: 560px; margin: 0 auto; position: relative; overflow: hidden; }

/* —— 卡片：一篇一屏 —— */
.card { height: 100%; background: var(--ink); color: var(--d-text); display: flex; flex-direction: column; gap: 18px;
  padding: calc(18px + env(safe-area-inset-top, 0px)) 20px calc(24px + env(safe-area-inset-bottom, 0px)); }
.card-top { display: flex; flex-direction: column; gap: 12px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.card-date { font-size: 14px; color: var(--d-sub); }
.pill-btn { height: 44px; padding: 0 12px; border: 1px solid var(--d-line); background: transparent; border-radius: 22px; font-size: 13px; font-weight: 500; color: var(--d-text); }
.segs { display: grid; gap: 6px; }
.seg { height: 4px; border-radius: 2px; background: var(--d-line); }
.seg.done { background: var(--d-faint); } .seg.cur { background: #FFFFFF; }
.card-main { flex: 1; min-height: 0; display: flex; flex-direction: column; justify-content: center; gap: 18px; overflow-y: auto; }
.card-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.badge { font-size: 12px; font-weight: 600; color: var(--ink); background: var(--amber); padding: 4px 9px; border-radius: 6px; }
.badge.ghost { color: var(--d-text); background: var(--d-line); }
.card-src { font-size: 13px; color: var(--d-sub); }
.card-title { margin: 0; font-family: var(--serif); font-size: 30px; line-height: 1.22; font-weight: 600; color: #FFFFFF; overflow-wrap: anywhere; }
.card-why { margin: 0; font-size: 16px; line-height: 1.6; color: var(--d-why); }
.card-where { font-size: 14px; line-height: 1.5; color: var(--amber); }
.card-pos { font-size: 13px; color: var(--d-faint); }
.card-foot { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.big-btn { height: 56px; border-radius: 16px; font-size: 16px; font-weight: 600; display: flex; align-items: center; justify-content: center; }
.big-btn.ghost { border: 1px solid var(--d-line); background: transparent; color: var(--d-text); }
.big-btn.solid { border: none; background: #FFFFFF; color: var(--ink); }
.card-msg { margin: 0; font-size: 16px; line-height: 1.6; color: var(--d-why); }

/* —— 阅读页 —— */
.reader { height: 100%; background: #FFFFFF; display: flex; flex-direction: column; position: relative; }
.r-head { background: var(--ink); color: var(--d-text); padding: calc(6px + env(safe-area-inset-top, 0px)) 8px 12px 4px; display: flex; flex-direction: column; gap: 8px; }
.r-bar { display: flex; align-items: center; gap: 4px; }
.icon-btn { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; border: none; background: transparent; color: inherit; flex: none; }
.r-where { flex: 1; min-width: 0; font-size: 13px; color: var(--d-sub); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.r-orig { height: 44px; padding: 0 10px; display: flex; align-items: center; font-size: 13px; color: #9DB8FF; flex: none; }
.chips { display: flex; gap: 8px; overflow-x: auto; padding: 0 12px 2px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip { flex: none; height: 36px; max-width: 240px; padding: 0 12px; border-radius: 18px; border: 1px solid var(--d-line); background: transparent; color: var(--d-why); font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chip.rec { border: none; background: var(--amber); color: var(--ink); font-weight: 600; }
.r-body { flex: 1; min-height: 0; overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 20px 22px 120px; }
.r-title { margin: 0 0 8px; font-family: var(--serif); font-size: 26px; line-height: 1.25; font-weight: 600; overflow-wrap: anywhere; }
.r-why { margin: 0 0 20px; font-size: 14px; line-height: 1.55; color: var(--ink-2); background: var(--bg-soft); border-radius: 10px; padding: 10px 12px; }
.r-rec-label { display: block; margin: 28px 0 8px; font-size: 12px; font-weight: 600; color: var(--amber-ink); line-height: 1.5; }
.blk { scroll-margin-top: 12px; border-radius: 4px; transition: background-color .6s; }
.blk.h { margin: 28px 0 12px; font-family: var(--serif); font-size: 24px; line-height: 1.25; font-weight: 600; }
.r-rec-label + .blk.h { margin-top: 0; }
.blk.p, .blk.li { margin: 0 0 14px; font-family: var(--serif); font-size: 17px; line-height: 1.65; overflow-wrap: anywhere; }
.blk.li { padding-left: 18px; position: relative; }
.blk.li::before { content: ''; position: absolute; left: 4px; top: 0.75em; width: 5px; height: 5px; border-radius: 50%; background: var(--mute); }
.blk.code { margin: 0 0 14px; padding: 12px; background: var(--bg-soft); border-radius: 8px; font: 13px/1.5 ui-monospace, Menlo, monospace; overflow-x: auto; white-space: pre; }
.tbl { margin: 0 0 14px; overflow-x: auto; }
.tbl table { border-collapse: collapse; font-size: 14px; line-height: 1.45; }
.tbl td { border: 1px solid var(--line-2); padding: 6px 8px; vertical-align: top; min-width: 90px; }
.tbl tr:first-child td { font-weight: 600; background: var(--bg-soft); }
.blk.hit { background: var(--cite); box-shadow: 0 0 0 4px var(--cite); }
.r-empty { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; font-size: 15px; line-height: 1.6; color: var(--ink-2); }
.dark-btn { height: 48px; padding: 0 18px; border: none; border-radius: 14px; background: var(--ink); color: #FFFFFF; font-size: 15px; font-weight: 600; display: inline-flex; align-items: center; justify-content: center; }
.r-foot { padding: 10px 16px calc(18px + env(safe-area-inset-bottom, 0px)); border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; background: #FFFFFF; }
.line-btn { height: 48px; border: 1px solid var(--line-2); border-radius: 14px; background: #FFFFFF; font-size: 15px; font-weight: 600; color: var(--ink); }
.line-btn:disabled { color: #8E959F; }
.r-foot .dark-btn { width: 100%; }
.sel-ask { position: absolute; left: 50%; transform: translateX(-50%); bottom: calc(92px + env(safe-area-inset-bottom, 0px)); height: 44px; padding: 0 18px; border: none; border-radius: 22px; background: var(--ink); color: #FFFFFF; font-size: 14px; font-weight: 600; display: flex; align-items: center; gap: 8px; box-shadow: 0 6px 20px rgba(22,25,29,.25); }

/* —— 底部面板：问这篇、清单 —— */
.scrim { position: absolute; inset: 0; background: rgba(22,25,29,.35); }
.sheet { position: absolute; left: 0; right: 0; bottom: 0; max-height: 78%; background: #FFFFFF; color: var(--ink); border-radius: 18px 18px 0 0; box-shadow: 0 -8px 28px rgba(22,25,29,.16);
  display: flex; flex-direction: column; padding: 10px 18px calc(18px + env(safe-area-inset-bottom, 0px)); gap: 12px; }
.sheet-head { display: flex; align-items: center; justify-content: space-between; }
.sheet-title { font-size: 14px; font-weight: 600; }
.sheet-scroll { overflow-y: auto; display: flex; flex-direction: column; gap: 12px; min-height: 0; }
.q { align-self: flex-end; max-width: 85%; background: var(--ink); color: #FFFFFF; font-size: 14px; line-height: 1.5; padding: 10px 12px; border-radius: 14px 14px 4px 14px; overflow-wrap: anywhere; }
.q-quote { display: block; margin-bottom: 6px; padding-left: 8px; border-left: 2px solid var(--d-faint); color: var(--d-why); font-size: 13px; }
.a { display: flex; flex-direction: column; gap: 8px; background: var(--bg-soft); border-radius: 14px 14px 14px 4px; padding: 12px; font-size: 14px; line-height: 1.55; overflow-wrap: anywhere; }
.a.wait { color: var(--mute); }
.cite-btn { align-self: flex-start; min-height: 36px; padding: 0 10px; border: 1px solid #C9D6F8; border-radius: 8px; background: #FFFFFF; color: var(--blue); font-size: 13px; font-weight: 500; }
.ask-quote { font-size: 13px; line-height: 1.5; color: var(--ink-2); background: var(--bg-soft); border-radius: 8px; padding: 8px 10px; display: flex; gap: 8px; align-items: flex-start; }
.ask-quote span { flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.ask-quote button { border: none; background: none; color: var(--mute); font-size: 13px; padding: 0 2px; min-height: 24px; }
.ask-row { display: flex; gap: 10px; }
.ask-row input { flex: 1; min-width: 0; height: 44px; border: 1px solid var(--line-2); border-radius: 22px; padding: 0 16px; font: 16px var(--sans); background: var(--bg-soft); color: var(--ink); }
.send { height: 44px; padding: 0 16px; border: none; border-radius: 22px; background: var(--ink); color: #FFFFFF; font-size: 14px; font-weight: 600; flex: none; }
.send:disabled { opacity: .5; }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.row { display: flex; align-items: center; gap: 10px; min-height: 56px; padding: 8px 0; border: none; border-bottom: 1px solid var(--line); background: none; text-align: left; width: 100%; color: var(--ink); }
.row-main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.row-title { font-family: var(--serif); font-size: 15px; line-height: 1.35; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.row-sub { font-size: 12px; color: var(--mute); }
.row-st { font-size: 12px; color: var(--mute); flex: none; }
.row-st.read { color: #2C7A4B; }
.row.cur .row-title { font-weight: 600; }
.sec-label { font-size: 13px; font-weight: 600; color: var(--mute); padding-top: 6px; }
.toast { position: absolute; left: 16px; right: 16px; top: calc(12px + env(safe-area-inset-top, 0px)); background: var(--ink); color: #FFFFFF; font-size: 14px; padding: 12px 14px; border-radius: 12px; box-shadow: 0 6px 20px rgba(0,0,0,.25); z-index: 9; }