:root {
  --canvas: #f6f4ef;
  --surface: #fffdf9;
  --ink: #17201e;
  --muted: #63706b;
  --rule: #d9d9d1;
  --accent: #0d6d58;
  --accent-soft: #dcefe9;
  --ai: #6949a4;
  --ai-soft: #eee8fb;
  --warning: #805d17;
  --warning-soft: #f8f0d9;
  --shadow: 0 12px 30px rgba(24, 36, 31, 0.07);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--canvas);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { min-width: 320px; background: var(--canvas); }
body { margin: 0; min-width: 320px; line-height: 1.55; }
button, input, select, textarea { font: inherit; }
a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid #ffb347; outline-offset: 3px; }

.shell { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.skip-link { position: fixed; z-index: 20; top: 0; left: 1rem; transform: translateY(-120%); padding: .55rem .8rem; background: #fff; border: 2px solid var(--ink); border-radius: 0 0 .4rem .4rem; }
.skip-link:focus { transform: translateY(0); }
.site-header { background: rgba(246, 244, 239, .92); border-bottom: 1px solid var(--rule); position: sticky; top: 0; z-index: 10; backdrop-filter: blur(10px); }
.header-content { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 35px; height: 35px; border-radius: 50%; color: #fff; background: var(--accent); font-family: Georgia, serif; font-size: 1.3rem; font-weight: 700; }
.brand strong, .brand small { display: block; line-height: 1.12; }
.brand small { margin-top: .15rem; color: var(--muted); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.header-note { margin: 0; color: var(--muted); font-size: .88rem; }
.page-shell { padding: clamp(2.5rem, 6vw, 5.5rem) 0 4rem; }
.intro { max-width: 755px; }
.eyebrow { margin: 0 0 .65rem; color: var(--accent); font-size: .75rem; font-weight: 750; letter-spacing: .12em; }
h1 { max-width: 700px; margin: 0; font-family: Georgia, "Noto Serif SC", serif; font-size: clamp(2.3rem, 6vw, 4.7rem); letter-spacing: -.055em; line-height: .99; font-weight: 600; }
.intro > p:last-child { margin: 1.35rem 0 0; color: var(--muted); font-size: clamp(1rem, 2vw, 1.15rem); max-width: 665px; }
.copyright-note { display: flex; gap: .75rem; align-items: flex-start; max-width: 780px; margin: 2.5rem 0 2rem; padding: .85rem 1rem; border-radius: .7rem; background: var(--warning-soft); color: #5a491f; }
.copyright-note span { font-size: 1.25rem; line-height: 1.35; }
.copyright-note p { margin: 0; font-size: .88rem; }
.filters { display: grid; grid-template-columns: minmax(220px, 1.6fr) repeat(4, minmax(130px, .7fr)); gap: .75rem; padding: .85rem; background: rgba(255, 253, 249, .72); border: 1px solid var(--rule); border-radius: .9rem; box-shadow: 0 4px 14px rgba(25, 38, 30, .025); }
.search-field, .select-field { min-height: 46px; display: flex; align-items: center; gap: .55rem; border: 1px solid var(--rule); border-radius: .55rem; background: #fff; padding: 0 .75rem; }
.search-field { color: var(--muted); }
.search-field input { min-width: 0; width: 100%; border: 0; background: transparent; color: var(--ink); outline: 0; }
.search-field input::placeholder { color: #84908a; }
.select-field { position: relative; gap: .35rem; color: var(--muted); font-size: .78rem; white-space: nowrap; }
.select-field select { min-width: 0; flex: 1; appearance: auto; border: 0; background: transparent; color: var(--ink); outline: 0; font-size: .9rem; }
.saved-views { display: grid; grid-template-columns: minmax(180px, 1fr) minmax(170px, .8fr) minmax(150px, .7fr) auto; gap: .75rem; align-items: end; margin-top: .85rem; padding: .9rem; border: 1px solid #c6ddd5; border-radius: .9rem; background: var(--accent-soft); }
.saved-views-copy .section-label { margin-bottom: .2rem; }
.saved-views-copy > p:last-child { margin: 0; color: #38564d; font-size: .78rem; }
.saved-view-select { min-height: 44px; background: #fff; }
.saved-view-name { display: flex; align-items: center; min-height: 44px; padding: 0 .7rem; border: 1px solid #a7c3b8; border-radius: .55rem; background: #fff; }
.saved-view-name input { min-width: 0; width: 100%; border: 0; outline: 0; background: transparent; }
.saved-view-actions, .form-actions { display: flex; flex-wrap: wrap; gap: .5rem; }
button { border: 1px solid var(--accent); border-radius: .48rem; padding: .47rem .7rem; color: #fff; background: var(--accent); cursor: pointer; font-weight: 700; font-size: .84rem; }
button:hover { background: #075844; }
button:disabled { cursor: not-allowed; opacity: .48; }
.button-secondary { color: #33433d; background: #fff; border-color: #a7c3b8; }
.button-secondary:hover { color: #17201e; background: #edf5f1; }
.danger-button { color: #8b2e2e; border-color: #d9a4a4; }
.danger-button:hover { color: #fff; background: #9f3131; border-color: #9f3131; }
.storage-notice { margin: .85rem 0 0; padding: .7rem .85rem; border: 1px solid #e0be68; border-radius: .6rem; color: #624e18; background: var(--warning-soft); font-size: .86rem; }
.result-summary { min-height: 1.6rem; margin: 1.4rem 0 .7rem; color: var(--muted); font-size: .9rem; }
.result-summary strong { color: var(--ink); }
.paper-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.paper-card { display: flex; flex-direction: column; min-height: 285px; padding: 1.35rem; border: 1px solid var(--rule); border-radius: .9rem; background: var(--surface); box-shadow: var(--shadow); transition: transform .18s ease, border-color .18s ease; }
.paper-card:hover { transform: translateY(-2px); border-color: #aabcb4; }
.card-topline { display: flex; justify-content: space-between; align-items: center; gap: .75rem; font-size: .78rem; color: var(--muted); }
.arxiv-id { color: var(--accent); font-weight: 700; letter-spacing: .03em; }
.card-title { margin: 1rem 0 .75rem; font-family: Georgia, "Noto Serif SC", serif; font-size: clamp(1.2rem, 2vw, 1.5rem); letter-spacing: -.025em; line-height: 1.18; }
.card-title a { text-decoration: none; }
.card-title a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: .17em; }
.authors { margin: 0; color: var(--muted); font-size: .84rem; overflow-wrap: anywhere; }
.tag-list { display: flex; flex-wrap: wrap; gap: .4rem; margin: auto 0 1rem; padding: 1.2rem 0 0; list-style: none; }
.tag { padding: .23rem .5rem; border-radius: 999px; background: #edf1ee; color: #43514b; font-size: .72rem; font-weight: 650; overflow-wrap: anywhere; }
.tag-personal { color: #215446; background: #dcefe9; }
.tag-remove { display: inline; margin-left: .25rem; padding: 0; border: 0; color: inherit; background: transparent; font-size: 1rem; line-height: 1; vertical-align: -.06em; }
.tag-remove:hover { color: #8b2e2e; background: transparent; }
.card-link { color: var(--accent); font-size: .87rem; font-weight: 750; text-decoration: none; }
.card-link:hover { text-decoration: underline; text-underline-offset: .2em; }
.card-footer { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: .75rem; margin-top: auto; }
.compact-control { display: grid; gap: .12rem; color: var(--muted); font-size: .71rem; font-weight: 700; }
.compact-control select { max-width: 136px; padding: .24rem .35rem; border: 1px solid #b5c3bd; border-radius: .38rem; color: var(--ink); background: #fff; }
.empty-state, .load-error { padding: 3.5rem 1.5rem; text-align: center; border: 1px dashed #aebbb4; border-radius: .85rem; color: var(--muted); background: rgba(255,255,255,.44); }
.empty-state h2, .load-error h2 { margin: 0 0 .4rem; color: var(--ink); font-family: Georgia, serif; font-size: 1.7rem; }
.empty-state p, .load-error p { margin: 0; }
.detail { max-width: 940px; }
.back-button { appearance: none; border: 0; padding: 0; color: var(--accent); background: transparent; cursor: pointer; font-weight: 750; }
.back-button:hover { text-decoration: underline; text-underline-offset: .2em; }
.detail-header { padding: 1.6rem 0 1.8rem; border-bottom: 1px solid var(--rule); }
.detail-kicker { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; color: var(--muted); font-size: .85rem; }
.detail-header h2 { max-width: 890px; margin: .9rem 0; font-family: Georgia, "Noto Serif SC", serif; font-size: clamp(2rem, 5vw, 3.6rem); letter-spacing: -.05em; line-height: 1.04; }
.detail-authors { margin: 0; color: var(--muted); overflow-wrap: anywhere; }
.detail-study-controls { display: flex; flex-wrap: wrap; align-items: end; gap: 1rem; margin-top: 1.1rem; }
.local-note, .empty-inline { margin: 0; color: var(--muted); font-size: .82rem; overflow-wrap: anywhere; }
.study-panel { display: grid; grid-template-columns: minmax(180px, .65fr) minmax(0, 1.35fr); gap: 1.25rem; margin-top: 1.35rem; padding: 1.25rem; border: 1px solid #b8d5cb; border-radius: .85rem; background: #f5fbf8; }
.study-panel h3 { margin: 0; font-family: Georgia, "Noto Serif SC", serif; font-size: 1.35rem; letter-spacing: -.02em; }
.study-panel .section-label { margin-bottom: .35rem; }
.personal-tag-list { margin: 0 0 .7rem; padding: 0; }
.inline-form { display: flex; flex-wrap: wrap; gap: .5rem; }
.inline-form input { min-width: min(100%, 180px); flex: 1; padding: .47rem .6rem; border: 1px solid #a7c3b8; border-radius: .48rem; background: #fff; }
.detail-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin-top: 1.35rem; }
.content-section { padding: 1.45rem; border: 1px solid var(--rule); border-radius: .85rem; background: var(--surface); min-width: 0; }
.content-section.ai-section { border-color: #d6c7f1; background: #fcfaff; }
.section-label { margin: 0 0 .5rem; color: var(--accent); font-size: .73rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.ai-section .section-label { color: var(--ai); }
.content-section h3 { margin: 0 0 1rem; font-family: Georgia, "Noto Serif SC", serif; font-size: 1.45rem; letter-spacing: -.02em; }
.content-section h4 { margin: 1.35rem 0 .5rem; font-size: .92rem; }
.content-section p { margin: 0; color: #3d4944; overflow-wrap: anywhere; }
.content-section dl { display: grid; grid-template-columns: minmax(98px, .45fr) 1fr; gap: .5rem .8rem; margin: 0; font-size: .89rem; }
.content-section dt { color: var(--muted); }
.content-section dd { min-width: 0; margin: 0; overflow-wrap: anywhere; }
.external-links { display: flex; flex-wrap: wrap; gap: .55rem; margin: 1.35rem 0 0; padding: 0; list-style: none; }
.external-links a { display: inline-flex; padding: .43rem .65rem; border: 1px solid #a7c3b8; border-radius: .45rem; color: #075844; font-size: .83rem; font-weight: 700; text-decoration: none; }
.external-links a:hover { background: var(--accent-soft); }
.highlights { display: grid; gap: .75rem; margin: 0; padding: 0; list-style: none; counter-reset: insight; }
.highlights li { position: relative; padding-left: 2.3rem; color: #3d4944; overflow-wrap: anywhere; counter-increment: insight; }
.highlights li::before { content: counter(insight); position: absolute; left: 0; top: .05rem; display: grid; place-items: center; width: 1.5rem; height: 1.5rem; border-radius: 50%; color: var(--ai); background: var(--ai-soft); font-size: .72rem; font-weight: 800; }
.review-control { display: flex; justify-content: space-between; align-items: end; gap: .8rem; margin-top: 1rem; padding: .75rem; border: 1px solid #dfd3f2; border-radius: .55rem; background: #fff; }
.review-control label { display: grid; gap: .2rem; color: #554b66; font-size: .78rem; font-weight: 700; }
.review-control select { padding: .28rem .35rem; border: 1px solid #c5b5e6; border-radius: .38rem; color: var(--ink); background: #fff; }
.review-control p { color: #665d76; font-size: .75rem; text-align: right; }
.disclosure { margin-top: 1.4rem; padding-top: 1rem; border-top: 1px solid #ded6ed; color: #554b66; font-size: .8rem; }
.disclosure p + p { margin-top: .55rem; }
.disclosure strong { color: #49346e; }
.notes-panel { align-items: start; margin-top: 1.35rem; }
.note-form { display: grid; gap: .45rem; }
.note-form label { color: #38564d; font-size: .82rem; font-weight: 700; }
.note-form textarea { width: 100%; resize: vertical; padding: .65rem; border: 1px solid #a7c3b8; border-radius: .55rem; color: var(--ink); background: #fff; line-height: 1.55; overflow-wrap: anywhere; }
.notes-list { display: grid; gap: .7rem; margin: 1.15rem 0 0; padding: 0; list-style: none; }
.notes-list > li { padding: .85rem; border: 1px solid #d0e0da; border-radius: .55rem; background: #fff; }
.notes-list p { margin: .45rem 0 0; color: #33433d; overflow-wrap: anywhere; }
.note-meta { display: flex; justify-content: space-between; gap: .75rem; color: var(--muted); font-size: .75rem; }
.text-button { padding: 0; border: 0; color: var(--accent); background: transparent; font-weight: 700; }
.text-button:hover { color: #075844; background: transparent; text-decoration: underline; text-underline-offset: .15em; }
.text-button + .text-button { margin-left: .55rem; }
.text-button.danger-button:hover { color: #8b2e2e; background: transparent; }
.site-footer { border-top: 1px solid var(--rule); color: var(--muted); font-size: .78rem; }
.site-footer p { margin: 0; padding: 1.4rem 0 2rem; }
.noscript { padding: 1rem; text-align: center; color: #722; background: #fee; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 740px) {
  .shell { width: min(100% - 32px, 1120px); }
  .header-content { min-height: 62px; }
  .header-note { display: none; }
  .page-shell { padding-top: 2.5rem; }
  .copyright-note { margin: 1.8rem 0 1.4rem; }
  .filters, .saved-views { grid-template-columns: 1fr; gap: .6rem; }
  .saved-view-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .saved-view-actions button { min-width: 0; padding-left: .35rem; padding-right: .35rem; }
  .paper-grid, .detail-columns, .study-panel { grid-template-columns: 1fr; }
  .paper-card { min-height: 250px; }
  .detail-header { padding: 1.1rem 0 1.35rem; }
}

@media (max-width: 390px) {
  .shell { width: calc(100% - 24px); }
  .page-shell { padding-bottom: 2.5rem; }
  .card-topline { align-items: flex-start; flex-direction: column; gap: .2rem; }
  .paper-card, .content-section { padding: 1.05rem; }
  .study-panel { padding: 1.05rem; }
  .content-section dl { grid-template-columns: 1fr; gap: .15rem; }
  .content-section dd { margin-bottom: .45rem; }
  .saved-view-actions { grid-template-columns: 1fr; }
  .card-footer, .review-control, .note-meta { align-items: flex-start; flex-direction: column; }
  .compact-control select { max-width: none; }
}