:root {
  color-scheme: light;
  --bg: #f6f4ee;
  --ink: #17201c;
  --muted: #65716c;
  --line: #d9d5c9;
  --panel: #fffdf8;
  --panel-strong: #f0eee6;
  --teal: #176b68;
  --teal-soft: #d7ece8;
  --amber: #bc7a1a;
  --amber-soft: #f4e5c7;
  --rose: #a34055;
  --rose-soft: #f2dbe0;
  --shadow: 0 12px 30px rgba(30, 36, 32, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }

.app-shell { display: grid; grid-template-columns: 250px minmax(0, 1fr); min-height: 100vh; }

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 18px 14px;
  overflow-y: auto;
  background: #202821;
  color: #f9f6ee;
}

.brand { display: flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 2px; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: #e9c46a;
  color: #202821;
  font-weight: 800;
}
.brand strong, .brand small { display: block; }
.brand strong { font-size: 16px; }
.brand small { color: rgba(249, 246, 238, 0.62); font-size: 12px; }

.sidebar-search { display: grid; gap: 5px; margin-top: 20px; }
.sidebar-search span { color: rgba(249, 246, 238, 0.64); font-size: 12px; }
.sidebar-search input {
  min-width: 0;
  min-height: 38px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  outline: 0;
  background: rgba(255, 255, 255, 0.08);
  color: #fffdf8;
}
.sidebar-search input::placeholder { color: rgba(249, 246, 238, 0.48); }
.sidebar-search input:focus { border-color: #e9c46a; box-shadow: 0 0 0 3px rgba(233, 196, 106, 0.18); }

.favorites-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  gap: 8px;
  min-height: 36px;
  margin-top: 10px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 6px;
  background: transparent;
  color: rgba(249, 246, 238, 0.8);
  cursor: pointer;
  text-align: left;
}
.favorites-toggle:hover, .favorites-toggle.active { background: rgba(233, 196, 106, 0.15); border-color: rgba(233, 196, 106, 0.45); color: #fffdf8; }
.favorites-toggle > span { color: #e9c46a; font-size: 15px; }
.favorites-toggle small { margin-left: auto; color: inherit; font-size: 12px; }
.auth-bar { display: flex; align-items: center; justify-content: flex-end; gap: 8px; color: var(--muted); font-size: 12px; }
#authIdentity { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.auth-toggle { border: 1px solid var(--line); padding: 3px 7px; border-radius: 4px; background: #fff; color: var(--teal); cursor: pointer; font-size: 12px; }
.auth-toggle:hover, .auth-toggle:focus-visible { border-color: var(--teal); color: var(--ink); outline: 0; }

.week-list { display: grid; gap: 3px; margin-top: 22px; }
.week-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 6px;
  color: rgba(249, 246, 238, 0.76);
}
.week-link:hover, .week-link.active { background: rgba(255, 255, 255, 0.11); color: #fffdf8; }
.week-link small { color: rgba(249, 246, 238, 0.5); font-size: 12px; white-space: nowrap; }

.content { width: min(1360px, 100%); padding: 22px clamp(18px, 3vw, 44px) 52px; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.topbar-meta { display: grid; flex: 0 0 auto; justify-items: end; gap: 5px; }
h1 { margin: 0; font-size: clamp(25px, 2.4vw, 34px); line-height: 1.15; letter-spacing: 0; }
.week-status { margin: 3px 0 0; color: var(--muted); font-size: 13px; }
.updated { flex: 0 0 auto; color: var(--muted); font-size: 12px; }

.metrics { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 12px; color: var(--muted); font-size: 13px; }
.metrics span { display: inline-flex; align-items: baseline; gap: 4px; }
.metrics strong { color: var(--ink); font-size: 18px; }

.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 16px; padding: 9px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.segmented { display: inline-grid; grid-auto-flow: column; grid-auto-columns: minmax(55px, auto); min-height: 34px; padding: 2px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel-strong); }
.filter-button { border: 0; border-radius: 4px; background: transparent; color: var(--muted); cursor: pointer; font-size: 13px; }
.filter-button.active { background: #fff; color: var(--ink); box-shadow: 0 1px 4px rgba(30, 36, 32, 0.08); }
select { min-height: 34px; padding: 0 8px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--ink); outline: none; font-size: 13px; }
select:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(23, 107, 104, 0.13); }

.paper-list { display: grid; gap: 12px; margin-top: 14px; }
.paper-card { padding: clamp(16px, 2vw, 24px); border: 1px solid var(--line); border-radius: 8px; background: var(--panel); box-shadow: var(--shadow); }
.paper-card[hidden] { display: none; }
.paper-head, .rank-source { display: flex; align-items: center; gap: 7px; }
.paper-head { justify-content: space-between; gap: 12px; }
.rank-source { flex-wrap: wrap; }
.rank, .source-pill, .section-pill, .week-pill { display: inline-flex; align-items: center; justify-content: center; min-height: 24px; padding: 0 7px; border-radius: 999px; font-size: 12px; font-weight: 750; }
.rank { background: #202821; color: #fffdf8; }
.source-pill.arxiv { background: var(--teal-soft); color: var(--teal); }
.source-pill.ssrn { background: var(--amber-soft); color: var(--amber); }
.section-pill { background: var(--rose-soft); color: var(--rose); }
.week-pill { color: var(--muted); background: #f2f0e9; font-weight: 600; }
.score { display: flex; align-items: baseline; gap: 2px; color: var(--teal); }
.score strong { font-size: 24px; line-height: 1; }
.score span { color: var(--muted); font-size: 13px; }
.card-actions { display: grid; justify-items: end; gap: 6px; }
.favorite-button {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: #8a8374;
  cursor: pointer;
  font-size: 19px;
  line-height: 1;
}
.favorite-button:hover, .favorite-button:focus-visible { border-color: #c58d27; color: #bc7a1a; outline: 0; box-shadow: 0 0 0 3px rgba(233, 196, 106, 0.2); }
.favorite-button.saved { border-color: #c58d27; background: #fff5db; color: #bc7a1a; }

.paper-card h2 { margin: 12px 0 2px; max-width: 1040px; font-size: clamp(19px, 1.8vw, 25px); line-height: 1.28; letter-spacing: 0; }
.translated-title { margin: 0; color: var(--teal); font-size: 15px; font-weight: 650; }
.authors, .paper-date-fallback { margin: 7px 0 0; color: var(--muted); font-size: 14px; }
.paper-dates { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.paper-dates span { padding: 2px 7px; border: 1px solid var(--line); border-radius: 4px; color: #4d5a54; background: #faf8f2; font-size: 12px; }
.topics, .quick-links { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.topics span { padding: 3px 7px; border: 1px solid var(--line); border-radius: 999px; color: #45514c; background: #faf7ef; font-size: 12px; }
.quick-links a { display: inline-flex; align-items: center; min-height: 27px; padding: 0 8px; border-radius: 5px; background: #202821; color: #fffdf8; font-size: 12px; font-weight: 700; }
.paper-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 22px; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.paper-grid section { min-width: 0; }
.paper-grid h3 { margin: 0 0 4px; color: var(--teal); font-size: 13px; }
.paper-grid p { margin: 0; color: #33403a; font-size: 14px; }
.empty-state, .empty-page { padding: 28px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); }
.empty-state { margin-top: 16px; color: var(--muted); }
.auth-dialog { width: min(390px, calc(100vw - 28px)); padding: 0; border: 1px solid var(--line); border-radius: 8px; background: #fffdf8; color: var(--ink); box-shadow: 0 20px 70px rgba(20, 31, 25, 0.24); }
.auth-dialog::backdrop { background: rgba(20, 31, 25, 0.38); }
.auth-dialog-head { display: flex; align-items: center; justify-content: space-between; padding: 17px 18px 12px; }
.auth-dialog h2 { margin: 0; font-size: 18px; }
.dialog-close { display: grid; place-items: center; width: 28px; height: 28px; padding: 0; border: 0; border-radius: 5px; background: transparent; color: var(--muted); cursor: pointer; font-size: 22px; line-height: 1; }
.dialog-close:hover { background: var(--panel-strong); color: var(--ink); }
.auth-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 3px; margin: 0 18px; padding: 3px; border-radius: 6px; background: var(--panel-strong); }
.auth-tab { min-height: 31px; border: 0; border-radius: 4px; background: transparent; color: var(--muted); cursor: pointer; font-size: 13px; }
.auth-tab.active { background: #fff; color: var(--ink); box-shadow: 0 1px 4px rgba(30, 36, 32, 0.08); }
.auth-form { display: grid; gap: 12px; padding: 16px 18px 18px; }
.auth-form label { display: grid; gap: 5px; color: #4d5a54; font-size: 13px; }
.auth-form input { width: 100%; min-height: 38px; padding: 0 9px; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); outline: 0; }
.auth-form input:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(23, 107, 104, 0.13); }
.auth-form > button { min-height: 38px; border: 0; border-radius: 5px; background: var(--teal); color: #fff; cursor: pointer; font-weight: 700; }
.auth-form > button:disabled { cursor: wait; opacity: 0.72; }
.auth-error { min-height: 1.3em; margin: -4px 0 0; color: var(--rose); font-size: 12px; }

@media (max-width: 980px) {
  .app-shell { display: block; }
  .sidebar { position: relative; height: auto; padding: 14px; }
  .sidebar-search { margin-top: 14px; }
  .week-list { grid-template-columns: repeat(auto-fit, minmax(145px, 1fr)); margin-top: 14px; }
  .content { padding: 18px 14px 42px; }
  .paper-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .topbar { align-items: flex-start; flex-direction: column; gap: 4px; }
  .topbar-meta { justify-items: start; }
  .auth-bar { justify-content: flex-start; }
  .metrics { gap: 10px 14px; }
  .controls { align-items: stretch; }
  .segmented, select { width: 100%; }
  .paper-card { padding: 14px; }
  .score { align-self: flex-start; }
}