:root {
  --bg: #faf7f2;
  --bg-card: #ffffff;
  --ink: #1a1a1a;
  --ink-soft: #555;
  --ink-mute: #8a8a8a;
  --line: #e7e2d8;
  --accent: #cc2233; /* TIME red */
  --cat-health: #2f8a6f;
  --cat-tech: #3658c7;
  --cat-business: #b4732a;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(28, 24, 20, 0.08);
  --radius: 14px;
  --serif: "Playfair Display", "Noto Serif SC", Georgia, "Times New Roman",
    serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ---- Masthead ---- */
.masthead {
  border-bottom: 1px solid var(--line);
  background: #fffdf8;
  padding: 28px 32px 16px;
}

.masthead-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 20px;
}

.masthead-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-mark {
  width: 58px;
  height: 58px;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 36px;
  line-height: 58px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(204, 34, 51, 0.25);
}

.masthead-title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 38px;
  margin: 0;
  letter-spacing: -0.5px;
}
.masthead-title em {
  font-style: italic;
  color: var(--accent);
}

.masthead-sub {
  margin: 2px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.masthead-right {
  display: flex;
  gap: 12px;
  align-items: center;
}

.date-control {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.date-control label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
}

.date-control select {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 8px 32px 8px 12px;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink);
  cursor: pointer;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23555' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color 0.15s;
}
.date-control select:hover {
  border-color: #c8c1b0;
}

.btn-refresh {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.08s, background 0.15s;
}
.btn-refresh:hover {
  background: #000;
}
.btn-refresh:active {
  transform: translateY(1px);
}
.btn-refresh:disabled {
  background: #999;
  border-color: #999;
  cursor: progress;
}
.btn-refresh.is-loading svg {
  animation: spin 0.9s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.masthead-meta {
  max-width: 1200px;
  margin: 14px auto 0;
  font-size: 13px;
  color: var(--ink-mute);
  display: flex;
  gap: 8px;
  align-items: center;
}
.masthead-meta .dot {
  color: var(--line);
}

/* ---- Main ---- */
#main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 36px 32px 80px;
}

.category {
  margin-bottom: 48px;
}

.category-header {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink);
}

.category-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.cat-health .category-tag {
  background: var(--cat-health);
}
.cat-tech .category-tag {
  background: var(--cat-tech);
}
.cat-business .category-tag {
  background: var(--cat-business);
}

.cat-health .category-header {
  border-bottom-color: var(--cat-health);
}
.cat-tech .category-header {
  border-bottom-color: var(--cat-tech);
}
.cat-business .category-header {
  border-bottom-color: var(--cat-business);
}

.category-title {
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 900;
  margin: 0;
  letter-spacing: -0.3px;
}

.category-hint {
  margin-left: auto;
  font-size: 13px;
  color: var(--ink-mute);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-img {
  aspect-ratio: 16 / 9;
  background: #f0ece3;
  overflow: hidden;
  position: relative;
}
.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.card:hover .card-img img {
  transform: scale(1.04);
}
.card-img.no-img {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #bbb;
  font-family: var(--serif);
  font-size: 48px;
}

.card-body {
  padding: 18px 18px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--ink);
  letter-spacing: -0.2px;
}
.card-title a:hover {
  color: var(--accent);
}

.card-desc {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.55;
  margin: 0 0 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  color: var(--ink-mute);
}

.card-author {
  font-weight: 500;
  color: var(--ink-soft);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  color: var(--accent);
}
.card-link:hover {
  text-decoration: underline;
}

/* ---- Empty/loading states ---- */
.empty-state {
  padding: 60px 20px;
  text-align: center;
  color: var(--ink-mute);
}
.empty-state h2 {
  font-family: var(--serif);
  font-size: 28px;
  margin: 0 0 8px;
  color: var(--ink-soft);
}
.skeleton-card {
  background: linear-gradient(90deg, #f3efe7 0, #faf7ef 50%, #f3efe7 100%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius);
  aspect-ratio: 16 / 9;
}
@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ---- Toast ---- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: #fff;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  max-width: 90%;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.error {
  background: var(--accent);
}

/* ---- Footer ---- */
.foot {
  text-align: center;
  padding: 32px 24px 48px;
  color: var(--ink-mute);
  font-size: 13px;
  border-top: 1px solid var(--line);
}
.foot a {
  color: var(--ink-soft);
  text-decoration: underline;
  text-decoration-color: #d9d1bf;
  text-underline-offset: 3px;
}
.foot a:hover {
  color: var(--accent);
}
.foot-mini {
  margin: 6px 0 0;
  font-size: 12px;
}

/* ---- Top nav ---- */
.topnav {
  display: flex;
  gap: 18px;
  max-width: 1200px;
  margin: 10px auto 0;
  padding: 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
}
.topnav a {
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.topnav a:hover {
  color: var(--ink);
}
.topnav a.active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

/* ---- Card action bar ---- */
.card-actions {
  display: flex;
  gap: 6px;
  padding: 0 18px 14px;
  border-top: 1px dashed var(--line);
  padding-top: 12px;
  margin-top: auto;
}
.card-foot + .card-actions {
  margin-top: 0;
  border-top: none;
  padding-top: 0;
}

.btn-chip {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  color: var(--ink-soft);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--sans);
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.btn-chip:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.btn-chip.is-on {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}
.btn-chip.chip-favorite.is-on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-chip.chip-read.is-on {
  background: var(--cat-health);
  border-color: var(--cat-health);
  color: #fff;
}

/* ---- Library filters ---- */
.filters {
  max-width: 1200px;
  margin: 0 auto 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.filters .segment {
  display: inline-flex;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
}
.filters .segment button {
  border: 0;
  background: transparent;
  padding: 7px 14px;
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-soft);
  cursor: pointer;
  border-right: 1px solid var(--line);
}
.filters .segment button:last-child {
  border-right: 0;
}
.filters .segment button.active {
  background: var(--ink);
  color: #fff;
}
.filters input[type="search"],
.filters select {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 13px;
  font-family: var(--sans);
  color: var(--ink);
}
.filters input[type="search"] {
  min-width: 220px;
}

/* ---- Library list (two columns) ---- */
.list-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.list-cards .card-title {
  font-size: 18px;
}

/* ---- Reader ---- */
.reader-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 36px 32px 80px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
}
.reader-main {
  max-width: 720px;
  margin: 0 auto;
}
.reader-header {
  margin-bottom: 28px;
}
.reader-kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 8px;
}
.reader-title {
  font-family: var(--serif);
  font-size: 44px;
  line-height: 1.14;
  font-weight: 900;
  margin: 0 0 14px;
  letter-spacing: -0.4px;
}
.reader-meta {
  color: var(--ink-mute);
  font-size: 13px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.reader-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.reader-body {
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: 19px;
  line-height: 1.72;
  color: #211e1a;
}
.reader-body p {
  margin: 0 0 1.2em;
}
.reader-body h2,
.reader-body h3 {
  font-family: var(--serif);
  margin: 2em 0 0.6em;
  line-height: 1.2;
}
.reader-body img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.4em auto;
  border-radius: 6px;
}
.reader-body figure {
  margin: 1.4em 0;
}
.reader-body figcaption {
  font-size: 13px;
  color: var(--ink-mute);
  text-align: center;
  margin-top: 6px;
}
.reader-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.reader-body blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
  color: var(--ink-soft);
  font-style: italic;
  margin: 1.4em 0;
}

mark.anno {
  padding: 1px 2px;
  border-radius: 2px;
  background: #fff3a8;
  cursor: pointer;
}
mark.anno[data-color="yellow"] { background: #fff3a8; }
mark.anno[data-color="pink"]   { background: #ffd4de; }
mark.anno[data-color="green"]  { background: #c9eec2; }
mark.anno[data-color="blue"]   { background: #c9e2ff; }
mark.anno.has-note {
  box-shadow: inset 0 -2px 0 var(--accent);
}
span.vocab-hit {
  border-bottom: 1px dotted var(--cat-tech);
  padding-bottom: 1px;
  cursor: help;
}

/* ---- Selection toolbar ---- */
.anno-toolbar {
  position: absolute;
  z-index: 40;
  background: #1a1a1a;
  color: #fff;
  border-radius: 10px;
  padding: 6px;
  display: flex;
  gap: 4px;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -8px);
  transition: opacity 0.12s ease, transform 0.12s ease;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  font-size: 13px;
}
.anno-toolbar.show {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}
.anno-toolbar::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 50%;
  margin-left: -6px;
  border: 6px solid transparent;
  border-top-color: #1a1a1a;
  border-bottom: 0;
}
.anno-toolbar button {
  appearance: none;
  border: 0;
  background: transparent;
  color: #fff;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.anno-toolbar button:hover {
  background: rgba(255, 255, 255, 0.1);
}
.anno-toolbar .sep {
  width: 1px;
  background: rgba(255, 255, 255, 0.18);
  margin: 4px 2px;
}
.anno-toolbar .swatch {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0;
}
.anno-toolbar .swatch[data-color="yellow"] { background: #fff3a8; }
.anno-toolbar .swatch[data-color="pink"]   { background: #ffd4de; }
.anno-toolbar .swatch[data-color="green"]  { background: #c9eec2; }
.anno-toolbar .swatch[data-color="blue"]   { background: #c9e2ff; }

/* ---- Reader side panel ---- */
.reader-side {
  position: sticky;
  top: 24px;
  align-self: start;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 16px;
}
.panel h3 {
  font-family: var(--serif);
  font-size: 16px;
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}
.panel-empty {
  color: var(--ink-mute);
  font-size: 13px;
  font-style: italic;
}
.panel-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  cursor: pointer;
}
.panel-item:last-child { border-bottom: 0; }
.panel-item .quote {
  color: var(--ink);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.panel-item .note {
  margin-top: 4px;
  font-size: 12px;
  color: var(--ink-soft);
  font-style: italic;
}
.panel-item .meta {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 11px;
  color: var(--ink-mute);
}
.panel-item .meta button {
  appearance: none;
  border: 0;
  background: transparent;
  cursor: pointer;
  color: var(--ink-mute);
  font-size: 11px;
}
.panel-item .meta button:hover { color: var(--accent); }

.panel-vocab .lemma {
  font-weight: 600;
  font-family: Georgia, serif;
  font-size: 15px;
  color: var(--ink);
}
.panel-vocab .mastery {
  display: inline-flex;
  gap: 3px;
  margin-top: 4px;
}
.panel-vocab .pill {
  font-size: 10px;
  background: var(--line);
  color: var(--ink-soft);
  padding: 2px 6px;
  border-radius: 999px;
}
.panel-vocab .pill.on {
  background: var(--ink);
  color: #fff;
}

/* ---- Prompt modal (note / vocab) ---- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(20, 17, 14, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 90;
}
.modal-backdrop.show { display: flex; }
.modal {
  background: #fff;
  border-radius: 14px;
  width: min(440px, 92vw);
  padding: 22px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}
.modal h3 {
  font-family: var(--serif);
  margin: 0 0 12px;
  font-size: 22px;
}
.modal .quoted {
  background: #fff3a8;
  padding: 8px 10px;
  border-radius: 6px;
  font-family: Georgia, serif;
  font-size: 14px;
  margin-bottom: 14px;
  max-height: 100px;
  overflow: auto;
}
.modal textarea,
.modal input[type="text"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: var(--sans);
  font-size: 14px;
  resize: vertical;
  box-sizing: border-box;
}
.modal textarea { min-height: 80px; }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 14px;
}
.modal-actions button {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  font-family: var(--sans);
}
.modal-actions button.primary {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

/* ---- Vocabulary page ---- */
.vocab-table {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.vocab-row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 150px 110px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  gap: 16px;
  align-items: start;
  font-size: 14px;
}
.vocab-row:last-child { border-bottom: 0; }
.vocab-row.head {
  background: #faf7f2;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 600;
}
.vocab-word {
  font-family: Georgia, "Noto Serif SC", serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.2px;
}
.vocab-word .lemma {
  display: block;
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
  font-weight: 400;
  margin-top: 2px;
  font-family: var(--sans);
}
.vocab-context {
  color: var(--ink-soft);
  font-style: italic;
  font-family: Georgia, serif;
  line-height: 1.5;
  font-size: 13px;
  max-height: 110px;
  overflow: auto;
}
.vocab-context .source {
  display: block;
  font-style: normal;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ink-mute);
  margin-top: 4px;
}
.vocab-mastery {
  display: flex;
  gap: 4px;
}
.vocab-mastery button {
  flex: 1;
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 6px;
  padding: 4px 0;
  font-size: 11px;
  cursor: pointer;
  color: var(--ink-soft);
}
.vocab-mastery button.active {
  background: var(--cat-tech);
  color: #fff;
  border-color: var(--cat-tech);
}
.vocab-actions {
  display: flex;
  gap: 6px;
  align-items: center;
  justify-content: flex-end;
}

/* ---- Responsive ---- */
@media (max-width: 960px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .masthead-title {
    font-size: 32px;
  }
  .category-title {
    font-size: 26px;
  }
  .reader-shell {
    grid-template-columns: 1fr;
    padding: 24px 20px 60px;
  }
  .reader-title { font-size: 32px; }
  .reader-side {
    position: static;
    max-height: none;
    flex-direction: column;
  }
  .list-cards {
    grid-template-columns: 1fr;
  }
  .vocab-row {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .masthead {
    padding: 20px 18px 14px;
  }
  #main {
    padding: 24px 18px 60px;
  }
  .cards {
    grid-template-columns: 1fr;
  }
  .masthead-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .masthead-right {
    width: 100%;
    justify-content: space-between;
  }
}