/* Yomu — vanilla CSS. Mobile-first; sidebar collapses to a top accordion. */

:root {
  --bg: #fafafa;
  --text: #1a1a1a;
  --text-muted: #666;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --card-bg: #ffffff;
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.05);
  --pill-bg: #eef0f3;
  --pill-text: #4b5563;
  --pill-border: #e3e6ea;
  --green: #15803d;
  --green-bg: #dcfce7;
  --yellow: #a16207;
  --yellow-bg: #fef3c7;
  --red: #b91c1c;
  --red-bg: #fee2e2;
  --blue: #1d4ed8;
  --blue-bg: #dbeafe;
  --border: #e5e7eb;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui,
    "Helvetica Neue", Arial, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Noto Sans CJK JP", "Noto Sans CJK SC", "Noto Sans CJK TC",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 16px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

/* Header ------------------------------------------------------------ */

.site-header {
  background: white;
  border-bottom: 1px solid var(--border);
  padding: 1rem;
}

.site-header__inner {
  max-width: 80rem;
  margin: 0 auto;
}

.site-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-tagline {
  margin: 0.125rem 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Layout ------------------------------------------------------------ */

.layout {
  max-width: 80rem;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 768px) {
  .layout {
    grid-template-columns: 18rem 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
  }
}

/* Filters ----------------------------------------------------------- */

.filters {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  align-self: start;
}

@media (min-width: 768px) {
  .filters {
    position: sticky;
    top: 1rem;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
  }
}

.filters__toggle {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: white;
  border: none;
  border-bottom: 1px solid var(--border);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.filters__toggle-chev {
  transition: transform 150ms ease;
}

.filters__toggle[aria-expanded="true"] .filters__toggle-chev {
  transform: rotate(180deg);
}

.filters__body {
  display: none;
  padding: 1rem;
}

.filters__body.is-open {
  display: block;
}

@media (min-width: 768px) {
  .filters__toggle { display: none; }
  .filters__body { display: block; }
}

.filter {
  margin-bottom: 1.25rem;
}

.filter:last-child {
  margin-bottom: 0;
}

.filter__label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 0.5rem;
}

.filter__input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  background: white;
}

.filter__input:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}

.filter__options {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.filter__options--scroll {
  max-height: 14rem;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem;
}

.filter__options label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  cursor: pointer;
  padding: 0.125rem 0;
}

.filter__options input[type="checkbox"],
.filter__options input[type="radio"] {
  margin: 0;
  cursor: pointer;
  accent-color: var(--accent);
}

.filter__options .filter__count {
  margin-left: auto;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}

.filters__reset {
  width: 100%;
  padding: 0.5rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--text-muted);
}

.filters__reset:hover {
  background: var(--pill-bg);
  color: var(--text);
}

/* Results ----------------------------------------------------------- */

.results__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.results__count {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.results__footer {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
}

.results__pager {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.results__pager button {
  padding: 0.375rem 0.75rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.results__pager button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.results__pager button:not(:disabled):hover {
  background: var(--pill-bg);
}

/* Cards ------------------------------------------------------------- */

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

@media (min-width: 1100px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: box-shadow 150ms ease, transform 150ms ease;
  cursor: pointer;
}

.card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-1px);
}

.card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
}

.card__title-wrap {
  flex: 1;
  min-width: 0;
}

.card__title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.3;
}

.card__title a {
  color: var(--text);
}

.card__title a:hover {
  color: var(--accent);
  text-decoration: none;
}

.card__author {
  margin: 0.125rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.card__lang {
  flex-shrink: 0;
  font-size: 1.25rem;
  line-height: 1;
}

.card__lang-text {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  text-align: center;
  margin-top: 0.125rem;
}

.card__synopsis {
  margin: 0;
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.5;
}

.card__synopsis--empty {
  color: var(--text-muted);
  font-style: italic;
}

.card__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  background: var(--pill-bg);
  color: var(--pill-text);
  border: 1px solid var(--pill-border);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
}

.pill--source {
  background: var(--blue-bg);
  color: var(--blue);
  border-color: transparent;
}

.pill--complete {
  background: var(--green-bg);
  color: var(--green);
  border-color: transparent;
}

.pill--ongoing {
  background: var(--yellow-bg);
  color: var(--yellow);
  border-color: transparent;
}

.pill--paid {
  background: var(--red-bg);
  color: var(--red);
  border-color: transparent;
}

.pill--free {
  background: var(--green-bg);
  color: var(--green);
  border-color: transparent;
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.card__tag {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: transparent;
  padding: 0.0625rem 0.4rem;
  border: 1px solid var(--pill-border);
  border-radius: 4px;
}

/* Known-words filter ------------------------------------------------ */

.known-words__lang {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.known-words__lang label {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.9rem;
  cursor: pointer;
}

.known-words__lang input[type="radio"] {
  margin: 0;
  cursor: pointer;
  accent-color: var(--accent);
}

.known-words__input {
  width: 100%;
  min-height: 5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9rem;
  resize: vertical;
  background: white;
}

.known-words__actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.known-words__btn {
  flex: 1;
  padding: 0.375rem 0.5rem;
  border: 1px solid var(--border);
  background: white;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text);
}

.known-words__btn:hover {
  background: var(--pill-bg);
}

.known-words__btn--apply {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.known-words__btn--apply:hover {
  background: var(--accent-hover);
  color: white;
}

.known-words__status {
  margin: 0.5rem 0 0;
  color: var(--text-muted);
  font-size: 0.8rem;
  min-height: 1em;
}

.known-words__status--error {
  color: var(--red);
}

.known-words__threshold {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.known-words__threshold-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.known-words__threshold-pct {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.known-words__threshold-slider {
  width: 100%;
  accent-color: var(--accent);
}

/* Per-card "% known" pill — color graded by coverage. */

.pill--known-high {
  background: var(--green-bg);
  color: var(--green);
  border-color: transparent;
}

.pill--known-mid {
  background: var(--blue-bg);
  color: var(--blue);
  border-color: transparent;
}

.pill--known-low {
  background: var(--yellow-bg);
  color: var(--yellow);
  border-color: transparent;
}

.pill--known-bad {
  background: var(--red-bg);
  color: var(--red);
  border-color: transparent;
}

/* Per-card "you don't know yet" preview — shown on hover/click. */

.card__unknown {
  margin-top: 0.25rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: none;
}

.card.card--show-unknown .card__unknown,
.card:hover .card__unknown {
  display: block;
}

.card__unknown-label {
  font-weight: 600;
  margin-right: 0.25rem;
  color: var(--text);
}

.card__unknown-word {
  display: inline-block;
  padding: 0.0625rem 0.4rem;
  margin: 0 0.25rem 0.25rem 0;
  background: var(--pill-bg);
  border: 1px solid var(--pill-border);
  border-radius: 4px;
  font-size: 0.82rem;
  white-space: nowrap;
}

.card__unknown-word--oov {
  background: transparent;
  font-style: italic;
}

/* Status overlays --------------------------------------------------- */

.status {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 40rem;
  margin: 0 auto;
}

.status--error {
  color: var(--red);
  background: var(--red-bg);
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  margin: 1rem;
  padding: 1.5rem;
}

.status--empty {
  color: var(--text-muted);
}

.status--hidden {
  display: none;
}

.status code {
  background: rgba(0, 0, 0, 0.06);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-size: 0.9em;
}

/* Footer ------------------------------------------------------------ */

.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Skeletons --------------------------------------------------------- */

.card--skeleton {
  pointer-events: none;
}

.card--skeleton .skel {
  background: linear-gradient(
    90deg,
    rgba(0, 0, 0, 0.05) 25%,
    rgba(0, 0, 0, 0.08) 50%,
    rgba(0, 0, 0, 0.05) 75%
  );
  background-size: 200% 100%;
  animation: skel 1.4s ease-in-out infinite;
  border-radius: 4px;
  height: 0.85rem;
}

.card--skeleton .skel--title { height: 1.1rem; width: 60%; }
.card--skeleton .skel--line { width: 100%; margin-top: 0.4rem; }
.card--skeleton .skel--line-short { width: 75%; margin-top: 0.4rem; }

@keyframes skel {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}