/* =============================================================
   IrishTaxTools — Tax Library CSS (Sprint 4)
   All custom properties from main.css :root
   ============================================================= */

/* ── Reading Progress Bar ────────────────────────────────────── */
.lib-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: transparent;
  z-index: 9999;
}
.lib-progress-bar__fill {
  height: 100%;
  background: var(--color-gold, #c9a84c);
  width: 0%;
  transition: width 0.1s linear;
}

/* ── Library Hero ────────────────────────────────────────────── */
.lib-hero {
  background: linear-gradient(135deg, #0f2318 0%, #163316 60%, #1a3d1a 100%);
  color: #fff;
  padding: 4rem 0 3rem;
}
.lib-hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.lib-hero__text h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: #fff;
  margin: 0.75rem 0;
  line-height: 1.15;
}
.lib-hero__sub {
  color: rgba(255,255,255,0.8);
  font-size: 1.1rem;
  margin: 0 0 1.5rem;
  line-height: 1.6;
}
.lib-hero__stats {
  display: flex;
  gap: 2rem;
  margin-top: 1.5rem;
}
.lib-hero__stats span {
  color: rgba(255,255,255,0.7);
  font-size: 0.875rem;
}
.lib-hero__stats strong {
  color: var(--color-gold, #c9a84c);
  font-size: 1.5rem;
  display: block;
  font-weight: 700;
}

/* ── Library Search Form ─────────────────────────────────────── */
.lib-hero__search {
  position: relative;
}
.lib-search-form {
  position: relative;
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-md, 8px);
  padding: 0.75rem 1rem;
  gap: 0.75rem;
  transition: border-color 0.2s, background 0.2s;
}
.lib-search-form:focus-within {
  border-color: var(--color-gold, #c9a84c);
  background: rgba(255,255,255,0.12);
}
.lib-search-form__icon { color: rgba(255,255,255,0.5); flex-shrink: 0; }
.lib-search-form__input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: #fff;
  font-size: 1rem;
  min-width: 0;
}
.lib-search-form__input::placeholder { color: rgba(255,255,255,0.45); }
.lib-search-form__hint {
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.5);
  border-radius: 4px;
  padding: 0.125rem 0.375rem;
  font-size: 0.75rem;
  white-space: nowrap;
}

.lib-search-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: #fff;
  border: 1px solid var(--color-border, #dde5d0);
  border-radius: var(--radius-md, 8px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.18);
  z-index: 200;
  max-height: 380px;
  overflow-y: auto;
}
.lib-search-result {
  display: block;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border, #dde5d0);
  text-decoration: none;
  color: inherit;
  transition: background 0.15s;
}
.lib-search-result:last-child { border-bottom: none; }
.lib-search-result:hover, .lib-search-result[aria-selected="true"] {
  background: var(--color-surface, #f5f9f2);
}
.lib-search-result__cat {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-green-mid, #2d6a2d);
  margin-bottom: 0.125rem;
}
.lib-search-result__title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text, #1a1a1a);
}
.lib-search-result__desc {
  font-size: 0.8rem;
  color: var(--color-text-light, #666);
  margin-top: 0.125rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Section Titles ──────────────────────────────────────────── */
.lib-section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 1.5rem;
  color: var(--color-text, #1a1a1a);
}

/* ── Guide Grid ──────────────────────────────────────────────── */
.lib-popular, .lib-all-guides, .lib-cat-guides, .lib-related-guides {
  padding: 3rem 0;
}
.lib-guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.lib-guide-grid--sm {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.lib-guide-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem 1.5rem;
  background: #fff;
  border: 1px solid var(--color-border, #dde5d0);
  border-radius: var(--radius-md, 8px);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
}
.lib-guide-card:hover {
  border-color: var(--color-green-mid, #2d6a2d);
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-1px);
}
.lib-guide-card__meta {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.lib-guide-card__cat {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-green-mid, #2d6a2d);
}
.lib-guide-card__time {
  font-size: 0.75rem;
  color: var(--color-text-light, #666);
  margin-left: auto;
}
.lib-guide-card__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text, #1a1a1a);
  margin: 0;
  line-height: 1.35;
}
.lib-guide-card__desc {
  font-size: 0.85rem;
  color: var(--color-text-light, #666);
  margin: 0;
  line-height: 1.5;
  flex: 1;
}
.lib-guide-card__diff {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  align-self: flex-start;
}
.lib-guide-card__diff--beginner  { background: #e6f4e6; color: #1a5c1a; }
.lib-guide-card__diff--intermediate { background: #fff3e0; color: #8b4500; }
.lib-guide-card__diff--advanced  { background: #fde8e8; color: #8b0000; }

/* ── Categories Grid ─────────────────────────────────────────── */
.lib-categories { padding: 3rem 0; background: var(--color-surface, #f5f9f2); }
.lib-cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}
.lib-cat-card {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding: 1.25rem;
  background: #fff;
  border: 1px solid var(--color-border, #dde5d0);
  border-radius: var(--radius-md, 8px);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.lib-cat-card:hover {
  border-color: var(--color-green-mid, #2d6a2d);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.lib-cat-card__icon { font-size: 1.75rem; line-height: 1; margin-bottom: 0.25rem; }
.lib-cat-card__title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text, #1a1a1a);
  margin: 0;
}
.lib-cat-card__desc {
  font-size: 0.78rem;
  color: var(--color-text-light, #666);
  margin: 0;
  line-height: 1.45;
  flex: 1;
}
.lib-cat-card__count {
  font-size: 0.72rem;
  color: var(--color-green-mid, #2d6a2d);
  font-weight: 600;
}

/* ── All-Guides List ─────────────────────────────────────────── */
.lib-guide-list { display: flex; flex-direction: column; gap: 0; }
.lib-guide-row {
  display: grid;
  grid-template-columns: 120px 1fr 120px;
  gap: 1rem;
  align-items: center;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border, #dde5d0);
  text-decoration: none;
  color: inherit;
  transition: background 0.15s;
  border-radius: 6px;
}
.lib-guide-row:hover { background: var(--color-surface, #f5f9f2); }
.lib-guide-row__cat {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-green-mid, #2d6a2d);
}
.lib-guide-row__title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text, #1a1a1a);
}
.lib-guide-row__meta {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  align-items: center;
}
.lib-guide-row__diff {
  font-size: 0.7rem;
  color: var(--color-text-light, #666);
}
.lib-guide-row__time {
  font-size: 0.7rem;
  color: var(--color-text-light, #666);
}

/* ── Category Hero ───────────────────────────────────────────── */
.lib-cat-hero {
  background: linear-gradient(135deg, #0f2318 0%, #1a3d1a 100%);
  color: #fff;
  padding: 3rem 0 2.5rem;
  text-align: center;
}
.lib-cat-hero__icon { font-size: 3rem; line-height: 1; margin-bottom: 0.75rem; }
.lib-cat-hero h1 { color: #fff; margin: 0 0 0.75rem; font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
.lib-cat-hero__desc { color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 0.75rem; }
.lib-cat-hero__count { color: rgba(255,255,255,0.5); font-size: 0.875rem; }

/* ── Breadcrumb ──────────────────────────────────────────────── */
.lib-breadcrumb {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 1.25rem;
}
.lib-breadcrumb a { color: rgba(255,255,255,0.65); text-decoration: none; }
.lib-breadcrumb a:hover { color: #fff; }
.lib-breadcrumb span { color: rgba(255,255,255,0.85); }

/* ── Guide Hero ──────────────────────────────────────────────── */
.lib-guide-hero {
  background: linear-gradient(135deg, #0f2318 0%, #163316 60%, #1a3d1a 100%);
  color: #fff;
  padding: 3rem 0 2.5rem;
}
.lib-guide-hero__badges { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.lib-guide-hero h1 {
  color: #fff;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  margin: 0 0 0.75rem;
  line-height: 1.2;
  max-width: 800px;
}
.lib-guide-hero__desc {
  color: rgba(255,255,255,0.8);
  font-size: 1.05rem;
  margin: 0 0 1.25rem;
  max-width: 700px;
}
.lib-guide-hero__meta {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.lib-meta-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.6);
}
.lib-meta-item svg { flex-shrink: 0; }

/* ── Guide Layout (sidebar + article) ───────────────────────── */
.lib-guide-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  align-items: start;
  padding-top: 2.5rem;
  padding-bottom: 3rem;
}

/* ── TOC ─────────────────────────────────────────────────────── */
.lib-toc {
  position: sticky;
  top: 90px;
  background: #fff;
  border: 1px solid var(--color-border, #dde5d0);
  border-radius: var(--radius-md, 8px);
  padding: 1.25rem;
}
.lib-toc__title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-light, #666);
  margin: 0 0 0.75rem;
}
.lib-toc__nav { display: flex; flex-direction: column; gap: 0.25rem; }
.lib-toc__link {
  display: block;
  font-size: 0.82rem;
  color: var(--color-text-light, #666);
  text-decoration: none;
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  border-left: 2px solid transparent;
  transition: all 0.15s;
  line-height: 1.4;
}
.lib-toc__link:hover, .lib-toc__link.is-active {
  color: var(--color-green-mid, #2d6a2d);
  background: var(--color-surface, #f5f9f2);
  border-left-color: var(--color-green-mid, #2d6a2d);
}

/* ── Article Typography ──────────────────────────────────────── */
.lib-guide-article {
  min-width: 0;
}
.lib-guide-article h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text, #1a1a1a);
  margin: 2rem 0 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border, #dde5d0);
}
.lib-guide-article h2:first-child { margin-top: 0; border-top: none; }
.lib-guide-article p {
  color: var(--color-text, #1a1a1a);
  line-height: 1.75;
  margin: 0 0 1rem;
  font-size: 0.975rem;
}
.lib-list {
  padding-left: 1.5rem;
  margin: 0.5rem 0 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}
.lib-list li {
  color: var(--color-text, #1a1a1a);
  line-height: 1.6;
  font-size: 0.975rem;
}
.lib-list--ordered { list-style: decimal; }

/* ── Quick Summary ───────────────────────────────────────────── */
.lib-quick-summary {
  background: var(--color-surface, #f5f9f2);
  border: 1px solid var(--color-border, #dde5d0);
  border-radius: var(--radius-md, 8px);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}
.lib-quick-summary__title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-light, #666);
  margin: 0 0 1rem;
}
.lib-quick-summary__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem 1.5rem;
  margin-bottom: 1rem;
}
.lib-quick-summary__item {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}
.lib-quick-summary__label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-light, #666);
}
.lib-quick-summary__value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text, #1a1a1a);
}
.lib-quick-summary__cta { margin-top: 0.75rem; }

/* ── Key Facts ───────────────────────────────────────────────── */
.lib-key-facts {
  margin-bottom: 2rem;
}
.lib-key-facts h2 { margin-top: 0 !important; border-top: none !important; }
.lib-key-facts__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.lib-fact-card {
  background: #fff;
  border: 1px solid var(--color-border, #dde5d0);
  border-radius: var(--radius-md, 8px);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.lib-fact-card__value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-green-mid, #2d6a2d);
  line-height: 1;
}
.lib-fact-card__label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text, #1a1a1a);
}
.lib-fact-card__note {
  font-size: 0.73rem;
  color: var(--color-text-light, #666);
}

/* ── Content Section ─────────────────────────────────────────── */
.lib-content-section { margin-bottom: 1rem; }

/* ── Examples ────────────────────────────────────────────────── */
.lib-examples { margin: 2rem 0; }
.lib-examples h2 { margin-top: 0 !important; }
.lib-example {
  background: #fff;
  border: 1px solid var(--color-border, #dde5d0);
  border-radius: var(--radius-md, 8px);
  overflow: hidden;
  margin-bottom: 1.25rem;
}
.lib-example__title {
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.75rem 1rem;
  background: var(--color-surface, #f5f9f2);
  border-bottom: 1px solid var(--color-border, #dde5d0);
  margin: 0;
  color: var(--color-text, #1a1a1a);
}
.lib-example__table {
  width: 100%;
  border-collapse: collapse;
}
.lib-example__table td {
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  color: var(--color-text, #1a1a1a);
  border-bottom: 1px solid var(--color-border, #dde5d0);
}
.lib-example__table td:last-child {
  text-align: right;
  font-weight: 600;
  white-space: nowrap;
}
.lib-example__table tr:last-child td { border-bottom: none; }
.lib-example__row--highlight td {
  background: #e8f5e8;
  color: var(--color-green-mid, #2d6a2d);
  font-weight: 700;
}

/* ── Common Mistakes ─────────────────────────────────────────── */
.lib-mistakes { margin: 2rem 0; }
.lib-mistakes h2 { margin-top: 0 !important; }
.lib-mistake-card {
  display: flex;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: #fff8e1;
  border: 1px solid #f0c040;
  border-left: 4px solid #f0c040;
  border-radius: var(--radius-md, 8px);
  margin-bottom: 1rem;
}
.lib-mistake-card__icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  line-height: 1.4;
  color: #b8860b;
}
.lib-mistake-card__body h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text, #1a1a1a);
  margin: 0 0 0.375rem;
}
.lib-mistake-card__body p {
  font-size: 0.85rem;
  color: var(--color-text-light, #666);
  margin: 0;
  line-height: 1.5;
}

/* ── Related Guides ──────────────────────────────────────────── */
.lib-related-guides { margin: 2.5rem 0; }
.lib-related-guides h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 1rem;
  padding: 0;
  border: none;
}

/* ── Mobile ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .lib-hero__inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .lib-hero__search { order: -1; }
  .lib-search-form__hint { display: none; }

  .lib-guide-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding-top: 1.5rem;
  }
  .lib-toc {
    position: static;
    /* Accordion on mobile */
  }
  .lib-toc__nav { display: none; }
  .lib-toc.is-open .lib-toc__nav { display: flex; }
  .lib-toc__title {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0;
  }
  .lib-toc__title::after {
    content: '▾';
    font-size: 1rem;
    color: var(--color-text-light, #666);
  }
  .lib-toc.is-open .lib-toc__title::after { content: '▴'; }
  .lib-toc.is-open .lib-toc__nav {
    display: flex;
    margin-top: 0.75rem;
  }

  .lib-guide-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
  .lib-guide-row__meta { justify-content: flex-start; }
  .lib-cat-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .lib-key-facts__grid { grid-template-columns: repeat(2, 1fr); }
  .lib-quick-summary__grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .lib-hero { padding: 2.5rem 0 2rem; }
  .lib-hero__stats { gap: 1rem; }
  .lib-guide-grid { grid-template-columns: 1fr; }
  .lib-cat-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Nav Dropdown for Tax Library ────────────────────────────── */
.lib-nav-dropdown-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.25rem 1rem;
  padding: 1rem 1.25rem;
}
.lib-nav-dropdown-grid a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--color-text, #1a1a1a);
  text-decoration: none;
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
  transition: background 0.15s, color 0.15s;
}
.lib-nav-dropdown-grid a:hover {
  background: var(--color-surface, #f5f9f2);
  color: var(--color-green-mid, #2d6a2d);
}
.lib-nav-cat-icon { font-size: 1rem; flex-shrink: 0; }