/*
 * Dynamic Smart Sidebar — Frontend Styles
 * Version: 1.0.0
 *
 * CSS custom properties make it easy to re-theme by overriding
 * :root values in your theme's stylesheet.
 */

/* ── Variables ─────────────────────────────────────────────── */
:root {
  --dss-accent:        #3b6cf7;
  --dss-accent-light:  #eef2ff;
  --dss-active-bg:     #3b6cf7;
  --dss-active-text:   #ffffff;
  --dss-card-bg:       #ffffff;
  --dss-card-radius:   10px;
  --dss-card-shadow:   0 2px 12px rgba(0,0,0,.07);
  --dss-card-pad:      1.25rem 1.5rem;
  --dss-border:        #e8eaf0;
  --dss-text:          #1a1a2e;
  --dss-text-muted:    #6b7280;
  --dss-font:          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --dss-transition:    .2s ease;
}

/* ── Sidebar wrapper ────────────────────────────────────────── */
.dss-sidebar {
  font-family: var(--dss-font);
  color: var(--dss-text);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: 100%;
  box-sizing: border-box;
}

/* ── Card ───────────────────────────────────────────────────── */
.dss-card {
  background: var(--dss-card-bg);
  border-radius: var(--dss-card-radius);
  box-shadow: var(--dss-card-shadow);
  border: 1px solid var(--dss-border);
  overflow: hidden;
}

.dss-card__title {
  margin: 0;
  padding: var(--dss-card-pad);
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--dss-text-muted);
  border-bottom: 1px solid var(--dss-border);
  background: #fafbff;
}

/* ── Section 1 — Subcategory list ──────────────────────────── */
.dss-term-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.dss-term-list__item {
  border-bottom: 1px solid var(--dss-border);
}

.dss-term-list__item:last-child {
  border-bottom: none;
}

.dss-term-list__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .65rem 1.5rem;
  text-decoration: none;
  color: var(--dss-text);
  font-size: .92rem;
  transition: background var(--dss-transition), color var(--dss-transition);
}

.dss-term-list__link:hover {
  background: var(--dss-accent-light);
  color: var(--dss-accent);
}

.dss-term-list__item--active .dss-term-list__link {
  background: var(--dss-active-bg);
  color: var(--dss-active-text);
  font-weight: 600;
}

.dss-term-list__count {
  font-size: .78rem;
  opacity: .7;
}

/* ── Section 2 — Search ─────────────────────────────────────── */
.dss-search__form {
  display: flex;
  gap: .5rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--dss-border);
}

.dss-search__input {
  flex: 1;
  padding: .5rem .75rem;
  border: 1px solid var(--dss-border);
  border-radius: 6px;
  font-size: .9rem;
  font-family: var(--dss-font);
  color: var(--dss-text);
  background: #fafbff;
  outline: none;
  transition: border-color var(--dss-transition), box-shadow var(--dss-transition);
}

.dss-search__input:focus {
  border-color: var(--dss-accent);
  box-shadow: 0 0 0 3px rgba(59,108,247,.15);
}

.dss-search__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: .5rem .75rem;
  background: var(--dss-accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background var(--dss-transition);
}

.dss-search__btn:hover {
  background: #2a54d8;
}

.dss-search__results {
  padding: 0 1.5rem;
  max-height: 260px;
  overflow-y: auto;
}

.dss-search__results:not(:empty) {
  padding-top: .75rem;
  padding-bottom: .75rem;
}

.dss-search__result-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.dss-search__result-item {
  display: flex;
  flex-direction: column;
  padding: .45rem 0;
  border-bottom: 1px solid var(--dss-border);
  gap: .15rem;
}

.dss-search__result-item:last-child {
  border-bottom: none;
}

.dss-search__result-link {
  font-size: .9rem;
  color: var(--dss-accent);
  text-decoration: none;
  font-weight: 500;
}

.dss-search__result-link:hover {
  text-decoration: underline;
}

.dss-search__result-date {
  font-size: .75rem;
  color: var(--dss-text-muted);
}

.dss-search__no-results {
  font-size: .88rem;
  color: var(--dss-text-muted);
  text-align: center;
  padding: .75rem 0;
  margin: 0;
}

/* ── Sections 3-5 — Post lists ──────────────────────────────── */
.dss-post-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.dss-post-list__item {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  padding: .75rem 1.5rem;
  border-bottom: 1px solid var(--dss-border);
  transition: background var(--dss-transition);
}

.dss-post-list__item:last-child {
  border-bottom: none;
}

.dss-post-list__item:hover {
  background: var(--dss-accent-light);
}

.dss-post-list__thumb {
  flex-shrink: 0;
}

.dss-post-list__thumb img {
  width: 54px;
  height: 54px;
  object-fit: cover;
  border-radius: 6px;
  display: block;
}

.dss-post-list__meta {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  min-width: 0;
}

.dss-post-list__title {
  font-size: .9rem;
  font-weight: 600;
  color: var(--dss-text);
  text-decoration: none;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.dss-post-list__title:hover {
  color: var(--dss-accent);
}

.dss-post-list__date,
.dss-post-list__stat {
  font-size: .75rem;
  color: var(--dss-text-muted);
}

/* ── Loading spinner (AJAX) ─────────────────────────────────── */
.dss-spinner {
  display: flex;
  justify-content: center;
  padding: .75rem 0;
}

.dss-spinner::after {
  content: '';
  width: 20px;
  height: 20px;
  border: 2px solid var(--dss-border);
  border-top-color: var(--dss-accent);
  border-radius: 50%;
  animation: dss-spin .7s linear infinite;
}

@keyframes dss-spin {
  to { transform: rotate(360deg); }
}

/* ── Screen-reader-only utility ─────────────────────────────── */
.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  .dss-card__title {
    font-size: .75rem;
    padding: .9rem 1.1rem;
  }

  .dss-term-list__link {
    padding: .6rem 1.1rem;
    font-size: .88rem;
  }

  .dss-search__form {
    padding: .75rem 1.1rem;
  }

  .dss-post-list__item {
    padding: .65rem 1.1rem;
  }

  .dss-post-list__thumb img {
    width: 44px;
    height: 44px;
  }
}