/* =============================================================
   Pyramid AI — Changelog page styles
   Depends on colors_and_type.css tokens. No other dependencies.
   ============================================================= */

/* ── Outer two-column wrapper: year-nav | timeline ── */
.changelog-outer {
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 40px 120px;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 0;
}

/* ── Year-jump sidebar ── */

.year-nav {
  position: sticky;
  top: 88px;
}

.year-nav-label {
  font-size: 11px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--fg-4);
  margin-bottom: 12px;
}

.year-nav-item {
  display: block;
  font-size: 13px;
  font-weight: var(--fw-medium);
  color: var(--fg-4);
  padding: 5px 10px;
  border-radius: var(--r-md);
  transition: background var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}

.year-nav-item:hover {
  background: var(--brand-100);
  color: var(--fg-1);
}

.year-nav-item.active {
  background: var(--brand-100);
  color: var(--brand-primary);
}

/* ── Three-column timeline grid: date | gutter | content ── */
.changelog-timeline {
  display: grid;
  grid-template-columns: 148px 40px 1fr;
}

/* Date column */
.cl-date-col {
  padding-top: 6px;
  padding-right: 24px;
  text-align: right;
}

.cl-date {
  font-size: 13px;
  font-weight: var(--fw-medium);
  color: var(--fg-4);
  white-space: nowrap;
  position: sticky;
  top: 96px;
  display: inline-block;
}

.cl-latest-badge {
  display: block;
  margin-top: 6px;
  margin-left: auto;
  width: fit-content;
  background: var(--brand-100);
  color: var(--brand-primary);
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: var(--r-pill);
}

/* Gutter column: dot + vertical line */
.cl-gutter {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cl-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-2);
  border: 2px solid var(--bg-app);
  box-shadow: 0 0 0 2px var(--border-2);
  flex-shrink: 0;
  margin-top: 8px;
  z-index: 1;
}

.cl-dot.latest {
  background: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(0, 0, 198, 0.18);
}

.cl-line {
  width: 1px;
  flex: 1;
  background: var(--border-1);
  margin-top: 6px;
}

.cl-line.last {
  background: transparent;
}

/* Content column */
.cl-content {
  padding-left: 32px;
  padding-bottom: 80px;
}

.cl-title {
  font-size: 26px;
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--fg-1);
  margin: 0 0 20px;
}

.cl-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease-out);
}

.cl-title a:hover {
  color: var(--brand-primary);
}

.cl-screenshot {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--r-xl);
  border: 1px solid var(--border-1);
  overflow: hidden;
  margin-bottom: 24px;
  box-shadow: var(--shadow-md);
  display: block;
}

.cl-screenshot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cl-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg-3);
  margin: 0 0 28px;
  max-width: 620px;
}

/* Improvements / Fixes sections */
.cl-sections {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.cl-section-label {
  font-size: 11px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 10px;
}

.cl-section-label.improvements { color: var(--emerald-600); }
.cl-section-label.fixes        { color: var(--orange-600); }

.cl-section-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.improvements .cl-section-dot { background: var(--success); }
.fixes        .cl-section-dot { background: var(--warning); }

.cl-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.cl-list li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--fg-3);
  padding-left: 20px;
  position: relative;
}

.cl-list li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--fg-4);
}

.cl-list li strong {
  color: var(--fg-1);
  font-weight: var(--fw-semibold);
}

/* Pagination row — aligns with content column */
.cl-pagination {
  display: grid;
  grid-template-columns: 148px 40px 1fr; /* mirrors .changelog-timeline columns for visual alignment */
  padding-top: 8px;
}

.cl-pagination-content {
  padding-left: 32px;
}

.btn-older {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: var(--fw-medium);
  color: var(--fg-3);
  border: 1px solid var(--border-1);
  background: var(--bg-app);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out);
}

.btn-older:hover {
  background: var(--brand-100);
  color: var(--brand-primary);
  border-color: var(--brand-primary);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .changelog-outer {
    grid-template-columns: 1fr;
    padding-top: 48px;
  }

  .changelog-sidebar {
    display: none;
  }

  .changelog-timeline {
    grid-template-columns: 1fr;
  }

  .cl-date-col {
    text-align: left;
    padding-right: 0;
    padding-bottom: 6px;
  }

  .cl-date {
    position: static;
  }

  .cl-gutter {
    display: none;
  }

  .cl-content {
    padding-left: 0;
  }

  .cl-pagination {
    grid-template-columns: 1fr;
  }

  .cl-pagination-content {
    padding-left: 0;
  }
}

@media (max-width: 720px) {
  .changelog-outer {
    padding: 40px 20px 80px;
  }

  .cl-title {
    font-size: 22px;
  }
}