/* ============================================
   Dòng thời gian — 3 tab
   ============================================ */
body { background: var(--c-paper); }
.tlp-wrap { max-width: 1200px; margin: 0 auto; padding: 1.25rem 1.5rem 3rem; }
.tlp-title { text-align: center; font-family: var(--font-serif); font-size: clamp(1.8rem,4vw,2.8rem); color: var(--c-ink); letter-spacing: 0.04em; }
.tlp-sub { text-align: center; color: var(--c-ink-soft); margin: 0.3rem 0 1.2rem; }

.tlp-stats { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1.4rem; }
.tlp-stat { background: #fff; border: 1px solid var(--c-line); border-radius: 12px; padding: 0.7rem 1.4rem; display: flex; align-items: center; gap: 0.6rem; }
.tlp-stat i { color: var(--c-amber-dark); font-size: 1.2rem; }
.tlp-stat b { font-family: var(--font-serif); font-size: 1.5rem; color: var(--c-ink); }
.tlp-stat span { color: var(--c-ink-soft); font-size: 0.85rem; }

.tlp-tabs { display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1rem; }
.tlp-tabs a { border: 1px solid var(--c-line); background: #fff; color: var(--c-ink-soft); border-radius: 10px; padding: 0.6rem 1.3rem; font-weight: 600; display: inline-flex; gap: 0.5rem; align-items: center; }
.tlp-tabs a.on, .tlp-tabs a:hover { background: var(--c-amber-dark); border-color: var(--c-amber-dark); color: #fff; }

.tlp-filters { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center; background: #fff; border: 1px solid var(--c-line); border-radius: 12px; padding: 0.8rem 1rem; margin-bottom: 1.2rem; }
.tlp-flabel { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--c-ink-soft); }
.tlp-chip { border: 1px solid var(--c-line); background: #fff; color: var(--c-ink-soft); border-radius: 999px; padding: 0.35rem 0.85rem; font-size: 0.82rem; }
.tlp-chip.on, .tlp-chip:hover { background: var(--c-amber-dark); border-color: var(--c-amber-dark); color: #fff; }
.tlp-select { border: 1px solid var(--c-line); border-radius: 8px; padding: 0.5rem 0.8rem; font-family: inherit; background: #fff; min-width: 200px; }

.tlp-grid { display: grid; grid-template-columns: minmax(0,0.9fr) minmax(0,2fr); gap: 1.3rem; align-items: start; }
.tlp-panel { background: #fff; border: 1px solid var(--c-line); border-radius: 14px; padding: 1.3rem; }
.tlp-panel-h { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-serif); text-transform: uppercase; letter-spacing: 0.04em; color: var(--c-ink); font-size: 1rem; margin-bottom: 1rem; }
.tlp-panel-h i { color: var(--c-amber-dark); }

/* highlights (left) */
.hl { position: relative; padding-left: 2.6rem; }
.hl::before { content: ''; position: absolute; left: 1.1rem; top: 6px; bottom: 6px; width: 2px; background: var(--c-amber-light); }
.hl-item { position: relative; margin-bottom: 1.1rem; }
.hl-year { position: absolute; left: -2.6rem; top: 0; width: 2.2rem; text-align: center; font-family: var(--font-serif); font-weight: 700; color: var(--c-amber-dark); font-size: 0.82rem; background: #fff; border: 1px solid var(--c-amber-light); border-radius: 6px; padding: 0.15rem 0; }
.hl-title { font-weight: 700; color: var(--c-ink); font-size: 0.9rem; }
.hl-desc { color: var(--c-ink-soft); font-size: 0.8rem; line-height: 1.5; }

/* detailed timeline (right) */
.tl-sort { margin-left: auto; display: flex; align-items: center; gap: 0.5rem; }
.dt { position: relative; padding-left: 1.5rem; }
.dt::before { content: ''; position: absolute; left: 5px; top: 8px; bottom: 8px; width: 2px; background: var(--c-line); }
.dt-item { position: relative; display: grid; grid-template-columns: 72px 1fr auto; gap: 1rem; padding: 0.9rem 0; border-bottom: 1px dashed var(--c-line); align-items: start; }
.dt-item::before { content: ''; position: absolute; left: -1.5rem; top: 1.4rem; width: 12px; height: 12px; border-radius: 50%; background: var(--c-amber-dark); box-shadow: 0 0 0 3px #fff; }
.dt-year { font-family: var(--font-serif); font-weight: 700; color: var(--c-ink); font-size: 1.15rem; border: 1px solid var(--c-line); border-radius: 8px; text-align: center; padding: 0.3rem 0; background: var(--c-paper); }
.dt-body .t { font-weight: 700; color: var(--c-ink); }
.dt-body .who { font-size: 0.8rem; color: var(--c-amber-dark); }
.dt-body .d { color: var(--c-ink-soft); font-size: 0.88rem; line-height: 1.55; margin-top: 0.2rem; }
.dt-badges { margin-top: 0.4rem; display: flex; gap: 0.35rem; flex-wrap: wrap; }
.badge { font-size: 0.7rem; padding: 0.12rem 0.5rem; border-radius: 5px; background: var(--c-paper-2); color: var(--c-ink-soft); }
.badge.b-tg { background: rgba(184,131,52,0.18); color: var(--c-amber-dark); }
.dt-link { align-self: center; color: var(--c-amber-dark); font-size: 0.8rem; white-space: nowrap; }
.dt-link:hover { color: var(--c-amber); }

/* author hero (theo tác giả) */
.tlp-author { display: flex; gap: 1.3rem; background: #fff; border: 1px solid var(--c-amber-light); border-radius: 14px; padding: 1.3rem; margin-bottom: 1.2rem; align-items: center; }
.tlp-author .pic { width: 120px; height: 150px; border-radius: 10px; overflow: hidden; background: var(--c-paper-2); flex-shrink: 0; display: flex; align-items: center; justify-content: center; color: var(--c-amber-dark); font-size: 2.4rem; }
.tlp-author .pic img { width: 100%; height: 100%; object-fit: cover; filter: sepia(0.3); }
.tlp-author .nm { font-family: var(--font-serif); font-size: 1.8rem; color: var(--c-ink); }
.tlp-author .yr { color: var(--c-ink-soft); }
.tlp-author .tags { margin: 0.5rem 0; display: flex; gap: 0.4rem; flex-wrap: wrap; }
.tlp-author .tags span { font-size: 0.78rem; background: var(--c-paper-2); color: var(--c-amber-dark); padding: 0.2rem 0.6rem; border-radius: 6px; }
.tlp-author .meta { color: var(--c-ink-soft); font-size: 0.85rem; }
.tlp-author .go { margin-left: auto; }

/* related docs strip */
.tlp-related { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; margin-top: 1.3rem; }
.tlp-doc { display: flex; gap: 0.8rem; align-items: center; background: #fff; border: 1px solid var(--c-line); border-radius: 12px; padding: 0.8rem; }
.tlp-doc .th { width: 54px; height: 64px; border-radius: 7px; background: var(--c-paper-2); color: var(--c-amber-dark); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.tlp-doc .th img { width: 100%; height: 100%; object-fit: cover; border-radius: 7px; filter: sepia(0.3); }
.tlp-doc .nm { font-weight: 600; color: var(--c-ink); font-size: 0.9rem; }
.tlp-doc .go { color: var(--c-amber-dark); font-size: 0.8rem; }
.tlp-empty { text-align: center; color: var(--c-ink-soft); padding: 2rem; }

@media (max-width: 900px) { .tlp-grid { grid-template-columns: 1fr; } .tlp-related { grid-template-columns: 1fr; } }

/* hero decorations */
.tlp-hero { position: relative; }
.tlp-hero > * { position: relative; z-index: 1; }
.tlp-deco { position: absolute; top: -4px; width: 165px; opacity: 0.5; pointer-events: none; z-index: 0; }
.tlp-deco-l { left: -8px; }
.tlp-deco-r { right: -8px; }
@media (max-width: 1080px) { .tlp-deco { display: none; } }

/* colored badges (match mockup) */
.badge.b-gd { background: rgba(63,156,138,0.18); color: #2e7d6b; }   /* Gia đình - teal */
.badge.b-tl { background: rgba(138,90,156,0.18); color: #7a4a8c; }   /* Tư liệu - tím */
.badge.b-ls { background: rgba(63,120,168,0.18); color: #2f6b98; }   /* Lịch sử - xanh */
.badge.b-tg { background: rgba(192,122,42,0.20); color: #b0492e; }   /* Tác giả - cam */