/* ===== Gia phả họ Phạm Nguyễn – phong cách cổ trang ===== */
:root {
  --paper: #f3e7cc;
  --paper-2: #ead9b5;
  --paper-3: #e0c999;
  --ink: #2b1d14;
  --ink-2: #5a4330;
  --ink-3: #8a6f55;
  --cinnabar: #a3281f;
  --cinnabar-2: #7e1c15;
  --gold: #b08a3e;
  --gold-2: #d6b46a;
  --jade: #3f5d4c;
  --line: rgba(90, 60, 30, 0.25);
  --shadow: 0 10px 30px -12px rgba(60, 30, 10, 0.45);
  --radius: 10px;
  --font-body: "Noto Serif", "Times New Roman", serif;
  --font-display: "Cormorant Garamond", "Noto Serif", serif;
  --font-han: "Noto Serif TC", "Songti TC", "STSong", serif;
  --topbar-h: 64px;
  --reader-size: 1.06rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar-h) + 12px); }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  line-height: 1.7;
  background-color: var(--paper);
  background-image:
    radial-gradient(ellipse at 20% 10%, rgba(255, 250, 235, 0.7), transparent 60%),
    radial-gradient(ellipse at 80% 90%, rgba(176, 138, 62, 0.18), transparent 55%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.35 0 0 0 0 0.24 0 0 0 0 0.1 0 0 0 0.09 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
body.no-scroll { overflow: hidden; }
a { color: var(--cinnabar); text-decoration: none; }
a:hover { text-decoration: underline; }
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.muted { color: var(--ink-3); }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--cinnabar); outline-offset: 2px; }

/* ===== Con dấu ===== */
.seal {
  display: inline-grid;
  place-items: center;
  font-family: var(--font-han);
  color: #f8ecd4;
  background: var(--cinnabar);
  border-radius: 6px;
  box-shadow: inset 0 0 0 2px rgba(255, 235, 210, 0.35), inset 0 0 12px rgba(0, 0, 0, 0.25);
  position: relative;
}
.seal::after { /* vết mực không đều */
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='1.2' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 0.92 0 0 0 0 0.82 0 0 0 1.8 -1.2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: screen;
  opacity: 0.35;
  pointer-events: none;
}
.seal--sm { width: 38px; height: 38px; font-size: 1.35rem; }
.seal--lg {
  width: 108px; height: 108px;
  grid-template-columns: 1fr 1fr;
  padding: 10px; gap: 2px;
  font-size: 2.05rem; line-height: 1;
  transform: rotate(-4deg);
  margin-bottom: 1.25rem;
}
.seal--lg span:nth-child(1) { order: 2; } /* đọc từ phải sang trái, trên xuống dưới */
.seal--lg span:nth-child(2) { order: 4; }
.seal--lg span:nth-child(3) { order: 1; }
.seal--lg span:nth-child(4) { order: 3; }

/* ===== Nút ===== */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.05rem; letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s, box-shadow 0.2s, color 0.2s;
  text-decoration: none !important;
}
.btn:active { transform: translateY(1px); }
.btn--seal { background: var(--cinnabar); color: #fbf0dc; box-shadow: 0 6px 16px -8px var(--cinnabar-2); }
.btn--seal:hover { background: var(--cinnabar-2); }
.btn--ghost { border-color: var(--gold); color: var(--ink); background: rgba(255, 250, 235, 0.4); }
.btn--ghost:hover { background: rgba(176, 138, 62, 0.15); }
.btn--sm { padding: 0.3rem 0.8rem; font-size: 0.95rem; }
.icon-btn {
  display: inline-grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255, 250, 235, 0.5);
  cursor: pointer;
  transition: background 0.2s;
}
.icon-btn:hover { background: rgba(176, 138, 62, 0.2); }

/* ===== Thanh trên cùng ===== */
.topbar {
  position: sticky; top: 0; z-index: 50;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 1rem;
  padding: 0 clamp(1rem, 3vw, 2.5rem);
  background: rgba(243, 231, 204, 0.82);
  backdrop-filter: blur(10px) saturate(1.2);
  -webkit-backdrop-filter: blur(10px) saturate(1.2);
  border-bottom: 1px solid var(--line);
}
.topbar::after { /* viền hoa văn */
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 3px;
  background: repeating-linear-gradient(90deg, var(--gold) 0 10px, transparent 10px 14px);
  opacity: 0.45;
}
.brand { display: flex; align-items: center; gap: 0.65rem; color: var(--ink); text-decoration: none !important; }
.brand__text { font-family: var(--font-display); font-weight: 700; font-size: 1.35rem; line-height: 1; }
.brand__text small { display: block; font-size: 0.75rem; letter-spacing: 0.25em; text-transform: uppercase; color: var(--ink-3); margin-top: 3px; }
.nav { display: flex; gap: 0.25rem; margin-left: auto; }
.nav a {
  position: relative;
  padding: 0.4rem 0.8rem;
  color: var(--ink-2);
  font-family: var(--font-display); font-weight: 600; font-size: 1.1rem;
  text-decoration: none;
}
.nav a::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; width: 0; height: 2px;
  background: var(--cinnabar); transition: width 0.25s, left 0.25s;
}
.nav a:hover::after, .nav a.active::after { left: 20%; width: 60%; }
.nav a.active { color: var(--cinnabar); }
.topbar__actions { display: flex; align-items: center; gap: 0.5rem; }
.nav-toggle { display: none; }

.pdf-menu {
  position: absolute; right: clamp(1rem, 3vw, 2.5rem); top: calc(var(--topbar-h) - 4px);
  width: min(320px, calc(100vw - 2rem));
  padding: 0.6rem;
  background: var(--paper);
  border: 1px solid var(--gold);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  animation: pop 0.18s ease;
}
.pdf-menu__title { margin: 0.2rem 0.6rem 0.4rem; font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; }
.pdf-menu button {
  display: block; width: 100%; text-align: left;
  padding: 0.6rem 0.75rem;
  border: 0; border-radius: 8px; background: transparent; cursor: pointer;
}
.pdf-menu button:hover { background: rgba(163, 40, 31, 0.08); }
.pdf-menu button b { display: block; color: var(--cinnabar); }
.pdf-menu button span { font-size: 0.85rem; color: var(--ink-3); }
.pdf-menu__hint { font-size: 0.8rem; color: var(--ink-3); margin: 0.4rem 0.6rem 0.2rem; border-top: 1px dashed var(--line); padding-top: 0.5rem; }
@keyframes pop { from { opacity: 0; transform: translateY(-6px) scale(0.98); } }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: calc(100svh - var(--topbar-h));
  display: grid; place-items: center;
  padding: 3rem 1.25rem 4rem;
  text-align: center;
  overflow: hidden;
}
.hero::before { /* núi mây */
  content: ""; position: absolute; inset: auto 0 0 0; height: 42%;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320' preserveAspectRatio='none'%3E%3Cpath fill='%235a4330' fill-opacity='.08' d='M0 220 L120 150 L230 210 L360 90 L470 190 L560 140 L700 230 L820 120 L960 200 L1080 70 L1210 190 L1330 130 L1440 200 V320 H0Z'/%3E%3Cpath fill='%235a4330' fill-opacity='.12' d='M0 260 L160 200 L300 250 L430 180 L600 260 L760 190 L900 255 L1040 170 L1200 250 L1320 210 L1440 245 V320 H0Z'/%3E%3C/svg%3E") bottom / 100% 100% no-repeat;
  pointer-events: none;
}
.hero__inner { position: relative; max-width: 760px; animation: rise 0.9s ease both; }
.hero__eyebrow {
  margin: 0;
  font-family: var(--font-display); font-style: italic; font-size: 1.25rem; color: var(--ink-3);
  letter-spacing: 0.08em;
}
.hero__title {
  margin: 0.25rem 0 0.75rem;
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.8rem, 8vw, 5.4rem); line-height: 1.02;
  color: var(--ink);
}
.hero__title em {
  font-style: normal; color: var(--cinnabar);
  background: linear-gradient(transparent 70%, rgba(214, 180, 106, 0.45) 70%);
  padding: 0 0.15em;
}
.hero__sub { font-size: 1.05rem; color: var(--ink-2); max-width: 560px; margin: 0 auto 1.75rem; }
.hero__stats { display: flex; justify-content: center; gap: clamp(1.25rem, 5vw, 3rem); margin-bottom: 2rem; }
.hero__stats div { display: flex; flex-direction: column; align-items: center; }
.hero__stats b { font-family: var(--font-display); font-size: 2.4rem; line-height: 1; color: var(--cinnabar); }
.hero__stats span { font-size: 0.82rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-3); }
.hero__cta { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }
.hero__quote {
  margin: 2.5rem auto 0; max-width: 600px;
  font-family: var(--font-display); font-style: italic; font-size: 1.25rem; line-height: 1.5;
  color: var(--ink-2);
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.hero__quote cite { display: block; margin-top: 0.5rem; font-size: 0.95rem; font-style: normal; color: var(--ink-3); }
.hero__couplet {
  position: absolute; top: 50%; transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: var(--font-han); font-size: clamp(1.5rem, 2.6vw, 2.2rem); letter-spacing: 0.4em;
  color: var(--cinnabar);
  padding: 1.5rem 0.65rem;
  background: linear-gradient(180deg, rgba(163, 40, 31, 0.1), rgba(163, 40, 31, 0.04));
  border: 1px solid rgba(163, 40, 31, 0.3);
  border-radius: 4px;
  opacity: 0.85;
}
.hero__couplet--left { left: clamp(1rem, 5vw, 5rem); }
.hero__couplet--right { right: clamp(1rem, 5vw, 5rem); }
.hero__scroll { position: absolute; bottom: 1.25rem; left: 50%; transform: translateX(-50%); }
.hero__scroll span {
  display: block; width: 22px; height: 36px; border: 2px solid var(--ink-3); border-radius: 12px; position: relative;
}
.hero__scroll span::after {
  content: ""; position: absolute; left: 50%; top: 7px; width: 4px; height: 7px; margin-left: -2px;
  border-radius: 2px; background: var(--cinnabar); animation: wheel 1.6s infinite;
}
@keyframes wheel { to { transform: translateY(12px); opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(18px); } }

/* ===== Section ===== */
.section { padding: clamp(3.5rem, 8vw, 6rem) clamp(1rem, 4vw, 3rem); max-width: 1240px; margin: 0 auto; }
.section__head { text-align: center; margin-bottom: 2.5rem; position: relative; }
.section__han {
  display: block;
  font-family: var(--font-han); font-size: 1.05rem; letter-spacing: 0.6em; padding-left: 0.6em;
  color: var(--cinnabar); opacity: 0.85;
}
.section__head h2 {
  margin: 0.2rem 0 0.4rem;
  font-family: var(--font-display); font-size: clamp(2rem, 4.5vw, 3rem); line-height: 1.1;
}
.section__head h2::after {
  content: ""; display: block; width: 140px; height: 14px; margin: 0.7rem auto 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 140 14'%3E%3Cg fill='none' stroke='%23b08a3e' stroke-width='1.4'%3E%3Cpath d='M0 7h52M88 7h52'/%3E%3Cpath d='M70 1l6 6-6 6-6-6z' fill='%23a3281f' stroke='none'/%3E%3Ccircle cx='57' cy='7' r='2'/%3E%3Ccircle cx='83' cy='7' r='2'/%3E%3C/g%3E%3C/svg%3E") center / contain no-repeat;
}
.section__head p { margin: 0; color: var(--ink-3); }

/* Thẻ cuộn giấy */
.origin { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem; }
.scroll-card {
  position: relative;
  padding: 1.75rem 1.5rem 1.5rem;
  background: linear-gradient(180deg, rgba(255, 250, 235, 0.75), rgba(234, 217, 181, 0.6));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.scroll-card::before, .scroll-card::after { /* trục cuộn */
  content: ""; position: absolute; left: -6px; right: -6px; height: 8px; border-radius: 4px;
  background: linear-gradient(180deg, #8b5a2b, #5b3a1a);
}
.scroll-card::before { top: -4px; }
.scroll-card::after { bottom: -4px; }
.scroll-card__num {
  position: absolute; top: 0.9rem; right: 1rem;
  font-family: var(--font-han); font-size: 1.6rem; color: var(--cinnabar); opacity: 0.25;
}
.scroll-card h3 { margin: 0 0 0.5rem; font-family: var(--font-display); font-size: 1.5rem; color: var(--cinnabar-2); }
.scroll-card p { margin: 0; font-size: 0.97rem; color: var(--ink-2); }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== Phả đồ ===== */
.tree-tools {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem;
  margin-bottom: 1.5rem; padding: 0.75rem 1rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: rgba(255, 250, 235, 0.45);
}
.switch { display: inline-flex; align-items: center; gap: 0.6rem; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch__track { width: 42px; height: 24px; border-radius: 12px; background: var(--paper-3); position: relative; transition: background 0.2s; }
.switch__track::after {
  content: ""; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%;
  background: #fff8ea; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3); transition: transform 0.2s;
}
.switch input:checked + .switch__track { background: var(--cinnabar); }
.switch input:checked + .switch__track::after { transform: translateX(18px); }
.switch input:focus-visible + .switch__track { outline: 2px solid var(--cinnabar); outline-offset: 2px; }
.gen-jump { display: flex; align-items: center; gap: 0.5rem; min-width: 0; }
.gen-jump > span { white-space: nowrap; }
.gen-jump select {
  font: inherit; padding: 0.35rem 0.6rem; border-radius: 8px;
  border: 1px solid var(--gold); background: var(--paper); color: var(--ink);
}

.tree-layout { display: grid; grid-template-columns: 64px 1fr; gap: 1.5rem; align-items: start; }
.gen-rail {
  position: sticky; top: calc(var(--topbar-h) + 16px);
  list-style: none; margin: 0; padding: 0.4rem 0;
  display: flex; flex-direction: column; gap: 2px;
  max-height: calc(100vh - var(--topbar-h) - 32px); overflow-y: auto; scrollbar-width: none;
}
.gen-rail::-webkit-scrollbar { display: none; }
.gen-rail button {
  width: 100%; padding: 0.15rem 0; border: 0; background: none; cursor: pointer;
  font-family: var(--font-display); font-weight: 700; font-size: 0.95rem; color: var(--ink-3);
  border-right: 2px solid var(--line); text-align: center;
  transition: color 0.2s, border-color 0.2s;
}
.gen-rail button:hover { color: var(--ink); }
.gen-rail button.active { color: var(--cinnabar); border-right-color: var(--cinnabar); }

.tree { position: relative; padding-left: 0; }
.gen-row {
  position: relative;
  display: grid; grid-template-columns: 96px 1fr; gap: 1.25rem;
  padding-bottom: 2.25rem;
}
.gen-row::before { /* đường nối giữa các đời */
  content: ""; position: absolute; left: 47px; top: 64px; bottom: 0; width: 2px;
  background: linear-gradient(180deg, var(--cinnabar), var(--gold));
  opacity: 0.55;
}
.gen-row:last-child::before { display: none; }
.gen-badge {
  position: relative; z-index: 1;
  width: 96px; height: 64px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: var(--paper);
  border: 1px solid var(--gold);
  border-radius: 8px;
  box-shadow: inset 0 0 0 3px var(--paper), inset 0 0 0 4px rgba(176, 138, 62, 0.45);
}
.gen-badge b { font-family: var(--font-display); font-size: 1.7rem; line-height: 1; color: var(--cinnabar); }
.gen-badge span { font-family: var(--font-han); font-size: 0.72rem; color: var(--ink-3); letter-spacing: 0.15em; margin-top: 2px; }
.gen-body { min-width: 0; }

.person {
  display: grid; grid-template-columns: auto 1fr auto; gap: 1rem; align-items: center;
  width: 100%;
  padding: 0.95rem 1.15rem;
  text-align: left;
  background: linear-gradient(120deg, rgba(255, 250, 235, 0.9), rgba(234, 217, 181, 0.75));
  border: 1px solid var(--gold);
  border-left: 4px solid var(--cinnabar);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s;
}
.person:hover { transform: translateY(-2px); box-shadow: 0 16px 32px -14px rgba(60, 30, 10, 0.55); }
.person.selected { border-color: var(--cinnabar); box-shadow: 0 0 0 3px rgba(163, 40, 31, 0.18), var(--shadow); }
.person__mono {
  width: 52px; height: 52px; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 700; font-size: 1.5rem;
  color: #fbf0dc;
  background: radial-gradient(circle at 35% 30%, #c0463b, var(--cinnabar-2));
  box-shadow: inset 0 0 0 2px rgba(255, 235, 210, 0.4);
}
.person__name { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: 1.45rem; line-height: 1.15; color: var(--ink); }
.person__meta { margin: 0.15rem 0 0; font-size: 0.9rem; color: var(--ink-2); }
.person__meta i { color: var(--ink-3); font-style: normal; }
.person__role {
  display: inline-block; margin-top: 0.35rem; padding: 0.05rem 0.55rem;
  font-size: 0.76rem; letter-spacing: 0.04em;
  color: var(--jade); border: 1px solid rgba(63, 93, 76, 0.4); border-radius: 999px;
}
.person__arrow { color: var(--ink-3); }

.siblings { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.7rem; padding-left: 0.25rem; }
.tree.hide-branches .siblings { display: none; }
.siblings__label { width: 100%; font-size: 0.78rem; color: var(--ink-3); letter-spacing: 0.06em; text-transform: uppercase; }
.chip {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.18rem 0.65rem;
  font-size: 0.86rem;
  border: 1px dashed var(--ink-3);
  border-radius: 999px;
  background: rgba(255, 250, 235, 0.5);
  color: var(--ink-2);
}
.chip--f { border-color: rgba(163, 40, 31, 0.45); }
.chip--f::before { content: "♀"; color: var(--cinnabar); font-size: 0.8em; }
.chip small { color: var(--ink-3); }

/* ===== Biên niên ===== */
.timeline { list-style: none; margin: 0 auto; padding: 0; max-width: 900px; position: relative; }
.timeline::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; margin-left: -1px; background: linear-gradient(var(--gold), var(--cinnabar), var(--gold)); opacity: 0.6; }
.tl-item { position: relative; width: 50%; padding: 0 2.5rem 2rem 0; text-align: right; }
.tl-item:nth-child(even) { margin-left: 50%; padding: 0 0 2rem 2.5rem; text-align: left; }
.tl-item::before {
  content: ""; position: absolute; top: 0.55rem; right: -9px; width: 14px; height: 14px;
  background: var(--paper); border: 3px solid var(--cinnabar); transform: rotate(45deg);
}
.tl-item:nth-child(even)::before { right: auto; left: -9px; }
.tl-year { font-family: var(--font-display); font-weight: 700; font-size: 1.9rem; line-height: 1; color: var(--cinnabar); }
.tl-title { margin: 0.25rem 0 0.15rem; font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; }
.tl-text { margin: 0; color: var(--ink-2); font-size: 0.95rem; }
.tl-link { display: inline-block; margin-top: 0.3rem; font-size: 0.85rem; background: none; border: 0; padding: 0; color: var(--cinnabar); cursor: pointer; }
.tl-link:hover { text-decoration: underline; }

/* ===== Di sản ===== */
.works { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; }
.work-card {
  padding: 1.4rem 1.4rem 1.2rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: rgba(255, 250, 235, 0.55);
  position: relative; overflow: hidden;
}
.work-card::before {
  content: attr(data-han);
  position: absolute; right: -0.2rem; bottom: -1.4rem;
  font-family: var(--font-han); font-size: 6rem; color: var(--cinnabar); opacity: 0.06; pointer-events: none;
}
.work-card h3 { margin: 0; font-family: var(--font-display); font-size: 1.4rem; }
.work-card p { margin: 0.1rem 0 0.75rem; font-size: 0.85rem; color: var(--ink-3); }
.work-card ul { margin: 0; padding: 0; list-style: none; }
.work-card li { padding: 0.3rem 0 0.3rem 1.2rem; border-top: 1px dashed var(--line); position: relative; font-style: italic; }
.work-card li::before { content: "❖"; position: absolute; left: 0; color: var(--gold); font-style: normal; font-size: 0.8rem; top: 0.45rem; }

/* ===== Toàn văn ===== */
.reader { display: grid; grid-template-columns: 260px 1fr; gap: 2rem; align-items: start; }
.reader__toc {
  position: sticky; top: calc(var(--topbar-h) + 16px);
  max-height: calc(100vh - var(--topbar-h) - 32px); overflow-y: auto;
  padding: 1rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: rgba(255, 250, 235, 0.55);
}
.reader__toc-title { margin: 0 0 0.5rem; font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; }
.reader__toc ol { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
.reader__toc li { counter-increment: toc; }
.reader__toc a {
  display: block; padding: 0.3rem 0.5rem; border-radius: 6px;
  font-size: 0.9rem; color: var(--ink-2); text-decoration: none;
}
.reader__toc a::before { content: counter(toc, cjk-ideographic) "　"; color: var(--gold); font-family: var(--font-han); font-size: 0.8rem; }
.reader__toc a:hover, .reader__toc a.active { background: rgba(163, 40, 31, 0.08); color: var(--cinnabar); }
.reader__bar {
  position: sticky; top: calc(var(--topbar-h) + 8px); z-index: 5;
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.5rem 0.75rem; margin-bottom: 1rem;
  background: rgba(243, 231, 204, 0.92);
  border: 1px solid var(--line); border-radius: 999px;
  backdrop-filter: blur(6px);
}
#toc-toggle { display: none; }
.reader__progress { flex: 1; height: 4px; border-radius: 2px; background: var(--paper-3); overflow: hidden; }
.reader__progress span { display: block; height: 100%; width: 0; background: var(--cinnabar); transition: width 0.1s linear; }

.paper {
  position: relative;
  padding: clamp(1.5rem, 5vw, 3.5rem) clamp(1.25rem, 5vw, 4rem);
  background: #f8eed8;
  border: 1px solid var(--gold);
  border-radius: 4px;
  box-shadow: var(--shadow), inset 0 0 60px rgba(176, 138, 62, 0.18);
  font-size: var(--reader-size);
  line-height: 1.85;
}
.paper::before { /* khung kép */
  content: ""; position: absolute; inset: 10px; border: 1px solid rgba(176, 138, 62, 0.5); pointer-events: none;
}
.paper p { margin: 0 0 1em; text-align: justify; hyphens: auto; }
.paper h1, .paper h2, .paper h3 { font-family: var(--font-display); color: var(--cinnabar-2); text-align: center; line-height: 1.25; margin: 2em 0 0.8em; }
.paper h1 { font-size: 2em; }
.paper h2 { font-size: 1.6em; }
.paper h3 { font-size: 1.35em; }
.paper h4, .paper h5, .paper h6 { font-size: 1em; font-weight: 600; margin: 0 0 1em; font-family: var(--font-body); color: var(--ink); }
.paper blockquote { margin: 0 0 1.2em; padding: 0.8em 1.2em; border-left: 3px solid var(--cinnabar); background: rgba(163, 40, 31, 0.05); font-style: italic; }
.paper blockquote p { margin: 0; text-align: left; }
.paper em { color: var(--ink-2); }
.paper sup { color: var(--cinnabar); font-size: 0.7em; }
.paper hr { border: 0; height: 14px; margin: 2em auto; width: 140px; background: inherit; }
.paper .anchor-target { scroll-margin-top: calc(var(--topbar-h) + 72px); }
.paper .flash { animation: flash 2.4s ease; }
@keyframes flash { 0%, 40% { background: rgba(214, 180, 106, 0.55); box-shadow: 0 0 0 6px rgba(214, 180, 106, 0.55); } 100% { background: transparent; box-shadow: 0 0 0 6px transparent; } }
mark { background: rgba(214, 180, 106, 0.6); color: inherit; padding: 0 2px; border-radius: 2px; }

/* ===== Bảng chi tiết ===== */
.drawer-backdrop { position: fixed; inset: 0; z-index: 60; background: rgba(43, 29, 20, 0.35); backdrop-filter: blur(2px); animation: fade 0.2s; }
.drawer {
  position: fixed; z-index: 61; top: 0; right: 0; bottom: 0;
  width: min(520px, 100vw);
  background: var(--paper);
  border-left: 1px solid var(--gold);
  box-shadow: -20px 0 40px -20px rgba(43, 29, 20, 0.5);
  transform: translateX(105%);
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.drawer.open { transform: none; }
.drawer__close { position: sticky; top: 0.75rem; float: right; margin: 0.75rem 0.75rem 0 0; z-index: 2; }
.drawer__content { padding: 1.75rem clamp(1.25rem, 4vw, 2rem) 2rem; }
.d-gen { font-family: var(--font-han); color: var(--cinnabar); letter-spacing: 0.3em; font-size: 0.95rem; }
.d-name { margin: 0.2rem 0 0; font-family: var(--font-display); font-size: 2.3rem; line-height: 1.05; }
.d-full { margin: 0.3rem 0 0; color: var(--ink-2); font-size: 1.05rem; }
.d-years { color: var(--ink-3); font-size: 0.9rem; }
.d-aliases { display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 0.75rem 0 0; }
.d-section { margin-top: 1.5rem; }
.d-section h4 {
  display: flex; align-items: center; gap: 0.6rem;
  margin: 0 0 0.5rem;
  font-family: var(--font-display); font-size: 1.2rem; color: var(--cinnabar-2);
}
.d-section h4::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.d-section p { margin: 0 0 0.6rem; }
.d-titles { font-style: italic; color: var(--ink-2); padding: 0.75rem 1rem; background: rgba(176, 138, 62, 0.1); border-radius: 8px; border-left: 3px solid var(--gold); }
.d-list { list-style: none; margin: 0; padding: 0; }
.d-list li { padding: 0.45rem 0; border-bottom: 1px dashed var(--line); }
.d-list li b { font-weight: 600; }
.d-list li small { display: block; color: var(--ink-3); }
.d-list .is-main b { color: var(--cinnabar); }
.d-list .is-main button { margin-left: 0.4rem; border: 0; background: none; color: var(--cinnabar); cursor: pointer; font-size: 0.85rem; text-decoration: underline; }
.d-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.75rem; }
.d-nav { display: flex; justify-content: space-between; gap: 0.5rem; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.d-nav button { flex: 1; }
.d-nav button[disabled] { opacity: 0.35; cursor: default; }

/* ===== Tìm kiếm ===== */
.modal { position: fixed; inset: 0; z-index: 70; display: grid; justify-items: center; align-items: start; padding: 10vh 1rem 1rem; background: rgba(43, 29, 20, 0.4); backdrop-filter: blur(3px); animation: fade 0.15s; }
.modal[hidden] { display: none; }
.modal__panel { width: min(640px, 100%); max-height: 75vh; display: flex; flex-direction: column; background: var(--paper); border: 1px solid var(--gold); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; animation: pop 0.2s ease; }
.search-box { display: flex; align-items: center; gap: 0.75rem; padding: 0.9rem 1.1rem; border-bottom: 1px solid var(--line); }
.search-box svg { color: var(--ink-3); flex: none; }
.search-box input { flex: 1; border: 0; background: none; font: inherit; font-size: 1.1rem; color: var(--ink); outline: none; min-width: 0; }
.search-box kbd { font-size: 0.75rem; padding: 0.1rem 0.4rem; border: 1px solid var(--line); border-radius: 4px; color: var(--ink-3); }
.search-results { overflow-y: auto; padding: 0.5rem; }
.search-results h5 { margin: 0.6rem 0.6rem 0.3rem; font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); }
.sr-item { display: block; width: 100%; text-align: left; padding: 0.6rem 0.75rem; border: 0; border-radius: 8px; background: none; cursor: pointer; }
.sr-item:hover, .sr-item.focus { background: rgba(163, 40, 31, 0.08); }
.sr-item b { display: block; font-family: var(--font-display); font-size: 1.15rem; }
.sr-item span { display: block; font-size: 0.86rem; color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.sr-empty { padding: 1.5rem; text-align: center; color: var(--ink-3); }

/* ===== Footer & toast ===== */
.footer { text-align: center; padding: 3rem 1rem 3.5rem; border-top: 1px solid var(--line); color: var(--ink-2); font-family: var(--font-display); font-size: 1.1rem; }
.footer p { margin: 0.6rem 0 0; }
.footer .muted { font-family: var(--font-body); font-size: 0.85rem; }
.toast {
  position: fixed; left: 50%; bottom: 1.5rem; z-index: 80;
  transform: translate(-50%, 150%);
  max-width: calc(100vw - 2rem);
  padding: 0.7rem 1.2rem;
  background: var(--ink); color: var(--paper);
  border-radius: 999px; font-size: 0.92rem;
  box-shadow: var(--shadow);
  opacity: 0; visibility: hidden;
  transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s;
}
.toast.show { transform: translate(-50%, 0); opacity: 1; visibility: visible; }
@keyframes fade { from { opacity: 0; } }

#print-root { display: none; }

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .reader { grid-template-columns: 1fr; }
  .reader__toc {
    position: fixed; z-index: 55; top: var(--topbar-h); left: 0; bottom: 0;
    width: min(300px, 85vw); max-height: none; border-radius: 0;
    background: var(--paper); box-shadow: var(--shadow);
    transform: translateX(-105%); transition: transform 0.3s ease;
  }
  .reader__toc.open { transform: none; }
  #toc-toggle { display: inline-flex; }
  .hero__couplet { display: none; }
}
@media (max-width: 820px) {
  .nav {
    position: absolute; top: var(--topbar-h); left: 0; right: 0;
    flex-direction: column; gap: 0;
    padding: 0.5rem 1rem 1rem;
    background: var(--paper);
    border-bottom: 1px solid var(--gold);
    box-shadow: var(--shadow);
    transform-origin: top; transform: scaleY(0); opacity: 0; pointer-events: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  .nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav a { padding: 0.75rem 0.5rem; border-bottom: 1px dashed var(--line); }
  .nav a::after { display: none; }
  .nav-toggle { display: inline-grid; }
  .topbar__actions { margin-left: auto; }
  .btn--seal span { display: none; }
  #btn-pdf { padding: 0.6rem; width: 40px; height: 40px; justify-content: center; }
  .hero__cta .btn--seal span { display: inline; }
}
@media (max-width: 640px) {
  :root { --topbar-h: 58px; }
  .brand__text small { display: none; }
  .tree-layout { grid-template-columns: 1fr; }
  .gen-rail { display: none; }
  .gen-row { grid-template-columns: 56px 1fr; gap: 0.75rem; }
  .gen-row::before { left: 27px; top: 52px; }
  .gen-badge { width: 56px; height: 52px; }
  .gen-badge b { font-size: 1.35rem; }
  .gen-badge span { font-size: 0.6rem; letter-spacing: 0; }
  .person { grid-template-columns: 1fr auto; padding: 0.8rem 0.9rem; }
  .person__mono { display: none; }
  .person__name { font-size: 1.25rem; }
  .timeline::before { left: 8px; }
  .tl-item, .tl-item:nth-child(even) { width: 100%; margin-left: 0; padding: 0 0 1.75rem 2.25rem; text-align: left; }
  .tl-item::before, .tl-item:nth-child(even)::before { left: 1px; right: auto; }
  .hero__stats b { font-size: 2rem; }
  .gen-jump { flex: 1; }
  .gen-jump select { flex: 1; min-width: 0; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* ===== In / Xuất PDF ===== */
@page { size: A4; margin: 18mm 16mm 20mm; }
@media print {
  html, body { background: #fff !important; }
  body > *:not(#print-root) { display: none !important; }
  #print-root { display: block !important; color: #1a120c; font-family: var(--font-body); font-size: 11pt; line-height: 1.6; }
  #print-root * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .pr-cover { height: 250mm; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; page-break-after: always; border: 3px double #b08a3e; padding: 20mm; }
  .pr-cover .seal--lg { margin-bottom: 12mm; }
  .pr-cover h1 { font-family: var(--font-display); font-size: 40pt; margin: 0; line-height: 1.1; }
  .pr-cover h1 em { font-style: normal; color: #a3281f; }
  .pr-cover p { margin: 4mm 0 0; color: #5a4330; }
  .pr-cover .pr-date { margin-top: 20mm; font-size: 10pt; color: #8a6f55; }
  .pr-h { font-family: var(--font-display); color: #7e1c15; text-align: center; font-size: 22pt; margin: 0 0 6mm; page-break-after: avoid; }
  .pr-h small { display: block; font-family: var(--font-han); font-size: 11pt; letter-spacing: 0.4em; color: #a3281f; }
  .pr-gen { page-break-inside: avoid; border-left: 3px solid #a3281f; padding: 2mm 0 2mm 5mm; margin: 0 0 5mm; }
  .pr-gen h3 { margin: 0; font-family: var(--font-display); font-size: 15pt; }
  .pr-gen h3 span { color: #a3281f; margin-right: 3mm; }
  .pr-gen p { margin: 1mm 0; }
  .pr-gen .pr-small { font-size: 9.5pt; color: #5a4330; }
  .pr-person h1 { font-family: var(--font-display); font-size: 28pt; margin: 0; }
  .pr-person h4 { font-family: var(--font-display); font-size: 14pt; color: #7e1c15; margin: 6mm 0 2mm; border-bottom: 1px solid #d6b46a; }
  .pr-person ul { margin: 0; padding-left: 5mm; }
  .pr-text { page-break-before: always; }
  .pr-text p { text-align: justify; margin: 0 0 3mm; orphans: 3; widows: 3; }
  .pr-text h1, .pr-text h2, .pr-text h3 { font-family: var(--font-display); color: #7e1c15; text-align: center; page-break-after: avoid; }
  .pr-text h4, .pr-text h5, .pr-text h6 { font-size: 11pt; font-weight: 600; margin: 0 0 3mm; }
  .pr-text blockquote { margin: 0 0 3mm; padding-left: 4mm; border-left: 2px solid #a3281f; font-style: italic; }
  .pr-text blockquote p { margin: 0; }
  .pr-foot { margin-top: 10mm; text-align: center; font-size: 9pt; color: #8a6f55; }
}