/* =================================================================
   GIA PHẢ HỌ NGUYỄN — DESIGN SYSTEM
   Bảng màu, font, layout dùng chung cho toàn bộ trang.
   Xem chi tiết quy ước trong CLAUDE.md mục "Design system".
   ================================================================= */

:root {
  /* Bảng màu */
  --color-maroon: #7a1f2b;       /* đỏ đô - màu chính */
  --color-maroon-dark: #5c1620;
  --color-gold: #c9a227;         /* vàng đồng - màu nhấn */
  --color-gold-light: #e7cf7a;
  --color-cream: #f7f3e9;        /* nền kem ngà */
  --color-cream-soft: #fbf9f3;
  --color-ink: #2b1d12;          /* chữ nâu sẫm */
  --color-ink-soft: #5b4a36;
  --color-border: #e3d6b8;
  --color-white: #ffffff;

  /* Typography */
  --font-heading: "Playfair Display", "Noto Serif", Georgia, serif;
  --font-body: "Noto Sans", "Segoe UI", Arial, sans-serif;

  /* Layout */
  --max-width: 1140px;
  --radius: 6px;
  --shadow: 0 4px 16px rgba(43, 29, 18, 0.08);
  --shadow-lift: 0 8px 24px rgba(43, 29, 18, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-cream);
  line-height: 1.65;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-maroon);
  text-decoration: none;
}

a:hover {
  color: var(--color-gold);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-maroon-dark);
  margin: 0 0 0.5em;
  line-height: 1.25;
}

p {
  margin: 0 0 1em;
}

ul {
  margin: 0;
  padding: 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Ornamental divider ---------- */
.ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: var(--color-gold);
  margin: 18px 0 32px;
  font-size: 14px;
  letter-spacing: 0.3em;
}
.ornament::before,
.ornament::after {
  content: "";
  height: 1px;
  width: 60px;
  background: linear-gradient(90deg, transparent, var(--color-gold));
}
.ornament::after {
  background: linear-gradient(90deg, var(--color-gold), transparent);
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-maroon);
  border-bottom: 3px solid var(--color-gold);
  box-shadow: var(--shadow);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-cream);
  font-family: var(--font-heading);
}

.brand-emblem {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-gold);
  color: var(--color-maroon-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  flex-shrink: 0;
}

.brand-text .brand-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-cream);
}

.brand-text .brand-sub {
  font-size: 11px;
  color: var(--color-gold-light);
  letter-spacing: 0.08em;
}

.brand:hover .brand-text .brand-title,
.brand:hover {
  color: var(--color-gold-light);
}

.nav-menu {
  display: flex;
  gap: 4px;
  list-style: none;
}

.nav-menu a {
  display: block;
  padding: 10px 14px;
  color: var(--color-cream);
  font-size: 14.5px;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s;
}

.nav-menu a:hover,
.nav-menu a.active {
  background: rgba(201, 162, 39, 0.18);
  color: var(--color-gold-light);
}

.nav-toggle {
  display: none;
  background: none;
  border: 2px solid var(--color-gold);
  border-radius: var(--radius);
  color: var(--color-cream);
  font-size: 20px;
  padding: 6px 10px;
  cursor: pointer;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: block;
  }
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-maroon-dark);
    padding: 8px;
    gap: 2px;
    display: none;
    border-bottom: 3px solid var(--color-gold);
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-bar {
    position: relative;
  }
}

/* ---------- Hero ---------- */
.hero {
  background:
    linear-gradient(160deg, rgba(122,31,43,0.88) 0%, rgba(92,22,32,0.92) 100%),
    url("../img/banner-dong-ho-nguyen.jpg") center center / cover no-repeat;
  color: var(--color-cream);
  padding: 72px 24px 64px;
  text-align: center;
  position: relative;
  border-bottom: 4px solid var(--color-gold);
}

.hero-emblem {
  width: 84px;
  height: 84px;
  margin: 0 auto 20px;
  border-radius: 50%;
  border: 2px solid var(--color-gold);
  background: rgba(201, 162, 39, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 700;
  color: var(--color-gold-light);
}

.hero h1 {
  color: var(--color-cream);
  font-size: clamp(28px, 4vw, 44px);
  margin-bottom: 10px;
}

.hero .hero-sub {
  color: var(--color-gold-light);
  font-size: 16px;
  letter-spacing: 0.06em;
  margin-bottom: 22px;
}

.hero .hero-desc {
  max-width: 680px;
  margin: 0 auto 28px;
  color: #f1e6d4;
}

.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 14.5px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}
.btn-gold {
  background: var(--color-gold);
  color: var(--color-maroon-dark);
}
.btn-outline {
  background: transparent;
  border-color: var(--color-gold);
  color: var(--color-cream);
}

/* ---------- Sections ---------- */
.section {
  padding: 64px 0;
}
.section-alt {
  background: var(--color-white);
}
.section-title {
  text-align: center;
  font-size: clamp(24px, 3vw, 32px);
}
.section-intro {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 8px;
  color: var(--color-ink-soft);
}

/* ---------- Stats ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 36px;
}
.stat-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 12px;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-card .stat-number {
  font-family: var(--font-heading);
  font-size: 32px;
  color: var(--color-maroon);
  font-weight: 700;
}
.stat-card .stat-label {
  font-size: 13.5px;
  color: var(--color-ink-soft);
  margin-top: 4px;
}

@media (max-width: 700px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Cards grid (news / members) ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 22px;
  margin-top: 32px;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.18s, box-shadow 0.18s;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}
.card-body {
  padding: 18px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.card-tag {
  display: inline-block;
  align-self: flex-start;
  background: var(--color-cream);
  color: var(--color-maroon);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
  border: 1px solid var(--color-border);
}
.card h3 {
  font-size: 18px;
  margin-bottom: 6px;
}
.card p {
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 12px;
}
.card-meta {
  font-size: 12.5px;
  color: var(--color-gold);
  font-weight: 700;
  margin-top: auto;
}

/* ---------- Member card (avatar style) ---------- */
.member-card {
  text-align: center;
  padding: 24px 16px;
}
.member-avatar {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  margin: 0 auto 14px;
  border: 3px solid var(--color-gold-light);
  overflow: hidden;
  background: var(--color-cream);
}
.member-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.member-card h3 {
  font-size: 16.5px;
  margin-bottom: 2px;
}
.member-card .member-title {
  font-size: 12.5px;
  color: var(--color-gold);
  font-weight: 700;
  margin-bottom: 6px;
}
.member-card .member-years {
  font-size: 13px;
  color: var(--color-ink-soft);
}
.member-card .member-gen-badge {
  display: inline-block;
  margin-top: 10px;
  font-size: 11.5px;
  background: var(--color-maroon);
  color: var(--color-cream);
  padding: 3px 10px;
  border-radius: 20px;
}

/* ---------- Filters / search bar ---------- */
.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin: 28px 0 6px;
}
.filter-bar input[type="text"],
.filter-bar select {
  font-family: var(--font-body);
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
  font-size: 14.5px;
  color: var(--color-ink);
  min-width: 200px;
}
.filter-bar input[type="text"]:focus,
.filter-bar select:focus {
  outline: 2px solid var(--color-gold);
}

/* ---------- Timeline (lich-su.html) ---------- */
.timeline {
  position: relative;
  margin: 40px auto 0;
  max-width: 760px;
  padding-left: 28px;
  border-left: 3px solid var(--color-gold-light);
}
.timeline-item {
  position: relative;
  padding-bottom: 32px;
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -38px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-maroon);
}
.timeline-year {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-maroon);
  font-size: 18px;
}
.timeline-item p {
  color: var(--color-ink-soft);
  margin-top: 4px;
}

/* ---------- Family tree (gia-pha.html) ---------- */
.tree-toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  margin: 28px 0 10px;
}

.tree-wrapper {
  overflow-x: auto;
  padding: 30px 10px 50px;
}

.tree {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: max-content;
  margin: 0 auto;
}

.tree-generation {
  display: flex;
  justify-content: center;
}

.tree-node-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 14px;
}

/* Bọc riêng cặp vợ chồng + nút mở/thu gọn, tách khỏi khối con cháu,
   để nút toggle luôn nằm ngay dưới cặp đôi này (không bị đẩy xuống
   đáy của toàn bộ nhánh con khi nhánh có nhiều đời). */
.tree-couple-wrap {
  position: relative;
}

.tree-children {
  display: flex;
  position: relative;
  padding-top: 36px;
}

.tree-children::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 18px;
  background: var(--color-gold);
}

.tree-couple {
  display: flex;
  align-items: center;
  gap: 6px;
  position: relative;
}

.tree-node {
  width: 132px;
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 8px 8px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
  position: relative;
}
.tree-node:hover {
  border-color: var(--color-gold);
  transform: translateY(-3px);
}
.tree-node.male {
  border-top: 4px solid var(--color-maroon);
}
.tree-node.female {
  border-top: 4px solid #b06a8a;
}
.tree-node .tn-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  margin: 0 auto 6px;
  overflow: hidden;
  background: var(--color-cream);
}
.tree-node .tn-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.tree-node .tn-name {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.3;
}
.tree-node .tn-years {
  font-size: 10.5px;
  color: var(--color-ink-soft);
  margin-top: 2px;
}
.tree-node .tn-title {
  font-size: 10px;
  color: var(--color-gold);
  font-weight: 700;
  margin-top: 2px;
}

.tree-spouse-link {
  width: 18px;
  height: 2px;
  background: var(--color-gold);
}

.tree-toggle {
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-maroon);
  color: var(--color-cream);
  font-size: 13px;
  line-height: 20px;
  text-align: center;
  cursor: pointer;
  border: 2px solid var(--color-cream);
  z-index: 2;
}

/* connector wrapper for multiple children */
.tree-row-connector {
  display: flex;
  justify-content: center;
  position: relative;
}
.tree-row-connector::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-gold);
}

/* ---------- Detail page ---------- */
.detail-hero {
  display: flex;
  gap: 28px;
  align-items: center;
  flex-wrap: wrap;
}
.detail-avatar {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  border: 4px solid var(--color-gold-light);
  overflow: hidden;
  background: var(--color-cream);
  flex-shrink: 0;
}
.detail-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.detail-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 28px 0;
}
.info-row {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 16px;
}
.info-row .info-label {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gold);
  font-weight: 700;
}
.info-row .info-value {
  font-size: 15px;
  margin-top: 3px;
}
.info-row .info-value a {
  font-weight: 700;
}
.relation-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}
.relation-chip {
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 13.5px;
  font-weight: 600;
}
@media (max-width: 600px) {
  .detail-info-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Calendar page ---------- */
.cal-table-wrapper {
  overflow-x: auto;
  margin-top: 24px;
}
table.cal-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  box-shadow: var(--shadow);
}
table.cal-table th,
table.cal-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  font-size: 14.5px;
}
table.cal-table th {
  background: var(--color-maroon);
  color: var(--color-cream);
  font-family: var(--font-heading);
  font-weight: 700;
}
table.cal-table tr:hover td {
  background: var(--color-cream-soft);
}
.cal-month-heading {
  margin-top: 36px;
  font-size: 18px;
  color: var(--color-maroon);
  border-bottom: 2px solid var(--color-gold-light);
  padding-bottom: 6px;
}
.tag-pill {
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  color: var(--color-white);
}
.tag-pill.gio-to { background: var(--color-maroon); }
.tag-pill.chap-mo { background: #6b5b3e; }
.tag-pill.cung-dat { background: #7a8b3e; }
.tag-pill.hop-ho { background: #2f6f76; }
.tag-pill.gio-ca-nhan { background: var(--color-gold); color: var(--color-ink); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-maroon-dark);
  color: var(--color-cream);
  padding: 48px 0 24px;
  margin-top: 40px;
  border-top: 4px solid var(--color-gold);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
}
.footer-grid h4 {
  color: var(--color-gold-light);
  font-size: 15px;
}
.footer-grid p, .footer-grid a {
  font-size: 13.5px;
  color: #e6d9bf;
}
.footer-grid ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-bottom {
  text-align: center;
  font-size: 12.5px;
  color: #c8b896;
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid rgba(201,162,39,0.25);
}
@media (max-width: 760px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Empty state ---------- */
.empty-state {
  text-align: center;
  padding: 40px 0;
  color: var(--color-ink-soft);
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: 13.5px;
  color: var(--color-ink-soft);
  margin-bottom: 18px;
}
.breadcrumb a {
  font-weight: 600;
}

/* ---------- Page header (non-hero pages) ---------- */
.page-header {
  background: linear-gradient(160deg, var(--color-maroon) 0%, var(--color-maroon-dark) 100%);
  color: var(--color-cream);
  padding: 46px 24px;
  text-align: center;
  border-bottom: 4px solid var(--color-gold);
}
.page-header h1 {
  color: var(--color-cream);
  margin-bottom: 8px;
}
.page-header p {
  color: var(--color-gold-light);
  margin: 0;
}