/**
 * =========================================================================
 * DESIGN SYSTEM & CORE STYLES (PHONG CÁCH VIỆT NAM CAO CẤP & ĐẬM ĐÀ NGHỆ THUẬT)
 * Chuyện Tình Chúng Mình – Kỷ Niệm Ngày Cưới
 * =========================================================================
 */

:root {
  /* Bảng màu chủ đạo: Đỏ son sơn mài, Vàng kim thếp vàng, Trắng ngọc & Nâu gỗ trầm */
  --color-ivory: #FAF8F5;                  /* Trắng ngà ngọc trai */
  --color-warm-beige: #EDE5DB;             /* Be ấm mộc mạc */
  --color-champagne-gold: #C6A77D;         /* Vàng champagne */
  --color-champagne-gold-light: #E4D5BE;   /* Vàng nhạt hoàng gia */
  --color-champagne-gold-dark: #9F825C;    /* Vàng đồng cổ điển */
  --color-antique-gold: #B88B4A;           /* Vàng kim truyền thống */
  --color-vermilion-lacquer: #9E3D34;      /* Đỏ son sơn mài trầm ấm */
  --color-vermilion-soft: #F7EBE9;         /* Hồng đỏ cánh sen phớt nhẹ */
  --color-dusty-rose: #D9B8B0;             /* Hồng bụi tao nhã */
  --color-dusty-rose-light: #F0E3DF;
  --color-deep-brown: #382C26;             /* Nâu gỗ trầm hương */
  --color-soft-gray: #7D7873;              /* Xám sương mờ */
  --color-white: #FFFFFF;

  /* Gradient thếp vàng ánh kim sang trọng (Gold Leaf Foil) */
  --grad-gold-foil: linear-gradient(135deg, #BF953F 0%, #FCF6BA 25%, #B38728 50%, #FBF5B7 75%, #AA771C 100%);
  --grad-lacquer: linear-gradient(135deg, #A8443B 0%, #822E27 100%);

  /* Màu chức năng */
  --color-bg: var(--color-ivory);
  --color-surface: #FFFFFF;
  --color-surface-translucent: rgba(250, 248, 245, 0.92);
  --color-text-primary: var(--color-deep-brown);
  --color-text-secondary: var(--color-soft-gray);
  --color-text-light: #FAF8F5;
  --color-border: rgba(198, 167, 125, 0.32);
  --color-border-subtle: rgba(56, 44, 38, 0.08);

  /* Phông chữ */
  --font-serif-display: 'Playfair Display', Georgia, serif;
  --font-serif-body: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-script: 'Great Vibes', cursive;

  /* Bóng đổ */
  --shadow-sm: 0 2px 10px rgba(56, 44, 38, 0.04);
  --shadow-md: 0 10px 28px rgba(56, 44, 38, 0.07);
  --shadow-lg: 0 18px 48px rgba(56, 44, 38, 0.1);
  --shadow-gold: 0 10px 32px rgba(184, 139, 74, 0.2);
  --shadow-lacquer: 0 8px 24px rgba(158, 61, 52, 0.25);

  /* Bo góc */
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 9999px;

  /* Chuyển động */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* =========================================================================
   CANVAS BỤI VÀNG & NỀN TOÀN TRANG
   ========================================================================= */

.canvas-ambient {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: -0.01em;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(198, 167, 125, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(158, 61, 52, 0.05) 0%, transparent 45%);
}

body.modal-open {
  overflow: hidden;
}

main {
  position: relative;
  z-index: 2;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1rem, 4vw, 2.5rem);
  padding-right: clamp(1rem, 4vw, 2.5rem);
}

.section-spacing {
  padding-top: clamp(4.5rem, 9vw, 8rem);
  padding-bottom: clamp(4.5rem, 9vw, 8rem);
}

.section-heading {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-heading.text-center {
  text-align: center;
}

.traditional-motif {
  font-size: 1rem;
  color: var(--color-antique-gold);
  letter-spacing: 0.3em;
  margin-bottom: 0.5rem;
  opacity: 0.85;
}

.lotus-emblem {
  color: var(--color-vermilion-lacquer);
  margin-bottom: 0.75rem;
  display: inline-block;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-antique-gold);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-serif-display);
  font-size: clamp(2.1rem, 4.5vw, 3.25rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text-primary);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-family: var(--font-serif-body);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-style: italic;
  color: var(--color-text-secondary);
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* =========================================================================
   HEADER & MUSIC PLAYER
   ========================================================================= */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1.25rem 0;
  transition: all var(--transition-normal);
}

.site-header.is-scrolled {
  background-color: var(--color-surface-translucent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-brand {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.brand-monogram {
  font-family: var(--font-serif-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-deep-brown);
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}

.site-header:not(.is-scrolled) .brand-monogram {
  color: var(--color-white);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.brand-dot {
  color: var(--color-antique-gold);
}

.brand-title-sub {
  font-family: var(--font-serif-body);
  font-size: 0.875rem;
  font-style: italic;
  color: var(--color-soft-gray);
  letter-spacing: 0.05em;
}

.site-header:not(.is-scrolled) .brand-title-sub {
  color: var(--color-champagne-gold-light);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-deep-brown);
  transition: color var(--transition-fast);
  position: relative;
}

.site-header:not(.is-scrolled) .nav-link {
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-antique-gold);
}

/* Nút Bật/Tắt Nhạc Lãng Mạn (Header Music Button) */
.header-music-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  background-color: rgba(250, 248, 245, 0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(198, 167, 125, 0.4);
  color: var(--color-white);
  font-size: 0.8125rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.site-header.is-scrolled .header-music-btn {
  background-color: var(--color-ivory);
  color: var(--color-deep-brown);
  border-color: var(--color-antique-gold);
}

.header-music-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  background-color: var(--color-vermilion-lacquer);
  color: var(--color-white);
  border-color: var(--color-vermilion-lacquer);
}

.music-equalizer {
  display: flex;
  align-items: flex-end;
  gap: 2.5px;
  width: 14px;
  height: 14px;
}

.eq-bar {
  width: 2px;
  height: 4px;
  background-color: currentColor;
  border-radius: 1px;
}

.header-music-btn.is-playing .eq-bar:nth-child(1) { animation: eqJump 0.9s ease-in-out infinite alternate; }
.header-music-btn.is-playing .eq-bar:nth-child(2) { animation: eqJump 0.6s ease-in-out infinite alternate 0.15s; }
.header-music-btn.is-playing .eq-bar:nth-child(3) { animation: eqJump 1.1s ease-in-out infinite alternate 0.3s; }
.header-music-btn.is-playing .eq-bar:nth-child(4) { animation: eqJump 0.75s ease-in-out infinite alternate 0.45s; }

/* Floating Music Button trên Mobile */
.floating-music-btn {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--color-deep-brown);
  color: var(--color-champagne-gold-light);
  border: 1px solid var(--color-antique-gold);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 90;
  box-shadow: var(--shadow-md);
  font-size: 1.1rem;
  transition: all var(--transition-normal);
}

.floating-music-btn.is-playing {
  background-color: var(--color-vermilion-lacquer);
  color: var(--color-white);
  border-color: var(--color-vermilion-lacquer);
  box-shadow: 0 0 16px rgba(158, 61, 52, 0.45);
}

/* =========================================================================
   HERO SECTION
   ========================================================================= */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background-color: var(--color-deep-brown);
  color: var(--color-white);
}

.hero-bg-container {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  will-change: transform;
  transform: scale(1.05);
  transition: transform 0.1s linear;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(38, 28, 23, 0.65) 0%,
    rgba(38, 28, 23, 0.5) 45%,
    rgba(38, 28, 23, 0.88) 100%
  );
}

.hero-golden-dust {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 30%, rgba(198, 167, 125, 0.22) 0%, transparent 65%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 920px;
  padding: 5rem 1.5rem 2.5rem;
}

.hero-lotus-seal {
  color: var(--color-champagne-gold-light);
  margin-bottom: 0.75rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1.5rem;
  background-color: rgba(250, 248, 245, 0.12);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(228, 213, 190, 0.45);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-champagne-gold-light);
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.hero-badge-sparkle {
  color: var(--color-antique-gold);
}

.hero-title {
  font-family: var(--font-serif-display);
  font-size: clamp(2.8rem, 6.8vw, 5.5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-white);
  margin-bottom: 1rem;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.55);
}

.hero-script-accent {
  display: block;
  font-family: var(--font-script);
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  color: var(--color-champagne-gold-light);
  margin-top: 0.2rem;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.45);
}

.hero-tagline {
  font-family: var(--font-serif-body);
  font-size: clamp(1.25rem, 2.5vw, 1.8rem);
  font-style: italic;
  font-weight: 300;
  color: rgba(250, 248, 245, 0.95);
  max-width: 680px;
  margin: 0 auto 2.5rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
}

.hero-scroll-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.hero-scroll-btn:hover {
  color: var(--color-champagne-gold-light);
  transform: translateY(3px);
}

.hero-scroll-mouse {
  width: 22px;
  height: 36px;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.hero-scroll-wheel {
  width: 3px;
  height: 7px;
  background-color: var(--color-champagne-gold-light);
  border-radius: 2px;
  animation: mouseWheel 2s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}

/* =========================================================================
   SECTION 02: GRAND LIVE LOVE CLOCK (ĐỒNG HỒ TÌNH YÊU TRỰC TIẾP)
   ========================================================================= */

.numbers-section {
  background-color: var(--color-surface);
  position: relative;
  z-index: 5;
  border-bottom: 1px solid var(--color-border-subtle);
}

.grand-clock-wrapper {
  max-width: 960px;
  margin: 0 auto clamp(2.5rem, 5vw, 4rem);
}

/* Bộ nút chuyển mốc */
.milestone-switcher {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  margin-bottom: 1.75rem;
}

.switcher-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-pill);
  background-color: var(--color-ivory);
  border: 1px solid var(--color-border);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.switcher-pill:hover {
  background-color: var(--color-warm-beige);
  color: var(--color-text-primary);
  border-color: var(--color-antique-gold);
}

.switcher-pill.is-active {
  background-color: var(--color-vermilion-lacquer);
  border-color: var(--color-vermilion-lacquer);
  color: var(--color-white);
  box-shadow: var(--shadow-lacquer);
}

.switcher-dot {
  color: var(--color-antique-gold);
  font-size: 0.875rem;
}

.switcher-pill.is-active .switcher-dot {
  color: var(--color-champagne-gold-light);
}

/* Thẻ Đồng Hồ Lớn Live Clock Card */
.live-clock-card {
  position: relative;
  background: linear-gradient(180deg, #FFFFFF 0%, #FAF8F5 100%);
  border: 1.5px solid var(--color-antique-gold);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3.5rem) clamp(1.5rem, 3vw, 2.5rem);
  text-align: center;
  box-shadow: var(--shadow-gold);
  overflow: hidden;
}

.live-clock-card::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px dashed rgba(184, 139, 74, 0.35);
  border-radius: calc(var(--radius-lg) - 6px);
  pointer-events: none;
}

.live-clock-ornament {
  margin-bottom: 0.75rem;
}

.ornament-cloud {
  color: var(--color-antique-gold);
  letter-spacing: 0.25em;
  font-size: 1rem;
}

.clock-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-vermilion-lacquer);
  margin-bottom: 0.5rem;
}

.clock-title {
  font-family: var(--font-serif-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--color-deep-brown);
  margin-bottom: 0.25rem;
}

.clock-subtitle {
  font-family: var(--font-serif-body);
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-soft-gray);
  margin-bottom: 2.25rem;
}

/* 4 Khối Đếm Tròn Sống Động */
.live-clock-units {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(0.75rem, 2vw, 2rem);
  max-width: 820px;
  margin: 0 auto 2rem;
}

.clock-unit-box {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.unit-ring-container {
  position: relative;
  width: clamp(80px, 14vw, 120px);
  height: clamp(80px, 14vw, 120px);
  margin-bottom: 0.75rem;
}

.unit-svg-ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-bg {
  fill: none;
  stroke: var(--color-warm-beige);
  stroke-width: 4;
}

.ring-fill {
  fill: none;
  stroke-width: 5;
  stroke-linecap: round;
  stroke-dasharray: 276;
  transition: stroke-dashoffset 0.8s ease;
}

.ring-fill--gold {
  stroke: var(--color-antique-gold);
}

.ring-fill--vermilion {
  stroke: var(--color-vermilion-lacquer);
}

.ring-pulse {
  animation: ringGlow 1s ease-in-out infinite alternate;
}

.unit-content {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.unit-num {
  font-family: var(--font-serif-display);
  font-size: clamp(1.4rem, 3.2vw, 2.5rem);
  font-weight: 700;
  color: var(--color-deep-brown);
  line-height: 1;
}

.unit-num--sec {
  color: var(--color-vermilion-lacquer);
}

.unit-label {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-soft-gray);
  letter-spacing: 0.05em;
}

.clock-summary-pill {
  display: inline-block;
  padding: 0.6rem 1.6rem;
  background-color: var(--color-warm-beige);
  border: 1px solid rgba(184, 139, 74, 0.3);
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  color: var(--color-deep-brown);
}

.clock-summary-pill strong {
  color: var(--color-vermilion-lacquer);
}

/* 3 Cột Mốc Nhỏ Phía Dưới */
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.counter-card {
  background-color: var(--color-ivory);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 3vw, 2.75rem) clamp(1.25rem, 2vw, 1.75rem);
  text-align: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
}

.counter-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-gold);
  border-color: var(--color-antique-gold);
}

.counter-seal-mark {
  margin-bottom: 0.75rem;
}

.counter-star {
  color: var(--color-vermilion-lacquer);
  font-size: 1.25rem;
}

.counter-number-wrapper {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.counter-number {
  font-family: var(--font-serif-display);
  font-size: clamp(2.5rem, 4.5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-deep-brown);
  line-height: 1;
}

.counter-unit {
  font-family: var(--font-serif-body);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--color-antique-gold);
}

.counter-label {
  font-family: var(--font-serif-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 0.15rem;
}

.counter-label-en {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-soft-gray);
  margin-bottom: 0.5rem;
}

.counter-sublabel {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

.counter-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  background-color: var(--color-warm-beige);
  border: 1px solid rgba(184, 139, 74, 0.2);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-deep-brown);
}

/* =========================================================================
   SECTION 03: OUR JOURNEY TIMELINE
   ========================================================================= */

.timeline-section {
  position: relative;
  background-color: var(--color-ivory);
}

.timeline-wrapper {
  position: relative;
  max-width: 1040px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline-track-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background-color: var(--color-border);
  transform: translateX(-50%);
}

.timeline-progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0%;
  background: linear-gradient(180deg, var(--color-antique-gold) 0%, var(--color-vermilion-lacquer) 100%);
  transition: height 0.1s ease-out;
}

.timeline-track {
  display: flex;
  flex-direction: column;
  gap: clamp(3rem, 6vw, 5rem);
  position: relative;
  z-index: 2;
}

.timeline-item {
  display: flex;
  position: relative;
  width: 100%;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.timeline-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-item--left {
  justify-content: flex-start;
}

.timeline-item--right {
  justify-content: flex-end;
}

.timeline-marker {
  position: absolute;
  left: 50%;
  top: 2rem;
  transform: translate(-50%, 0);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
}

.timeline-marker-dot {
  width: 12px;
  height: 12px;
  background-color: var(--color-vermilion-lacquer);
  border-radius: 50%;
  border: 2px solid var(--color-ivory);
  transition: transform var(--transition-normal);
}

.timeline-marker-ring {
  position: absolute;
  inset: -4px;
  border: 1px solid var(--color-antique-gold);
  border-radius: 50%;
  background-color: var(--color-ivory);
}

.timeline-item:hover .timeline-marker-dot {
  transform: scale(1.3);
  background-color: var(--color-antique-gold);
}

.timeline-card {
  width: calc(50% - 3.5rem);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 3vw, 2.5rem);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.timeline-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.timeline-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.timeline-tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-vermilion-lacquer);
}

.timeline-date {
  font-family: var(--font-serif-body);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-deep-brown);
}

.timeline-title-group {
  margin-bottom: 1rem;
}

.timeline-chapter-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-soft-gray);
  letter-spacing: 0.08em;
}

.timeline-title {
  font-family: var(--font-serif-display);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.timeline-title-en {
  display: block;
  font-family: var(--font-serif-body);
  font-size: 0.9375rem;
  font-style: italic;
  color: var(--color-soft-gray);
  margin-top: 0.2rem;
}

.timeline-quote {
  position: relative;
  font-family: var(--font-serif-body);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--color-deep-brown);
  line-height: 1.65;
  margin-bottom: 1.5rem;
  padding-left: 1.25rem;
  border-left: 2px solid var(--color-vermilion-lacquer);
}

.timeline-media {
  margin-bottom: 1.5rem;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.media-frame {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-warm-beige);
}

.media-frame--secondary {
  margin-top: 1rem;
}

.timeline-img {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.timeline-card:hover .timeline-img {
  transform: scale(1.03);
}

.timeline-item--wedding .timeline-card {
  border-color: var(--color-antique-gold);
  background: linear-gradient(180deg, #FFFFFF 0%, #FAF6F0 100%);
}

.timeline-media--polaroid .media-frame {
  background-color: #FFFFFF;
  padding: 12px 12px 32px 12px;
  box-shadow: 0 4px 20px rgba(56, 44, 38, 0.1);
  border: 1px solid var(--color-warm-beige);
}

.timeline-media--polaroid .timeline-img {
  border-radius: var(--radius-sm);
}

.polaroid-caption {
  font-family: var(--font-serif-body);
  font-size: 1rem;
  font-style: italic;
  text-align: center;
  color: var(--color-deep-brown);
  margin-top: 12px;
}

.timeline-story {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.coming-soon-banner {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  background-color: var(--color-vermilion-soft);
  border: 1px dashed var(--color-vermilion-lacquer);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--color-deep-brown);
  text-align: center;
}

.coming-soon-text strong {
  display: block;
  font-size: 0.9375rem;
  color: var(--color-vermilion-lacquer);
}

.coming-soon-sub {
  font-family: var(--font-serif-body);
  font-size: 0.875rem;
  font-style: italic;
  color: var(--color-soft-gray);
}

/* =========================================================================
   SECTION 04: PHOTO MEMORIES (DUAL VIEW GRID & VINTAGE FILMSTRIP)
   ========================================================================= */

.gallery-section {
  background-color: var(--color-surface);
}

.gallery-controls-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.filter-pills-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.625rem;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-pill);
  background-color: var(--color-ivory);
  border: 1px solid var(--color-border);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  background-color: var(--color-warm-beige);
  color: var(--color-text-primary);
  border-color: var(--color-antique-gold);
}

.filter-btn.is-active {
  background-color: var(--color-deep-brown);
  border-color: var(--color-deep-brown);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.filter-count {
  font-size: 0.75rem;
  opacity: 0.75;
}

/* Nút chuyển chế độ Lưới vs Cuốn Phim */
.view-mode-toggle {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-ivory);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 3px;
}

.mode-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.mode-btn.is-active {
  background-color: var(--color-vermilion-lacquer);
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(158, 61, 52, 0.25);
}

/* 1. Lưới nghệ thuật (Masonry Grid) */
.gallery-grid--masonry {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: clamp(1rem, 2vw, 1.75rem);
}

.gallery-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  background-color: var(--color-warm-beige);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.gallery-card:hover,
.gallery-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.gallery-image-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.gallery-img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-card--landscape .gallery-img {
  aspect-ratio: 16/10;
}

.gallery-card:hover .gallery-img {
  transform: scale(1.05);
}

.gallery-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(38, 28, 23, 0.15) 0%,
    rgba(38, 28, 23, 0.82) 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.gallery-card:hover .gallery-card-overlay,
.gallery-card:focus-visible .gallery-card-overlay {
  opacity: 1;
}

.gallery-card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.btn-like-photo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.btn-like-photo:hover {
  transform: scale(1.15);
  background-color: rgba(255, 255, 255, 0.4);
}

.gallery-zoom-icon {
  width: 36px;
  height: 36px;
  background-color: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
}

.gallery-card-meta {
  color: var(--color-white);
}

.gallery-meta-chapter {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-champagne-gold-light);
  margin-bottom: 0.25rem;
}

.gallery-meta-title {
  font-family: var(--font-serif-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.gallery-meta-date {
  font-family: var(--font-serif-body);
  font-size: 0.9375rem;
  font-style: italic;
  opacity: 0.85;
}

/* 2. Cuốn Phim Hoài Niệm (Vintage Filmstrip Roll) */
.gallery-filmstrip-container {
  width: 100%;
  overflow-x: auto;
  padding: 1.5rem 0;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

.filmstrip-roll {
  background-color: #1A1412;
  border-radius: var(--radius-md);
  padding: 1.25rem 0;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  position: relative;
  min-width: max-content;
}

.filmstrip-sprockets {
  height: 16px;
  background-image: radial-gradient(circle, #FAF8F5 35%, transparent 40%);
  background-size: 26px 16px;
  background-repeat: repeat-x;
  opacity: 0.75;
}

.filmstrip-sprockets--top {
  margin-bottom: 1rem;
}

.filmstrip-sprockets--bottom {
  margin-top: 1rem;
}

.filmstrip-frames {
  display: flex;
  gap: 1.5rem;
  padding: 0 1.5rem;
}

.filmstrip-frame {
  position: relative;
  width: 280px;
  background-color: #261E1A;
  border: 1px solid rgba(198, 167, 125, 0.25);
  border-radius: var(--radius-sm);
  padding: 10px;
  cursor: pointer;
  transition: transform var(--transition-normal);
}

.filmstrip-frame:hover {
  transform: scale(1.03);
  border-color: var(--color-antique-gold);
}

.frame-edge-number {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  color: var(--color-antique-gold);
  letter-spacing: 0.15em;
  margin-bottom: 6px;
  font-weight: 600;
}

.frame-photo-box {
  position: relative;
  width: 100%;
  height: 200px;
  border-radius: 4px;
  overflow: hidden;
}

.frame-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.frame-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.8) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 0.75rem;
  color: #fff;
}

.frame-title {
  font-family: var(--font-serif-display);
  font-size: 0.95rem;
  font-weight: 600;
}

.frame-date {
  font-size: 0.75rem;
  color: var(--color-champagne-gold-light);
}

.frame-like {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

.filmstrip-hint {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.875rem;
  color: var(--color-soft-gray);
  font-style: italic;
}

/* =========================================================================
   SECTION 05: TỔ ẤM HÔM NAY (SƠ ĐỒ GIA ĐÌNH)
   ========================================================================= */

.family-section {
  background-color: var(--color-ivory);
  border-top: 1px solid var(--color-border-subtle);
}

.family-tree-diagram {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 3vw, 2.5rem);
  max-width: 980px;
  margin: 0 auto;
}

.tree-node {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 3vw, 2.25rem) clamp(1.5rem, 2.5vw, 2rem);
  text-align: center;
  min-width: 220px;
  flex: 1;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.tree-node:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.tree-node--highlight {
  border-color: var(--color-vermilion-lacquer);
  background: linear-gradient(180deg, #FFFFFF 0%, var(--color-vermilion-soft) 100%);
}

.tree-node-icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 1.25rem;
  background-color: var(--color-warm-beige);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-antique-gold);
}

.tree-node--highlight .tree-node-icon {
  background-color: var(--color-vermilion-lacquer);
  color: var(--color-white);
}

.tree-node-title {
  font-family: var(--font-serif-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-deep-brown);
  margin-bottom: 0.25rem;
}

.tree-node-sub {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}

.tree-node-meta {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-antique-gold);
  padding: 0.25rem 0.75rem;
  background-color: var(--color-ivory);
  border: 1px solid rgba(184, 139, 74, 0.2);
  border-radius: var(--radius-pill);
}

.tree-node-note {
  font-size: 0.75rem;
  color: var(--color-vermilion-lacquer);
  font-style: italic;
  margin-top: 0.5rem;
}

.tree-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--color-antique-gold);
  font-size: 1.5rem;
}

.tree-arrow {
  line-height: 1;
}

.tree-sparkle {
  font-size: 0.875rem;
  margin-top: -0.25rem;
}

/* =========================================================================
   SECTION 06: BÌ THƯ NIÊM PHONG SƠN MÀI (WAX-SEALED LOVE LETTER)
   ========================================================================= */

.message-section {
  background-color: var(--color-surface);
  position: relative;
}

.message-card-wrapper {
  max-width: 860px;
  margin: 0 auto;
}

.envelope-interactive-wrapper {
  position: relative;
  perspective: 1200px;
}

/* Bì thư ban đầu */
.envelope-cover {
  position: relative;
  background: linear-gradient(135deg, #FAF6F0 0%, #E8DEC7 100%);
  border: 2px solid var(--color-antique-gold);
  border-radius: var(--radius-lg);
  padding: clamp(3.5rem, 7vw, 5.5rem) 2rem;
  text-align: center;
  box-shadow: 0 16px 40px rgba(56, 44, 38, 0.12);
  cursor: pointer;
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.envelope-cover:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 48px rgba(184, 139, 74, 0.25);
}

.wax-seal-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.wax-seal-circle {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(158, 61, 52, 0.35);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.wax-seal-btn:hover .wax-seal-circle {
  transform: scale(1.12);
}

.wax-seal-label {
  display: inline-block;
  padding: 0.5rem 1.4rem;
  background-color: var(--color-deep-brown);
  color: var(--color-white);
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  box-shadow: var(--shadow-sm);
}

/* Nội dung lá thư trải ra */
.letter-parchment {
  display: none;
  background-color: #FCFAF7;
  border: 1.5px solid var(--color-antique-gold);
  border-radius: var(--radius-lg);
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.75rem, 5vw, 3.5rem);
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: parchmentUnfold 0.85s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.envelope-interactive-wrapper.is-unfolded .envelope-cover {
  display: none;
}

.envelope-interactive-wrapper.is-unfolded .letter-parchment {
  display: block;
}

.parchment-inner {
  position: relative;
  text-align: center;
}

.parchment-crest {
  color: var(--color-antique-gold);
  margin-bottom: 0.5rem;
  letter-spacing: 0.25em;
}

.parchment-tag {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-vermilion-lacquer);
  margin-bottom: 0.75rem;
}

.parchment-title {
  font-family: var(--font-serif-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-deep-brown);
  margin-bottom: 0.25rem;
}

.parchment-subtitle-en {
  display: block;
  font-family: var(--font-serif-body);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--color-soft-gray);
  margin-bottom: 2rem;
}

.parchment-paragraph {
  font-family: var(--font-serif-body);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.95;
  color: var(--color-deep-brown);
  margin-bottom: 1.25rem;
}

.parchment-footer {
  border-top: 1px solid var(--color-border);
  padding-top: 2.25rem;
  margin-top: 2.25rem;
}

.signature-line {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.signature-text {
  font-family: var(--font-script);
  font-size: 3rem;
  color: var(--color-antique-gold);
  line-height: 1.2;
}

.signature-date {
  font-size: 0.875rem;
  color: var(--color-soft-gray);
}

.btn-love-burst {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 2rem;
  background: var(--grad-lacquer);
  color: var(--color-white);
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 600;
  box-shadow: 0 4px 18px rgba(158, 61, 52, 0.35);
  transition: all var(--transition-fast);
}

.btn-love-burst:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 8px 24px rgba(158, 61, 52, 0.5);
}

/* =========================================================================
   SECTION 07: FOOTER
   ========================================================================= */

.site-footer {
  background-color: var(--color-deep-brown);
  color: var(--color-ivory);
  padding: 4.5rem 0 2.5rem;
  border-top: 1px solid rgba(198, 167, 125, 0.2);
}

.footer-content {
  text-align: center;
  max-width: 620px;
  margin: 0 auto;
}

.footer-lotus {
  margin-bottom: 1rem;
}

.footer-brand {
  font-family: var(--font-serif-display);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
  color: var(--color-white);
}

.footer-tagline {
  font-family: var(--font-serif-body);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--color-champagne-gold-light);
  margin-bottom: 1.75rem;
}

.footer-divider {
  width: 60px;
  height: 1px;
  background-color: var(--color-antique-gold);
  margin: 0 auto 1.75rem;
  opacity: 0.45;
}

.footer-credit {
  font-size: 0.9375rem;
  color: rgba(250, 248, 245, 0.85);
  margin-bottom: 0.5rem;
}

.author-link {
  color: var(--color-champagne-gold-light);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.author-link:hover,
.author-link:focus-visible {
  color: var(--color-white);
}

.footer-copy {
  font-size: 0.8125rem;
  color: rgba(250, 248, 245, 0.55);
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background-color: var(--color-deep-brown);
  color: var(--color-champagne-gold-light);
  border: 1px solid var(--color-antique-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  z-index: 90;
  box-shadow: var(--shadow-md);
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-vermilion-lacquer);
  color: var(--color-white);
  border-color: var(--color-vermilion-lacquer);
  transform: translateY(-3px);
}

/* =========================================================================
   LIGHTBOX DIALOG
   ========================================================================= */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(28, 20, 16, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.lightbox-dialog {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1100px;
  max-height: 92vh;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.lightbox-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  color: var(--color-white);
}

.lightbox-counter {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--color-champagne-gold-light);
}

.lightbox-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.12);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.lightbox-btn:hover {
  background-color: var(--color-vermilion-lacquer);
  color: var(--color-white);
}

.lightbox-main {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all var(--transition-fast);
}

.lightbox-nav-btn:hover {
  background-color: var(--color-vermilion-lacquer);
  color: var(--color-white);
  border-color: var(--color-vermilion-lacquer);
}

.lightbox-nav-btn--prev {
  left: 0.5rem;
}

.lightbox-nav-btn--next {
  right: 0.5rem;
}

.lightbox-viewport {
  max-height: 68vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.lightbox-img {
  max-width: 100%;
  max-height: 68vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.lightbox-caption {
  text-align: center;
  color: var(--color-white);
  margin-top: 1.25rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.lightbox-caption-chapter {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-champagne-gold-light);
  margin-bottom: 0.25rem;
}

.lightbox-caption-title {
  font-family: var(--font-serif-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.lightbox-caption-desc {
  font-family: var(--font-serif-body);
  font-size: 1.0625rem;
  font-style: italic;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 0.25rem;
}

.lightbox-caption-date {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.55);
}

/* =========================================================================
   VIDEO MEDIA SHOWCASE STYLES
   ========================================================================= */
.timeline-video {
  width: 100%;
  max-height: 540px;
  object-fit: contain;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  display: block;
  background-color: #0d0a08;
  margin: 0 auto;
}

.media-frame--video {
  background-color: #0d0a08;
  border: 1px solid rgba(212, 175, 55, 0.35);
  box-shadow: 0 8px 30px rgba(56, 44, 38, 0.2);
  text-align: center;
}

.video-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  background: linear-gradient(135deg, rgba(43, 31, 23, 0.95), rgba(64, 46, 35, 0.95));
  color: var(--color-champagne-gold-light);
  font-size: 0.8125rem;
  font-weight: 500;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
}

.video-badge-icon {
  font-size: 1rem;
}

.gallery-video-pill {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 4px 12px;
  background: rgba(30, 20, 15, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #FFF;
  border: 1px solid rgba(212, 175, 55, 0.45);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

.gallery-play-center {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  pointer-events: none;
}

.play-pulse-circle {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: rgba(158, 61, 52, 0.9);
  color: #FFF;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.7);
  transition: transform var(--transition-bounce), background-color var(--transition-fast);
  animation: playGlowPulse 2.4s infinite;
}

.play-pulse-circle svg {
  margin-left: 3px;
}

.gallery-card:hover .play-pulse-circle {
  transform: scale(1.12);
  background: var(--color-imperial-vermilion);
}

@keyframes playGlowPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.6);
  }
  70% {
    box-shadow: 0 0 0 14px rgba(212, 175, 55, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(212, 175, 55, 0);
  }
}

.frame-photo-box--video {
  position: relative;
}

.frame-video-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 3;
  padding: 2px 8px;
  background: rgba(0, 0, 0, 0.75);
  border: 1px solid var(--color-champagne-gold);
  border-radius: 4px;
  color: #FFF;
  font-size: 0.6875rem;
  font-weight: 600;
  pointer-events: none;
}

.lightbox-video {
  max-width: 100%;
  max-height: 68vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
  background-color: #000;
  outline: none;
}