/* Khung chung cho cả 4 mẫu: thiệp là một cột dọc kiểu điện thoại,
   trên màn hình rộng thì nằm giữa nền trang trí Á Đông của từng mẫu. */
:root {
  --bg: #f8f1e5;
  --paper: #fffaf2;
  --ink: #2b1412;
  --muted: #7a5c55;
  --accent: #9b1b1e;
  --accent-deep: #6b0f12;
  --gold: #c89d54;
  --gold-light: #edd39c;
  --line: rgba(138, 35, 30, 0.16);
  --on-accent: #fff8ee;
  --backdrop: #2e090a;
  --f-display: "Cormorant Garamond", Georgia, serif;
  --f-body: "Be Vietnam Pro", -apple-system, BlinkMacSystemFont, sans-serif;
  --f-serif-vi: "Noto Serif Display", "Cormorant Garamond", Georgia, serif;
  --radius: 8px;
  --btn-radius: 999px;
  --ph-1: #e9d6c4;
  --ph-2: #d8b9a1;
  --ph-ink: rgba(60, 30, 24, 0.55);
  --column: 480px;
}

* { box-sizing: border-box; }
/* Số kiểu cũ của Cormorant khó đọc ngày giờ; ép số thẳng hàng. */
*, *::before, *::after { font-variant-numeric: lining-nums !important; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--backdrop);
  color: var(--ink);
  font: 400 15px/1.7 var(--f-body);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
h1, h2, h3 { font-weight: 400; text-wrap: balance; }
p, blockquote, address { text-wrap: pretty; }
.invite:focus { outline: none; }

.invite {
  position: relative;
  width: min(var(--column), 100%);
  margin: 0 auto;
  overflow: hidden;
  background: var(--bg);
}

@media (min-width: 640px) {
  body { padding: 72px 0 96px; }
  .invite {
    border-radius: 20px;
    box-shadow:
      0 40px 120px rgba(15, 3, 3, 0.48),
      0 0 0 1px rgba(212, 170, 99, 0.28),
      0 0 0 8px rgba(255, 255, 255, 0.03);
  }
}

.kicker {
  margin: 0;
  color: var(--accent);
  font: 600 11px/1.4 var(--f-body);
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

/* Họa tiết Song Hỷ & Vân Mây dùng chung */
.asian-seal {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #f8e2ac, var(--gold) 62%, #9a6f2d);
  color: var(--accent-deep);
  font: 700 22px/1 "Noto Serif TC", "Songti SC", "SimSun", serif;
  box-shadow: 0 6px 18px rgba(40, 8, 6, 0.22), inset 0 0 0 1.5px rgba(255, 250, 235, 0.65);
}

/* Khung ảnh: tông màu theo mẫu làm nền khi ảnh chưa tải xong. */
.ph {
  position: relative;
  margin: 0;
  overflow: hidden;
  aspect-ratio: var(--ratio, 4 / 5);
  background:
    radial-gradient(120% 80% at 20% 10%, rgba(255, 255, 255, 0.45), transparent 55%),
    radial-gradient(90% 70% at 85% 95%, rgba(0, 0, 0, 0.12), transparent 60%),
    linear-gradient(160deg, var(--ph-1), var(--ph-2));
}
.ph::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .5 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.25'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
  opacity: 0.45;
}
.ph img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 22%;
  transition: transform 0.8s cubic-bezier(0.2, 0.75, 0.25, 1);
}
.ph[data-lightbox]:hover img {
  transform: scale(1.04);
}
.ph[data-lightbox] {
  cursor: zoom-in;
}

/* Thanh chọn mẫu (dùng cho bản demo) + nút mở lại cổng thiệp */
.design-switcher {
  position: fixed;
  z-index: 200;
  top: 12px;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 3px;
  max-width: calc(100vw - 16px);
  overflow-x: auto;
  padding: 5px;
  border: 1px solid rgba(227, 196, 138, 0.32);
  border-radius: 999px;
  background: rgba(34, 9, 8, 0.86);
  box-shadow: 0 12px 34px rgba(10, 2, 2, 0.42);
  font-family: "Be Vietnam Pro", Arial, sans-serif;
  scrollbar-width: none;
  backdrop-filter: blur(16px);
  transform: translateX(-50%);
}
.design-switcher::-webkit-scrollbar { display: none; }
.design-switcher a,
.design-switcher button.replay-gate {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  padding: 0 13px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: rgba(255, 244, 232, 0.78);
  font: 500 11px/1 "Be Vietnam Pro", Arial, sans-serif;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, transform 0.2s ease;
}
.design-switcher a:hover,
.design-switcher button.replay-gate:hover {
  color: #fff8ee;
  background: rgba(255, 244, 232, 0.1);
}
.design-switcher a span {
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(255, 244, 232, 0.12);
  font-size: 9px;
  font-weight: 600;
}
.design-switcher a.is-active {
  background: linear-gradient(135deg, #f9e4b7, #d8ad60);
  color: #3a0d0b;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(216, 173, 96, 0.35);
}
.design-switcher a.is-active span {
  background: #7b1611;
  color: #fbecd0;
}
.design-switcher button.replay-gate,
.design-switcher button.guest-link-btn {
  padding-inline: 10px;
  border-left: 1px solid rgba(255, 244, 232, 0.16);
  border-radius: 0;
  color: #f3d28e;
  font-size: 10.5px;
}
.design-switcher button.guest-link-btn {
  border-radius: 0 999px 999px 0;
  color: #ffe8ba;
}

/* Popover tạo link mời cá nhân hóa tên khách (học hỏi từ chungdoi.com) */
.guest-link-popover {
  position: fixed;
  z-index: 210;
  bottom: 72px;
  left: 50%;
  transform: translateX(-50%);
  width: min(360px, calc(100vw - 24px));
  padding: 16px;
  border: 1px solid rgba(227, 196, 138, 0.42);
  border-radius: 14px;
  background: rgba(34, 9, 8, 0.96);
  box-shadow: 0 22px 54px rgba(10, 2, 2, 0.55);
  color: #fff6ea;
  font: 400 12.5px/1.5 var(--f-body);
  backdrop-filter: blur(18px);
}
.guest-link-popover[hidden] { display: none; }
.guest-link-popover strong {
  display: block;
  margin-bottom: 4px;
  color: #f5d896;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.guest-link-popover p {
  margin: 0 0 10px;
  color: rgba(255, 244, 232, 0.76);
  font-size: 11.5px;
}
.guest-link-row {
  display: flex;
  gap: 6px;
}
.guest-link-row input {
  flex: 1;
  min-width: 0;
  padding: 8px 11px;
  border: 1px solid rgba(227, 196, 138, 0.38);
  border-radius: 8px;
  background: rgba(255, 250, 240, 0.08);
  color: #fff8ee;
  font: 500 12.5px/1.2 var(--f-body);
}
.guest-link-row input::placeholder { color: rgba(255, 244, 232, 0.42); }
.guest-link-row input:focus { outline: 1px solid #e5c178; }
.guest-link-row button {
  flex-shrink: 0;
  padding: 0 12px;
  border: 0;
  border-radius: 8px;
  background: linear-gradient(135deg, #f9e4b7, #d8ad60);
  color: #3a0d0b;
  font: 600 11.5px/1 var(--f-body);
  cursor: pointer;
}
.guest-link-status {
  display: block;
  margin-top: 8px;
  color: #f3d28e;
  font-size: 11px;
}

/* Nút bật nhạc + Nút thả tim chúc phúc nổi */
.floating-controls {
  position: fixed;
  z-index: 180;
  right: calc(14px + env(safe-area-inset-right));
  bottom: calc(16px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.demo-music,
.demo-heart-btn {
  position: relative;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1.5px solid rgba(235, 202, 138, 0.55);
  border-radius: 50%;
  background: radial-gradient(circle at 30% 25%, var(--accent), var(--accent-deep));
  box-shadow: 0 10px 26px rgba(20, 6, 4, 0.38);
  color: var(--on-accent);
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.demo-music:hover,
.demo-heart-btn:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 14px 30px rgba(20, 6, 4, 0.45);
}
.demo-music:active,
.demo-heart-btn:active {
  transform: scale(0.94);
}
.demo-music [data-music-label] {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}
.demo-music:focus-visible,
.demo-heart-btn:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.demo-music .music-bars { display: flex; align-items: center; gap: 3px; height: 16px; }
.demo-music .music-bars i { display: block; width: 2px; height: 5px; border-radius: 2px; background: currentColor; }
.demo-music.is-playing .music-bars i { animation: demo-music-bar 0.75s ease-in-out infinite alternate; }
.demo-music.is-playing .music-bars i:nth-child(2) { animation-delay: -0.3s; }
.demo-music.is-playing .music-bars i:nth-child(3) { animation-delay: -0.55s; }
@keyframes demo-music-bar { to { height: 16px; } }

.demo-heart-btn {
  background: radial-gradient(circle at 30% 25%, #fff8ee, #f3e0c4);
  color: var(--accent);
  border-color: rgba(155, 27, 30, 0.28);
  font-size: 18px;
}
.demo-heart-btn .heart-count {
  position: absolute;
  top: -5px;
  right: -5px;
  min-width: 20px;
  height: 18px;
  padding: 0 5px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff8ee;
  font: 600 9px/18px var(--f-body);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

/* Hoa rơi & kim tuyến bay nhẹ trong khung thiệp */
.ambient-fx {
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
  overflow: hidden;
}
.ambient-petal {
  position: absolute;
  top: -24px;
  left: var(--x, 50%);
  width: var(--size, 10px);
  height: calc(var(--size, 10px) * 1.35);
  border-radius: 80% 15% 80% 20%;
  background: var(--petal-color, rgba(214, 48, 60, 0.22));
  box-shadow: inset 0 0 4px rgba(255, 230, 190, 0.35);
  animation: ambientFall var(--dur, 14s) var(--delay, 0s) linear infinite;
}
.ambient-petal.is-gold {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: radial-gradient(circle, #ffe8a3, #c89d54);
  opacity: 0.45;
}
@keyframes ambientFall {
  0% { transform: translate3d(0, -30px, 0) rotate(0deg); opacity: 0; }
  12% { opacity: 0.72; }
  88% { opacity: 0.55; }
  100% { transform: translate3d(var(--drift, 55px), 105vh, 0) rotate(380deg); opacity: 0; }
}

/* Tim bay lên khi khách bấm thả tim */
.floating-blessing {
  position: fixed;
  z-index: 950;
  right: 28px;
  bottom: 72px;
  pointer-events: none;
  font-size: 20px;
  color: var(--accent);
  text-shadow: 0 2px 8px rgba(255, 240, 220, 0.8);
  animation: blessingRise 1.7s cubic-bezier(0.16, 0.8, 0.3, 1) forwards;
}
@keyframes blessingRise {
  0% { opacity: 0; transform: translate(0, 10px) scale(0.5); }
  20% { opacity: 1; transform: translate(var(--bx, -10px), -18px) scale(1.15); }
  100% { opacity: 0; transform: translate(calc(var(--bx, -10px) * 2.2), -150px) scale(0.85) rotate(var(--br, 15deg)); }
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.85s ease, transform 0.85s cubic-bezier(0.2, 0.75, 0.25, 1);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* Màn mở thiệp. Mỗi mẫu đổi màu và hướng mở trong file theme của mình. */
body.is-invitation-locked { overflow: hidden; }
.invitation-gate {
  --gate-bg: var(--accent);
  --gate-ink: var(--on-accent);
  --gate-gold: var(--gold);
  position: fixed;
  z-index: 1000;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: var(--gate-ink);
}
.invitation-door {
  position: absolute;
  background: var(--gate-bg);
  transition: transform 1.3s cubic-bezier(0.7, 0, 0.2, 1);
}
.invitation-door-left { top: 0; bottom: 0; left: 0; width: 50.5%; }
.invitation-door-right { top: 0; bottom: 0; right: 0; width: 50.5%; }
.invitation-gate.is-opening .invitation-door-left { transform: translateX(-101%); }
.invitation-gate.is-opening .invitation-door-right { transform: translateX(101%); }

.gate-envelope-stage {
  position: relative;
  z-index: 3;
  display: grid;
  place-items: center;
}
.gate-envelope { display: none; }

.invitation-gate-card {
  position: relative;
  z-index: 3;
  width: min(352px, calc(100vw - 40px));
  padding: 46px 26px 38px;
  text-align: center;
  transition: opacity 0.5s ease, transform 0.7s ease;
}
.invitation-gate.is-opening { pointer-events: none; }
.invitation-gate.is-opening .invitation-gate-card { opacity: 0; transform: scale(0.92); }
.invitation-gate-card > p {
  margin: 0;
  color: var(--gate-gold);
  font: 600 11px/1.5 var(--f-body);
  letter-spacing: 0.24em;
  text-transform: uppercase;
}
.invitation-gate-card .gate-title {
  margin: 18px 0 10px;
  font: 500 50px/1.05 var(--f-display);
}
.invitation-gate-card .gate-title i { color: var(--gate-gold); font-style: italic; }
.invitation-gate-card .gate-date {
  margin: 0 0 16px;
  opacity: 0.82;
  font: 500 13px/1.4 var(--f-body);
  letter-spacing: 0.22em;
}
.invitation-gate-card .gate-guest-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0 auto 20px;
  padding: 6px 16px;
  border: 1px solid color-mix(in srgb, var(--gate-gold) 45%, transparent);
  border-radius: 999px;
  background: rgba(20, 4, 4, 0.28);
  color: var(--gate-ink);
  font: 500 12.5px/1.3 var(--f-body);
  letter-spacing: 0.04em;
}
.invitation-gate-card .gate-guest-pill strong {
  color: var(--gate-gold);
  font-weight: 600;
}
.invitation-gate-card button {
  display: grid;
  gap: 14px;
  place-items: center;
  margin: 0 auto;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: 600 11px/1 var(--f-body);
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
.invitation-gate-card button span {
  display: grid;
  width: 88px;
  height: 88px;
  place-items: center;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #fae5b2, var(--gate-gold) 65%, #9a6e2a);
  box-shadow:
    0 0 0 8px color-mix(in srgb, var(--gate-gold) 20%, transparent),
    0 14px 32px rgba(15, 2, 2, 0.4);
  color: var(--gate-bg);
  font: 700 34px/1 "Noto Serif TC", "SimSun", var(--f-display);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  animation: gate-pulse 2.4s ease-in-out infinite;
}
.invitation-gate-card button:hover span,
.invitation-gate-card button:focus-visible span { transform: scale(1.06); }
.invitation-gate-card button:focus-visible { outline: 0; }
.invitation-gate-card > small {
  display: block;
  margin-top: 22px;
  color: color-mix(in srgb, var(--gate-ink) 68%, transparent);
  font-size: 11px;
  letter-spacing: 0.04em;
}
@keyframes gate-pulse {
  0%, 100% { box-shadow: 0 0 0 8px color-mix(in srgb, var(--gate-gold) 20%, transparent), 0 12px 28px rgba(15, 2, 2, 0.35); }
  50% { box-shadow: 0 0 0 16px color-mix(in srgb, var(--gate-gold) 6%, transparent), 0 16px 36px rgba(15, 2, 2, 0.45); }
}

.opening-petals { position: absolute; z-index: 4; inset: 0; pointer-events: none; }
.opening-petals i {
  position: absolute;
  top: 45%;
  left: var(--petal-x);
  width: 12px;
  height: 18px;
  border-radius: 80% 15% 70% 25%;
  background: var(--gate-gold);
  opacity: 0;
}
.invitation-gate.is-opening .opening-petals i {
  animation: openingPetal 1.4s var(--petal-delay) cubic-bezier(0.15, 0.65, 0.25, 1) both;
}
@keyframes openingPetal {
  0% { opacity: 0; translate: 0 0; rotate: 0deg; }
  18% { opacity: 0.9; }
  100% { opacity: 0; translate: var(--petal-drift) 50vh; rotate: 280deg; }
}

/* Mưa hoa 6 cánh & cánh lụa rơi bồng bềnh + tung bay theo nhịp lướt */
.ambient-blossoms {
  position: fixed;
  inset: 0;
  z-index: 95;
  overflow: hidden;
  pointer-events: none;
}
.ambient-blossom {
  position: absolute;
  top: -32px;
  display: inline-flex;
  opacity: 0.48;
  filter: drop-shadow(0 2px 5px rgba(84, 10, 8, 0.14));
  animation: ambientBlossomFall 16s ease-in-out infinite;
  will-change: transform, opacity;
}
@keyframes ambientBlossomFall {
  0% {
    opacity: 0;
    transform: translate3d(0, -24px, 0) rotate(0deg) rotateX(0deg) scale(0.85);
  }
  12% {
    opacity: 0.55;
  }
  35% {
    transform: translate3d(var(--sway, 24px), 34vh, 0) rotate(125deg) rotateX(35deg) scale(1);
  }
  68% {
    transform: translate3d(calc(var(--sway, 24px) * -0.9), 68vh, 0) rotate(245deg) rotateY(30deg) scale(0.95);
  }
  88% {
    opacity: 0.42;
  }
  100% {
    opacity: 0;
    transform: translate3d(calc(var(--sway, 24px) * 0.65), 104vh, 0) rotate(360deg) rotateX(0deg) scale(0.85);
  }
}

/* Cánh hoa & bông hoa tung bay bồng bềnh theo luồng gió khi người dùng lướt trang */
.scroll-wind-petal {
  position: fixed;
  display: inline-flex;
  pointer-events: none;
  filter: drop-shadow(0 3px 8px rgba(110, 15, 12, 0.22));
  animation: scrollWindFloat 1.6s cubic-bezier(0.18, 0.76, 0.32, 1) forwards;
  will-change: transform, opacity;
}
@keyframes scrollWindFloat {
  0% {
    opacity: 0;
    transform: translate3d(0, 0, 0) rotate(0deg) scale(0.55);
  }
  22% {
    opacity: 0.72;
    transform: translate3d(calc(var(--dx, 30px) * 0.32), calc(var(--dy, -70px) * 0.32), 0) rotate(calc(var(--rot, 180deg) * 0.35)) scale(1.06);
  }
  75% {
    opacity: 0.48;
  }
  100% {
    opacity: 0;
    transform: translate3d(var(--dx, 30px), var(--dy, -70px), 0) rotate(var(--rot, 180deg)) scale(0.75);
  }
}

/* Khép thiệp */
.theme-close {
  position: relative;
  padding: 96px 28px 120px;
  text-align: center;
  overflow: hidden;
}
.theme-close p { margin: 0; color: var(--accent); font: 600 11px/1.5 var(--f-body); letter-spacing: 0.24em; text-transform: uppercase; }
.theme-close h2 { margin: 18px 0 14px; font: 400 60px/1.04 var(--f-display); }
.theme-close h2 i { color: var(--accent); }
.theme-close span { color: var(--muted); font-size: 13px; letter-spacing: 0.22em; }