:root {
  --bg: #fbf7f4;
  --bg-alt: #f4ebe5;
  --card: #ffffff;
  --text: #3d2f2b;
  --muted: #86706a;
  --accent: #b08a83;
  --accent-strong: #8c5f57;
  --on-accent: #ffffff;
  --border: #e8dad2;
  --shadow: 0 12px 32px rgb(98 64 56 / 0.08);
  --font-body: 'Be Vietnam Pro', system-ui, sans-serif;
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-script: 'Dancing Script', cursive;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1716;
    --bg-alt: #241d1b;
    --card: #2c2422;
    --text: #f2e7e2;
    --muted: #b8a29b;
    --accent: #c99a91;
    --accent-strong: #e5bbb2;
    --on-accent: #1c1716;
    --border: #3e3230;
    --shadow: 0 12px 32px rgb(0 0 0 / 0.35);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: 64px;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.25;
}

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

/* ---------- Thanh menu ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 16px;
  height: 56px;
  padding: 0 16px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  flex-shrink: 0;
  color: var(--accent-strong);
  font-family: var(--font-script);
  font-size: 1.5rem;
  text-decoration: none;
}

.nav ul {
  display: flex;
  gap: 4px;
  margin: 0 0 0 auto;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav ul a {
  display: block;
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--text);
  font-size: 0.875rem;
  white-space: nowrap;
  text-decoration: none;
}

.nav ul a:hover {
  background: var(--bg-alt);
  color: var(--accent-strong);
}

/* ---------- Đầu trang ---------- */
.hero {
  display: grid;
  place-items: center;
  min-height: min(100svh, 960px);
  padding: 96px 16px 64px;
  text-align: center;
  background:
    radial-gradient(circle at 15% 20%, rgb(176 138 131 / 0.28), transparent 45%),
    radial-gradient(circle at 85% 80%, rgb(222 186 168 / 0.35), transparent 50%),
    var(--bg-alt);
  background-position: center;
  background-size: cover;
}

.hero.has-cover {
  color: #fff;
}

.eyebrow {
  margin: 0;
  color: var(--accent-strong);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.has-cover .eyebrow {
  color: #f6dcd5;
}

.hero-names {
  margin: 16px 0;
  font-family: var(--font-script);
  font-size: clamp(3rem, 11vw, 6.5rem);
  font-weight: 600;
  line-height: 1.1;
}

.hero-names .amp {
  display: block;
  color: var(--accent);
  font-size: 0.55em;
}

.hero-date {
  margin: 0 0 32px;
  font-family: var(--font-heading);
  font-size: clamp(1.125rem, 3vw, 1.375rem);
  font-style: italic;
}

.countdown {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.countdown > div {
  display: grid;
  min-width: 72px;
  padding: 12px 8px;
  background: color-mix(in srgb, var(--card) 75%, transparent);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.has-cover .countdown > div {
  background: rgb(255 255 255 / 0.15);
  border-color: rgb(255 255 255 / 0.3);
}

.countdown strong {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.countdown span {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.countdown-done {
  font-family: var(--font-heading);
  font-size: 1.25rem;
}

/* ---------- Khung chung cho các phần ---------- */
.section {
  /* Nội dung rộng tối đa 960px, luôn chừa ít nhất 16px hai bên. */
  padding: 88px max(16px, calc((100% - 960px) / 2));
  text-align: center;
}

.section-alt {
  background: var(--bg-alt);
}

.section-title {
  margin: 8px 0 48px;
  font-size: clamp(2rem, 5vw, 2.75rem);
}

.section-title::after {
  content: '♥';
  display: block;
  margin-top: 8px;
  color: var(--accent);
  font-size: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: 1px solid var(--accent-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--accent-strong);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 400;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--bg-alt);
}

.btn-primary {
  background: var(--accent-strong);
  color: var(--on-accent);
}

.btn-primary:hover {
  background: var(--accent);
}

.btn:disabled {
  opacity: 0.6;
  cursor: wait;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.card-title {
  margin: 0 0 16px;
  font-size: 1.5rem;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 16px;
}

/* ---------- Cặp đôi ---------- */
.couple {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}

.couple-amp {
  color: var(--accent);
  font-family: var(--font-script);
  font-size: 4rem;
}

.avatar {
  width: 180px;
  height: 180px;
  margin: 0 auto 16px;
  border: 6px solid var(--card);
  border-radius: 50%;
  box-shadow: var(--shadow);
  object-fit: cover;
}

.avatar-placeholder {
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #e7c6bc, #b08a83);
  color: #fff;
  font-family: var(--font-script);
  font-size: 4.5rem;
}

.person-role {
  margin: 0;
  color: var(--accent-strong);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.person-name {
  margin: 4px 0 8px;
  font-size: 1.625rem;
}

.person-bio {
  max-width: 320px;
  margin: 0 auto;
  color: var(--muted);
}

@media (max-width: 640px) {
  .couple {
    grid-template-columns: 1fr;
  }

  .couple-amp {
    font-size: 3rem;
    line-height: 1;
  }
}

/* ---------- Chuyện tình yêu ---------- */
.timeline {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 0 0 28px;
  border-left: 2px solid var(--border);
  list-style: none;
  text-align: left;
}

.timeline-item {
  position: relative;
  margin-bottom: 24px;
  padding: 20px 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item::before {
  content: '♥';
  position: absolute;
  top: 18px;
  left: -42px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-strong);
  color: var(--on-accent);
  font-size: 0.75rem;
}

.timeline-date {
  color: var(--accent-strong);
  font-size: 0.875rem;
  font-weight: 600;
}

.timeline-item h3 {
  margin: 4px 0;
  font-size: 1.25rem;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
}

/* ---------- Album ảnh ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

@media (max-width: 640px) {
  .gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

.photo {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  padding: 0;
  border: 0;
  border-radius: 16px;
  background: var(--bg-alt);
  cursor: zoom-in;
}

.photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.photo:hover img {
  transform: scale(1.05);
}

.photo-caption {
  position: absolute;
  inset: auto 0 0;
  padding: 24px 12px 12px;
  background: linear-gradient(transparent, rgb(30 20 18 / 0.55));
  color: #fff;
  font-size: 0.875rem;
  text-align: left;
}

.photo-placeholder {
  cursor: default;
  background: linear-gradient(160deg, #f0d9d0, #c9a39a);
}

.photo-placeholder:nth-child(3n + 2) {
  background: linear-gradient(160deg, #eadfd2, #b9a084);
}

.photo-placeholder:nth-child(3n) {
  background: linear-gradient(160deg, #e3d8de, #a98c9a);
}

.photo-placeholder::before {
  content: '♥';
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: rgb(255 255 255 / 0.6);
  font-size: 2.5rem;
}

.lightbox {
  max-width: 92vw;
  max-height: 92vh;
  padding: 0;
  border: 0;
  background: transparent;
  overflow: visible;
}

.lightbox::backdrop {
  background: rgb(15 10 9 / 0.88);
}

.lightbox figure {
  margin: 0;
}

.lightbox img {
  max-width: 92vw;
  max-height: 82vh;
  border-radius: 8px;
  object-fit: contain;
}

.lightbox figcaption {
  padding-top: 8px;
  color: #fff;
  text-align: center;
}

.lightbox-btn {
  position: fixed;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: rgb(255 255 255 / 0.15);
  color: #fff;
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
}

.lightbox-btn:hover {
  background: rgb(255 255 255 / 0.3);
}

.lightbox-prev {
  top: 50%;
  left: 16px;
}

.lightbox-next {
  top: 50%;
  right: 16px;
}

.lightbox-close {
  top: 16px;
  right: 16px;
}

/* ---------- Sự kiện ---------- */
.event-time {
  margin: 0;
  color: var(--accent-strong);
  font-family: var(--font-heading);
  font-size: 1.75rem;
}

.event-date {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.875rem;
}

.event-place {
  margin: 0;
  font-weight: 600;
}

.event-address {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.875rem;
}

/* ---------- Sổ lưu bút ---------- */
.wish-form {
  display: grid;
  gap: 12px;
  max-width: 640px;
  margin: 0 auto;
}

.wish-form input,
.wish-form textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  font: inherit;
  resize: vertical;
}

.wish-form input:focus,
.wish-form textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.wish-form .btn {
  justify-self: center;
  padding-inline: 32px;
}

.wish-status {
  min-height: 1.6em;
  margin: 0;
}

.wish-status[data-kind='error'] {
  color: #c0392b;
}

.wish-status[data-kind='ok'] {
  color: var(--accent-strong);
}

.note {
  max-width: 640px;
  margin: 0 auto 16px;
  color: var(--muted);
  font-size: 0.8125rem;
}

.wish-list {
  display: grid;
  gap: 12px;
  max-width: 640px;
  max-height: 480px;
  margin: 16px auto 0;
  padding: 4px;
  overflow-y: auto;
  list-style: none;
  text-align: left;
}

.wish {
  padding: 16px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.wish-name {
  color: var(--accent-strong);
  font-weight: 600;
}

.wish-message {
  margin: 4px 0 0;
  overflow-wrap: anywhere;
  white-space: pre-line;
}

.wish-empty {
  color: var(--muted);
  text-align: center;
}

/* ---------- Mừng cưới ---------- */
.qr {
  width: 200px;
  margin-bottom: 16px;
  border-radius: 12px;
}

.qr-placeholder {
  display: grid;
  place-items: center;
  height: 200px;
  padding: 24px;
  border: 2px dashed var(--border);
  color: var(--muted);
  font-size: 0.875rem;
}

.gift-info {
  display: grid;
  gap: 8px;
  width: 100%;
  margin: 0 0 16px;
}

.gift-info div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border);
}

.gift-info dt {
  color: var(--muted);
}

.gift-info dd {
  margin: 0;
  font-weight: 600;
  text-align: right;
}

/* ---------- Chân trang ---------- */
.footer {
  padding: 48px 16px;
  color: var(--muted);
  font-size: 0.875rem;
  text-align: center;
}

.footer-names {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-family: var(--font-script);
  font-size: 2rem;
}

.footer a {
  color: inherit;
}

/* ---------- Nhạc nền ---------- */
.music-toggle {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 10;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 50%;
  background: var(--accent-strong);
  color: var(--on-accent);
  font-size: 1.25rem;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.music-toggle[aria-pressed='true'] {
  animation: spin 4s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- Hoa rơi ---------- */
.petals {
  position: fixed;
  inset: 0;
  z-index: 5;
  overflow: hidden;
  pointer-events: none;
}

.petal {
  position: absolute;
  top: -24px;
  left: var(--x);
  width: var(--size);
  height: calc(var(--size) * 0.8);
  border-radius: 150% 0 150% 0;
  background: linear-gradient(135deg, #f7d4d0, #e3a5a0);
  opacity: 0.75;
  animation: fall var(--duration) linear var(--delay) infinite;
}

@keyframes fall {
  to {
    transform: translate(var(--drift), 110vh) rotate(540deg);
  }
}