:root {
  color-scheme: light;
  --ink: #33272d;
  --muted: #765f69;
  --cream: #fffaf5;
  --rose: #d95c83;
  --rose-dark: #9d3155;
  --blush: #f8d9e3;
  --lavender: #e7dcfa;
  --line: rgba(113, 63, 81, 0.14);
  --shadow: 0 28px 80px rgba(92, 49, 66, 0.16);
  font-family: "Noto Serif SC", "Songti SC", "Microsoft YaHei", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 18%, rgba(249, 205, 221, 0.55), transparent 30rem),
    radial-gradient(circle at 88% 42%, rgba(224, 211, 249, 0.55), transparent 28rem),
    var(--cream);
}

a {
  color: inherit;
}

.page-glow {
  position: fixed;
  z-index: -1;
  width: 20rem;
  height: 20rem;
  border-radius: 50%;
  filter: blur(72px);
  opacity: 0.45;
  pointer-events: none;
}

.page-glow--one {
  top: 18%;
  left: -8rem;
  background: #f5aac0;
}

.page-glow--two {
  right: -8rem;
  bottom: 8%;
  background: #cbb8f2;
}

.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 50%;
  display: flex;
  width: min(1120px, calc(100% - 2rem));
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
  color: #fff;
  transform: translateX(-50%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 0.82rem;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.8rem;
  height: 2.8rem;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(10px);
}

.date-chip {
  padding: 0.55rem 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 999px;
  background: rgba(42, 28, 34, 0.16);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  backdrop-filter: blur(10px);
}

.hero {
  position: relative;
  display: grid;
  min-height: 100svh;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
}

.hero-photo,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-photo {
  z-index: -3;
  background: url("assets/cover.webp") center 48% / cover no-repeat;
  transform: scale(1.03);
  animation: breathe 18s ease-in-out infinite alternate;
}

.hero-shade {
  z-index: -2;
  background:
    linear-gradient(180deg, rgba(40, 24, 31, 0.26), rgba(55, 30, 40, 0.42)),
    linear-gradient(90deg, rgba(112, 50, 72, 0.24), transparent 55%);
}

.hero::after {
  position: absolute;
  right: -12%;
  bottom: -1px;
  left: -12%;
  height: 8rem;
  border-radius: 50% 50% 0 0 / 35% 35% 0 0;
  background: var(--cream);
  content: "";
  transform: translateY(64%);
}

.hero-content {
  width: min(960px, calc(100% - 2rem));
  padding: 7rem 0 8rem;
  color: #fff;
  text-align: center;
  text-shadow: 0 2px 24px rgba(43, 23, 31, 0.4);
}

.eyebrow {
  margin: 0 0 1.15rem;
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: clamp(0.72rem, 2vw, 0.88rem);
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.eyebrow--dark {
  color: var(--rose-dark);
}

.hero h1 {
  display: flex;
  margin: 0;
  align-items: center;
  justify-content: center;
  gap: clamp(0.7rem, 3vw, 2rem);
  font-size: clamp(2.6rem, 9vw, 7.6rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.92;
}

.heart-wrap {
  display: grid;
  width: clamp(3.2rem, 8vw, 6.4rem);
  height: clamp(3.2rem, 8vw, 6.4rem);
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  box-shadow: 0 16px 40px rgba(88, 31, 52, 0.25);
  backdrop-filter: blur(12px);
}

.heart-wrap img {
  width: 52%;
  height: 52%;
  filter: brightness(0) invert(1);
  object-fit: contain;
}

.hero-copy {
  margin: 1.8rem auto 2rem;
  font-size: clamp(1rem, 2.2vw, 1.3rem);
  letter-spacing: 0.12em;
}

.love-button {
  display: inline-block;
  padding: 0.9rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.52);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  box-shadow: 0 12px 40px rgba(58, 23, 36, 0.2);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 0.86rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-decoration: none;
  backdrop-filter: blur(14px);
  transition: background 180ms ease, transform 180ms ease;
}

.love-button:hover,
.love-button:focus-visible {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: rgba(255, 255, 255, 0.88);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  transform: translateX(-50%);
}

.scroll-hint span {
  display: block;
  width: 1px;
  height: 2rem;
  background: currentColor;
}

.story {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(5rem, 10vw, 9rem) 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 2.5rem;
}

.section-heading h2,
.letter h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4.1rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1.18;
}

.time-card {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(13rem, 0.5fr);
  gap: 2rem;
  align-items: center;
  padding: clamp(1.6rem, 4vw, 3.2rem);
  border: 1px solid var(--line);
  border-radius: 2rem;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.card-kicker,
.letter-date {
  margin: 0 0 0.7rem;
  color: var(--rose-dark);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

#together-time {
  display: block;
  font-size: clamp(1.7rem, 4vw, 3.4rem);
  font-variant-numeric: tabular-nums;
  line-height: 1.25;
}

.temporary-note {
  max-width: 44rem;
  margin: 1rem 0 0;
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 0.86rem;
  line-height: 1.75;
}

.initials {
  display: flex;
  min-height: 9rem;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  border-radius: 1.5rem;
  color: var(--rose-dark);
  background: linear-gradient(135deg, var(--blush), var(--lavender));
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 800;
}

.initials b {
  color: var(--rose);
  animation: heartbeat 1.8s ease-in-out infinite;
}

.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

.promise-card {
  min-height: 16rem;
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: rgba(255, 255, 255, 0.6);
}

.promise-card--accent {
  background: linear-gradient(145deg, #f6d5e0, #eee6fa);
}

.promise-number {
  color: var(--rose);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 0.76rem;
  font-weight: 800;
}

.promise-card h3 {
  margin: 3.4rem 0 0.8rem;
  font-size: 1.45rem;
  font-weight: 600;
}

.promise-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
}

.letter {
  padding: clamp(2rem, 6vw, 6rem) 1rem clamp(6rem, 11vw, 10rem);
}

.letter-paper {
  position: relative;
  width: min(820px, 100%);
  margin: 0 auto;
  padding: clamp(2rem, 7vw, 5.5rem);
  overflow: hidden;
  border: 1px solid rgba(111, 62, 79, 0.12);
  border-radius: 0.4rem;
  background: #fffdf9;
  box-shadow: var(--shadow);
}

.letter-paper::before {
  position: absolute;
  top: -4rem;
  right: -4rem;
  width: 11rem;
  height: 11rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(225, 100, 139, 0.2), transparent 68%);
  content: "";
}

.letter-paper > p:not(.letter-date, .signature) {
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.12rem);
  line-height: 2;
}

.signature {
  margin: 2.6rem 0 0 auto;
  color: var(--rose-dark);
  text-align: right;
  line-height: 1.8;
}

.signature strong {
  font-size: 1.35rem;
  font-weight: 600;
}

.site-footer {
  padding: 2rem 1rem 3rem;
  color: var(--muted);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 0.78rem;
  text-align: center;
}

.site-footer p {
  margin: 0.4rem 0;
}

.attribution {
  opacity: 0.7;
}

@keyframes breathe {
  from { transform: scale(1.03); }
  to { transform: scale(1.09); }
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  14% { transform: scale(1.18); }
  28% { transform: scale(1); }
}

@media (max-width: 760px) {
  .site-header {
    padding-top: 1rem;
  }

  .brand {
    font-size: 0.7rem;
  }

  .brand-mark {
    width: 2.35rem;
    height: 2.35rem;
  }

  .date-chip {
    font-size: 0.62rem;
  }

  .hero h1 {
    flex-direction: column;
    gap: 0.45rem;
  }

  .time-card {
    grid-template-columns: 1fr;
  }

  .initials {
    min-height: 7rem;
  }

  .promise-grid {
    grid-template-columns: 1fr;
  }

  .promise-card {
    min-height: 13rem;
  }

  .scroll-hint {
    bottom: 1.3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}