:root {
  --ink: #173f3a;
  --ink-soft: #53706b;
  --paper: #f4f0e7;
  --accent: #df7958;
  --line: rgba(23, 63, 58, 0.2);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 86% 12%, rgba(223, 121, 88, 0.16), transparent 28rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.45), transparent 45%),
    var(--paper);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 4rem 4rem;
  content: "";
  opacity: 0.22;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}

.shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 24rem);
  min-height: calc(100vh - 5rem);
  padding: clamp(1.5rem, 4vw, 4rem);
  gap: clamp(2rem, 5vw, 6rem);
}

.hero {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 65vh;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  letter-spacing: 0.12em;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  color: var(--paper);
  background: var(--ink);
  border-radius: 50%;
  font-size: 0.85rem;
}

.hero-copy {
  max-width: 54rem;
  padding-block: 5rem;
}

.eyebrow,
.note-label {
  margin: 0 0 1.5rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.22em;
}

h1 {
  margin: 0;
  font-family: "Noto Serif TC", "PMingLiU", serif;
  font-size: clamp(3.7rem, 10vw, 9rem);
  font-weight: 600;
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.lead {
  max-width: 35rem;
  margin: 2rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.6vw, 1.3rem);
  line-height: 1.9;
}

.status {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

.status-dot {
  width: 0.65rem;
  height: 0.65rem;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(223, 121, 88, 0.55);
  animation: pulse 2.4s infinite;
}

.note {
  align-self: end;
  padding: 2rem;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
  background: rgba(244, 240, 231, 0.72);
  backdrop-filter: blur(8px);
}

.note-number {
  margin: 0 0 5rem;
  color: var(--accent);
  font-family: Georgia, serif;
  font-size: 3rem;
}

.note p:last-child {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.8;
}

footer {
  display: flex;
  justify-content: space-between;
  min-height: 5rem;
  padding: 1.5rem clamp(1.5rem, 4vw, 4rem);
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

footer p {
  margin: 0;
}

@keyframes pulse {
  70% { box-shadow: 0 0 0 0.7rem rgba(223, 121, 88, 0); }
  100% { box-shadow: 0 0 0 0 rgba(223, 121, 88, 0); }
}

@media (max-width: 760px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 68vh;
  }

  .note-number {
    margin-bottom: 2rem;
  }

  footer {
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .status-dot {
    animation: none;
  }
}