:root {
  --bg: #fafafa;
  --ink: #1a1a1a;
  --muted: #6b7280;
  --card: #ffffff;
  --line: #e5e7eb;
  --radius: 16px;
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

.header {
  text-align: center;
  margin-bottom: 28px;
  opacity: 0;
  transform: translateY(8px);
  animation: rise 0.6s ease-out 0.05s forwards;
}

.header h1 {
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

.subtitle {
  color: var(--muted);
  margin: 0;
}

.photo-card {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 12px 32px rgba(0, 0, 0, 0.06);
  opacity: 0;
  transform: translateY(12px) scale(0.995);
  animation: rise 0.7s ease-out 0.15s forwards;
}

.photo-card img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  background: #eee;
  transition: opacity 0.4s ease;
  opacity: 0;
}

.photo-card img.is-loaded {
  opacity: 1;
}

.caption {
  color: var(--muted);
  font-size: 14px;
  text-align: center;
  padding: 12px 8px 4px;
}

.caption code {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 13px;
}

.notice {
  border: 1px solid #fcd34d;
  background: #fffbeb;
  color: #92400e;
  border-radius: 12px;
  padding: 12px 16px;
  max-width: 640px;
  margin: 20px auto 0;
  text-align: center;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  margin-top: 28px;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 560px) {
  .page {
    padding: 32px 14px 48px;
  }

  .photo-card {
    padding: 10px;
    border-radius: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .header, .photo-card {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .photo-card img {
    transition: none;
    opacity: 1;
  }
}