:root {
  --bg: #fef6f0;
  --bg2: #fdf1e5;
  --card: #ffffff;
  --text: #2c2b40;
  --muted: #5a5a6a;
  --border: #ececf2;
  --shadow: 0 12px 30px rgba(20, 20, 60, 0.08);
  --primary: #2c2b40;
  --primaryText: #ffffff;
  --danger: #b00020;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(to bottom, var(--bg), var(--bg2));
}

.container {
  width: min(980px, 92vw);
  margin: 0 auto;
}

.site-header {
  padding: 44px 0 18px;
  text-align: center;
}

.site-header h1 {
  margin: 0;
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 12px auto 0;
  max-width: 62ch;
  color: var(--muted);
}

main {
  padding: 10px 0 34px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow);
  margin: 14px 0;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.template-list {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.template-card {
  flex: 1 1 340px;
  text-align: left;
  border: 2px solid transparent;
  border-radius: 16px;
  padding: 14px;
  background: #fafafe;
  cursor: pointer;
  transition: border-color 120ms ease, transform 120ms ease;
}

.template-card:hover {
  transform: translateY(-1px);
}

.template-card.selected {
  border-color: var(--primary);
}

.template-title {
  font-weight: 700;
}

.template-desc {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.95rem;
}

.file-input {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  user-select: none;
}

.file-input input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.file-input span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 999px;
  background: #f2f2fb;
  border: 1px solid var(--border);
  cursor: pointer;
  font-weight: 600;
}

.help {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

.photo-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.photo-slot {
  position: relative;
  aspect-ratio: 1 / 1;
  border: 2px dashed #d6d6e6;
  border-radius: 14px;
  overflow: hidden;
  background: #fcfcff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #8a8aa5;
  font-weight: 600;
}

.photo-slot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.slot-index {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(0, 0, 0, 0.55);
  color: #ffffff;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
}

.form-row {
  margin: 12px 0;
}

label {
  display: block;
  margin-bottom: 6px;
  font-weight: 700;
}

input[type="text"],
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 1rem;
}

.primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 10px;
  padding: 12px 16px;
  border-radius: 999px;
  border: none;
  background: var(--primary);
  color: var(--primaryText);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.primary-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.status {
  margin-top: 12px;
  color: var(--muted);
}

.status.error {
  color: var(--danger);
}

.preview-book {
  display: grid;
  gap: 12px;
}

.page-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px;
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 12px;
  align-items: start;
}

.page-card img {
  width: 180px;
  height: 180px;
  border-radius: 14px;
  object-fit: cover;
  background: #f3f3fb;
}

.page-title {
  font-weight: 800;
  margin: 0 0 6px;
}

.page-caption {
  margin: 0;
  color: #44445a;
}

.site-footer {
  padding: 18px 0 40px;
  text-align: center;
  color: var(--muted);
}

@media (max-width: 740px) {
  .photo-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-card img {
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
  }
}