:root {
  color-scheme: light;
  --color-bg: #f7f5f0;
  --color-surface: #ffffff;
  --color-border: #e2ddd3;
  --color-text: #2b2622;
  --color-muted: #726c62;
  --color-primary: #8a5a44;
  --color-primary-dark: #6f4635;
  --color-danger: #b3432b;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  text-decoration: none;
}

.site-header nav a {
  margin-left: 1.25rem;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.site-header nav a:hover {
  text-decoration: underline;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.page-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

h1 {
  margin: 0;
}

.empty-state {
  text-align: center;
  color: var(--color-muted);
  padding: 3rem 1rem;
}

.book-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.book-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
}

.book-card-thumb {
  width: 44px;
  height: 60px;
  flex-shrink: 0;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.book-card-thumb-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--color-muted);
}

.book-card-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.book-title {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-text);
  text-decoration: none;
}

.book-title:hover {
  text-decoration: underline;
}

.book-author {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.book-card-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.book-card-actions form {
  margin: 0;
}

.status-badge {
  display: inline-block;
  align-self: flex-start;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: #ece5da;
  color: var(--color-primary-dark);
  text-transform: capitalize;
}

.status-finished { background: #dcecdc; color: #2f6b2f; }
.status-started { background: #dde6f5; color: #2f4f8a; }
.status-owned { background: #f2ecd8; color: #8a6d2f; }
.status-abandoned { background: #f2dede; color: #a13c3c; }

.library-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--color-primary);
  text-decoration: none;
}

.library-link:hover {
  text-decoration: underline;
}

.library-link-row {
  margin: -0.5rem 0 1.5rem;
}

.book-details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin: 0;
}

.book-details dt {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 1rem;
}

.book-details dt:first-child {
  margin-top: 0;
}

.book-details dd {
  margin: 0.15rem 0 0;
}

.cover-image {
  max-width: 160px;
  border-radius: 6px;
  display: block;
}

.cover-preview {
  max-width: 120px;
  border-radius: 6px;
  display: block;
  margin-bottom: 0.4rem;
  border: 1px solid var(--color-border);
}

.hint {
  color: var(--color-muted);
  margin-top: -0.5rem;
}

.notice-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.notice {
  margin: 0;
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  background: #fdf3d9;
  border: 1px solid #edd9a0;
  color: #6b5310;
  font-size: 0.9rem;
}

.book-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.5rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field label {
  font-weight: 600;
  font-size: 0.9rem;
}

.field input,
.field select,
.field textarea {
  font-size: 1rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: #fffdfa;
  font-family: inherit;
}

.field-error {
  color: var(--color-danger);
  font-size: 0.85rem;
  margin: 0;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
}

.button.primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.button.primary:hover {
  background: var(--color-primary-dark);
}

.button.danger {
  color: var(--color-danger);
  border-color: var(--color-danger);
  background: transparent;
}

.button.danger:hover {
  background: #fbeceb;
}