:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --accent: #3b82f6;
  --border: #e2e4e9;
  --danger: #dc2626;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); }

.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.login-box {
  background: var(--card);
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  width: 320px;
}
.login-box h1 { margin: 0 0 4px; }
.subtitle { color: var(--muted); margin-top: 0; }
.login-box label { display: block; margin-top: 14px; font-size: 14px; }
.login-box input, textarea, .form-card input[type="text"] {
  width: 100%;
  padding: 8px 10px;
  margin-top: 4px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}
button {
  cursor: pointer;
  border: none;
  border-radius: 6px;
  padding: 9px 16px;
  background: var(--accent);
  color: white;
  font-size: 14px;
}
button.danger { background: var(--danger); }
.error { color: var(--danger); font-size: 14px; }

.admin-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.admin-nav .brand { font-weight: 700; text-decoration: none; color: var(--text); }
.admin-nav nav { display: flex; gap: 16px; align-items: center; }
.logout-form { margin: 0; }
.logout-form button { background: transparent; color: var(--muted); border: 1px solid var(--border); }

.admin-main { max-width: 1000px; margin: 0 auto; padding: 32px 24px; }
.admin-main.narrow { max-width: 640px; }

.flipbook-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 10px; overflow: hidden; }
.flipbook-table th, .flipbook-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: 14px; }
.muted { color: var(--muted); font-size: 12px; }
.actions a { margin-right: 10px; }

.status { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; text-transform: capitalize; }
.status-ready { background: #dcfce7; color: #166534; }
.status-queued { background: #fef9c3; color: #854d0e; }
.status-processing { background: #dbeafe; color: #1e40af; }
.status-error { background: #fee2e2; color: #991b1b; }

.form-card { background: var(--card); border-radius: 10px; padding: 20px; margin-bottom: 20px; }
.form-card h2 { margin-top: 0; font-size: 16px; }
.form-card label { display: block; margin-bottom: 14px; font-size: 14px; }
.form-card label.checkbox { display: flex; align-items: center; gap: 8px; }
.form-card input[type="color"] { width: 60px; height: 32px; padding: 0; border: none; }

.hint { color: #166534; background: #dcfce7; padding: 8px 12px; border-radius: 6px; font-size: 13px; }
.link-button { background: transparent; color: var(--accent); border: none; padding: 4px 0; font-size: 13px; text-decoration: underline; }
.resend-form { text-align: center; margin-top: 12px; }
code { background: var(--bg); padding: 2px 6px; border-radius: 4px; font-size: 13px; }