*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:        #1a1a2e;
  --accent:      #1a73e8;
  --accent-dark: #1557b0;
  --text:        #1f2937;
  --text-muted:  #6b7280;
  --border:      #e5e7eb;
  --bg:          #f9fafb;
  --white:       #ffffff;
  --danger:      #c62828;
  --success:     #2e7d32;
  --warning:     #e65100;
  --radius:      6px;
  --font:        -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body { font-family: var(--font); background: var(--bg); color: var(--text); font-size: 15px; min-height: 100vh; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; }

/* ── Admin Nav ── */
.admin-nav {
  background: var(--navy);
  color: #fff;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 54px;
  position: sticky;
  top: 0;
  z-index: 50;
}
.admin-nav .brand { font-size: 16px; font-weight: 700; color: #fff; }
.admin-nav .brand span { color: var(--accent); }
.admin-nav-links { display: flex; gap: 4px; }
.admin-nav-links a {
  color: #d1d5db;
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 13px;
}
.admin-nav-links a:hover, .admin-nav-links a.active { color: #fff; background: rgba(255,255,255,.1); text-decoration: none; }
.admin-nav-links a.danger { color: #fca5a5; }
.admin-nav-links a.danger:hover { background: rgba(239,68,68,.2); }

/* ── Container ── */
.admin-wrap { max-width: 1100px; margin: 0 auto; padding: 28px 20px 60px; }

/* ── Page Header ── */
.page-hdr { margin-bottom: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.page-hdr h1 { font-size: 22px; }

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: opacity .15s;
}
.btn:hover { opacity: .88; text-decoration: none; }
.btn-primary  { background: var(--accent);   color: #fff; }
.btn-success  { background: var(--success);  color: #fff; }
.btn-danger   { background: var(--danger);   color: #fff; }
.btn-warning  { background: var(--warning);  color: #fff; }
.btn-secondary{ background: #6b7280;         color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* ── Flash ── */
.flash {
  color: #fff;
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 14px;
}

/* ── Cards ── */
.card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.card-title { font-size: 15px; font-weight: 600; margin-bottom: 14px; color: var(--navy); }

/* ── Stats Bar ── */
.stats-bar { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-bottom: 24px; }
@media (min-width: 600px) { .stats-bar { grid-template-columns: repeat(4, 1fr); } }
.stat-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; text-align: center; }
.stat-card .num { font-size: 28px; font-weight: 700; color: var(--accent); }
.stat-card .lbl { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ── Table ── */
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th { text-align: left; padding: 10px 12px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); background: var(--bg); border-bottom: 2px solid var(--border); }
.data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #f9fafb; }
.table-wrap { overflow-x: auto; }

/* ── Status Badge ── */
.badge { display: inline-block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .4px; padding: 2px 8px; border-radius: 20px; }
.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef9c3; color: #854d0e; }
.badge-danger  { background: #fee2e2; color: #991b1b; }

/* ── Forms ── */
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-control {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  transition: border-color .15s;
}
.form-control:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(26,115,232,.12); }
textarea.form-control { min-height: 200px; resize: vertical; font-family: monospace; font-size: 13px; }
.form-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ── Section Divider ── */
.section-div { border: none; border-top: 2px solid var(--border); margin: 28px 0; }
.section-label { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); margin-bottom: 16px; }

/* ── Book Form Grid ── */
.books-form-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
@media (min-width: 700px) { .books-form-grid { grid-template-columns: repeat(3, 1fr); } }
.book-form-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; background: var(--bg); }
.book-form-card .book-num { font-size: 12px; font-weight: 700; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }

/* ── Toggle ── */
.toggle-wrap { display: flex; align-items: center; gap: 10px; }
.toggle { position: relative; display: inline-block; width: 44px; height: 24px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: #d1d5db;
  border-radius: 24px;
  transition: .2s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: #fff;
  border-radius: 50%;
  transition: .2s;
}
.toggle input:checked + .toggle-slider { background: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

/* ── Log Table ── */
.log-entry { font-size: 12px; font-family: monospace; }
.log-success { color: var(--success); }
.log-error   { color: var(--danger); }
.log-skipped { color: var(--text-muted); }

/* ── Login Page ── */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--navy); }
.login-card { background: var(--white); border-radius: 10px; padding: 40px; width: 100%; max-width: 380px; box-shadow: 0 20px 50px rgba(0,0,0,.3); }
.login-logo { text-align: center; margin-bottom: 28px; font-size: 20px; font-weight: 700; color: var(--navy); }
.login-logo span { color: var(--accent); }
.login-card h2 { font-size: 16px; text-align: center; color: var(--text-muted); margin-bottom: 24px; font-weight: 400; }