:root {
  color-scheme: light;
  --bg: #f4f5fb;
  --surface: #ffffff;
  --soft: #eceefa;
  --text: #20213d;
  --muted: #6a6d87;
  --border: #dfe1ec;
  --primary: #4038a8;
  --success: #16734a;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
button, input, select, textarea { min-height: 44px; padding: .7rem .85rem; font: inherit; border: 1px solid var(--border); border-radius: 10px; }
button { color: var(--text); background: var(--surface); cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .55; }
input, select, textarea { width: 100%; color: var(--text); background: var(--surface); }
button:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid #918cf0; outline-offset: 2px; }
.primary { color: white; background: var(--primary); border-color: var(--primary); }
.brand-header { display: grid; justify-items: center; gap: 3px; padding: 18px; text-align: center; background: var(--surface); border-bottom: 1px solid var(--border); }
.brand-link { display: grid; justify-items: center; gap: 3px; color: inherit; text-decoration: none; }
.brand-link img { width: min(135px, 42vw); height: auto; }
.brand-link strong { font-size: 1.2rem; font-weight: 600; }
.brand-link span, .muted { color: var(--muted); }
.session-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px max(1rem, calc((100vw - 980px) / 2)); background: var(--surface); border-bottom: 1px solid var(--border); }
.session-bar form { margin: 0; }
.session-actions { display: flex; align-items: center; gap: 14px; }
.session-actions a, .secondary-link { color: var(--primary); text-decoration: none; }
.link-button { min-height: auto; padding: 5px 8px; color: var(--primary); border: 0; }
.page-shell { width: min(100% - 2rem, 980px); margin: 24px auto; }
.panel { padding: 20px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; box-shadow: 0 12px 32px rgba(32, 33, 61, .06); }
.panel h1, .panel h2, .panel p { margin-top: 0; }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.section-heading h1 { margin-bottom: 3px; }
.test-badge, .rule-row span { padding: 6px 9px; border-radius: 999px; background: var(--soft); color: var(--muted); font-size: .88rem; }
.login-panel { width: min(100%, 440px); margin: 50px auto; }
.login-panel form, .login-panel label { display: grid; gap: 8px; }
.login-panel form { gap: 16px; }
.error { padding: 10px; border-radius: 8px; color: #8e2530; background: #ffe8eb; }
.module-grid, .action-grid, .step-grid { display: grid; gap: 12px; }
.module-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.module-card { display: grid; gap: 6px; min-height: 105px; padding: 16px; color: var(--text); text-decoration: none; background: var(--soft); border: 1px solid transparent; border-radius: 12px; }
.module-card span, .step-grid small { color: var(--muted); }
.module-card.active { background: var(--surface); border-color: var(--primary); }
.scan-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; }
.action-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 14px 0; }
.action-button { display: grid; place-items: center; min-height: 44px; padding: .7rem .85rem; color: var(--text); text-align: center; text-decoration: none; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; }
.action-button.active { border-color: var(--primary); }
.workspace-card { padding: 16px; background: var(--bg); border: 1px solid var(--border); border-radius: 14px; }
.workspace-card h2 { font-size: 1.05rem; }
.step-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.step-grid > div { display: grid; gap: 5px; padding: 14px; background: var(--surface); border-radius: 10px; }
.step-grid span { color: var(--muted); }
.rule-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.message-list { display: grid; gap: 8px; margin-bottom: 14px; }
.message { padding: 12px 14px; border: 1px solid #b8dfcb; border-radius: 10px; color: #0f6040; background: #e8f8ef; }
.message.warning { color: #7a4b00; background: #fff3d6; border-color: #ecd18d; }
.form-panel { max-width: 860px; margin-inline: auto; }
.data-form, .field { display: grid; gap: 7px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.field-wide { grid-column: 1 / -1; }
.field label { font-weight: 650; }
.field small { color: var(--muted); }
.field[hidden] { display: none; }
.field-error { color: #8e2530; font-size: .9rem; }
.form-actions { display: flex; align-items: center; justify-content: flex-end; gap: 16px; margin-top: 20px; }
.primary-link { display: inline-flex; align-items: center; min-height: 42px; padding: 9px 13px; color: white; text-decoration: none; background: var(--primary); border-radius: 10px; }
.search-form { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; margin-bottom: 18px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; background: var(--surface); }
th, td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-size: .88rem; background: var(--bg); }
tbody tr:last-child td { border-bottom: 0; }
td a { color: var(--primary); font-weight: 650; text-decoration: none; }
.empty-state { padding: 30px; color: var(--muted); text-align: center; }
.book-metadata { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin: 0 0 24px; }
.book-metadata div { min-width: 0; padding: 12px; background: var(--bg); border-radius: 10px; }
.book-metadata dt { color: var(--muted); font-size: .85rem; }
.book-metadata dd { margin: 4px 0 0; overflow-wrap: anywhere; word-break: break-word; font-weight: 650; }
.status-badge { display: inline-flex; padding: 5px 8px; color: var(--success); background: #e8f8ef; border-radius: 999px; font-size: .86rem; }
.subheading-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.button-row { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 12px; }
.warning-box, .info-box { margin-bottom: 18px; padding: 13px 15px; border-radius: 10px; }
.warning-box { color: #7a4b00; background: #fff3d6; border: 1px solid #ecd18d; }
.info-box { color: var(--text); background: var(--soft); border: 1px solid var(--border); }
.nfc-reader-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; }
.nfc-reader-row input[readonly] { background: var(--bg); }
.nfc-reader-status { padding: 10px 12px; color: var(--muted); background: var(--bg); border: 1px solid var(--border); border-radius: 10px; }
.nfc-reader-status[data-state="success"] { color: var(--success); background: #e8f8ef; border-color: #b8dfcb; }
.nfc-reader-status[data-state="error"] { color: #8e2530; background: #ffe8eb; border-color: #efbdc3; }
.person-summary { display: grid; grid-template-columns: 180px minmax(0, 1fr); align-items: start; gap: 20px; margin-bottom: 24px; }
.person-summary .book-metadata { grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0; }
.photo-frame { display: grid; place-items: center; width: 180px; aspect-ratio: 4 / 5; overflow: hidden; color: var(--muted); background: var(--bg); border: 1px solid var(--border); border-radius: 14px; }
.photo-frame img { width: 100%; height: 100%; object-fit: cover; }
.status-lost, .status-blocked, .status-replaced { color: #7a4b00; background: #fff3d6; }
.pagination { display: flex; align-items: center; justify-content: center; gap: 16px; margin-top: 18px; }
.pagination a { color: var(--primary); font-weight: 650; text-decoration: none; }
.filter-row { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 16px; }
.overdue-row { background: #fff5f5; }
.status-overdue { color: #8e2530; background: #ffe8eb; }
.status-due { color: #7a4b00; background: #fff3d6; }
.loan-actions { justify-content: flex-start; margin: 4px 0 24px; }
.loan-actions form { margin: 0; }
.loan-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 18px 0; }
.loan-summary a { display: grid; gap: 7px; padding: 15px; color: var(--text); text-decoration: none; background: var(--bg); border: 1px solid var(--border); border-radius: 12px; }
.loan-summary span { color: var(--muted); }
.loan-summary strong { font-size: 1.7rem; }
.loan-summary .summary-alert { color: #8e2530; background: #fff5f5; border-color: #efbdc3; }
.loan-followup { margin-bottom: 18px; }
.book-profile { display: grid; grid-template-columns: 150px minmax(0, 1fr); align-items: start; gap: 18px; margin-bottom: 24px; }
.book-profile .book-metadata { grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0; }
.book-cover-frame, .loan-cover, .current-cover { display: grid; place-items: center; overflow: hidden; color: var(--muted); background: var(--bg); border: 1px solid var(--border); border-radius: 12px; }
.book-cover-frame { width: 150px; aspect-ratio: 2 / 3; }
.book-cover-frame img, .loan-cover img, .current-cover img { width: 100%; height: 100%; object-fit: cover; }
.loan-profile { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: start; gap: 16px; }
.loan-profile .book-metadata { margin-bottom: 24px; }
.loan-cover { width: 110px; aspect-ratio: 2 / 3; }
.current-cover { width: 140px; aspect-ratio: 2 / 3; margin-bottom: 18px; }
.session-warning-overlay { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 20px; background: rgba(20, 21, 45, .58); }
.session-warning-overlay[hidden] { display: none; }
.session-warning { width: min(100%, 430px); padding: 24px; text-align: center; background: var(--surface); border-radius: 16px; box-shadow: 0 20px 60px rgba(20, 21, 45, .28); }
.session-warning h2 { margin-top: 0; }
.session-warning .button-row { justify-content: center; }
@media (max-width: 620px) {
  .module-grid, .action-grid, .step-grid, .scan-row, .form-grid, .search-form, .book-metadata, .person-summary, .person-summary .book-metadata, .nfc-reader-row, .loan-summary, .book-profile, .book-profile .book-metadata, .loan-profile { grid-template-columns: 1fr; }
  .photo-frame { width: min(180px, 100%); }
  .field-wide { grid-column: auto; }
  .section-heading { align-items: flex-start; }
  .session-bar { align-items: flex-start; }
  .session-actions { align-items: flex-end; flex-direction: column; gap: 4px; }
}