:root {
    --purple: #6b4fa0;
    --purple-mid: #8b6fc0;
    --purple-light: #b39ddb;
    --purple-pale: #ede7f6;
    --purple-xpale: #f5f0fd;
    --text: #2d1f4a;
    --text-muted: #6b5c85;
    --text-light: #9b8fb0;
    --bg: #faf8fe;
    --border: #d8ceed;
    --white: #ffffff;
    --shadow: 0 2px 12px rgba(107,79,160,0.10);
    --green-bg: #e8f5e9; --green-text: #2e7d32;
    --amber-bg: #fff8e1; --amber-text: #7b5c00;
    --gray-bg:  #f0ecf8;  --gray-text:  #4a3a6a;
}

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

body {
    font-family: 'Source Sans 3', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Navbar ── */
.navbar {
    background: var(--purple);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky; top: 0; z-index: 100;
    box-shadow: 0 2px 8px rgba(107,79,160,0.3);
}
.nav-brand {
    font-family: 'Playfair Display', serif;
    font-size: 1.25rem;
    color: #fff;
    text-decoration: none;
    font-weight: 700;
}
.nav-links a {
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    margin-left: 1.5rem;
    font-size: 0.95rem;
    transition: color 0.2s;
}
.nav-links a:hover { color: #fff; }

/* ── Flash ── */
.flash { padding: 0.75rem 2rem; text-align: center; font-weight: 600; font-size: 0.95rem; }
.flash-success { background: #ede7f6; color: #4a148c; border-bottom: 2px solid var(--purple-light); }
.flash-error   { background: #fce4ec; color: #880e4f; border-bottom: 2px solid #f48fb1; }

/* ── Hero ── */
.hero {
    text-align: center;
    padding: 3rem 2rem 2rem;
    background: linear-gradient(135deg, var(--purple) 0%, var(--purple-mid) 100%);
    color: #fff;
}
.hero h1 { font-family: 'Playfair Display', serif; font-size: 2.4rem; margin-bottom: 0.5rem; }
.hero p  { font-size: 1.05rem; opacity: 0.9; }

/* ── Filter bar ── */
.filter-bar {
    display: flex; gap: 0.75rem; padding: 1.25rem 2rem;
    flex-wrap: wrap; align-items: center;
    border-bottom: 1px solid var(--border);
    background: var(--white);
}
.filter-btn {
    padding: 0.4rem 1rem;
    border: 2px solid var(--border);
    border-radius: 20px;
    background: var(--white);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: all 0.2s;
    font-family: 'Source Sans 3', sans-serif;
}
.filter-btn:hover, .filter-btn.active {
    background: var(--purple);
    color: #fff;
    border-color: var(--purple);
}
#genre-filter {
    padding: 0.4rem 0.75rem;
    border: 2px solid var(--border);
    border-radius: 20px;
    background: var(--white);
    font-size: 0.9rem;
    cursor: pointer;
    margin-left: auto;
    color: var(--text);
    font-family: 'Source Sans 3', sans-serif;
}

/* ── Book grid ── */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem; padding: 2rem;
    max-width: 1200px; margin: 0 auto; width: 100%;
}
.book-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex; flex-direction: column;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border);
}
.book-card:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(107,79,160,0.15); }
.book-cover { height: 160px; overflow: hidden; background: var(--purple-pale); }
.book-cover img { width: 100%; height: 100%; object-fit: cover; }
.cover-placeholder {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--purple-pale), #d1c4e9);
}
.cover-placeholder span {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem; color: var(--purple); font-weight: 700;
}
.book-info { padding: 1rem; display: flex; flex-direction: column; gap: 0.3rem; flex: 1; }
.book-title { font-family: 'Playfair Display', serif; font-size: 1rem; font-weight: 700; line-height: 1.3; color: var(--text); }
.book-author { color: var(--text-muted); font-size: 0.9rem; }
.book-genre {
    display: inline-block; font-size: 0.75rem;
    background: var(--purple-pale); color: var(--purple);
    padding: 0.2rem 0.6rem; border-radius: 10px; width: fit-content; margin-top: 0.2rem;
}
.book-notes { font-size: 0.8rem; color: var(--text-light); font-style: italic; }

/* ── Status badges ── */
.status-badge {
    font-size: 0.75rem; padding: 0.2rem 0.6rem;
    border-radius: 10px; font-weight: 700; width: fit-content;
}
.status-in_library { background: var(--green-bg); color: var(--green-text); }
.status-in_storage { background: var(--amber-bg); color: var(--amber-text); }
.status-archived   { background: var(--gray-bg);  color: var(--gray-text);  }

/* ── Request CTA ── */
.request-cta { text-align: center; padding: 2rem; background: var(--purple-pale); margin-top: 1rem; }
.request-cta p { font-size: 1.05rem; margin-bottom: 0.75rem; color: var(--text-muted); }

/* ── Buttons ── */
.btn-primary {
    background: var(--purple); color: #fff; border: none;
    padding: 0.65rem 1.5rem; border-radius: 8px; font-size: 1rem;
    cursor: pointer; text-decoration: none; display: inline-block;
    transition: background 0.2s; font-family: 'Source Sans 3', sans-serif; font-weight: 600;
}
.btn-primary:hover { background: var(--purple-mid); }
.btn-archive {
    background: #fff3e0; color: #bf360c;
    border: 1.5px solid #ff8a65; padding: 0.3rem 0.75rem; border-radius: 6px;
    cursor: pointer; font-size: 0.82rem; font-weight: 600; white-space: nowrap;
    font-family: 'Source Sans 3', sans-serif; transition: all 0.15s;
}
.btn-archive:hover { background: #ffe0b2; }
.btn-restore {
    background: #e8f5e9; color: #1b5e20;
    border: 1.5px solid #66bb6a; padding: 0.3rem 0.75rem; border-radius: 6px;
    cursor: pointer; font-size: 0.82rem; font-weight: 600; white-space: nowrap;
    font-family: 'Source Sans 3', sans-serif; transition: all 0.15s;
}
.btn-restore:hover { background: #c8e6c9; }
.btn-edit {
    background: var(--purple-pale); color: #4a148c;
    border: 1.5px solid #9c6bc9; padding: 0.3rem 0.75rem; border-radius: 6px;
    cursor: pointer; font-size: 0.82rem; font-weight: 600; white-space: nowrap;
    font-family: 'Source Sans 3', sans-serif; transition: all 0.15s;
}
.btn-edit:hover { background: #d1c4e9; }
.btn-delete {
    background: #ffebee; color: #b71c1c;
    border: 1.5px solid #ef9a9a; padding: 0.3rem 0.75rem; border-radius: 6px;
    cursor: pointer; font-size: 0.82rem; font-weight: 600; white-space: nowrap;
    font-family: 'Source Sans 3', sans-serif; transition: all 0.15s;
}
.btn-delete:hover { background: #ffcdd2; }
.btn-secondary {
    background: #f5f5f5; color: #555;
    border: 1.5px solid #ccc; padding: 0.3rem 0.75rem; border-radius: 6px;
    cursor: pointer; font-size: 0.82rem; font-weight: 600; white-space: nowrap;
    font-family: 'Source Sans 3', sans-serif; transition: all 0.15s;
}
.btn-secondary:hover { background: #e0e0e0; }
.bulk-action-bar {
    display: none; align-items: center; gap: 0.75rem;
    background: #ede7f6; border: 1.5px solid #9c6bc9; border-radius: 8px;
    padding: 0.6rem 1rem; margin-bottom: 0.75rem;
}
.bulk-action-bar.visible { display: flex; }
.bulk-count { font-weight: 600; color: #4a148c; font-size: 0.9rem; margin-right: 0.25rem; }
.cover-input-row { display: flex; gap: 0.5rem; align-items: center; }
.cover-input-row input { flex: 1; }
.btn-find-cover {
    background: #e8eaf6; color: #283593;
    border: 1.5px solid #7986cb; padding: 0.3rem 0.75rem; border-radius: 6px;
    cursor: pointer; font-size: 0.82rem; font-weight: 600; white-space: nowrap;
    font-family: 'Source Sans 3', sans-serif; transition: all 0.15s;
}
.btn-find-cover:hover { background: #c5cae9; }
.cover-preview { display: flex; align-items: center; gap: 0.6rem; margin-top: 0.4rem; min-height: 1.2rem; }
.cover-thumb { height: 72px; border-radius: 4px; border: 1px solid #ddd; box-shadow: 0 1px 4px rgba(0,0,0,0.12); }
.cover-msg { font-size: 0.82rem; color: var(--text-muted); }
.cover-msg.success { color: #2e7d32; font-weight: 600; }
.cover-msg.error   { color: #c62828; }
.btn-fulfill {
    background: #e8f5e9; color: #1b5e20;
    border: 1.5px solid #66bb6a; padding: 0.3rem 0.7rem; border-radius: 6px;
    cursor: pointer; font-size: 0.82rem; font-weight: 600;
    font-family: 'Source Sans 3', sans-serif;
}

/* ── Forms ── */
.form-container, .login-container {
    max-width: 600px; margin: 2rem auto;
    background: var(--white); border-radius: 16px;
    padding: 2rem; box-shadow: var(--shadow);
}
.page-header { text-align: center; padding: 2rem 2rem 1rem; }
.page-header h1 { font-family: 'Playfair Display', serif; font-size: 2rem; color: var(--text); }
.page-header p  { color: var(--text-muted); margin-top: 0.5rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.4rem; font-size: 0.95rem; color: var(--text); }
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 0.6rem 0.9rem;
    border: 2px solid var(--border); border-radius: 8px;
    font-size: 1rem; font-family: 'Source Sans 3', sans-serif;
    color: var(--text); background: var(--white);
    transition: border-color 0.2s;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none; border-color: var(--purple);
}
.optional { color: var(--text-light); font-weight: 400; font-size: 0.85rem; }
.radio-group { display: flex; gap: 1.5rem; flex-wrap: wrap; margin-top: 0.4rem; }
.radio-label { display: flex; align-items: center; gap: 0.4rem; cursor: pointer; font-weight: 400; color: var(--text); }

/* ── Admin layout ── */
.admin-header {
    background: linear-gradient(135deg, var(--purple), var(--purple-mid));
    color: #fff; padding: 2rem; text-align: center;
}
.admin-header h1 { font-family: 'Playfair Display', serif; font-size: 2rem; }
.admin-header p  { opacity: 0.85; margin-top: 0.25rem; }

/* ── Admin tabs ── */
.admin-tabs {
    display: flex; gap: 0; background: var(--white);
    border-bottom: 2px solid var(--border); padding: 0 2rem;
    position: sticky; top: 62px; z-index: 90;
    flex-wrap: wrap;
}
.admin-tab {
    padding: 0.85rem 1.5rem; font-size: 0.95rem; font-weight: 600;
    color: var(--text-muted); cursor: pointer;
    border-bottom: 3px solid transparent; margin-bottom: -2px;
    transition: all 0.2s; white-space: nowrap;
    font-family: 'Source Sans 3', sans-serif; background: none; border-top: none; border-left: none; border-right: none;
}
.admin-tab:hover   { color: var(--purple); }
.admin-tab.active  { color: var(--purple); border-bottom-color: var(--purple); }

.admin-panel { display: none; max-width: 1200px; margin: 0 auto; padding: 2rem; }
.admin-panel.active { display: block; }

.section-title {
    font-family: 'Playfair Display', serif; font-size: 1.4rem;
    color: var(--purple); border-bottom: 2px solid var(--purple-pale);
    padding-bottom: 0.5rem; margin-bottom: 1.25rem;
}

/* ── Admin add form ── */
.admin-form {
    background: var(--purple-xpale); padding: 1.5rem;
    border-radius: 12px; border: 1px solid var(--border); margin-bottom: 2rem;
}
.admin-form .form-group label { color: var(--text); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ── Tables ── */
.admin-table-wrapper { overflow-x: auto; border-radius: 12px; box-shadow: var(--shadow); }
.admin-table { width: 100%; border-collapse: collapse; background: var(--white); }
.admin-table th {
    background: var(--purple); color: #fff;
    padding: 0.75rem 1rem; text-align: left; font-size: 0.88rem; font-weight: 600;
}
.admin-table td {
    padding: 0.75rem 1rem; border-bottom: 1px solid var(--border);
    font-size: 0.88rem; vertical-align: middle; color: var(--text);
}
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: var(--purple-xpale); }
.action-cell { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.inline-form { display: inline; }
.fulfilled-row td { opacity: 0.55; }
.badge-fulfilled { color: var(--purple); font-weight: 700; font-size: 0.85rem; }
.empty-msg { color: var(--text-muted); font-style: italic; text-align: center; padding: 2rem; }

/* ── Edit modal ── */
.modal-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(45,31,74,0.5); z-index: 200;
    align-items: center; justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal {
    background: var(--white); border-radius: 16px; padding: 2rem;
    width: 90%; max-width: 560px; max-height: 90vh; overflow-y: auto;
    box-shadow: 0 8px 40px rgba(107,79,160,0.25);
}
.modal h3 { font-family: 'Playfair Display', serif; font-size: 1.3rem; color: var(--purple); margin-bottom: 1.25rem; }
.modal-close {
    float: right; background: none; border: none; font-size: 1.4rem;
    cursor: pointer; color: var(--text-muted); line-height: 1;
}
.modal-close:hover { color: var(--text); }

/* ── Settings cards ── */
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.settings-card {
    background: var(--white); border-radius: 12px; padding: 1.5rem;
    border: 1px solid var(--border); box-shadow: var(--shadow);
}
.settings-card h4 { font-size: 1rem; font-weight: 700; color: var(--purple); margin-bottom: 1rem; }
.user-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.5rem 0; border-bottom: 1px solid var(--border); font-size: 0.9rem;
    color: var(--text);
}
.user-row:last-of-type { border-bottom: none; }

/* ── Inline select in table ── */
.status-select {
    padding: 0.25rem 0.5rem; border: 1.5px solid var(--border);
    border-radius: 6px; font-size: 0.82rem; color: var(--text);
    font-family: 'Source Sans 3', sans-serif; background: var(--white); cursor: pointer;
}
.status-select:focus { outline: none; border-color: var(--purple); }

/* ── Footer ── */
footer {
    text-align: center; padding: 1.5rem;
    color: var(--text-light); font-size: 0.9rem;
    border-top: 1px solid var(--border); margin-top: auto;
}

@media (max-width: 700px) {
    .form-row { grid-template-columns: 1fr; }
    .book-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; padding: 1rem; }
    .filter-bar { padding: 1rem; }
    .hero h1 { font-size: 1.7rem; }
    .settings-grid { grid-template-columns: 1fr; }
    .admin-tabs { padding: 0 0.5rem; }
    .admin-tab { padding: 0.75rem 0.75rem; font-size: 0.85rem; }
}

/* ── Age badges ── */
.age-badge { display:inline-block; font-size:0.75rem; padding:0.2rem 0.65rem; border-radius:10px; font-weight:700; white-space:nowrap; }
.age-Kids        { background:#c2185b; color:#fff; }
.age-Adult       { background:#4a148c; color:#fff; }

/* ── Price cell ── */
.price-cell { font-variant-numeric: tabular-nums; font-weight:600; color:var(--purple); white-space:nowrap; }

/* ── Inventory filters ── */
.inv-filters {
    display:flex; flex-wrap:wrap; gap:1.25rem; align-items:flex-start;
    background:var(--purple-xpale); border-radius:10px; padding:1rem 1.25rem;
    border:1px solid var(--border); margin-bottom:1.25rem;
}
.inv-filter-group { display:flex; flex-direction:column; gap:0.4rem; }
.filter-label { font-size:0.78rem; font-weight:700; color:var(--text-muted); text-transform:uppercase; letter-spacing:0.05em; }
.filter-pills { display:flex; gap:0.4rem; flex-wrap:wrap; }
.fpill {
    padding:0.28rem 0.85rem; border:1.5px solid var(--border); border-radius:14px;
    background:var(--white); font-size:0.82rem; cursor:pointer; color:var(--text-muted);
    transition:all 0.15s; font-family:'Source Sans 3',sans-serif; font-weight:500;
}
.fpill:hover, .fpill.active { background:var(--purple); color:#fff; border-color:var(--purple); }
.genre-select {
    padding:0.3rem 0.75rem; border:1.5px solid var(--border); border-radius:14px;
    background:var(--white); font-size:0.82rem; color:var(--text);
    font-family:'Source Sans 3',sans-serif; cursor:pointer;
}
.genre-select:focus { outline:none; border-color:var(--purple); }
.filter-count { font-size:0.82rem; color:var(--text-muted); font-style:italic; }

/* ── Stats panel ── */
.stats-cards {
    display:grid; grid-template-columns:repeat(auto-fill,minmax(170px,1fr));
    gap:1rem; margin-bottom:2rem;
}
.stat-card {
    background:var(--white); border-radius:12px; padding:1.1rem 1.25rem;
    border:1px solid var(--border); box-shadow:var(--shadow);
}
.stat-card-highlight { border-color:var(--purple-light); background:var(--purple-pale); }
.stat-label { font-size:0.78rem; font-weight:700; color:var(--text-muted); text-transform:uppercase; letter-spacing:0.04em; margin-bottom:0.4rem; }
.stat-value { font-size:1.75rem; font-weight:700; color:var(--purple); font-family:'Playfair Display',serif; }
.stat-card-highlight .stat-value { color:#4a148c; }

.stats-grid { display:grid; grid-template-columns:1fr 1fr; gap:1.5rem; margin-bottom:1.5rem; }
.stats-section { background:var(--white); border-radius:12px; padding:1.25rem; border:1px solid var(--border); box-shadow:var(--shadow); }
.stats-sub-title { font-size:1rem; font-weight:700; color:var(--purple); margin-bottom:0.75rem; }
.stats-table { width:100%; border-collapse:collapse; font-size:0.88rem; }
.stats-table th { color:var(--text-muted); font-size:0.78rem; text-transform:uppercase; letter-spacing:0.04em; padding:0.4rem 0.6rem; border-bottom:2px solid var(--border); text-align:left; }
.stats-table td { padding:0.5rem 0.6rem; border-bottom:1px solid var(--border); color:var(--text); }
.stats-table tr:last-child td { border-bottom:none; }
.stats-table tr:hover td { background:var(--purple-xpale); }
.stats-total-row td { border-top:2px solid var(--border); border-bottom:none; background:var(--purple-xpale); }

@media (max-width:700px) {
    .stats-grid { grid-template-columns:1fr; }
    .stats-cards { grid-template-columns:1fr 1fr; }
    .inv-filters { gap:0.75rem; padding:0.75rem; }
}