/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --sidebar-w: 240px;
    --color-bg: #f1f5f9;
    --color-sidebar: #1e293b;
    --color-sidebar-hover: #334155;
    --color-sidebar-active: #2563eb;
    --color-white: #ffffff;
    --color-primary: #2563eb;
    --color-success: #16a34a;
    --color-warning: #d97706;
    --color-danger: #dc2626;
    --color-text: #1e293b;
    --color-muted: #64748b;
    --color-border: #e2e8f0;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ===== LAYOUT ===== */
.app-wrapper { display: flex; min-height: 100vh; }

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-w);
    background: var(--color-sidebar);
    color: #cbd5e1;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    z-index: 100;
    transition: transform .25s ease;
}

.sidebar-logo {
    padding: 20px 24px 16px;
    border-bottom: 1px solid #334155;
}

.sidebar-logo h1 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
}

.sidebar-logo span {
    font-size: 11px;
    color: #64748b;
    letter-spacing: .05em;
    text-transform: uppercase;
}

.sidebar-nav { flex: 1; padding: 16px 0; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 24px;
    color: #94a3b8;
    font-size: 14px;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all .15s ease;
    cursor: pointer;
}

.nav-item:hover {
    background: var(--color-sidebar-hover);
    color: #fff;
}

.nav-item.active {
    background: rgba(37,99,235,.15);
    color: #93c5fd;
    border-left-color: var(--color-primary);
}

.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }

.sidebar-footer {
    padding: 16px 24px;
    border-top: 1px solid #334155;
    font-size: 12px;
    color: #475569;
}

.sidebar-footer a {
    color: #64748b;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: color .15s;
}

.sidebar-footer a:hover { color: #ef4444; }

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: var(--sidebar-w);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 0 32px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar h2 {
    font-size: 18px;
    font-weight: 600;
}

.topbar-actions { display: flex; gap: 10px; align-items: center; }

.page-body { padding: 28px 32px; flex: 1; }

/* ===== CARDS ===== */
.card {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px 24px;
    border-left: 4px solid transparent;
}

.stat-card.total   { border-left-color: var(--color-primary); }
.stat-card.read    { border-left-color: var(--color-success); }
.stat-card.pending { border-left-color: var(--color-warning); }
.stat-card.ongoing { border-left-color: #7c3aed; }

.stat-card .stat-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--color-muted);
    font-weight: 600;
    margin-bottom: 8px;
}

.stat-card .stat-value {
    font-size: 32px;
    font-weight: 700;
    line-height: 1;
}

.stat-card.total .stat-value   { color: var(--color-primary); }
.stat-card.read .stat-value    { color: var(--color-success); }
.stat-card.pending .stat-value { color: var(--color-warning); }
.stat-card.ongoing .stat-value { color: #7c3aed; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all .15s ease;
    line-height: 1;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover { background: #1d4ed8; }

.btn-success {
    background: var(--color-success);
    color: #fff;
}
.btn-success:hover { background: #15803d; }

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}
.btn-danger:hover { background: #b91c1c; }

.btn-outline {
    background: transparent;
    border-color: var(--color-border);
    color: var(--color-text);
}
.btn-outline:hover { background: var(--color-bg); }

.btn-sm { padding: 5px 10px; font-size: 12px; }

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 99px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .03em;
    text-transform: uppercase;
}

.badge-success  { background: #dcfce7; color: #15803d; }
.badge-warning  { background: #fef9c3; color: #a16207; }
.badge-purple   { background: #ede9fe; color: #6d28d9; }
.badge-muted    { background: #f1f5f9; color: #475569; }

/* ===== TABLE ===== */
.table-wrapper {
    overflow-x: auto;
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    padding: 12px 16px;
    text-align: left;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--color-muted);
    background: #f8fafc;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

tbody tr {
    border-bottom: 1px solid var(--color-border);
    transition: background .1s;
}

tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #f8fafc; }

tbody td {
    padding: 12px 16px;
    vertical-align: middle;
}

.book-title { font-weight: 600; color: var(--color-text); }
.book-author { font-size: 12px; color: var(--color-muted); }

/* ===== FILTERS BAR ===== */
.filters-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-bottom: 20px;
}

.search-input {
    flex: 1;
    min-width: 200px;
    padding: 8px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    background: var(--color-white);
    outline: none;
    transition: border-color .15s;
}

.search-input:focus { border-color: var(--color-primary); }

.filter-select {
    padding: 8px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    background: var(--color-white);
    outline: none;
    cursor: pointer;
}

.filter-select:focus { border-color: var(--color-primary); }

/* ===== FORMS ===== */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-grid.full { grid-template-columns: 1fr; }

.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-group.span2 { grid-column: span 2; }

label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
}

.form-control {
    padding: 9px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    outline: none;
    transition: border-color .15s;
    width: 100%;
}

.form-control:focus { border-color: var(--color-primary); }

.form-hint { font-size: 12px; color: var(--color-muted); }

/* ===== ALERTS ===== */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 14px;
    border: 1px solid transparent;
}

.alert-success { background: #dcfce7; color: #166534; border-color: #bbf7d0; }
.alert-danger  { background: #fee2e2; color: #991b1b; border-color: #fecaca; }
.alert-info    { background: #dbeafe; color: #1e40af; border-color: #bfdbfe; }

/* ===== CHARTS ===== */
.charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    margin-top: 24px;
}

.chart-card {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
}

.chart-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-text);
}

.chart-container { position: relative; }

/* Support list */
.support-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }

.support-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.support-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.support-name { flex: 1; font-weight: 500; }
.support-count { font-weight: 700; color: var(--color-text); }
.support-bar-wrap { flex: 2; background: #f1f5f9; border-radius: 99px; height: 6px; overflow: hidden; }
.support-bar { height: 100%; border-radius: 99px; }

/* ===== LOGIN PAGE ===== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

.login-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,.3);
    padding: 40px;
    width: 100%;
    max-width: 380px;
}

.login-card h1 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 4px;
}

.login-card p { color: var(--color-muted); font-size: 13px; margin-bottom: 28px; }

.login-card .form-group { margin-bottom: 16px; }
.login-card .btn { width: 100%; justify-content: center; padding: 11px; font-size: 15px; margin-top: 8px; }

/* ===== PAGINATION ===== */
.pagination {
    display: flex;
    gap: 4px;
    align-items: center;
    justify-content: center;
    margin-top: 20px;
}

.page-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--color-border);
    background: var(--color-white);
    color: var(--color-text);
    transition: all .15s;
    cursor: pointer;
}

.page-link:hover { background: var(--color-bg); }
.page-link.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.page-link.disabled { opacity: .4; pointer-events: none; }

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-muted);
}

.empty-state svg { width: 48px; height: 48px; margin: 0 auto 16px; opacity: .4; }
.empty-state p { font-size: 15px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .charts-grid { grid-template-columns: 1fr; }
    .form-grid { grid-template-columns: 1fr; }
    .form-group.span2 { grid-column: span 1; }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .page-body { padding: 16px; }
    .topbar { padding: 0 16px; }
    .hamburger { display: flex; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
}

/* Actions column */
.actions { display: flex; gap: 6px; }

/* Section title */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-header h3 {
    font-size: 16px;
    font-weight: 600;
}