@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    --dark: #0f172a;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --sidebar-width: 260px;
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    color: var(--gray-800);
    background: var(--gray-100);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; }

.container { max-width: 1400px; margin: 0 auto; padding: 0 24px; }

/* LAYOUT */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* SIDEBAR */
.sidebar {
    width: var(--sidebar-width);
    background: var(--dark);
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s;
}

.sidebar-brand {
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
}

.sidebar-brand-icon {
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.sidebar-section {
    padding: 8px 12px;
}

.sidebar-section-title {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255,255,255,0.4);
    padding: 16px 12px 8px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 0.875rem;
    color: rgba(255,255,255,0.7);
    transition: all 0.15s;
    margin-bottom: 2px;
}

.sidebar-link:hover { background: rgba(255,255,255,0.08); color: #fff; }
.sidebar-link.active { background: var(--primary); color: #fff; }
.sidebar-link i { width: 20px; text-align: center; font-size: 1rem; }

.sidebar-link .badge {
    margin-left: auto;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 600;
}

.badge-danger { background: var(--danger); color: #fff; }
.badge-success { background: var(--success); color: #fff; }
.badge-warning { background: var(--warning); color: #fff; }
.badge-info { background: var(--info); color: #fff; }
.badge-secondary { background: var(--gray-500); color: #fff; }

/* MAIN CONTENT */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
}

/* TOPBAR */
.topbar {
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-left { display: flex; align-items: center; gap: 16px; }

.topbar-title { font-size: 1.1rem; font-weight: 600; color: var(--gray-800); }

.topbar-right { display: flex; align-items: center; gap: 12px; }

.topbar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
    position: relative;
}

.topbar-user:hover { background: var(--gray-100); }

.topbar-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.topbar-user-info strong { display: block; font-size: 0.8rem; font-weight: 600; }
.topbar-user-info span { font-size: 0.7rem; color: var(--gray-500); }

/* PAGE CONTENT */
.page-content { padding: 24px; }

/* STATS CARDS */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.stat-icon.blue { background: var(--primary-light); color: var(--primary); }
.stat-icon.green { background: #d1fae5; color: var(--success); }
.stat-icon.orange { background: #ffedd5; color: var(--warning); }
.stat-icon.red { background: #fee2e2; color: var(--danger); }
.stat-icon.purple { background: #ede9fe; color: #7c3aed; }
.stat-icon.cyan { background: #cffafe; color: var(--info); }

.stat-info strong { display: block; font-size: 1.5rem; font-weight: 800; color: var(--gray-900); }
.stat-info span { font-size: 0.8rem; color: var(--gray-500); }

/* CARD */
.card {
    background: #fff;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    overflow: hidden;
    margin-bottom: 24px;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
}

.card-header h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gray-900);
}

.card-body { padding: 20px; }

/* TABLE */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.data-table th {
    background: var(--gray-50);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--gray-600);
    border-bottom: 2px solid var(--gray-100);
    white-space: nowrap;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.data-table td { padding: 12px 16px; border-bottom: 1px solid var(--gray-100); vertical-align: middle; }
.data-table tr:hover { background: var(--gray-50); }
.data-table img { width: 60px; height: 40px; object-fit: cover; border-radius: 4px; }

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

.btn-xs {
    padding: 4px 10px;
    font-size: 0.75rem;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.15s;
    font-family: inherit;
}

.btn-xs-primary { background: var(--primary-light); color: var(--primary); }
.btn-xs-primary:hover { background: var(--primary); color: #fff; }
.btn-xs-success { background: #d1fae5; color: var(--success); }
.btn-xs-success:hover { background: var(--success); color: #fff; }
.btn-xs-danger { background: #fee2e2; color: var(--danger); }
.btn-xs-danger:hover { background: var(--danger); color: #fff; }
.btn-xs-warning { background: #ffedd5; color: var(--warning); }
.btn-xs-warning:hover { background: var(--warning); color: #fff; }
.btn-xs-secondary { background: var(--gray-100); color: var(--gray-600); }
.btn-xs-secondary:hover { background: var(--gray-300); color: var(--gray-800); }

/* BADGES */
.status-badge {
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    display: inline-block;
}

.badge-pending { background: #fef3c7; color: #92400e; }
.badge-approved { background: #d1fae5; color: #065f46; }
.badge-rejected { background: #fee2e2; color: #991b1b; }
.badge-sold { background: var(--gray-200); color: var(--gray-600); }
.badge-hidden { background: var(--gray-800); color: #fff; }
.badge-new { background: var(--info); color: #fff; }
.badge-read { background: var(--gray-200); color: var(--gray-600); }
.badge-replied { background: var(--success); color: #fff; }
.badge-active { background: var(--success); color: #fff; }
.badge-inactive { background: var(--gray-300); color: var(--gray-600); }
.badge-admin { background: #7c3aed; color: #fff; }
.badge-staff { background: var(--primary); color: #fff; }
.badge-user { background: var(--gray-500); color: #fff; }

/* ALERTS */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
}

.alert-success { background: #ecfdf5; color: #065f46; border-left: 4px solid var(--success); }
.alert-danger { background: #fef2f2; color: #991b1b; border-left: 4px solid var(--danger); }
.alert-warning { background: #fffbeb; color: #92400e; border-left: 4px solid var(--warning); }
.alert-info { background: #f0f9ff; color: #075985; border-left: 4px solid var(--info); }

/* FORMS */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--gray-700);
}

.form-control {
    padding: 10px 14px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 0.875rem;
    width: 100%;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: #fff;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

select.form-control { cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 100px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

.form-hint { font-size: 0.75rem; color: var(--gray-500); margin-top: 4px; }
.form-error { font-size: 0.75rem; color: var(--danger); margin-top: 4px; }

/* BUTTONS */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: inherit;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #d97706; color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }

/* CHECKBOX/TOGGLE */
.form-check { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.form-check input[type="checkbox"] { width: 18px; height: 18px; cursor: pointer; accent-color: var(--primary); }

/* TABS */
.tabs { display: flex; border-bottom: 2px solid var(--gray-100); margin-bottom: 24px; }
.tab {
    padding: 12px 24px;
    font-weight: 500;
    color: var(--gray-500);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    font-size: 0.875rem;
    transition: all 0.2s;
}
.tab:hover { color: var(--primary); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* PAGINATION */
.pagination { display: flex; justify-content: center; gap: 4px; margin-top: 24px; }
.pagination a, .pagination span {
    min-width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.15s;
    padding: 0 8px;
}
.pagination a { background: #fff; border: 1px solid var(--gray-200); color: var(--gray-600); }
.pagination a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .active { background: var(--primary); color: #fff; border: 1px solid var(--primary); }
.pagination .disabled { opacity: 0.4; cursor: not-allowed; }

/* FILTER BAR */
.filter-bar {
    display: flex;
    gap: 12px;
    align-items: end;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-bar .form-group { margin-bottom: 0; min-width: 160px; }

/* MODAL */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 24px;
}

.modal {
    background: #fff;
    border-radius: 12px;
    width: 100%;
    max-width: 500px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.25);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 { font-size: 1rem; font-weight: 700; }
.modal-close { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--gray-400); }
.modal-close:hover { color: var(--gray-800); }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--gray-100); display: flex; justify-content: flex-end; gap: 8px; }

/* USER AVATAR IN TABLE */
.user-cell { display: flex; align-items: center; gap: 10px; }
.user-cell-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.7rem;
    flex-shrink: 0;
}

/* THUMBNAIL GRID (image management) */
.thumb-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 12px;
}

.thumb-item {
    position: relative;
    width: 100px;
    height: 75px;
    border-radius: 6px;
    overflow: hidden;
    border: 2px solid var(--gray-200);
}

.thumb-item img { width: 100%; height: 100%; object-fit: cover; }
.thumb-item .thumb-del {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--danger);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.15s;
}

.thumb-item:hover .thumb-del { opacity: 1; }
.thumb-item.is-thumb { border-color: var(--success); }

/* SETTINGS */
.settings-group { margin-bottom: 32px; }
.settings-group h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-800);
}

/* DROPDOWN */
.dropdown { position: relative; }

.dropdown-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 4px);
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    box-shadow: 0 10px 15px rgba(0,0,0,0.1);
    min-width: 160px;
    z-index: 50;
    display: none;
    overflow: hidden;
}

.dropdown.show .dropdown-menu { display: block; }

.dropdown-item {
    display: block;
    padding: 8px 16px;
    font-size: 0.8rem;
    color: var(--gray-700);
    transition: background 0.1s;
}

.dropdown-item:hover { background: var(--gray-50); color: var(--primary); }
.dropdown-item.danger:hover { background: #fef2f2; color: var(--danger); }
.dropdown-divider { border-top: 1px solid var(--gray-100); }

/* PAGE HEADER */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.page-header h1 { font-size: 1.25rem; font-weight: 700; color: var(--gray-900); }
.page-header p { font-size: 0.8rem; color: var(--gray-500); margin-top: 2px; }

/* FILE INPUT */
.file-input-wrapper { position: relative; }
.file-input-wrapper input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

.file-input-label {
    border: 2px dashed var(--gray-300);
    border-radius: 8px;
    padding: 32px;
    text-align: center;
    color: var(--gray-500);
    transition: all 0.2s;
    cursor: pointer;
}

.file-input-label:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.file-input-label i { font-size: 2rem; margin-bottom: 8px; display: block; }

/* LOGS */
.log-item {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-100);
    font-size: 0.8rem;
    display: flex;
    gap: 12px;
    align-items: start;
}

.log-item:last-child { border-bottom: none; }
.log-time { color: var(--gray-400); min-width: 140px; flex-shrink: 0; }
.log-user { font-weight: 600; color: var(--primary); min-width: 100px; }
.log-text { color: var(--gray-700); }

/* CHART AREA */
.chart-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; margin-bottom: 24px; }

/* UTILITIES */
.text-muted { color: var(--gray-500); font-size: 0.8rem; }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.fw-600 { font-weight: 600; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 16px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }

/* RESPONSIVE */
.mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; }

@media (max-width: 1024px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .mobile-toggle { display: block; }
    .chart-grid { grid-template-columns: 1fr; }
    .form-row, .form-row-3 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}