/* ===== Phase-2 Modern Theme ===== */
:root {
    --bg: #f0f2f5;
    --sidebar-bg: #1e293b;
    --sidebar-text: #94a3b8;
    --sidebar-active: #ffffff;
    --sidebar-hover: #334155;
    --sidebar-accent: #3b82f6;
    --card: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-soft: #eff6ff;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --danger: #ef4444;
    --danger-soft: #fef2f2;
    --success: #22c55e;
    --success-soft: #f0fdf4;
    --warning: #f59e0b;
    --warning-soft: #fffbeb;
    --info: #06b6d4;
    --info-soft: #ecfeff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: .2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    font-size: 14px;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-hover); }

/* ===== Layout ===== */
.layout { display: flex; min-height: 100vh; }
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: fixed;
    top: 0; left: 0; bottom: 0;
    display: flex; flex-direction: column;
    z-index: 100;
    transition: transform var(--transition);
    overflow-y: auto;
}
.sidebar-brand {
    padding: 24px 20px;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    border-bottom: 1px solid #334155;
    display: flex; align-items: center; gap: 10px;
    letter-spacing: -.3px;
}
.sidebar-brand span { font-size: 22px; }
.sidebar-nav { padding: 12px 0; flex: 1; }
.sidebar-section { padding: 6px 20px; font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: #475569; margin-top: 12px; }
.sidebar-link {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 20px;
    color: var(--sidebar-text);
    font-size: 14px;
    transition: all var(--transition);
    border-left: 3px solid transparent;
}
.sidebar-link:hover { background: var(--sidebar-hover); color: var(--sidebar-active); }
.sidebar-link.active { background: var(--sidebar-hover); color: var(--sidebar-active); border-left-color: var(--sidebar-accent); }
.sidebar-link .icon { width: 20px; text-align: center; font-size: 16px; flex-shrink: 0; }
.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid #334155;
    font-size: 13px;
}
.content { flex: 1; margin-left: 260px; }
.content-header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 16px 32px;
    display: flex; align-items: center; justify-content: space-between;
    position: sticky; top: 0; z-index: 50;
    box-shadow: var(--shadow-sm);
}
.content-header h1 { font-size: 20px; font-weight: 600; }
.content-body { padding: 24px 32px; }

/* ===== Cards ===== */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}
.card:hover { box-shadow: var(--shadow); }
.card-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-light);
}
.card-title { font-size: 16px; font-weight: 600; }

/* ===== Stat Cards ===== */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}
.stat-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; height: 4px;
}
.stat-card.blue::before { background: var(--primary); }
.stat-card.green::before { background: var(--success); }
.stat-card.red::before { background: var(--danger); }
.stat-card.orange::before { background: var(--warning); }
.stat-card.cyan::before { background: var(--info); }
.stat-label { font-size: 13px; color: var(--text-secondary); font-weight: 500; margin-bottom: 6px; }
.stat-value { font-size: 28px; font-weight: 700; line-height: 1.2; }
.stat-icon { position: absolute; right: 20px; top: 50%; transform: translateY(-50%); font-size: 40px; opacity: .08; }

/* ===== Grid ===== */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(400px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; border-radius: var(--radius-sm); }
table { width: 100%; border-collapse: collapse; }
thead th {
    background: #f8fafc;
    border-bottom: 2px solid var(--border);
    padding: 12px 14px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--text-secondary);
}
tbody td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-light);
    font-size: 14px;
    vertical-align: middle;
}
tbody tr:hover { background: #f8fafc; }
tbody tr:last-child td { border-bottom: none; }

/* ===== Badges ===== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.4;
}
.badge-success { background: var(--success-soft); color: #15803d; }
.badge-danger { background: var(--danger-soft); color: #dc2626; }
.badge-warning { background: var(--warning-soft); color: #b45309; }
.badge-info { background: var(--info-soft); color: #0891b2; }
.badge-primary { background: var(--primary-soft); color: var(--primary); }

/* ===== Forms ===== */
.form-group { margin-bottom: 16px; }
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.form-control {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: 14px;
    background: #fff;
    transition: border-color var(--transition), box-shadow var(--transition);
    color: var(--text);
    outline: none;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59,130,246,.12); }
textarea.form-control { min-height: 100px; resize: vertical; }
select.form-control { cursor: pointer; }
.form-row { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.form-check { display: flex; align-items: center; gap: 8px; }
.form-check input[type="checkbox"] { width: auto; accent-color: var(--primary); }

/* ===== Buttons ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); color: #fff; box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 13px; border-radius: 6px; }
.btn-icon { width: 36px; height: 36px; padding: 0; border-radius: 8px; }
.btn-group { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ===== Search / Filter Bar ===== */
.filter-bar {
    display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}
.filter-bar .form-control { width: auto; min-width: 200px; padding: 8px 12px; }
.filter-bar select.form-control { min-width: 140px; }

/* ===== Info Box / Detail ===== */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}
.info-item {}
.info-label { font-size: 12px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .5px; font-weight: 500; }
.info-value { font-size: 15px; font-weight: 500; margin-top: 2px; }

/* ===== Flash Messages ===== */
.flash {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 500;
    display: flex; align-items: center; gap: 8px;
}
.flash-success { background: var(--success-soft); color: #15803d; border: 1px solid #bbf7d0; }
.flash-error { background: var(--danger-soft); color: #dc2626; border: 1px solid #fecaca; }

/* ===== Login ===== */
.login-wrap {
    width: min(440px, 92%);
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.login-card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 40px 36px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}
.login-brand {
    text-align: center;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}
.login-sub {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 28px;
}

/* ===== Utility ===== */
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.text-muted { color: var(--text-secondary); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.font-mono { font-family: 'JetBrains Mono', monospace; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 12px; }
.gap-3 { gap: 16px; }
.w-full { width: 100%; }

/* ===== Avatar ===== */
.avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: var(--primary-soft);
    color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-weight: 600; font-size: 16px;
    flex-shrink: 0;
}
.avatar-sm { width: 32px; height: 32px; font-size: 13px; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .content { margin-left: 0; }
    .content-header { padding: 12px 16px; }
    .content-body { padding: 16px; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
    .grid-2 { grid-template-columns: 1fr; }
    .filter-bar { flex-direction: column; }
    .filter-bar .form-control { width: 100%; min-width: unset; }
}
.mobile-toggle {
    display: none;
    background: none; border: none;
    font-size: 24px; cursor: pointer; color: var(--text);
    width: auto; padding: 4px;
}
@media (max-width: 768px) { .mobile-toggle { display: block; } }

/* ===== Print ===== */
@media print {
    .no-print, .sidebar, .content-header { display: none !important; }
    .content { margin-left: 0 !important; }
    .content-body { padding: 0 !important; }
    body { background: #fff; font-size: 12px; }
    .card { box-shadow: none; border: 1px solid #ddd; }
}