:root {
    --primary: #2F4858;
    --primary-dark: #1e3340;
    --secondary: #556B2F;
    --secondary-hover: #3f521f;
    --accent: #c8963e;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 8px;
    --shadow: 0 4px 15px rgba(0,0,0,0.06);
}

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

body {
    font-family: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-main);
    line-height: 1.5;
    font-size: 16px;
}

/* Layout */
.admin-header {
    background: var(--primary);
    color: #fff;
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
    position: sticky;
    top: 0;
    z-index: 100;
}

.admin-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #fff;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
}

.admin-brand img {
    height: 38px;
    width: 38px;
    object-fit: contain;
}

.admin-nav {
    display: flex;
    align-items: center;
    gap: 15px;
    list-style: none;
}

.admin-nav a {
    color: #e2e8f0;
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.admin-nav a:hover,
.admin-nav a.active {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

.admin-user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-logout {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    text-decoration: none;
    border: 1px solid rgba(239, 68, 68, 0.4);
    transition: all 0.2s;
}

.btn-logout:hover {
    background: #ef4444;
    color: #fff;
}

.admin-container {
    max-width: 1240px;
    margin: 30px auto;
    padding: 0 20px;
}

/* Page Header */
.page-title-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.page-title-bar h1 {
    font-size: 1.8rem;
    color: var(--primary);
    font-family: 'Playfair Display', serif;
}

.action-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-white);
    padding: 20px 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}

.stat-card .stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-card .stat-sub {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Card Box */
.card-box {
    background: var(--bg-white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    overflow: hidden;
}

.card-box-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fafbfc;
}

.card-box-header h2 {
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 700;
}

.card-box-body {
    padding: 24px;
}

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.data-table th {
    background: #f1f5f9;
    color: #475569;
    padding: 12px 16px;
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

.data-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.data-table tr:hover {
    background: #f8fafc;
}

/* Badges & Statuses */
.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
}

.status-nowa {
    background: #e0f2fe;
    color: #0369a1;
}

.status-potwierdzona {
    background: #fef3c7;
    color: #b45309;
}

.status-oplacona {
    background: #dcfce7;
    color: #15803d;
}

.status-anulowana {
    background: #fee2e2;
    color: #b91c1c;
}

.badge-tag {
    background: #f1f5f9;
    color: #475569;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid #cbd5e1;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--secondary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--secondary-hover);
}

.btn-secondary {
    background: #e2e8f0;
    color: #334155;
}

.btn-secondary:hover {
    background: #cbd5e1;
}

.btn-success {
    background: #16a34a;
    color: #fff;
}

.btn-success:hover {
    background: #15803d;
}

.btn-danger {
    background: #ef4444;
    color: #fff;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.85rem;
}

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

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

.form-group label {
    font-weight: 600;
    font-size: 0.9rem;
    color: #334155;
}

.form-control {
    padding: 10px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(85, 107, 47, 0.15);
}

/* Alerts */
.alert {
    padding: 14px 18px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.alert-success {
    background: #dcfce7;
    color: #15803d;
    border: 1px solid #86efac;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

/* Filter bar */
.filter-bar {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    background: #fff;
    padding: 15px 20px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.filter-bar input,
.filter-bar select {
    padding: 8px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    .admin-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }
    .admin-nav {
        flex-wrap: wrap;
        gap: 8px;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
}