/* ========================================================================== */
/* MODERN DARK THEME - CLEAN & PROFESSIONAL */
/* ========================================================================== */

:root {
    /* Colors - Clean Dark Palette */
    --bg-primary: #0f1419;
    --bg-secondary: #1a1f29;
    --bg-tertiary: #242b38;
    --bg-card: #1e2530;
    --bg-hover: #2a3441;
    
    /* Accent Colors */
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-yellow: #f59e0b;
    --accent-purple: #8b5cf6;
    
    /* Text Colors */
    --text-primary: #e4e7eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    /* Border & Dividers */
    --border: #2d3748;
    --border-hover: #4a5568;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    
    /* Spacing & Sizing */
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.2s ease;
}

/* ========================================================================== */
/* BASE STYLES */
/* ========================================================================== */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

::selection {
    background: var(--accent-blue);
    color: white;
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* ========================================================================== */
/* LOGIN PAGE */
/* ========================================================================== */

.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f1419 0%, #1a1f29 100%);
}

.login-wrapper {
    width: 100%;
    max-width: 420px;
    padding: 2rem;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    background: var(--accent-blue);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-logo i {
    font-size: 1.75rem;
    color: white;
}

.login-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 1.25rem;
    position: relative;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: var(--bg-secondary);
}

.input-icon {
    position: absolute;
    left: 0.875rem;
    top: 2.5rem;
    color: var(--text-muted);
    pointer-events: none;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.custom-checkbox input {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.checkbox-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
}

.login-btn {
    width: 100%;
    padding: 0.875rem;
    background: var(--accent-blue);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.login-btn:hover {
    background: var(--accent-blue-hover);
}

.login-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.alert {
    padding: 0.875rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--accent-red);
    color: #fca5a5;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--accent-green);
    color: #6ee7b7;
}

.login-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========================================================================== */
/* ADMIN PANEL LAYOUT */
/* ========================================================================== */

.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    background: var(--accent-blue);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-logo i {
    font-size: 1.25rem;
    color: white;
}

.sidebar-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.nav-menu {
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
    transition: var(--transition);
    font-size: 0.95rem;
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--bg-hover);
    color: var(--accent-blue);
}

.nav-item i {
    width: 20px;
    text-align: center;
}

.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* ========================================================================== */
/* HEADER */
/* ========================================================================== */

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.header-left h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.header-left p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.btn {
    padding: 0.625rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: white;
}

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

.btn-success {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: white;
}

.btn-danger {
    background: var(--accent-red);
    border-color: var(--accent-red);
    color: white;
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.85rem;
}

/* ========================================================================== */
/* STATS CARDS */
/* ========================================================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--border-hover);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.stat-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-blue);
}

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

.stat-change {
    font-size: 0.85rem;
    color: var(--accent-green);
    margin-top: 0.5rem;
}

/* ========================================================================== */
/* CARDS & TABLES */
/* ========================================================================== */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

thead {
    background: var(--bg-tertiary);
}

th {
    padding: 0.875rem;
    text-align: left;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    padding: 0.875rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

tr:hover td {
    background: var(--bg-hover);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-yellow);
}

/* ========================================================================== */
/* FILTERS & SEARCH */
/* ========================================================================== */

.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.filter-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.filter-input,
.filter-select {
    width: 100%;
    padding: 0.625rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.filter-input:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: var(--bg-secondary);
}

/* ========================================================================== */
/* MODAL */
/* ========================================================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ========================================================================== */
/* RESPONSIVE */
/* ========================================================================== */

@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .filters {
        flex-direction: column;
    }
    
    .table-container {
        overflow-x: scroll;
    }
}

/* ========================================================================== */
/* UTILITIES */
/* ========================================================================== */

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.d-flex {
    display: flex;
}

.align-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }