:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #1e293b;
    --dark-light: #334155;
    --gray: #64748b;
    --light: #f1f5f9;
    --white: #ffffff;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--light);
    color: var(--dark);
    line-height: 1.6;
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: 260px;
    background: var(--dark);
    color: var(--white);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    box-shadow: 2px 0 10px var(--shadow);
}

.logo {
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid var(--dark-light);
}

.logo i {
    font-size: 2rem;
    color: var(--primary);
}

.logo h2 {
    font-size: 1.4rem;
    font-weight: 700;
}

nav {
    flex: 1;
    padding: 1rem 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    color: var(--gray);
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--dark-light);
    color: var(--white);
}

.nav-item.active {
    background: var(--dark-light);
    color: var(--white);
    border-left-color: var(--primary);
}

.nav-item i {
    font-size: 1.2rem;
    width: 24px;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--dark-light);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Main Content */
.main-content {
    margin-left: 260px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: var(--white);
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-icon {
    position: relative;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--light);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    color: var(--dark);
}

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

.btn-icon i {
    font-size: 1.2rem;
}

.badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger);
    color: var(--white);
    border-radius: 10px;
    padding: 2px 6px;
    font-size: 0.7rem;
    font-weight: 700;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--light);
    border-radius: 8px;
    cursor: pointer;
}

.user-menu i {
    font-size: 1.5rem;
    color: var(--primary);
}

/* Main Content Area */
main {
    padding: 2rem;
    flex: 1;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-4px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.stat-icon.blue { background: var(--primary); }
.stat-icon.green { background: var(--success); }
.stat-icon.orange { background: var(--warning); }
.stat-icon.red { background: var(--danger); }

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
}

.stat-info p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* Content Card */
.content-card {
    background: var(--white);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 8px var(--shadow);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.card-header h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--dark);
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

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

.btn-secondary {
    background: var(--light);
    color: var(--dark);
}

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

/* Table */
.table-container {
    overflow-x: auto;
}

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

thead {
    background: var(--light);
}

th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--dark);
    border-bottom: 2px solid var(--border);
}

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

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
}

.status-badge.success { background: #d1fae5; color: var(--success); }
.status-badge.warning { background: #fef3c7; color: var(--warning); }
.status-badge.danger { background: #fee2e2; color: var(--danger); }
.status-badge.info { background: #dbeafe; color: var(--primary); }

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--gray);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.1rem;
}

/* Campaigns Grid */
.campaigns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.campaign-card {
    background: var(--light);
    padding: 1.5rem;
    border-radius: 12px;
    border-left: 4px solid var(--primary);
    transition: transform 0.3s;
}

.campaign-card:hover {
    transform: translateY(-2px);
}

.campaign-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.campaign-meta {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
    font-size: 0.9rem;
    color: var(--gray);
}

.campaign-progress {
    margin-top: 1rem;
}

.progress-bar {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    transition: width 0.3s;
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--white);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

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

.modal-header h2 {
    font-size: 1.5rem;
    color: var(--dark);
}

.modal-close {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--light);
    border-radius: 8px;
    cursor: pointer;
    color: var(--dark);
    transition: all 0.3s;
}

.modal-close:hover {
    background: var(--danger);
    color: var(--white);
}

.modal-body {
    padding: 1.5rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: var(--gray);
    font-size: 0.85rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

/* Action buttons in table */
.action-btn {
    padding: 0.5rem;
    border: none;
    background: transparent;
    color: var(--gray);
    cursor: pointer;
    transition: color 0.3s;
}

.action-btn:hover {
    color: var(--primary);
}

.action-btn.danger:hover {
    color: var(--danger);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}