/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --sidebar-bg: #1e293b;
    --sidebar-hover: #334155;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.login-box h1 {
    font-size: 28px;
    margin-bottom: 10px;
    color: var(--primary-color);
    text-align: center;
}

.login-box h2 {
    font-size: 18px;
    margin-bottom: 30px;
    color: var(--text-light);
    text-align: center;
}

/* Layout */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 250px;
    height: 100vh;
    background-color: var(--sidebar-bg);
    color: white;
    overflow-y: auto;
    z-index: 1000;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    font-size: 20px;
    color: white;
}

.sidebar-nav {
    padding: 10px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s;
}

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

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

.nav-icon {
    margin-right: 12px;
    font-size: 18px;
}

.sidebar-footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.main-content {
    margin-left: 250px;
    min-height: 100vh;
}

.header {
    background: var(--card-bg);
    padding: 20px 30px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-content h2 {
    font-size: 24px;
    color: var(--text-color);
}

.content {
    padding: 30px;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.card h2 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--text-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

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

.page-header h1 {
    font-size: 28px;
    color: var(--text-color);
}

/* Statistics */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-icon {
    font-size: 40px;
}

.stat-info h3 {
    font-size: 28px;
    color: var(--text-color);
    margin-bottom: 5px;
}

.stat-info p {
    color: var(--text-light);
    font-size: 14px;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

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

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

.btn-secondary:hover {
    background-color: #475569;
}

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

.btn-success:hover {
    background-color: #059669;
}

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

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

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

.btn-warning:hover {
    background-color: #d97706;
}

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

.btn-info:hover {
    background-color: #2563eb;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-block {
    width: 100%;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

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

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

.data-table thead {
    background-color: var(--bg-color);
}

.data-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background-color: var(--bg-color);
}

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

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-info {
    background-color: #dbeafe;
    color: #1e40af;
}

.badge-running {
    background-color: #dbeafe;
    color: #1e40af;
}

.badge-draft {
    background-color: #f3f4f6;
    color: #374151;
}

.badge-completed {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-stopped {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-paused {
    background-color: #fef3c7;
    color: #92400e;
}

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 5px;
}

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

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: -2px;
    transition: all 0.3s;
}

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

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    overflow: auto;
}

.modal-content {
    background-color: var(--card-bg);
    margin: 10% auto;
    padding: 30px;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-light);
    cursor: pointer;
}

.close:hover {
    color: var(--text-color);
}

/* Campaign Info */
.campaign-info {
    margin-bottom: 20px;
}

.campaign-info p {
    margin-bottom: 10px;
}

.campaign-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.email-preview {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 20px;
    background-color: var(--bg-color);
    max-height: 500px;
    overflow-y: auto;
}

/* Real-time indicator */
.realtime-indicator {
    font-size: 12px;
    margin-left: 10px;
    animation: pulse 2s infinite;
}

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

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
}

@media (max-width: 640px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
}