/**
 * Email Marketing Application - Main Stylesheet
 * Modern, responsive design optimized for email marketing workflows
 */

/* Custom CSS Variables */
:root {
    --primary-color: #007bff;
    --primary-dark: #0056b3;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-radius: 8px;
    --box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

/* Global Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f6fa;
    color: #2c3e50;
    line-height: 1.6;
}

/* Custom Card Styles */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
    padding: 1rem 1.5rem;
    border-bottom: none;
}

.card-header h5 {
    margin: 0;
    font-weight: 600;
}

/* Navigation Enhancements */
.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.nav-link {
    transition: var(--transition);
    border-radius: 6px;
    margin: 0 2px;
}

.nav-link:hover {
    background-color: rgba(255,255,255,0.1);
    transform: translateY(-1px);
}

.nav-link.active {
    background-color: rgba(255,255,255,0.2);
    font-weight: 600;
}

/* Button Enhancements */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: none;
    padding: 0.5rem 1.5rem;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #1e7e34);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #c82333);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #e0a800);
    color: #212529;
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color), #138496);
}

/* Form Enhancements */
.form-control, .form-select {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    transition: var(--transition);
    padding: 0.75rem 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,0.25);
    transform: translateY(-1px);
}

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

/* Table Enhancements */
.table {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.table thead th {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border: none;
    font-weight: 600;
    color: var(--dark-color);
    padding: 1rem;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background-color: #f8f9fa;
    transform: scale(1.01);
}

.table td {
    padding: 1rem;
    border-color: #f1f3f4;
    vertical-align: middle;
}

/* Dashboard Stats Cards */
.stats-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
}

.stats-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
}

.stats-card .stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stats-card .stats-label {
    font-size: 1rem;
    color: var(--secondary-color);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stats-card .stats-icon {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    color: rgba(0,123,255,0.2);
}

/* Progress Bars */
.progress {
    height: 8px;
    border-radius: 10px;
    background-color: #e9ecef;
    overflow: hidden;
}

.progress-bar {
    border-radius: 10px;
    transition: width 0.6s ease;
}

/* Badges */
.badge {
    border-radius: 20px;
    padding: 0.5rem 1rem;
    font-weight: 500;
    font-size: 0.75rem;
}

/* Status Indicators */
.status-draft { color: var(--secondary-color); }
.status-scheduled { color: var(--info-color); }
.status-sending { color: var(--warning-color); }
.status-sent { color: var(--success-color); }
.status-paused { color: var(--warning-color); }
.status-cancelled { color: var(--danger-color); }

.status-pending { color: var(--warning-color); }
.status-processing { color: var(--info-color); }
.status-delivered { color: var(--success-color); }
.status-bounced { color: var(--danger-color); }
.status-failed { color: var(--danger-color); }

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0,123,255,0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* File Upload Area */
.upload-area {
    border: 2px dashed #dee2e6;
    border-radius: var(--border-radius);
    padding: 3rem;
    text-align: center;
    transition: var(--transition);
    background: white;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: #f8f9ff;
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: #e3f2fd;
    transform: scale(1.02);
}

.upload-area .upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Email Template Editor */
.template-editor {
    border: 1px solid #dee2e6;
    border-radius: var(--border-radius);
    min-height: 400px;
    background: white;
}

.template-toolbar {
    background: #f8f9fa;
    padding: 0.5rem;
    border-bottom: 1px solid #dee2e6;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.template-toolbar .btn {
    margin-right: 0.25rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

/* Campaign Builder */
.campaign-step {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--box-shadow);
    position: relative;
}

.campaign-step::before {
    content: '';
    position: absolute;
    left: -1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 2rem;
    height: 2rem;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.campaign-step:nth-child(1)::before { content: '1'; }
.campaign-step:nth-child(2)::before { content: '2'; }
.campaign-step:nth-child(3)::before { content: '3'; }
.campaign-step:nth-child(4)::before { content: '4'; }

/* Responsive Design */
@media (max-width: 768px) {
    .stats-card {
        margin-bottom: 1rem;
    }
    
    .stats-card .stats-number {
        font-size: 2rem;
    }
    
    .campaign-step {
        margin-left: 1rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .btn {
        padding: 0.375rem 1rem;
        font-size: 0.875rem;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --light-color: #2c3e50;
        --dark-color: #ecf0f1;
    }
    
    body {
        background-color: #1a1a1a;
        color: #ecf0f1;
    }
    
    .card {
        background-color: #2c3e50;
        color: #ecf0f1;
    }
    
    .table {
        background-color: #2c3e50;
        color: #ecf0f1;
    }
    
    .form-control, .form-select {
        background-color: #34495e;
        border-color: #4a5f7a;
        color: #ecf0f1;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-in-left {
    animation: slideInLeft 0.5s ease-out;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

.bounce-in {
    animation: bounceIn 0.6s ease-out;
}

@keyframes bounceIn {
    0% { opacity: 0; transform: scale(0.3); }
    50% { opacity: 1; transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { opacity: 1; transform: scale(1); }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-hover {
    transition: var(--transition);
}

.shadow-hover:hover {
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(white, white) padding-box,
                linear-gradient(135deg, var(--primary-color), var(--info-color)) border-box;
}

/* Print Styles */
@media print {
    .navbar, .btn, .pagination {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}