/**
 * Custom CSS for Email Spam Analyzer
 * 
 * This file contains custom styles for a modern, attractive interface
 * with careful attention to color contrast and readability.
 */

/* Import Inter font family */
* {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* CSS Custom Properties for consistent theming */
:root {
    --primary-color: #4f46e5;
    --primary-dark: #3730a3;
    --primary-light: #6366f1;
    --secondary-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --light-gray: #f8fafc;
    --medium-gray: #64748b;
    --dark-gray: #1e293b;
    --border-radius: 12px;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.2s ease-in-out;
}

/* Body and layout */
body {
    background-color: var(--light-gray);
    color: var(--dark-gray);
    line-height: 1.6;
}

.min-vh-100 {
    min-height: 100vh;
}

/* Primary gradient background */
.bg-primary-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    position: relative;
    overflow: hidden;
}

.bg-primary-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><circle cx="30" cy="30" r="2"/></g></svg>') repeat;
    pointer-events: none;
}

/* Form container */
.form-container {
    max-width: 500px;
    width: 100%;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

/* Results container */
.results-container {
    max-width: 600px;
    width: 100%;
    padding: 2rem;
}

/* Custom form controls */
.form-control {
    border-radius: var(--border-radius);
    border: 2px solid rgba(255, 255, 255, 0.2);
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    border-color: rgba(255, 255, 255, 0.5);
    background-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.25);
    color: white;
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

/* Custom button styles */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-light:hover {
    background-color: var(--light-gray);
    border-color: var(--light-gray);
    color: var(--primary-dark);
    transform: translateY(-1px);
}

/* Loading spinner customization */
.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Results styling */
.spam-score-container {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    margin-bottom: 1.5rem;
    text-align: center;
}

.spam-score {
    font-size: 3rem;
    font-weight: 700;
    margin: 0;
}

.score-excellent { color: var(--success-color); }
.score-good { color: #22c55e; }
.score-fair { color: var(--warning-color); }
.score-poor { color: #f97316; }
.score-very-poor { color: var(--danger-color); }

.deliverability-badge {
    font-size: 1.1rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    display: inline-block;
    margin-top: 0.5rem;
}

.badge-excellent { background-color: #dcfce7; color: #166534; }
.badge-good { background-color: #dcfce7; color: #15803d; }
.badge-fair { background-color: #fef3c7; color: #92400e; }
.badge-poor { background-color: #fed7aa; color: #c2410c; }
.badge-very-poor { background-color: #fecaca; color: #dc2626; }

/* Analysis sections */
.analysis-section {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    margin-bottom: 1.5rem;
}

.analysis-section h4 {
    color: var(--dark-gray);
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Trigger and recommendation items */
.trigger-item, .recommendation-item {
    background-color: var(--light-gray);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.75rem;
    border-left: 4px solid;
}

.trigger-item.severity-low { border-left-color: var(--success-color); }
.trigger-item.severity-medium { border-left-color: var(--warning-color); }
.trigger-item.severity-high { border-left-color: var(--danger-color); }

.recommendation-item.priority-low { border-left-color: var(--medium-gray); }
.recommendation-item.priority-medium { border-left-color: var(--warning-color); }
.recommendation-item.priority-high { border-left-color: var(--danger-color); }

.trigger-title, .recommendation-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.severity-badge, .priority-badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.severity-low, .priority-low { 
    background-color: #dcfce7; 
    color: #166534; 
}

.severity-medium, .priority-medium { 
    background-color: #fef3c7; 
    color: #92400e; 
}

.severity-high, .priority-high { 
    background-color: #fecaca; 
    color: #dc2626; 
}

.trigger-description, .recommendation-explanation {
    color: var(--medium-gray);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    line-height: 1.5;
}

/* Positive aspects */
.positive-item {
    background-color: #dcfce7;
    border-radius: 8px;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border-left: 4px solid var(--success-color);
    color: #166534;
}

/* Overall assessment */
.overall-assessment {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    border: 1px solid #e2e8f0;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--dark-gray);
}

/* Progress bar for spam score */
.spam-score-progress {
    width: 100%;
    height: 8px;
    background-color: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 1rem;
}

.spam-score-fill {
    height: 100%;
    transition: width 0.5s ease;
    border-radius: 4px;
}

/* Responsive design */
@media (max-width: 991px) {
    .form-container, .results-container {
        padding: 1.5rem;
    }
    
    .spam-score {
        font-size: 2.5rem;
    }
    
    .bg-primary-gradient {
        min-height: auto;
        padding: 2rem 0;
    }
}

@media (max-width: 576px) {
    .form-container, .results-container {
        padding: 1rem;
    }
    
    .spam-score {
        font-size: 2rem;
    }
    
    .analysis-section {
        padding: 1rem;
    }
}

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

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

/* Focus states for accessibility */
.btn:focus,
.form-control:focus {
    outline: 2px solid rgba(79, 70, 229, 0.5);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .form-control {
        border-width: 3px;
    }
    
    .trigger-item, .recommendation-item {
        border-left-width: 6px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}