/*
=================================================
Global Improvements & Enhanced Styling
دانشگاه آزاد اسلامی واحد کرج
=================================================
*/

/* Enhanced Typography */
body {
    font-family: var(--font-display);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-weight: 400;
    letter-spacing: 0.015em;
    line-height: 1.8;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    letter-spacing: 0.02em;
    line-height: 1.3;
}

/* Modern Color Palette */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    --warning-gradient: linear-gradient(135deg, #FF9800 0%, #f57c00 100%);
    --danger-gradient: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
    --info-gradient: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
}

/* Enhanced Buttons */
.btn-primary {
    background: var(--primary-gradient);
    color: white;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.05rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: white;
    color: #764ba2;
    border: 2px solid #764ba2;
}

.btn-secondary:hover {
    background: #764ba2;
    color: white;
}

/* Enhanced Cards */
.modern-card {
    background: white;
    border-radius: 25px;
    padding: 30px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid #f0f0f0;
}

.modern-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}

/* Improved Page Headers */
.enhanced-header {
    background: var(--primary-gradient);
    padding: 80px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 5px 25px rgba(102, 126, 234, 0.3);
}

.enhanced-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.enhanced-header h1 {
    position: relative;
    z-index: 1;
    color: white;
    font-size: 3rem;
    font-weight: 900;
    text-shadow: 0 3px 10px rgba(0,0,0,0.2);
    letter-spacing: 1px;
}

.enhanced-header p {
    position: relative;
    z-index: 1;
    color: white;
    font-size: 1.3rem;
    font-weight: 500;
    opacity: 0.95;
    margin-top: 15px;
}

/* Smooth Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.8s ease-out backwards;
}

.animate-in-delay-1 { animation-delay: 0.1s; }
.animate-in-delay-2 { animation-delay: 0.2s; }
.animate-in-delay-3 { animation-delay: 0.3s; }
.animate-in-delay-4 { animation-delay: 0.4s; }
.animate-in-delay-5 { animation-delay: 0.5s; }

/* Enhanced Grid Layouts */
.modern-grid {
    display: grid;
    gap: 30px;
}

.modern-grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.modern-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.modern-grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Beautiful Badges */
.badge {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
}

.badge-success {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
    border: 2px solid #28a745;
}

.badge-warning {
    background: linear-gradient(135deg, #fff3cd 0%, #ffe69c 100%);
    color: #856404;
    border: 2px solid #ffc107;
}

.badge-info {
    background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
    color: #0c5460;
    border: 2px solid #17a2b8;
}

.badge-primary {
    background: var(--primary-gradient);
    color: white;
    border: 2px solid #764ba2;
}

/* Loading Skeleton */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: 4px;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Scroll to Top Button */
.scroll-top {
    position: fixed;
    bottom: 30px;
    left: 30px;
    background: linear-gradient(135deg, #50a5ff 0%, #2963bd 100%);
    color: white;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.5);
}

/* Enhanced Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0;
    width: 100%;
}
.container-padding { 
    padding: 3rem;
}

/* Mobile Container Fix */
@media (max-width: 768px) {
   
    .scroll-top {
        width: 56px;
        height: 56px;
        bottom: 16px;
        left: 16px;
        right: auto;
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
   
    .scroll-top {
        width: 56px;
        height: 56px;
        bottom: 16px;
        left: 16px;
        right: auto;
        font-size: 1.3rem;
    }
}

/* Improved Shadows */
.shadow-sm {
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.shadow-md {
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.shadow-lg {
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
}

.shadow-xl {
    box-shadow: 0 15px 50px rgba(0,0,0,0.15);
}

/* Responsive Utilities */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .enhanced-header {
        padding: 50px 15px;
    }
    
    .enhanced-header h1 {
        font-size: 2rem;
    }
    
    .enhanced-header p {
        font-size: 1.1rem;
    }
    
    .modern-grid-2,
    .modern-grid-3,
    .modern-grid-4 {
        grid-template-columns: 1fr;
    }
    
    .modern-card {
        padding: 20px;
    }
    
    .btn-primary {
        padding: 12px 28px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 13px;
    }
    
    .enhanced-header {
        padding: 35px 12px;
    }
    
    .enhanced-header h1 {
        font-size: 1.6rem;
    }
    
    .enhanced-header p {
        font-size: 1rem;
    }
    
    .modern-card {
        padding: 15px;
    }
    
    .btn-primary {
        padding: 10px 24px;
        font-size: 0.95rem;
    }
    
    .badge {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
}