/* Modern Enhancements for Rezaul Karim Portfolio */
:root {
    --primary-color: #F85C70;
    --secondary-color: #6c757d;
    --accent-color: #79A9F5;
    --text-dark: #212529;
    --text-light: #6c757d;
    --bg-light: #f8f9fa;
    --shadow-light: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 20px rgba(0,0,0,0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Monaco', 'Consolas', monospace;
}

/* Enhanced Typography */
body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-dark);
    scroll-behavior: smooth;
}

/* Modern Buttons */
.btn {
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 500;
    text-transform: none;
    box-shadow: var(--shadow-light);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border: none;
}

/* Enhanced Cards */
.card {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.card-header {
    background: linear-gradient(135deg, #fff, var(--bg-light));
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

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

.progress-bar {
    border-radius: 10px;
    transition: width 0.8s ease;
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-image: linear-gradient(
        -45deg,
        rgba(255, 255, 255, 0.2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, 0.2) 50%,
        rgba(255, 255, 255, 0.2) 75%,
        transparent 75%,
        transparent
    );
    background-size: 1rem 1rem;
    animation: progress-animation 1s linear infinite;
}

@keyframes progress-animation {
    0% { background-position: 1rem 0; }
    100% { background-position: 0 0; }
}

/* Enhanced Header */
.header {
    background-image: linear-gradient(to top, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url(../imgs/header.png);
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="white" opacity="0.1"><polygon points="0,0 1000,0 1000,80 0,100"/></svg>') no-repeat center bottom;
    background-size: cover;
}

.header-content {
    position: relative;
    z-index: 2;
}

.header-title {
    font-weight: 700;
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.header-mono {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Enhanced Navigation */
.navbar {
    backdrop-filter: blur(10px);
    background-color: rgba(255,255,255,0.95) !important;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    transition: var(--transition);
}

.navbar-brand img {
    border-radius: 50%;
    transition: var(--transition);
}

.navbar-brand img:hover {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Enhanced Social Icons */
.social-icons {
    display: flex;
    gap: 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.social-link:hover {
    transform: translateY(-3px) scale(1.1);
    background: rgba(255,255,255,0.2);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.social-link i {
    font-size: 1.2rem;
}

/* Enhanced Portfolio */
.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.portfolio-item:hover {
    transform: scale(1.05);
}

.portfolio-item img {
    transition: var(--transition);
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.content-holder {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(248,92,112,0.9), rgba(121,169,245,0.9));
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.portfolio-item:hover .content-holder {
    opacity: 1;
}

/* Enhanced Filters */
.filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filters a {
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    background: #fff;
    color: var(--text-dark);
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    font-weight: 500;
}

.filters a:hover,
.filters a.active {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* Enhanced Contact Form */
.contact-form-card {
    padding: 2.5rem;
    border-radius: var(--border-radius);
    background: #fff;
    box-shadow: var(--shadow-light);
    position: relative;
    overflow: hidden;
}

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

.contact-info-card {
    padding: 2.5rem;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, #F85C70, #79A9F5) !important;
    background-color: #F85C70 !important;
    color: white;
    box-shadow: var(--shadow-medium);
    position: relative;
}

.contact-info-card h4 {
    color: white !important;
    margin-bottom: 2rem;
    font-weight: 600;
}

.contact-info-card h6 {
    color: white !important;
    font-weight: 500;
}

.contact-info-card .text-muted {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 400;
}

.contact-info-card .icon-md,
.contact-info-card i {
    font-size: 1.5rem;
    color: white !important;
    opacity: 1;
}

/* Contact Info Card Social Links */
.contact-info-card .social-link {
    background: rgba(255, 255, 255, 0.15) !important;
    color: white !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.contact-info-card .social-link:hover {
    background: rgba(255, 255, 255, 0.25) !important;
    color: white !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.contact-info-card .social-link i {
    color: white !important;
}

.contact-info-card .row {
    align-items: center;
    margin-bottom: 1.5rem;
}

.contact-info-card .col-1 {
    display: flex;
    justify-content: center;
    align-items: center;
    min-width: 50px;
}

/* Specific text color overrides */
.contact-info-card h4,
.contact-info-card h5,
.contact-info-card h6,
.contact-info-card p,
.contact-info-card span {
    color: white !important;
}

/* Force background gradient */
div.contact-info-card {
    background: linear-gradient(135deg, #F85C70, #79A9F5) !important;
    background-color: #F85C70 !important;
}

/* Override any Bootstrap background classes */
.contact-info-card.bg-white,
.contact-info-card.bg-light {
    background: linear-gradient(135deg, #F85C70, #79A9F5) !important;
    background-color: #F85C70 !important;
}

.form-control {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    padding: 1rem;
    transition: var(--transition);
    font-family: var(--font-primary);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(248,92,112,0.25);
}

/* Enhanced About Section */
.about-card {
    padding: 2rem;
}

.brand-img,
.brand-img-mobile {
    border-radius: 50%;
    transition: var(--transition);
    box-shadow: var(--shadow-medium);
}

.brand-img:hover,
.brand-img-mobile:hover {
    transform: scale(1.05);
}

/* Enhanced Skills Section */
.info li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
    transition: var(--transition);
}

.info li:hover {
    padding-left: 1rem;
    color: var(--primary-color);
}

.info li span {
    font-weight: 600;
    color: var(--text-dark);
}

/* Enhanced Footer */
.footer {
    background: var(--text-dark);
    color: white;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

/* Enhanced About Section Styling */
.about-card {
    padding: 2rem;
    position: relative;
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    margin-bottom: 2rem;
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.about-card h3 {
    color: var(--text-dark);
    font-weight: 600;
    margin-bottom: 1rem;
}

.line {
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    display: block;
    border-radius: 2px;
}

/* Enhanced Skills Visualization */
.progress {
    position: relative;
    margin-bottom: 1.5rem;
}

.progress::before {
    content: attr(data-skill);
    position: absolute;
    right: 0;
    top: -25px;
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: 500;
}

/* Enhanced Portfolio Grid */
.portfolio-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Modern Card Design */
.resume .card {
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: none;
    overflow: hidden;
}

.resume .card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-medium);
}

.resume .card-header {
    background: linear-gradient(135deg, #fff, var(--bg-light));
    border-bottom: none;
    padding: 2rem 2rem 1rem;
}

.resume .card-body {
    padding: 1rem 2rem 2rem;
}

/* Enhanced Experience Timeline */
.resume .card-body hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    margin: 1.5rem 0;
}

/* Responsive Enhancements */
@media (max-width: 768px) {
    .header {
        min-height: 70vh;
        background-attachment: scroll;
    }
    
    .header-title {
        font-size: 2.5rem;
    }
    
    .header-mono {
        font-size: 1rem;
    }
    
    .social-icons {
        justify-content: center;
        gap: 0.5rem;
    }
    
    .filters {
        gap: 0.5rem;
    }
    
    .filters a {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .contact-form-card,
    .contact-info-card {
        padding: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .portfolio-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .about-card {
        padding: 1.5rem;
    }
}

/* Animation Utilities */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* Intersection Observer Animation */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.animate-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
    animation: loading-shine 1.5s infinite;
}

@keyframes loading-shine {
    0% { left: -100%; }
    100% { left: 100%; }
}

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

/* Focus States */
.btn:focus,
.nav-link:focus,
.social-link:focus,
.form-control:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .card {
        border: 2px solid var(--text-dark);
    }
    
    .social-link {
        border: 2px solid currentColor;
    }
}

/* Enhanced Skill Icons */
.expertise-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.expertise-icon:hover {
    transform: scale(1.1);
    box-shadow: 0 10px 30px rgba(248, 92, 112, 0.3);
}

/* Modern Section Headings */
.section h2 {
    position: relative;
    font-weight: 700;
    margin-bottom: 3rem;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

/* Enhanced Footer */
.footer {
    background: var(--text-dark);
    color: white;
    position: relative;
    padding: 2rem 0;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

.footer .text-danger {
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Loading Animation for Images */
.img-loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
}

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

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-dark: #ffffff;
        --text-light: #e9ecef;
        --bg-light: #2d3748;
    }
    
    .navbar {
        background-color: rgba(45,55,72,0.95) !important;
    }
    
    .card,
    .about-card {
        background: #2d3748;
        color: white;
    }
    
    .form-control {
        background: #2d3748;
        border-color: #4a5568;
        color: white;
    }
    
    .contact-form-card {
        background: #2d3748;
        color: white;
    }
}