/* Custom CSS for Portfolio Website - Dark Theme */

/* Root Variables - Dark Theme */
:root {
    --primary-color: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #38bdf8;
    --primary-50: #f0f9ff;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    
    /* Dark Theme Colors */
    --dark-50: #18181b;
    --dark-100: #27272a;
    --dark-200: #3f3f46;
    --dark-300: #52525b;
    --dark-400: #71717a;
    --dark-500: #a1a1aa;
    --dark-600: #d4d4d8;
    --dark-700: #e4e4e7;
    --dark-800: #f4f4f5;
    --dark-900: #fafafa;
    
    --bg-primary: var(--dark-50);
    --bg-secondary: var(--dark-100);
    --text-primary: var(--dark-800);
    --text-secondary: var(--dark-600);
    --border-color: var(--dark-300);
    
    --shadow-dark: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg-dark: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --glow: 0 0 20px rgba(14, 165, 233, 0.3);
    --transition: all 0.3s ease;
    --sidebar-width: 16rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
}

/* Scrollbar Styling - Dark Theme */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-200);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Sidebar Styles - Enhanced Dark Theme */
#sidebar {
    background: var(--dark-100);
    box-shadow: 2px 0 20px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(20px);
}

#sidebar .nav-link {
    position: relative;
    transition: var(--transition);
    border-radius: 8px;
}

#sidebar .nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: linear-gradient(to bottom, var(--primary-color), var(--primary-light));
    border-radius: 0 2px 2px 0;
    transition: var(--transition);
}

#sidebar .nav-link.active {
    background: rgba(14, 165, 233, 0.15);
    color: var(--primary-light);
    box-shadow: var(--glow);
}

#sidebar .nav-link.active::before {
    height: 100%;
}

#sidebar .nav-link:hover {
    background: rgba(14, 165, 233, 0.1);
    color: var(--primary-light);
    transform: translateX(6px);
}

/* Card Styles - Dark Theme */
.card {
    background: var(--dark-100);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow-dark);
    transition: var(--transition);
    border: 1px solid var(--dark-300);
    color: var(--dark-700);
}

.card h3, .card h4, .card h5 {
    color: var(--dark-800);
}

.card p, .card span {
    color: var(--dark-700);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg-dark), var(--glow);
    border-color: var(--primary-color);
}

/* Service Cards - Enhanced Dark Theme */
.service-card {
    background: var(--dark-100);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-dark);
    transition: var(--transition);
    border: 1px solid var(--dark-300);
    position: relative;
    overflow: hidden;
    color: var(--dark-700);
}

.service-card h3, .service-card h4, .service-card h5 {
    color: var(--dark-800);
}

.service-card p {
    color: var(--dark-700);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg-dark), var(--glow);
    border-color: var(--primary-color);
}

.service-icon {
    font-size: 48px;
    margin-bottom: 16px;
    transition: var(--transition);
    color: var(--primary-color);
}

.service-card:hover .service-icon {
    transform: scale(1.2);
    text-shadow: 0 0 20px rgba(14, 165, 233, 0.5);
}

/* Portfolio Items - Dark Theme with Enhanced Visibility */
.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    transition: var(--transition);
    background: var(--dark-100);
    box-shadow: var(--shadow-dark);
    border: 1px solid var(--dark-300);
}

.portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg-dark), var(--glow);
    border-color: var(--primary-color);
}

.portfolio-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: var(--transition);
    opacity: 0.85;
}

.portfolio-item:hover img {
    transform: scale(1.05);
    opacity: 0.2;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(14, 165, 233, 0.98) 0%, 
        rgba(2, 132, 199, 0.98) 50%,
        rgba(3, 105, 161, 0.98) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    padding: 20px;
    backdrop-filter: blur(8px);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

/* Portfolio Card Content */
.portfolio-item .p-6 {
    background: linear-gradient(to bottom, var(--dark-100), var(--dark-50));
    border-top: 1px solid var(--dark-300);
}

.portfolio-item h3 {
    color: var(--dark-900) !important;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.portfolio-item p {
    color: var(--dark-800) !important;
    line-height: 1.6;
}

.portfolio-item .bg-gray-100 {
    background: linear-gradient(135deg, var(--dark-200), var(--dark-300)) !important;
    color: var(--dark-900) !important;
    border: 1px solid var(--dark-400);
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.portfolio-item .text-gray-500 {
    color: var(--dark-700) !important;
    font-weight: 500;
}

.portfolio-item .text-gray-700 {
    color: var(--dark-900) !important;
    font-weight: 600;
}

/* Testimonial Cards - Dark Theme */
.testimonial-card {
    background: var(--dark-100);
    border-radius: 16px;
    padding: 28px;
    box-shadow: var(--shadow-dark);
    transition: var(--transition);
    position: relative;
    border-left: 4px solid var(--primary-color);
    border: 1px solid var(--dark-300);
    color: var(--dark-700);
}

.testimonial-card h3, .testimonial-card h4, .testimonial-card h5 {
    color: var(--dark-800);
}

.testimonial-card p {
    color: var(--dark-700);
}

.testimonial-card .testimonial-author {
    color: var(--dark-600);
    font-size: 0.9rem;
}

.testimonial-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg-dark), var(--glow);
    border-left-color: var(--primary-light);
}

.testimonial-card::before {
    content: '"';
    font-size: 60px;
    color: var(--primary-color);
    position: absolute;
    top: -10px;
    left: 20px;
    font-family: serif;
    opacity: 0.4;
}

/* Blog Cards - Dark Theme */
.blog-card {
    background: var(--dark-100);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-dark);
    transition: var(--transition);
    border: 1px solid var(--dark-300);
    color: var(--dark-700);
}

.blog-card h3, .blog-card h4, .blog-card h5 {
    color: var(--dark-800);
}

.blog-card p {
    color: var(--dark-700);
}

.blog-card .blog-meta {
    color: var(--dark-600);
    font-size: 0.9rem;
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg-dark), var(--glow);
    border-color: var(--primary-color);
}

.blog-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

.blog-card:hover img {
    transform: scale(1.08);
}

/* Button Enhancements - Dark Theme */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
    box-shadow: var(--shadow-dark), 0 0 0 rgba(14, 165, 233, 0.5);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg-dark), 0 0 25px rgba(14, 165, 233, 0.5);
}

.btn-secondary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 0 25px rgba(14, 165, 233, 0.4);
}

/* Skill Tags - Dark Theme */
.skill-tag {
    background: linear-gradient(135deg, var(--dark-200) 0%, var(--dark-300) 100%);
    color: var(--dark-700);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    margin: 4px;
    display: inline-block;
    transition: var(--transition);
    box-shadow: var(--shadow-dark);
    border: 1px solid var(--dark-400);
    position: relative;
    overflow: hidden;
}

.skill-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(14, 165, 233, 0.2), transparent);
    transition: left 0.5s ease;
}

.skill-tag:hover::before {
    left: 100%;
}

.skill-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg-dark);
    border-color: var(--primary-400);
    color: var(--dark-800);
    background: linear-gradient(135deg, var(--dark-300) 0%, var(--dark-400) 100%);
}

/* Skill Bullet List - Dark Theme */
.skill-bullet-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.skill-bullet-item {
    padding: 8px 0;
    transition: var(--transition);
    border-radius: 6px;
    padding-left: 8px;
    margin-left: -8px;
}

.skill-bullet-item:hover {
    background: rgba(14, 165, 233, 0.1);
    padding-left: 16px;
    margin-left: 0;
}

.skill-bullet-item i {
    font-size: 16px;
    transition: var(--transition);
}

.skill-bullet-item:hover i {
    transform: scale(1.2);
    color: var(--primary-light);
}

.skill-bullet-item span {
    color: var(--dark-700);
    font-size: 15px;
    font-weight: 500;
    line-height: 1.6;
}

.skill-bullet-item:hover span {
    color: var(--dark-800);
}

/* Form Styles - Dark Theme */
.form-control {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--dark-300);
    border-radius: 10px;
    font-size: 16px;
    transition: var(--transition);
    background: var(--dark-200);
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
    background: var(--dark-100);
}

.form-control::placeholder {
    color: var(--dark-600);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-15px);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(14, 165, 233, 0.2);
    }
    50% {
        box-shadow: 0 0 30px rgba(14, 165, 233, 0.4);
    }
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn 1.2s ease-out;
}

.animate-slide-up {
    animation: slideUp 1.2s ease-out;
}

.animate-slide-up-delay {
    animation: slideUp 1.2s ease-out 0.3s both;
}

.animate-fade-in-delay {
    animation: fadeIn 1.2s ease-out 0.5s both;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 1.2s ease-out 0.7s both;
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

.animate-glow {
    animation: glow 3s ease-in-out infinite;
}

/* Portfolio Filters - Dark Theme with Enhanced Contrast */
.portfolio-filter {
    transition: var(--transition);
    position: relative;
    border: 2px solid transparent;
    font-weight: 600;
    letter-spacing: 0.025em;
}

.portfolio-filter.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white !important;
    box-shadow: var(--shadow-dark), 0 0 20px rgba(14, 165, 233, 0.5);
    border-color: var(--primary-light);
}

.portfolio-filter:not(.active) {
    background: var(--dark-200);
    color: var(--dark-900) !important;
    border-color: var(--dark-400);
}

.portfolio-filter:not(.active):hover {
    background: var(--dark-300);
    color: var(--dark-900) !important;
    transform: translateY(-2px);
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Social Icons - Dark Theme */
.social-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark-200);
    color: var(--dark-600);
    transition: var(--transition);
    text-decoration: none;
    border: 1px solid var(--dark-300);
}

.social-icon:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
    border-color: var(--primary-light);
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.glass-effect {
    background: rgba(39, 39, 42, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .card {
        padding: 20px;
    }
    
    .service-card {
        padding: 24px 16px;
    }
    
    #sidebar .nav-link:hover {
        transform: translateX(3px);
    }
}

/* Portfolio Card Text Enhancements */
#portfolio-container .portfolio-item h3 {
    color: #fafafa !important;
    font-weight: 700 !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: 0.025em;
}

#portfolio-container .portfolio-item p {
    color: #e4e4e7 !important;
    font-weight: 400 !important;
    line-height: 1.7;
}

#portfolio-container .portfolio-item .text-gray-600 {
    color: #e4e4e7 !important;
}

#portfolio-container .portfolio-item .text-gray-700 {
    color: #fafafa !important;
    font-weight: 600 !important;
}

#portfolio-container .portfolio-item .text-gray-500 {
    color: #d4d4d8 !important;
    font-weight: 500 !important;
}

#portfolio-container .portfolio-item .bg-gray-100 {
    background: linear-gradient(135deg, #3f3f46, #52525b) !important;
    color: #f4f4f5 !important;
    border: 1px solid #71717a;
}

#portfolio-container .portfolio-item .border-gray-700 {
    border-color: #52525b !important;
}

#portfolio-container .portfolio-item .text-green-400 {
    color: #4ade80 !important;
}

/* Custom Selection Colors */
::selection {
    background: rgba(14, 165, 233, 0.3);
    color: white;
}

::-moz-selection {
    background: rgba(14, 165, 233, 0.3);
    color: white;
}

/* Loading Spinner - Dark Theme */
#loading {
    background: var(--dark-50);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--dark-300);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Enhanced Hover Effects */
.hover-lift {
    transition: var(--transition);
}

.hover-lift:hover {
    transform: translateY(-5px);
}

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

.hover-glow:hover {
    box-shadow: 0 0 30px rgba(14, 165, 233, 0.3);
}

/* Progress Indicators */
.progress-bar {
    width: 100%;
    height: 10px;
    background: var(--dark-300);
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 5px;
    transition: width 2s ease;
    box-shadow: 0 0 10px rgba(14, 165, 233, 0.3);
}

/* Mobile Menu Enhancements */
@media (max-width: 1023px) {
    #sidebar {
        z-index: 60;
        box-shadow: 0 0 50px rgba(0, 0, 0, 0.8);
    }
    
    #sidebar.show {
        transform: translateX(0);
    }
    
    #sidebar-overlay.show {
        display: block;
        opacity: 1;
        background: rgba(0, 0, 0, 0.8);
    }
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        color: black !important;
        background: white !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #ccc !important;
        background: white !important;
    }
}