/* Custom animations and styles */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* Custom CSS Variables */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);

    /* Light mode colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --card-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.9);
    --nav-bg-scrolled: rgba(255, 255, 255, 0.95);
}

/* Dark mode colors */
.dark {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --border-color: #374151;
    --card-bg: #1f2937;
    --nav-bg: rgba(17, 24, 39, 0.9);
    --nav-bg-scrolled: rgba(17, 24, 39, 0.95);
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

html, body {
    max-width: 100%;
    overflow-x: hidden;
    position: relative;
}

/* Prevent horizontal scroll from any element */
section {
    max-width: 100vw;
    overflow-x: hidden;
}

#home {
    max-width: 100vw;
}

/* Animated Stars Background */
#stars, #stars2, #stars3 {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    display: block;
}

#stars {
    background: transparent;
    animation: animateStars 50s linear infinite;
}

#stars:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(1px 1px at 100px 50px, #fff, transparent),
        radial-gradient(1px 1px at 200px 150px, #fff, transparent),
        radial-gradient(1px 1px at 300px 250px, #fff, transparent),
        radial-gradient(1px 1px at 400px 350px, #fff, transparent),
        radial-gradient(1px 1px at 500px 100px, #fff, transparent),
        radial-gradient(1px 1px at 600px 200px, #fff, transparent),
        radial-gradient(1px 1px at 700px 300px, #fff, transparent),
        radial-gradient(1px 1px at 800px 400px, #fff, transparent),
        radial-gradient(1px 1px at 150px 450px, #fff, transparent),
        radial-gradient(1px 1px at 250px 550px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 50px 200px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 350px 100px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 450px 450px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 550px 550px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 650px 50px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 750px 150px, #fff, transparent),
        radial-gradient(1px 1px at 850px 250px, #fff, transparent),
        radial-gradient(1px 1px at 950px 350px, #fff, transparent),
        radial-gradient(1px 1px at 1050px 450px, #fff, transparent),
        radial-gradient(1px 1px at 1150px 550px, #fff, transparent);
    background-repeat: repeat;
    background-size: 1200px 600px;
    animation: animateStars 100s linear infinite;
}

#stars2 {
    background: transparent;
    animation: animateStars 100s linear infinite;
}

#stars2:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(2px 2px at 50px 100px, rgba(255,255,255,0.8), transparent),
        radial-gradient(2px 2px at 150px 300px, rgba(255,255,255,0.8), transparent),
        radial-gradient(2px 2px at 250px 500px, rgba(255,255,255,0.8), transparent),
        radial-gradient(2px 2px at 350px 200px, rgba(255,255,255,0.8), transparent),
        radial-gradient(2px 2px at 450px 400px, rgba(255,255,255,0.8), transparent),
        radial-gradient(2px 2px at 550px 100px, rgba(255,255,255,0.8), transparent),
        radial-gradient(2px 2px at 650px 350px, rgba(255,255,255,0.8), transparent),
        radial-gradient(2px 2px at 750px 550px, rgba(255,255,255,0.8), transparent),
        radial-gradient(2.5px 2.5px at 100px 450px, rgba(255,255,255,0.9), transparent),
        radial-gradient(2.5px 2.5px at 300px 50px, rgba(255,255,255,0.9), transparent),
        radial-gradient(2.5px 2.5px at 500px 250px, rgba(255,255,255,0.9), transparent),
        radial-gradient(2.5px 2.5px at 700px 150px, rgba(255,255,255,0.9), transparent);
    background-repeat: repeat;
    background-size: 800px 600px;
    animation: animateStars 150s linear infinite;
}

#stars3 {
    background: transparent;
    animation: animateStars 150s linear infinite;
}

#stars3:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(3px 3px at 200px 200px, rgba(255,255,255,0.6), transparent),
        radial-gradient(3px 3px at 400px 400px, rgba(255,255,255,0.6), transparent),
        radial-gradient(3px 3px at 600px 100px, rgba(255,255,255,0.6), transparent),
        radial-gradient(3px 3px at 100px 500px, rgba(255,255,255,0.6), transparent),
        radial-gradient(3.5px 3.5px at 300px 300px, rgba(255,255,255,0.5), transparent),
        radial-gradient(3.5px 3.5px at 500px 500px, rgba(255,255,255,0.5), transparent);
    background-repeat: repeat;
    background-size: 700px 600px;
    animation: animateStars 200s linear infinite;
}

@keyframes animateStars {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(-600px);
    }
}

/* Twinkling effect for stars */
.stars-container {
    opacity: 0.8;
}

/* Gradient text animation */
.animate-gradient {
    background-size: 200% 200%;
    animation: gradientShift 3s ease infinite;
}

/* Scroll down indicator animation */
@keyframes scroll-down {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(6px);
    }
}

.animate-scroll-down {
    animation: scroll-down 1.5s ease-in-out infinite;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
}

/* Custom animations */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

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

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

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

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

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* Navigation enhancements */
.nav-link {
    position: relative;
    overflow: hidden;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #a855f7, #ec4899);
    transition: width 0.3s ease;
}

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

/* Scrolled navbar styles */
.scrolled .nav-link::after {
    background: linear-gradient(90deg, #667eea, #764ba2);
}

/* Skill bars animation */
.skill-bar {
    width: 0;
    transition: width 2s ease-in-out;
}

.skill-bar.animate {
    width: var(--width);
}

/* Project cards hover effects */
.project-card {
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.project-card:hover::before {
    left: 100%;
}

/* Service cards */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    transition: all 0.3s ease;
    transform: translate(-50%, -50%);
}

.service-card:hover::after {
    width: 300px;
    height: 300px;
}

/* Testimonial cards */
.testimonial-card {
    position: relative;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.testimonial-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.testimonial-card:hover::before {
    opacity: 1;
}

/* Technology icons */
.tech-icon {
    transition: all 0.3s ease;
    cursor: pointer;
}

.tech-icon:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* Form enhancements */
input:focus,
textarea:focus {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* Button animations */
button,
.btn {
    position: relative;
    overflow: hidden;
}

button::before,
.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

button:hover::before,
.btn:hover::before {
    width: 300px;
    height: 300px;
}

/* Loading states */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Intersection Observer animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.8s ease;
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.8s ease;
}

.fade-in-up.visible,
.fade-in-left.visible,
.fade-in-right.visible {
    opacity: 1;
    transform: translate(0, 0);
}

/* Mobile menu animation */
#mobile-menu {
    animation: slideDown 0.3s ease;
}

/* Back to top button */
#back-to-top {
    transition: all 0.3s ease;
}

#back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* Parallax effect */
.parallax {
    transform: translateZ(0);
    will-change: transform;
}

/* Text gradient animation */
.gradient-text {
    background: linear-gradient(-45deg, #667eea, #764ba2, #667eea, #764ba2);
    background-size: 400% 400%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s ease infinite;
}

/* Responsive design enhancements */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .service-card,
    .project-card,
    .testimonial-card {
        margin-bottom: 1rem;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .bg-gradient-to-r,
    .bg-gradient-to-br {
        background: #000;
        color: #fff;
    }
}

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

/* Print styles */
@media print {
    .no-print,
    nav,
    footer,
    #back-to-top {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #667eea;
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}

/* Theme toggle button */
.theme-toggle-btn {
    position: relative;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle-btn:hover {
    transform: scale(1.1);
}

.theme-toggle-btn .sun-icon,
.theme-toggle-btn .moon-icon {
    position: absolute;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle-btn .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
    color: #fbbf24;
}

.theme-toggle-btn .moon-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0);
    color: #a78bfa;
}

.dark .theme-toggle-btn .sun-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0);
}

.dark .theme-toggle-btn .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
    color: #fbbf24;
}

/* Scrolled navbar theme toggle */
.scrolled .theme-toggle-btn {
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%) !important;
    border-color: transparent !important;
}

.scrolled .theme-toggle-btn .sun-icon {
    color: #f59e0b;
}

.scrolled .theme-toggle-btn:hover {
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Dark mode overrides for Tailwind classes */
.dark body {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.dark .bg-white {
    background-color: var(--bg-primary) !important;
}

.dark .bg-gray-50 {
    background-color: var(--bg-secondary) !important;
}

.dark .bg-gray-100 {
    background-color: var(--bg-tertiary) !important;
}

.dark .text-gray-900 {
    color: var(--text-primary) !important;
}

.dark .text-gray-800 {
    color: var(--text-primary) !important;
}

.dark .text-gray-700 {
    color: var(--text-secondary) !important;
}

.dark .text-gray-600 {
    color: var(--text-secondary) !important;
}

.dark .text-gray-500 {
    color: var(--text-muted) !important;
}

.dark .text-gray-400 {
    color: var(--text-muted) !important;
}

.dark .border-gray-200,
.dark .border-gray-300 {
    border-color: var(--border-color) !important;
}

.dark .bg-gray-900 {
    background-color: #030712 !important;
}

/* Dark mode navigation */
.dark nav {
    background-color: var(--nav-bg) !important;
    border-color: var(--border-color) !important;
}

.dark nav.scrolled {
    background-color: var(--nav-bg-scrolled) !important;
}

/* Dark mode hero section */
.dark #home {
    background: linear-gradient(to bottom right, #1e3a5f, var(--bg-primary), #2d1b4e) !important;
}

.dark #home .bg-blue-200 {
    background-color: rgba(59, 130, 246, 0.3) !important;
}

.dark #home .bg-purple-200 {
    background-color: rgba(139, 92, 246, 0.3) !important;
}

.dark #home .bg-pink-200 {
    background-color: rgba(236, 72, 153, 0.3) !important;
}

/* Dark mode cards */
.dark .project-card,
.dark .service-card,
.dark .testimonial-card {
    background-color: var(--card-bg) !important;
}

.dark .project-card::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
}

/* Dark mode service cards backgrounds */
.dark .bg-gradient-to-br.from-blue-50,
.dark .bg-gradient-to-br.from-green-50,
.dark .bg-gradient-to-br.from-purple-50,
.dark .bg-gradient-to-br.from-orange-50,
.dark .bg-gradient-to-br.from-teal-50,
.dark .bg-gradient-to-br.from-indigo-50 {
    background: var(--card-bg) !important;
}

/* Dark mode form inputs */
.dark input,
.dark textarea {
    background-color: var(--bg-tertiary) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

.dark input::placeholder,
.dark textarea::placeholder {
    color: var(--text-muted) !important;
}

.dark input:focus,
.dark textarea:focus {
    border-color: #667eea !important;
}

/* Dark mode skill bars */
.dark .bg-gray-200 {
    background-color: var(--bg-tertiary) !important;
}

/* Dark mode tech icons */
.dark .tech-icon {
    background-color: var(--bg-tertiary) !important;
}

/* Dark mode mobile menu */
.dark #mobile-menu {
    background-color: var(--bg-primary) !important;
    border-color: var(--border-color) !important;
}

/* Dark mode scrollbar */
.dark ::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

/* Smooth transition for theme change */
html.transitioning,
html.transitioning *,
html.transitioning *::before,
html.transitioning *::after {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease !important;
}