/* Root Variables for Theming */
:root {
    /* Light Theme Colors */
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --text-primary: #1a1a1a;
    --text-secondary: #4b5563;
    --background: #f3f4f6;
    --surface: rgba(255, 255, 255, 0.8);
    --surface-hover: rgba(255, 255, 255, 0.9);
    --border-color: rgba(0, 0, 0, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --backdrop-blur: 10px;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --primary-color: #3b82f6;
    --secondary-color: #8b5cf6;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --background: #0f172a;
    --surface: rgba(30, 41, 59, 0.8);
    --surface-hover: rgba(51, 65, 85, 0.9);
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    --glass-bg: rgba(17, 25, 40, 0.75);
    --glass-border: rgba(255, 255, 255, 0.125);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    background-image: 
        radial-gradient(at 20% 80%, var(--primary-color) 0px, transparent 50%),
        radial-gradient(at 80% 20%, var(--secondary-color) 0px, transparent 50%),
        radial-gradient(at 40% 40%, var(--primary-color) 0px, transparent 50%);
    background-attachment: fixed;
    min-height: 100vh;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Glassmorphic Card Mixin */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-base);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    cursor: pointer;
    z-index: 1000;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--glass-shadow);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    padding: var(--spacing-sm) 0;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-base);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand a {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-base);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-base);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

/* Hero Section */
.hero {
    padding-top: calc(80px + var(--spacing-2xl));
    padding-bottom: var(--spacing-2xl);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-greeting {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.hero-name {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.hero-title {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 50px;
    border: none;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    cursor: pointer;
    font-size: var(--font-size-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px 0 rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.4);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--surface-hover);
    transform: translateY(-2px);
}

/* Hero Socials */
.hero-socials {
    display: flex;
    gap: var(--spacing-md);
}

.hero-socials a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.hero-socials a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-container {
    position: relative;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border: 2px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Section Styles */
section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: var(--font-size-4xl);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* About Section */
.about-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    padding: var(--spacing-xl);
    box-shadow: var(--glass-shadow);
}

.about-text {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 16px;
    border: 1px solid var(--glass-border);
}

.stat-item h3 {
    font-size: var(--font-size-3xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-item p {
    color: var(--text-secondary);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.skill-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
}

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

.skill-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-2xl);
}

.skill-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.skill-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.skill-list {
    list-style: none;
    text-align: left;
}

.skill-list li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--spacing-md);
}

.skill-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: var(--spacing-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--glass-border);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
}

.timeline-dot {
    position: absolute;
    left: calc(-1 * var(--spacing-xl) - 6px);
    top: 0;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--background);
}

.timeline-content {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    padding: var(--spacing-lg);
}

.timeline-content h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.timeline-content h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.timeline-date {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-info h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-secondary);
}

.contact-item i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--primary-color);
}

.contact-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.contact-item a:hover {
    color: var(--primary-color);
}

/* Contact Form */
.contact-form {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    padding: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* Footer */
.footer {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-top: 1px solid var(--glass-border);
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-top: var(--spacing-2xl);
}

.footer p {
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Mobile Navigation */
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--glass-bg);
        backdrop-filter: blur(var(--backdrop-blur));
        -webkit-backdrop-filter: blur(var(--backdrop-blur));
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--glass-shadow);
        padding: var(--spacing-lg) 0;
        border-top: 1px solid var(--glass-border);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    /* Hero Responsive */
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        order: 2;
    }
    
    .hero-image {
        order: 1;
        margin-bottom: var(--spacing-xl);
    }
    
    .image-container {
        width: 250px;
        height: 250px;
    }
    
    .hero-description {
        margin: 0 auto var(--spacing-lg);
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-socials {
        justify-content: center;
    }
    
    /* About Stats */
    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    /* Skills Grid */
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    /* Contact */
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    /* Theme Toggle */
    .theme-toggle {
        top: var(--spacing-md);
        right: var(--spacing-md);
        width: 40px;
        height: 40px;
        font-size: var(--font-size-lg);
    }
    
    /* Typography */
    .hero-name {
        font-size: var(--font-size-4xl);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
}

@media (max-width: 480px) {
    /* Small Mobile Adjustments */
    .hero-buttons {
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .timeline {
        padding-left: var(--spacing-md);
    }
    
    .timeline-dot {
        left: calc(-1 * var(--spacing-md) - 6px);
    }
}

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

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

/* Apply animations to elements */
.hero-text > * {
    animation: fadeIn 0.8s ease forwards;
    opacity: 0;
}

.hero-text > *:nth-child(1) { animation-delay: 0.1s; }
.hero-text > *:nth-child(2) { animation-delay: 0.2s; }
.hero-text > *:nth-child(3) { animation-delay: 0.3s; }
.hero-text > *:nth-child(4) { animation-delay: 0.4s; }
.hero-text > *:nth-child(5) { animation-delay: 0.5s; }
.hero-text > *:nth-child(6) { animation-delay: 0.6s; }

.hero-image {
    animation: fadeIn 1s ease 0.7s forwards;
    opacity: 0;
}

/* Smooth scroll offset for fixed navbar */
section {
    scroll-margin-top: 80px;
}