/* Modern Dark Theme Portfolio CSS */

/* CSS Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Dark Theme Color Palette */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    --accent-primary: #00d4ff;
    --accent-secondary: #0099cc;
    --accent-hover: #00b8e6;
    --border-color: #333333;
    --card-bg: #111111;
    --card-hover: #1f1f1f;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    max-width: 65ch;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-hover);
}

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

.section {
    padding: var(--space-3xl) 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.section:first-child {
    min-height: 100vh;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: transform var(--transition-normal);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
}

/* Resume Link - Left side of navbar */
.nav-left {
    display: flex;
    align-items: baseline;
    gap: var(--space-md);
}

.nav-resume {
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-resume:hover,
.nav-resume.active {
    color: var(--accent-primary);
}

.nav-resume.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-primary);
}

.nav-resume i {
    margin-right: var(--space-xs);
}

/* Hide Resume from hamburger menu on desktop */
.nav-link-mobile-only {
    display: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-primary);
}

/* Mobile Navigation */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

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

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--space-lg);
        transform: translateY(-100%);
        transition: transform var(--transition-normal);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        transform: translateY(0);
    }

    /* Resume Link - Mobile Styles */
    .nav-left {
        gap: var(--space-sm);
    }

    /* Hide text on mobile, show icon only */
    .nav-resume .resume-text {
        display: none;
    }

    /* Show Resume in hamburger menu */
    .nav-link-mobile-only {
        display: flex;
        align-items: center;
        gap: var(--space-xs);
        border-bottom: 1px solid var(--border-color);
        padding-bottom: var(--space-sm);
        margin-bottom: var(--space-sm);
    }
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    min-height: 100vh;
    text-align: center;
    background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
}

.hero-content {
    width: 100%;
}

.hero-greeting {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    max-width: none;
}

.hero-name {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    font-weight: var(--font-weight-light);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin: 0 auto var(--space-xl);
    max-width: 600px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.btn-primary {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

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

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-primary);
}

.btn-group {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Project Cards */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.project-card:hover {
    background: var(--card-hover);
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.project-card:hover .project-image {
    transform: scale(1.05);
}

.project-content {
    padding: var(--space-lg);
}

.project-title {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.tech-tag {
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.contact-info h3 {
    margin-bottom: var(--space-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.contact-icon {
    width: 24px;
    height: 24px;
    color: var(--accent-primary);
}

/* Social Links */
.social-links {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-top: var(--space-xl);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.social-link:hover svg {
    color: var(--bg-primary);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-xl) 0;
    text-align: center;
}

.footer-content {
    color: var(--text-muted);
    max-width: var(--container-max-width, 1200px);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.footer-content p {
    margin: 0 auto var(--space-sm);
    max-width: none;
}

/* Image Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.lightbox-content {
    position: relative;
    margin: auto;
    padding: 20px;
    width: 90%;
    max-width: 1200px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    max-width: 100%;
    max-height: 90%;
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: var(--text-primary);
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color var(--transition-fast);
    z-index: 10000;
}

.lightbox-close:hover {
    color: var(--accent-primary);
}

.lightbox-caption {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: var(--text-primary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    text-align: center;
    max-width: 80%;
}

/* Image hover effects for lightbox images */
.lightbox-trigger {
    cursor: pointer;
    transition: all var(--transition-normal);
}

.lightbox-trigger:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-accent { color: var(--accent-primary); }
.text-muted { color: var(--text-muted); }
.mb-0 { margin-bottom: 0; }
.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .section {
        padding: var(--space-2xl) 0;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .btn-group {
        flex-direction: column;
        align-items: center;
    }
    
    .social-links {
        gap: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2.5rem;
    }
    
    .hero-title {
        font-size: 1.25rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}