/* ========================================
   CSS Reset & Base Styles
   ======================================== */

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

:root {
    /* Color Palette */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --accent-color: #f59e0b;

    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-hover: #334155;

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-hero: linear-gradient(135deg, #6366f1 0%, #ec4899 50%, #f59e0b 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

/* Light Mode Theme */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-hover: #e2e8f0;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.2);
}

[data-theme="light"] .navbar {
    background: rgba(248, 250, 252, 0.9);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.lead {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-primary);
}

.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-medium);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--gradient-hero);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 0;
    z-index: 1000;
    transition: all var(--transition-medium);
}

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

.nav-brand h2 {
    margin: 0;
    font-size: 1.5rem;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

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

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

.nav-link:hover {
    color: var(--text-primary);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-medium);
}

/* Theme Toggle Button */
.theme-toggle {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-medium);
    margin-left: var(--spacing-sm);
}

.theme-toggle:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
    transform: rotate(20deg);
}

.theme-toggle svg {
    transition: all var(--transition-medium);
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

[data-theme="light"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="light"] .theme-toggle .moon-icon {
    display: none;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) 0;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float 20s infinite ease-in-out;
}

.circle-1 {
    width: 300px;
    height: 300px;
    background: var(--gradient-1);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.circle-2 {
    width: 400px;
    height: 400px;
    background: var(--gradient-2);
    top: 50%;
    right: 10%;
    animation-delay: 5s;
}

.circle-3 {
    width: 250px;
    height: 250px;
    background: var(--gradient-3);
    bottom: 10%;
    left: 50%;
    animation-delay: 10s;
}

/* ========================================
   Section Styles
   ======================================== */

section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: 2.5rem;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-hero);
    border-radius: 2px;
}

/* ========================================
   About Section
   ======================================== */

.about {
    background: var(--bg-secondary);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    text-align: center;
}

.about-text p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

/* ========================================
   Stats Section
   ======================================== */

.stats {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
    padding: var(--spacing-xl) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 2px solid rgba(99, 102, 241, 0.2);
    transition: all var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.2);
}

.stat-icon {
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: center;
    align-items: center;
}

.stat-icon svg {
    width: 48px;
    height: 48px;
    stroke: var(--primary-color);
    transition: all var(--transition-fast);
}

.stat-card:hover .stat-icon svg {
    stroke: var(--secondary-color);
    transform: scale(1.1);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    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-xs);
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ========================================
   Skills Section
   ======================================== */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.skill-card {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-medium);
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.skill-icon {
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: flex-start;
    align-items: center;
}

.skill-icon svg {
    width: 48px;
    height: 48px;
    stroke: var(--primary-color);
    transition: all var(--transition-fast);
}

.skill-card:hover .skill-icon svg {
    stroke: var(--secondary-color);
    transform: scale(1.1);
}

.skill-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.skill-card ul {
    list-style: none;
}

.skill-card li {
    color: var(--text-secondary);
    padding: var(--spacing-xs) 0;
    position: relative;
    padding-left: 1.5rem;
}

.skill-card li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* ========================================
   Projects Section
   ======================================== */

.projects {
    background: var(--bg-secondary);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.625rem 1.5rem;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    color: var(--text-primary);
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

/* Carousel Container */
.carousel-container {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.carousel-wrapper {
    flex: 1;
    overflow: hidden;
    border-radius: var(--radius-lg);
    padding: 0 var(--spacing-xs);
}

.projects-carousel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(0, 1fr));
    gap: var(--spacing-md);
    transition: transform 0.5s ease-in-out;
}

.carousel-item {
    width: 100%;
    box-sizing: border-box;
}

.carousel-item .project-card {
    width: 100%;
    height: 450px;
    display: flex;
    flex-direction: column;
}

/* Carousel Buttons */
.carousel-btn {
    background: var(--bg-card);
    border: 2px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.carousel-btn:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.carousel-btn svg {
    width: 24px;
    height: 24px;
}

/* Carousel Dots */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot.active {
    background: var(--primary-color);
    width: 32px;
    border-radius: 6px;
}

.carousel-dot:hover {
    background: rgba(99, 102, 241, 0.5);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 2px solid rgba(99, 102, 241, 0.3);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1),
                0 0 20px rgba(99, 102, 241, 0.1);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    box-sizing: border-box;
    opacity: 0;
    transform: translateY(20px);
    position: relative;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0.8;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2),
                0 0 40px rgba(99, 102, 241, 0.3);
    border-color: var(--primary-color);
}

.project-card:hover::before {
    height: 5px;
    opacity: 1;
}

.project-card.hidden {
    display: none;
}

.project-header {
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    line-height: 1.4;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.project-body {
    padding: var(--spacing-md);
    flex-grow: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.project-tools {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.tool-tag {
    padding: 0.25rem 0.75rem;
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    word-wrap: break-word;
    overflow-wrap: break-word;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-footer {
    padding: var(--spacing-md);
    padding-top: 0;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.project-link:hover {
    color: var(--primary-color);
    gap: 0.75rem;
}

.project-link svg {
    width: 16px;
    height: 16px;
}

/* ========================================
   Pagination
   ======================================== */

.pagination {
    margin-top: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.pagination-controls {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.pagination-btn {
    padding: 0.625rem 1.25rem;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
    font-size: 0.95rem;
}

.pagination-btn:hover:not(:disabled) {
    color: var(--text-primary);
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.pagination-btn.active {
    color: var(--text-primary);
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.2);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   Contact Section
   ======================================== */

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.contact-text {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

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

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    border: 2px solid rgba(255, 255, 255, 0.1);
    font-weight: 500;
    transition: all var(--transition-medium);
}

.contact-link:hover {
    transform: translateX(5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.contact-link svg {
    flex-shrink: 0;
}

/* Contact Form */
.contact-form {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid rgba(99, 102, 241, 0.2);
    box-shadow: var(--shadow-lg);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    background: var(--bg-secondary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-medium);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    width: 100%;
    position: relative;
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-message {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    text-align: center;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.form-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--bg-primary);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.footer-social a:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-social a svg {
    width: 20px;
    height: 20px;
}

.footer p {
    color: var(--text-muted);
    margin: 0;
    text-align: center;
}

/* ========================================
   Animations
   ======================================== */

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

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    /* Projects grid responsive */
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .nav-right {
        gap: var(--spacing-xs);
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-secondary);
        width: 100%;
        text-align: center;
        transition: left var(--transition-medium);
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: var(--shadow-lg);
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .theme-toggle {
        position: relative;
        z-index: 1001;
    }

    .hamburger {
        display: flex;
        position: relative;
        z-index: 1001;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    section {
        padding: var(--spacing-lg) 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }
}

/* ========================================
   Projects Page
   ======================================== */

.projects-page-header {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
    text-align: center;
    position: relative;
}

.page-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.projects-category {
    padding: var(--spacing-xl) 0;
}

.category-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.category-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.category-icon svg {
    width: 40px;
    height: 40px;
    stroke: var(--primary-color);
}

/* ========================================
   Scroll to Top Button
   ======================================== */

.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    transition: all var(--transition-fast);
    opacity: 0;
    visibility: hidden;
    transform: scale(0);
    z-index: 1000;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

.scroll-to-top:hover {
    background: var(--secondary-color);
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(236, 72, 153, 0.5);
}

.scroll-to-top svg {
    width: 24px;
    height: 24px;
}

/* ========================================
   Utility Classes
   ======================================== */

.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }