/* ============================================
   CSS Variables & Theme Configuration
============================================ */
:root {
    /* Primary Colors - Blue Theme */
    --primary-color: #0066cc;
    --primary-dark: #004a99;
    --primary-light: #3399ff;

    /* Secondary Colors */
    --secondary-color: #6366f1;
    --secondary-dark: #4f46e5;

    /* Accent Colors */
    --accent-color: #10b981;
    --accent-warm: #f59e0b;

    /* Neutral Colors - Dark Theme (Default) */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a2e;
    --text-primary: #ffffff;
    --text-secondary: #b4b4c7;
    --text-muted: #6b6b85;

    /* Border Colors */
    --border-color: rgba(0, 102, 204, 0.2);
    --border-light: rgba(0, 102, 204, 0.1);

    /* Gradient Colors */
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    --gradient-glow: linear-gradient(135deg, rgba(0, 102, 204, 0.3), rgba(51, 153, 255, 0.3));

    /* Spacing */
    --section-padding: 30px;
    --container-width: 1200px;

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

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 102, 204, 0.3);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
}

/* Light Theme Variables */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border-color: rgba(0, 102, 204, 0.2);
    --border-light: rgba(0, 102, 204, 0.1);
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background-color var(--transition-base), color var(--transition-base);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    position: relative;
}

/* ============================================
   Loading Screen
============================================ */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader {
    text-align: center;
}

.logo-text {
    font-family: 'Fira Code', monospace;
    font-size: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s ease-in-out infinite;
}

.progress-bar {
    width: 200px;
    height: 4px;
    background: var(--bg-secondary);
    border-radius: 2px;
    margin-top: 1.5rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 2px;
    animation: progressLoad 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(0.98); }
}

@keyframes progressLoad {
    0% { width: 0%; margin-left: 0; }
    50% { width: 100%; margin-left: 0; }
    100% { width: 100%; margin-left: 200px; }
}

/* ============================================
   Navigation Bar
============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 0;
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
}

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

.logo {
    font-family: 'Fira Code', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    position: relative;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-light);
}

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

/* Hamburger Menu */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle.active .hamburger::after {
    transform: rotate(-45deg);
    bottom: 0;
}

/* ============================================
   Hero Section
============================================ */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

/* Background Animation */
.hero-bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: floatParticle var(--duration) ease-in-out infinite;
    opacity: 0.5;
}

.particle:nth-child(1) { left: 10%; animation-delay: 0s; --duration: 8s; }
.particle:nth-child(2) { left: 20%; animation-delay: 1s; --duration: 10s; }
.particle:nth-child(3) { left: 30%; animation-delay: 2s; --duration: 7s; }
.particle:nth-child(4) { left: 50%; animation-delay: 1.5s; --duration: 9s; }
.particle:nth-child(5) { left: 70%; animation-delay: 2.5s; --duration: 8.5s; }
.particle:nth-child(6) { left: 85%; animation-delay: 3s; --duration: 11s; }

@keyframes floatParticle {
    0%, 100% { transform: translateY(0) translateX(0); opacity: 0.5; }
    25% { transform: translateY(-30px) translateX(20px); opacity: 0.8; }
    50% { transform: translateY(-60px) translateX(-15px); opacity: 0.4; }
    75% { transform: translateY(-30px) translateX(10px); opacity: 0.7; }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content .hero-greeting {
    font-size: 1.2rem;
    color: var(--primary-light);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.hero-name {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 3rem; /* Reserve space for longest title */
}

.hero-title .typewriter {
    display: inline-block;
    min-width: 25ch; /* Reserve space for longest title */
}

.cursor {
    animation: blink 0.7s ease-in-out infinite;
    color: var(--primary-color);
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-tagline {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    max-width: 600px;
}

.hero-location {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 2rem;
}

.hero-location i {
    font-size: 1.2rem;
}

/* Hero Buttons */
.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.btn {
    padding: 0.9rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 102, 204, 0.5);
}

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

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

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

.btn-outline:hover {
    border-color: var(--primary-color);
    background: rgba(14, 165, 233, 0.1);
}

/* Hero Social Links */
.hero-social-links {
    display: flex;
    gap: 1.5rem;
}

.hero-social-links a {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--text-secondary);
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

.hero-social-links a:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-5px);
}

/* Hero Visual - Code Block */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-container {
    position: relative;
}

.profile-glow {
    position: absolute;
    width: 400px;
    height: 400px;
    background: var(--gradient-glow);
    border-radius: 50%;
    filter: blur(60px);
    animation: pulseGlow 3s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.code-block {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    font-family: 'Fira Code', monospace;
    position: relative;
    z-index: 1;
}

.code-header {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-tertiary);
}

.code-header .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-header .red { background: #ff5f56; }
.code-header .yellow { background: #ffbd2e; }
.code-header .green { background: #27ca3f; }

.code-block pre {
    padding: 1.5rem;
    overflow-x: auto;
}

.code-block code {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.code-block .keyword { color: #c678dd; }
.code-block .class-name { color: #e5c07b; }
.code-block .method { color: #61afef; }
.code-block .string { color: #98c379; }
.code-block .number { color: #d19a66; }

/* Scroll Down Button */
.scroll-down {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    color: var(--text-muted);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ============================================
   Section Styles
============================================ */
.section {
    padding: var(--section-padding) 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    text-align: center;
    margin-bottom: 1rem;
    position: relative;
}

.section-divider {
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    margin: 0 auto 2rem;
}

/* ============================================
   About Section
============================================ */
.about-section {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.about-text strong {
    color: var(--primary-light);
}

/* About Stats */
.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.stat-card {
    text-align: center;
    padding: 2rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 180px;
}

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

.stat-card i {
    font-size: 2rem;
    color: var(--primary-light);
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.stat-value {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
    margin-bottom: 0.5rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-label {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.4;
}

/* About Highlight Cards */
.about-highlight {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.highlight-card {
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
    padding: 1.25rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
    transition: all var(--transition-base);
}

.highlight-card:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.highlight-card i {
    font-size: 1.6rem;
    color: var(--primary-light);
    margin-bottom: 0.6rem;
}

.highlight-card h3 {
    margin-bottom: 0.4rem;
    color: var(--text-primary);
    font-size: 1.05rem;
}

.highlight-card p {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* ============================================
   Skills Section
============================================ */
.skills-section {
    background: var(--bg-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 4rem;
}

.skill-category {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

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

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.category-icon {
    font-size: 2rem;
    color: var(--primary-light);
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-tag {
    padding: 0.6rem 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-base);
}

.skill-tag:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

/* Skills Progress */
.skills-progress {
    max-width: 800px;
    margin: 0 auto;
}

.progress-item {
    margin-bottom: 2rem;
}

.progress-label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.progress-bar-bg {
    height: 10px;
    background: var(--bg-tertiary);
    border-radius: 5px;
    overflow: hidden;
}

.progress-bar-fill {
    width: var(--width, 0%);
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 5px;
    position: relative;
    animation: fillProgress 1.5s ease-out forwards;
}

@keyframes fillProgress {
    from { width: 0%; }
}

/* ============================================
   Experience Section
============================================ */
.experience-section {
    background: var(--bg-secondary);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto 4rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--gradient-primary);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item.left {
    justify-content: flex-start;
}

.timeline-item.right {
    justify-content: flex-end;
}

.timeline-dot {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.5);
}

.timeline-content {
    width: 42%;
    background: var(--bg-tertiary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-glow);
    border-color: var(--primary-color);
}

.timeline-date {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(14, 165, 233, 0.1);
    color: var(--primary-light);
    border-radius: 20px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.timeline-content h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.timeline-content h4 {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.timeline-content ul {
    list-style: none;
}

.timeline-content li {
    display: flex;
    align-items: start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-muted);
}

.timeline-content li i {
    color: var(--accent-color);
    margin-top: 4px;
}

/* Achievement Cards */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.achievement-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

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

.achievement-card i {
    font-size: 2.5rem;
    color: var(--primary-light);
    margin-bottom: 1rem;
}

.achievement-card h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.achievement-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ============================================
   Projects Section
============================================ */
.projects-section {
    background: var(--bg-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

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

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

/* Project Image Placeholder */
.project-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.3);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-link {
    padding: 0.8rem 2rem;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.project-link:hover {
    background: var(--accent-color);
}

/* Project Content */
.project-content {
    padding: 2rem;
}

.project-content h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-description {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* Tech Stack */
.tech-stack {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.tech-stack span {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
    transition: all var(--transition-base);
}

.tech-stack span:hover {
    background: var(--primary-color);
    transform: scale(1.2) rotate(5deg);
}

.project-details {
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
}

.project-details p {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.project-details ul {
    list-style: none;
}

.project-details li {
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.project-details li::before {
    content: '>';
    position: absolute;
    left: 0;
    color: var(--primary-light);
}

/* Project Links */
.project-links {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.btn-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-light);
    font-size: 0.9rem;
    transition: all var(--transition-base);
}

.btn-link:hover {
    color: var(--accent-color);
}

/* Projects CTA */
.projects-cta {
    text-align: center;
    padding: 3rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.projects-cta p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* ============================================
   Contact Section
============================================ */
.contact-section {
    background: var(--bg-secondary);
}

.contact-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 2rem;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.contact-card {
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-primary));
    padding: 2rem 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.contact-card-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.contact-card-icon {
    width: 70px;
    height: 70px;
    background: rgba(0, 102, 204, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    transition: all var(--transition-base);
}

.contact-card:hover .contact-card-icon {
    background: var(--gradient-primary);
}

.contact-card-icon i {
    font-size: 1.8rem;
    color: var(--primary-light);
    transition: color var(--transition-base);
}

.contact-card:hover .contact-card-icon i {
    color: white;
}

.contact-card h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.contact-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.contact-cta {
    color: var(--primary-light);
    font-weight: 600;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap var(--transition-base);
}

.contact-card:hover .contact-cta {
    gap: 0.75rem;
}

.contact-cta i {
    font-size: 0.75rem;
}

.contact-location {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.9rem 1.75rem;
    background: rgba(14, 165, 233, 0.1);
    border-radius: var(--radius-md);
    color: var(--primary-light);
    font-weight: 500;
}

.contact-location i {
    font-size: 1.2rem;
}

/* ============================================
   Footer
============================================ */
.footer {
    background: var(--bg-primary);
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-bottom {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-bottom p {
    margin-bottom: 0.25rem;
}

.footer-bottom p:last-child {
    margin-bottom: 0;
}

.footer-bottom i {
    color: #e74c3c;
}

/* Scroll to Top */
#scrollToTop {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 1.3rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-glow);
}

#scrollToTop.visible {
    opacity: 1;
    visibility: visible;
}

#scrollToTop:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(14, 165, 233, 0.5);
}

/* ============================================
   Responsive Design
============================================ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content .hero-tagline,
    .hero-buttons,
    .hero-social-links {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-container {
        grid-template-columns: 1fr;
    }

    .achievements-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 30px;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 15, 0.98);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .nav-toggle {
        display: block;
    }

    .hero-container {
        gap: 3rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item.left,
    .timeline-item.right {
        justify-content: flex-start !important;
    }

    .timeline-dot {
        left: 20px;
    }

    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 50px;
    }

    .contact-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .contact-card {
        padding: 1.5rem 1rem;
    }

    .contact-card-icon {
        width: 60px;
        height: 60px;
        margin-bottom: 0.75rem;
    }

    .contact-card-icon i {
        font-size: 1.5rem;
    }

    .contact-card h4 {
        font-size: 1rem;
    }

    .contact-card p {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }

    .contact-cta {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

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

    .hero-social-links {
        justify-content: center;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .projects-cta {
        padding: 2rem;
    }

    .contact-section {
        padding: 60px 0;
    }

    .contact-intro {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }

    .contact-cards {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .contact-card {
        flex-direction: row;
        justify-content: flex-start;
        text-align: left;
        padding: 1.25rem;
        gap: 1rem;
    }

    .contact-card .contact-card-content {
        flex: 1;
        align-items: flex-start;
    }

    .contact-card-icon {
        width: 50px;
        height: 50px;
        margin-bottom: 0;
        flex-shrink: 0;
    }

    .contact-card-icon i {
        font-size: 1.3rem;
    }

    .contact-card-content {
        flex: 1;
    }

    .contact-card h4 {
        font-size: 1rem;
        margin-bottom: 0.25rem;
    }

    .contact-card p {
        font-size: 0.85rem;
        margin-bottom: 0.5rem;
    }

    .contact-cta {
        font-size: 0.75rem;
    }

    .contact-location {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
}