/* ============================================
   PORTFOLIO STYLES - Subham Panda
   Modern, Responsive, Dark Mode Enabled
   ============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES (Variables)
   ============================================ */
:root {
    /* Light Mode Colors */
    --color-bg-primary: #fafbfc;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #f0f4f8;
    --color-bg-card: #ffffff;
    
    --color-text-primary: #1a1a2e;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;
    
    --color-accent-primary: #0066ff;
    --color-accent-secondary: #00d4ff;
    --color-accent-gradient: linear-gradient(135deg, #00d4ff 0%, #0066ff 100%);
    --color-accent-gradient-hover: linear-gradient(135deg, #00c4ef 0%, #0056df 100%);
    
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-hover: rgba(0, 102, 255, 0.3);
    
    --color-shadow: rgba(0, 0, 0, 0.06);
    --color-shadow-hover: rgba(0, 102, 255, 0.15);
    
    /* Typography */
    --font-primary: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    --font-size-xs: 0.75rem;
    --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: 3.5rem;
    --font-size-6xl: 4.5rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Z-Index */
    --z-navbar: 1000;
    --z-modal: 1100;
    
    /* Navbar Height */
    --navbar-height: 70px;
}

/* Dark Mode Colors */
[data-theme="dark"] {
    --color-bg-primary: #0a0f1a;
    --color-bg-secondary: #0f1629;
    --color-bg-tertiary: #151d32;
    --color-bg-card: #151d32;
    
    --color-text-primary: #e8edf5;
    --color-text-secondary: #a8b4c9;
    --color-text-muted: #6b7a94;
    
    --color-accent-primary: #00d4ff;
    --color-accent-secondary: #0066ff;
    --color-accent-gradient: linear-gradient(135deg, #00d4ff 0%, #0066ff 100%);
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(0, 212, 255, 0.3);
    
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-hover: rgba(0, 212, 255, 0.2);
}

/* ============================================
   BASE STYLES & RESET
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--navbar-height);
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* Selection Styling */
::selection {
    background: var(--color-accent-primary);
    color: white;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-accent-gradient);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-primary);
}

/* ============================================
   CONTAINER
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: rgba(250, 251, 252, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: var(--z-navbar);
    transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(10, 15, 26, 0.85);
}

.navbar.scrolled {
    box-shadow: 0 4px 30px var(--color-shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-accent-primary);
    background: rgba(0, 102, 255, 0.08);
}

[data-theme="dark"] .nav-link:hover {
    background: rgba(0, 212, 255, 0.08);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: rgba(0, 102, 255, 0.08);
    color: var(--color-accent-primary);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

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

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

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    z-index: 1001;
}

.hamburger {
    width: 22px;
    height: 2px;
    background: var(--color-text-primary);
    position: relative;
    transition: all var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 22px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    top: 7px;
}

.mobile-menu-btn.active .hamburger {
    background: transparent;
}

.mobile-menu-btn.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.mobile-menu-btn.active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

.btn-primary {
    background: var(--color-accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 102, 255, 0.4);
}

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

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

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-base);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: var(--navbar-height);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse at center, 
        rgba(0, 212, 255, 0.12) 0%, 
        rgba(0, 102, 255, 0.08) 40%, 
        transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

[data-theme="dark"] .hero-gradient {
    background: radial-gradient(ellipse at center, 
        rgba(0, 212, 255, 0.15) 0%, 
        rgba(0, 102, 255, 0.1) 40%, 
        transparent 70%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 1px, transparent 1px),
        radial-gradient(circle at 80% 70%, rgba(0, 102, 255, 0.15) 1px, transparent 1px),
        radial-gradient(circle at 40% 80%, rgba(0, 212, 255, 0.1) 1px, transparent 1px);
    background-size: 60px 60px, 80px 80px, 100px 100px;
    animation: particles 20s linear infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

@keyframes particles {
    0% { transform: translateY(0); }
    100% { transform: translateY(-100px); }
}

.hero-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
    max-width: 800px;
    align-items: center;
}

.hero-greeting {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-accent-primary);
    font-family: var(--font-mono);
}

.hero-name {
    font-size: clamp(var(--font-size-4xl), 8vw, var(--font-size-6xl));
    font-weight: 800;
    line-height: 1.1;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
    font-weight: 600;
    color: var(--color-text-secondary);
    line-height: 1.2;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    max-width: 600px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    justify-content: center;
}

.hero-social {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    justify-content: center;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--color-bg-card);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.social-link:hover {
    color: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px var(--color-shadow-hover);
}

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

.image-wrapper {
    position: relative;
    width: 350px;
    height: 350px;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-xl);
    position: relative;
    z-index: 2;
    box-shadow: 0 20px 60px var(--color-shadow);
}

.image-ring {
    position: absolute;
    inset: -15px;
    border: 2px solid var(--color-accent-primary);
    border-radius: var(--radius-xl);
    opacity: 0.5;
    animation: ring-pulse 3s ease-in-out infinite;
}

.image-ring.ring-2 {
    inset: -30px;
    opacity: 0.3;
    animation-delay: 0.5s;
}

@keyframes ring-pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.02); opacity: 0.3; }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ============================================
   SECTION STYLES
   ============================================ */
.section {
    padding: var(--spacing-4xl) 0;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-3xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.title-number {
    font-family: var(--font-mono);
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--color-accent-primary);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    background: var(--color-bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.about-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.about-text p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
}

.about-text strong {
    color: var(--color-accent-primary);
    font-weight: 600;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.highlight-card {
    background: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.highlight-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--color-shadow);
}

.highlight-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 800;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.highlight-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 500;
}

/* ============================================
   EXPERIENCE SECTION (Timeline)
   ============================================ */
.timeline {
    position: relative;
    padding-left: var(--spacing-3xl);
}

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

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--spacing-3xl) - 6px);
    top: 8px;
    width: 14px;
    height: 14px;
    background: var(--color-accent-gradient);
    border-radius: var(--radius-full);
    box-shadow: 0 0 0 4px var(--color-bg-primary);
}

.timeline-content {
    background: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--color-border-hover);
    box-shadow: 0 10px 40px var(--color-shadow);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.company-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.company-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.job-title {
    font-size: var(--font-size-base);
    color: var(--color-accent-primary);
    font-weight: 500;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    background: var(--color-bg-tertiary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
}

.timeline-achievements {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.timeline-achievements li {
    display: flex;
    gap: var(--spacing-md);
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.7;
}

.achievement-icon {
    color: var(--color-accent-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.timeline-achievements strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 102, 255, 0.1);
    color: var(--color-accent-primary);
    border-radius: var(--radius-sm);
    font-weight: 500;
}

[data-theme="dark"] .tech-tag {
    background: rgba(0, 212, 255, 0.1);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects {
    background: var(--color-bg-secondary);
}

/* Featured Project */
.featured-project {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-4xl);
    align-items: center;
}

.featured-project-image {
    position: relative;
}

.project-visual {
    position: relative;
    background: var(--color-accent-gradient);
    border-radius: var(--radius-xl);
    padding: var(--spacing-4xl);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    overflow: hidden;
}

.visual-icon {
    color: white;
    opacity: 0.9;
    z-index: 2;
}

.visual-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 40%);
}

.featured-project-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.project-label {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-accent-primary);
    font-weight: 500;
}

.project-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.project-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.8;
}

.project-description p {
    margin-bottom: var(--spacing-lg);
}

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

.project-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.project-features svg {
    color: var(--color-accent-primary);
    flex-shrink: 0;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.project-tech span {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.project-card {
    background: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px var(--color-shadow);
}

.project-card-header {
    margin-bottom: var(--spacing-lg);
}

.project-icon {
    color: var(--color-accent-primary);
}

.project-card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.project-card-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    flex-grow: 1;
}

.project-card-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.project-card-tech span {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

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

.skill-category:hover {
    border-color: var(--color-border-hover);
    box-shadow: 0 10px 30px var(--color-shadow);
}

.category-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
}

.category-title svg {
    color: var(--color-accent-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-tag {
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-accent-gradient);
    color: white;
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

/* ============================================
   EDUCATION SECTION
   ============================================ */
.education {
    background: var(--color-bg-secondary);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.education-card {
    background: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    display: flex;
    gap: var(--spacing-lg);
    transition: all var(--transition-base);
}

.education-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--color-shadow);
}

.education-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--color-accent-gradient);
    color: white;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.education-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.education-degree {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.education-school {
    font-size: var(--font-size-base);
    color: var(--color-accent-primary);
    font-weight: 500;
}

.education-location {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.education-date {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.contact-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    text-align: left;
    transition: all var(--transition-base);
}

.contact-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--color-shadow);
}

.contact-card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--color-bg-tertiary);
    color: var(--color-accent-primary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.contact-card-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.contact-card-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-card-value {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.location-card {
    cursor: default;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-2xl) 0;
}

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

.footer-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-text strong {
    color: var(--color-accent-primary);
    font-weight: 600;
}

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

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    color: var(--color-accent-primary);
    transform: translateY(-2px);
}

.footer-copyright {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ============================================
   ANIMATIONS
   ============================================ */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.6s ease forwards;
}

.animate-fade-left {
    opacity: 0;
    transform: translateX(50px);
    animation: fadeLeft 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scroll Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
    .hero-container {
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-social {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .featured-project {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .skills-container {
        grid-template-columns: 1fr;
    }
    
    .education-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --navbar-height: 60px;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .section {
        padding: var(--spacing-3xl) 0;
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    /* Mobile Navigation */
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-bg-primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-xl);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        font-size: var(--font-size-xl);
        padding: var(--spacing-md) var(--spacing-xl);
    }
    
    /* Hero Mobile */
    .hero-cta {
        flex-direction: column;
        width: 100%;
        max-width: 280px;
    }
    
    .btn {
        width: 100%;
    }
    
    .scroll-indicator {
        display: none;
    }
    
    /* Timeline Mobile */
    .timeline {
        padding-left: var(--spacing-xl);
    }
    
    .timeline-marker {
        left: calc(-1 * var(--spacing-xl) - 6px);
    }
    
    .timeline-header {
        flex-direction: column;
    }
    
    .timeline-date {
        align-self: flex-start;
    }
    
    /* Projects Mobile */
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    /* About Highlights Mobile */
    .about-highlights {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .highlight-card {
        padding: var(--spacing-md);
    }
    
    .highlight-number {
        font-size: var(--font-size-2xl);
    }
    
    /* Contact Mobile */
    .contact-cards {
        grid-template-columns: 1fr;
    }
    
    /* Education Mobile */
    .education-card {
        flex-direction: column;
        text-align: center;
    }
    
    .education-icon {
        margin: 0 auto;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .about-highlights {
        grid-template-columns: 1fr;
    }
    
    .contact-card-value {
        font-size: var(--font-size-xs);
    }
}