/* ===================================
   CSS Variables & Root Styles
   =================================== */
:root {
    /* Dark Theme Colors */
    --color-black: #000000;
    --color-dark-primary: #0a0a0a;
    --color-dark-secondary: #1a1a1a;
    --color-dark-tertiary: #2d2d2d;
    --color-dark-quaternary: #3a3a3a;
    
    /* Text Colors */
    --color-white: #ffffff;
    --color-text-primary: #e5e5e5;
    --color-text-secondary: #a0a0a0;
    --color-text-muted: #6b7280;
    
    /* Accent Colors */
    --color-accent-cyan: #00d9ff;
    --color-accent-purple: #8b5cf6;
    --color-accent-blue: #3b82f6;
    --color-gradient: linear-gradient(135deg, var(--color-accent-cyan) 0%, var(--color-accent-purple) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-secondary: 'Poppins', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 217, 255, 0.3);
    --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
}

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

/* ===================================
   FontAwesome Icon Fallbacks
   =================================== */
/* Ensure FontAwesome icons load properly */
.fab, .fas, .far, .fal, .fad {
    font-family: "Font Awesome 6 Brands", "Font Awesome 6 Free", "Font Awesome 6 Pro", sans-serif !important;
    font-weight: 900;
    font-style: normal;
    font-variant: normal;
    text-rendering: auto;
    line-height: 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Fallback for when FontAwesome doesn't load */
.fab:before, .fas:before, .far:before, .fal:before, .fad:before {
    display: inline-block;
    text-decoration: none;
}

/* Specific icon fallbacks */
.fa-github:before { content: "⚡"; }
.fa-linkedin:before { content: "💼"; }
.fa-twitter:before { content: "🐦"; }
.fa-envelope:before { content: "✉"; }
.fa-chevron-down:before { content: "↓"; }
.fa-laptop-code:before { content: "💻"; }
.fa-mobile-alt:before { content: "📱"; }
.fa-brain:before { content: "🧠"; }
.fa-chart-line:before { content: "📈"; }
.fa-gamepad:before { content: "🎮"; }
.fa-blog:before { content: "📝"; }
.fa-external-link-alt:before { content: "🔗"; }
.fa-download:before { content: "⬇"; }
.fa-graduation-cap:before { content: "🎓"; }
.fa-briefcase:before { content: "💼"; }
.fa-paint-brush:before { content: "🎨"; }
.fa-server:before { content: "🖥"; }
.fa-database:before { content: "🗄"; }
.fa-cogs:before { content: "⚙"; }
.fa-phone:before { content: "📞"; }
.fa-map-marker-alt:before { content: "📍"; }
.fa-paper-plane:before { content: "✈"; }
.fa-heart:before { content: "❤"; }
.fa-arrow-up:before { content: "↑"; }
.fa-user-graduate:before { content: "🎓"; }

html {
    /* Lenis smooth scroll optimizations */
    overflow-x: hidden;
    scroll-padding-top: 80px;
    /* Disable native smooth scroll to let Lenis handle it */
    scroll-behavior: auto;
}

/* Lenis smooth scroll - disable native smooth scroll */
* {
    scroll-behavior: auto;
}

/* Hardware acceleration for smooth scrolling */
body, html {
    -webkit-overflow-scrolling: touch;
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
    /* Optimize for mobile performance */
    scroll-behavior: auto;
    -webkit-scroll-behavior: auto;
    scroll-margin: 0;
    scroll-padding: 0;
    /* Improve scrolling performance on mobile */
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-dark-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    /* Disable smooth scroll on mobile for better performance */
    scroll-behavior: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    /* Improve rendering performance */
    will-change: scroll-position;
    transform: translate3d(0, 0, 0);
}

::selection {
    background-color: var(--color-accent-cyan);
    color: var(--color-black);
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--color-dark-quaternary);
    border-radius: 5px;
}

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

/* ===================================
   Navigation Bar
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(10, 10, 10, 0);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-normal);
    border-bottom: 1px solid rgba(255, 255, 255, 0);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    background-color: rgba(10, 10, 10, 0.98);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.7rem;
    font-weight: 700;
    font-family: var(--font-secondary);
    background: var(--color-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo a:hover {
    filter: brightness(1.2);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: var(--transition-fast);
    padding: 0.5rem 0;
}

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

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

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

/* Dropdown Menu Styles */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 1rem);
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background-color: rgba(10, 10, 10, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    min-width: 200px;
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-lg);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    border-radius: var(--radius-sm);
}

.dropdown-link:hover {
    background: var(--color-gradient);
    color: var(--color-black);
    transform: translateX(5px);
}

.dropdown .nav-link i {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.dropdown:hover .nav-link i {
    transform: rotate(180deg);
}

/* Mobile Dropdown Styles */
@media screen and (max-width: 768px) {
    .dropdown-menu {
        position: static;
        background-color: rgba(20, 20, 20, 0.5);
        opacity: 1;
        visibility: visible;
        transform: none !important;
        width: 100%;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
        box-shadow: none;
        margin-top: 0.5rem;
        left: auto;
    }

    .dropdown.active .dropdown-menu {
        max-height: 500px;
        transform: none !important;
    }

    .dropdown-link {
        justify-content: center;
        padding: 1rem;
    }

    .dropdown-link:hover {
        transform: none;
    }
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: var(--color-text-primary);
    transition: var(--transition-normal);
    border-radius: 3px;
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

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

.hamburger.active .bar:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* ===================================
   Container & Section Utilities
   =================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background-color: rgba(0, 217, 255, 0.1);
    color: var(--color-accent-cyan);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(0, 217, 255, 0.2);
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    font-family: var(--font-secondary);
    margin-bottom: var(--spacing-md);
    background: var(--color-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    font-family: var(--font-primary);
}
/* remember to change the btn-primary to btn-submit */
.btn-primary {
    background: var(--color-gradient);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

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

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

.btn-secondary:hover {
    border-color: var(--color-accent-cyan);
    color: var(--color-accent-cyan);
    box-shadow: var(--shadow-glow);
}

.btn-download {
    background-color: var(--color-dark-tertiary);
    color: var(--color-text-primary);
    margin-top: var(--spacing-md);
}

.btn-download:hover {
    background-color: var(--color-dark-quaternary);
    transform: translateY(-2px);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px;
    background: radial-gradient(ellipse at top, rgba(0, 217, 255, 0.05) 0%, transparent 50%),
                radial-gradient(ellipse at bottom, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-content {
    animation: fadeInUp 0.8s ease;
}

.hero-greeting {
    margin-bottom: var(--spacing-sm);
}

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

.hero-title {
    font-size: 4.5rem;
    font-weight: 800;
    font-family: var(--font-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

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

.hero-subtitle {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    min-height: 60px;
}

.typed-text {
    color: var(--color-accent-cyan);
}

.cursor {
    display: inline-block;
    width: 3px;
    background-color: var(--color-accent-cyan);
    animation: blink 0.7s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
}

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

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

.social-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-dark-tertiary);
    color: var(--color-text-primary);
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: 1.25rem;
    transition: var(--transition-normal);
    border: 1px solid transparent;
}

.social-link:hover {
    background-color: var(--color-dark-quaternary);
    color: var(--color-accent-cyan);
    border-color: var(--color-accent-cyan);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 0.8s ease;
}

.image-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 1;
    background: var(--color-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10rem;
    color: rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.image-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s infinite;
}

.profile-image {
    width: 220px;
    height: 220px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
}

/* .profile-image:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
} */

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator a {
    color: var(--color-text-secondary);
    font-size: 2rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.scroll-indicator a:hover {
    color: var(--color-accent-cyan);
}

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

/* ===================================
   Projects Section
   =================================== */
.projects {
    background-color: var(--color-dark-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background-color: var(--color-dark-tertiary);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(0, 217, 255, 0.3);
}

.project-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.project-image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-dark-quaternary) 0%, var(--color-dark-tertiary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: rgba(255, 255, 255, 0.1);
    transition: var(--transition-slow);
}

.project-card:hover .project-image-placeholder {
    transform: scale(1.1);
}

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

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

.project-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-accent-cyan);
    color: var(--color-black);
    border-radius: 50%;
    text-decoration: none;
    font-size: 1.25rem;
    transition: var(--transition-fast);
}

.project-link:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
}

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

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

.project-tag {
    padding: 0.25rem 0.75rem;
    background-color: rgba(0, 217, 255, 0.1);
    color: var(--color-accent-cyan);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(0, 217, 255, 0.2);
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    font-family: var(--font-secondary);
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.project-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    transition: max-height 0.3s ease, opacity 0.3s ease;
}

/* Tags Wrapper and Toggle Button */
.tags-wrapper {
    position: relative;
    margin-bottom: var(--spacing-md);
    padding-bottom: 45px;
}

.description-wrapper {
    position: relative;
    padding-bottom: 45px;
}

.project-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    max-height: 72px;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    margin-bottom: 0;
    padding-bottom: 0;
}

.project-tags.collapsed {
    max-height: 72px;
}

.project-tags.expanded {
    max-height: 1000px;
}

.project-description.collapsed {
    max-height: 4.8em;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    transition: all 0.4s ease;
    margin-bottom: 0;
}

.project-description.expanded {
    max-height: none;
    display: block;
    -webkit-line-clamp: none;
    margin-bottom: 0;
}

/* Toggle Button */
.toggle-btn {
    position: absolute;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid rgba(0, 217, 255, 0.3);
    color: var(--color-accent-cyan);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.toggle-btn:hover {
    background: rgba(0, 217, 255, 0.2);
    border-color: var(--color-accent-cyan);
    transform: translateX(-50%) scale(1.1);
}

.tags-wrapper .toggle-btn {
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
    margin: 0;
}

.description-wrapper .toggle-btn {
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
    margin: 0;
}

.toggle-btn i {
    transition: transform 0.3s ease;
}

.toggle-btn.expanded i {
    transform: rotate(180deg);
}

/* ===================================
   Resume Section
   =================================== */
.resume-content {
    max-width: 1200px;
    margin: 0 auto;
}

.resume-about {
    background-color: var(--color-dark-tertiary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-2xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.subsection-title {
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-secondary);
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.about-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.resume-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.resume-column {
    background-color: var(--color-dark-tertiary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.column-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.column-header i {
    font-size: 2rem;
    color: var(--color-accent-cyan);
}

.column-header h3 {
    font-size: 1.75rem;
    font-weight: 700;
    font-family: var(--font-secondary);
    color: var(--color-white);
}

.timeline-item {
    position: relative;
    padding-left: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-left: 2px solid var(--color-dark-quaternary);
}

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

.timeline-dot {
    position: absolute;
    left: -6px;
    top: 0;
    width: 12px;
    height: 12px;
    background-color: var(--color-accent-cyan);
    border-radius: 50%;
    box-shadow: var(--shadow-glow);
}

.timeline-content {
    padding-left: var(--spacing-md);
}

.timeline-date {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: rgba(0, 217, 255, 0.1);
    color: var(--color-accent-cyan);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(0, 217, 255, 0.2);
}

.timeline-title {
    font-size: 1.25rem;
    font-weight: 600;
    font-family: var(--font-secondary);
    margin-bottom: var(--spacing-xs);
    color: var(--color-white);
}

.timeline-institution {
    font-size: 1rem;
    color: var(--color-accent-purple);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.timeline-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Skills Section */
.skills-section {
    background-color: var(--color-dark-tertiary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

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

.skill-category {
    background-color: var(--color-dark-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.skill-category-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 600;
    font-family: var(--font-secondary);
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.skill-category-title i {
    color: var(--color-accent-cyan);
}

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

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

.skill-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.skill-bar {
    width: 100%;
    height: 8px;
    background-color: var(--color-dark-quaternary);
    border-radius: 50px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--color-gradient);
    border-radius: 50px;
    transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-glow);
    /* Start with 0 width for animation */
    width: 0;
    /* Optimize for smooth animation */
    will-change: width;
    transform: translateZ(0);
    backface-visibility: hidden;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-2xl);
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info {
    background-color: var(--color-dark-tertiary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    height: fit-content;
}

.contact-info-title {
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-secondary);
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.contact-info-text {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.contact-detail-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 1.5rem;
    color: var(--color-accent-cyan);
    background-color: rgba(0, 217, 255, 0.1);
    border: 1px solid rgba(0, 217, 255, 0.2);
    flex-shrink: 0;
}
.btn-d {
    width: 50px;
    height: 50px;
    display: inline-flex; 
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    color: var(--color-accent-cyan);
    background-color: rgba(0, 217, 255, 0.1);
    border: 1px solid rgba(0, 217, 255, 0.2);
    flex-shrink: 0;
    vertical-align: middle; 
    gap: 0.5em; 
    transition: var(--transition-normal); 
    cursor: pointer;
}



.contact-detail-text h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--color-white);
}

.contact-detail-text p,
.contact-detail-text a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.contact-detail-text a:hover {
    color: var(--color-accent-cyan);
}

.contact-social h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.contact-form-wrapper {
    background-color: var(--color-dark-tertiary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

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

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

.form-group label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    background-color: var(--color-dark-secondary);
    border: 1px solid var(--color-dark-quaternary);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
    width: 100%;
    box-sizing: border-box;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-cyan);
    box-shadow: var(--shadow-glow);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

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

.form-message {
    padding: 1rem;
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
    display: block;
}

.form-message.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
    display: block;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--color-dark-primary);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.footer-text i {
    color: #ef4444;
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* ===================================
   Back to Top Button
   =================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--color-gradient);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

/* ===================================
   Enhanced Scroll Performance
   =================================== */

/* Optimize animations for high refresh rate displays */
@media (prefers-reduced-motion: no-preference) {
    * {
        will-change: auto;
    }
    
    .hero-content,
    .hero-image,
    .project-card,
    .timeline-item,
    .skill-item {
        will-change: transform, opacity;
    }
}

/* Hardware acceleration for smooth animations */
.hero-content,
.hero-image,
.project-card,
.timeline-item,
.skill-item,
.navbar {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Optimize scroll performance */
section {
    contain: layout style paint;
}

.project-card,
.timeline-item,
.skill-item {
    contain: layout style;
}

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

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

/* ===================================
   Responsive Design
   =================================== */
@media screen and (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .image-wrapper {
        max-width: 350px;
    }
    
    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .resume-grid {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    /* Optimize for mobile - reduce animations and expensive effects */
    * {
        will-change: auto !important;
    }
    
    /* Disable parallax on mobile */
    .hero-image {
        transform: none !important;
    }
    
    /* Optimize navbar for mobile */
    .navbar {
        -webkit-backdrop-filter: blur(5px);
        backdrop-filter: blur(5px);
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(10, 10, 10, 0.98);
        width: 100%;
        text-align: center;
        transition: transform 0.3s ease;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        padding: 1rem 0;
        width: 100%;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* Disable hover effects on mobile for better performance */
    .project-card:hover,
    .btn:hover,
    .social-link:hover {
        transform: none !important;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    section {
        padding: var(--spacing-2xl) 0;
    }
    
    .container {
        padding: 0 1.5rem;
    }
    
    /* Optimize animations - reduce duration */
    .project-card,
    .timeline-item,
    .skill-item,
    .contact-detail-item {
        transition: opacity 0.3s ease !important;
        transform: none !important;
    }
    
    /* Optimize skill bars on mobile - faster animation */
    .skill-progress {
        transition: width 0.6s ease !important;
    }
    
    /* Contact Section Mobile Fixes */
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .contact-info {
        padding: var(--spacing-lg);
    }
    
    .contact-info-title {
        font-size: 1.5rem;
    }
    
    .contact-detail-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .contact-icon {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .contact-form-wrapper {
        padding: var(--spacing-lg);
    }
    
    .form-group input,
    .form-group textarea {
        padding: 0.875rem;
        font-size: 0.95rem;
    }
    
    .form-group textarea {
        min-height: 120px;
    }
}

@media screen and (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .nav-container {
        padding: 1rem 1.5rem;
    }
    
    .image-wrapper {
        max-width: 280px;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
    
    /* Contact Section Small Mobile Fixes */
    .contact-info {
        padding: var(--spacing-md);
    }
    
    .contact-info-title {
        font-size: 1.25rem;
    }
    
    .contact-info-text {
        font-size: 0.9rem;
        line-height: 1.6;
    }
    
    .contact-detail-text h4 {
        font-size: 0.9rem;
    }
    
    .contact-detail-text p,
    .contact-detail-text a {
        font-size: 0.85rem;
    }
    
    .contact-form-wrapper {
        padding: var(--spacing-md);
    }
    
    .form-group input,
    .form-group textarea {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
    
    .form-group textarea {
        min-height: 100px;
    }
    
    .form-group label {
        font-size: 0.9rem;
    }
    
    .btn-submit {
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }
}