/* ================================
   CSS RESET AND BASE STYLES
   ================================ */

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

html {
    scroll-behavior: smooth;
    /* Prevent horizontal scroll on mobile */
    overflow-x: hidden;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    /* Prevent horizontal scroll */
    overflow-x: hidden;
    /* Improve text rendering on mobile */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Prevent text size adjust on mobile orientation change */
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

/* ================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ================================ */

:root {
    /* Light mode colors - Blue Theme */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #0ea5e9;
    --accent-color: #06b6d4;
    --success-color: #059669;
    --warning-color: #d97706;
    --error-color: #dc2626;
    
    --bg-color: #ffffff;
    --surface-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --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: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark mode colors - Blue Theme */
[data-theme="dark"] {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #14b8a6;
    --accent-color: #0ea5e9;
    
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --card-bg: #1e293b;
    --text-color: #f1f5f9;
    --text-muted: #94a3b8;
    --text-light: #64748b;
    --border-color: #334155;
    --shadow-color: rgba(0, 0, 0, 0.4);
}

/* ================================
   UTILITY CLASSES
   ================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-12);
    color: var(--text-color);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-2);
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-full);
}

.btn {
    display: inline-block;
    padding: var(--spacing-3) var(--spacing-6);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: var(--font-size-base);
    text-align: center;
}

.btn-primary {
    background: rgba(6, 182, 212, 0.2);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(6, 182, 212, 0.4);
    color: var(--accent-color);
    box-shadow: 0 8px 32px rgba(6, 182, 212, 0.1);
}

.btn-primary:hover {
    background: rgba(6, 182, 212, 0.3);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid rgba(6, 182, 212, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(6, 182, 212, 0.2);
}

.btn-secondary {
    background: rgba(6, 182, 212, 0.2);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(6, 182, 212, 0.4);
    color: var(--accent-color);
    box-shadow: 0 8px 32px rgba(6, 182, 212, 0.1);
}

.btn-secondary:hover {
    background: rgba(6, 182, 212, 0.3);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid rgba(6, 182, 212, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(6, 182, 212, 0.2);
}

/* ================================
   NAVIGATION STYLES
   ================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

[data-theme="dark"] .navbar {
    background-color: rgba(15, 23, 42, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-brand a {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-8);
}

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

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

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

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--surface-color);
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-2);
    min-height: 44px;
    min-width: 44px;
    justify-content: center;
    align-items: center;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    transition: all var(--transition-fast);
    border-radius: 2px;
}

/* ================================
   HERO SECTION STYLES
   ================================ */

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-color) 0%, var(--surface-color) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="%236366f1" stop-opacity="0.1"/><stop offset="100%" stop-color="%236366f1" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="400" cy="700" r="120" fill="url(%23a)"/></svg>') center/cover;
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
    text-align: center;
    position: relative;
    z-index: 1;
}

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

.greeting-text {
    margin-bottom: var(--spacing-4);
}

.greeting-hello {
    font-size: var(--font-size-xl);
    color: var(--text-muted);
    font-weight: 400;
    opacity: 0;
    animation: fadeInUp 1s ease forwards 0.5s;
}

.hero-name {
    font-size: clamp(var(--font-size-4xl), 8vw, var(--font-size-5xl));
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: var(--spacing-4);
    opacity: 0;
    animation: fadeInUp 1s ease forwards 0.8s;
}

.hero-tagline {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-1);
    opacity: 0;
    animation: fadeInUp 1s ease forwards 1.1s;
}

.hero-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-style: italic;
    font-weight: 300;
    margin-bottom: var(--spacing-6);
    opacity: 0;
    animation: fadeInUp 1s ease forwards 1.3s;
}

.hero-bio {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    margin-bottom: var(--spacing-3);
    line-height: 1.7;
    opacity: 0;
    animation: fadeInUp 1s ease forwards 1.5s;
}

.hero-humor {
    font-size: var(--font-size-base);
    color: var(--text-muted);
    font-style: italic;
    font-weight: 300;
    margin-bottom: var(--spacing-6);
    opacity: 0;
    animation: fadeInUp 1s ease forwards 1.7s;
}

.hero-joke {
    font-size: var(--font-size-base);
    color: var(--text-light);
    margin-bottom: var(--spacing-6);
    font-style: italic;
    opacity: 0;
    animation: fadeInUp 1s ease forwards 1.6s;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 1s ease forwards 1.7s;
}

.scroll-indicator {
    position: fixed;
    top: calc(70px + var(--spacing-2));
    right: var(--spacing-2);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--text-color);
    font-size: var(--font-size-xs);
    font-weight: 500;
    z-index: 100;
    /* Clean glassmorphism styling */
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: var(--spacing-3);
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
    min-width: 44px;
    justify-content: center;
}

/* Dark theme styling */
[data-theme="dark"] .scroll-indicator {
    background: rgba(15, 23, 42, 0.15);
    border: 1px solid rgba(148, 163, 184, 0.15);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* Clean hover effects */
.scroll-indicator:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .scroll-indicator:hover {
    background: rgba(15, 23, 42, 0.2);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Touch feedback for mobile */
@media (hover: none) and (pointer: coarse) {
    .scroll-indicator:active {
        transform: scale(0.98);
        background: rgba(255, 255, 255, 0.2);
    }
    
    [data-theme="dark"] .scroll-indicator:active {
        background: rgba(15, 23, 42, 0.25);
    }
}

.scroll-mouse {
    width: 14px;
    height: 22px;
    border: 1.5px solid currentColor;
    border-radius: 7px;
    position: relative;
    opacity: 0.8;
    margin-bottom: 2px;
}

.scroll-wheel {
    width: 2px;
    height: 4px;
    background-color: currentColor;
    border-radius: 1px;
    position: absolute;
    top: 3px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollDownAnimation 1.8s infinite;
    opacity: 1;
}

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

@keyframes scrollWheel {
    0% {
        opacity: 0;
        top: 3px;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        top: 11px;
    }
}

@keyframes scrollWheelSmall {
    0% {
        opacity: 0;
        top: 1.5px;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        top: 5.5px;
    }
}

@keyframes scrollWheelMedium {
    0% {
        opacity: 0;
        top: 2.25px;
    }
    50% {
        opacity: 0.8;
    }
    100% {
        opacity: 0;
        top: 8.25px;
    }
}

@keyframes scrollWheelLarge {
    0% {
        opacity: 0;
        top: 4.5px;
    }
    50% {
        opacity: 0.8;
    }
    100% {
        opacity: 0;
        top: 16.5px;
    }
}

@keyframes scrollDownAnimation {
    0% {
        opacity: 0;
        top: 3px;
    }
    20% {
        opacity: 1;
    }
    80% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        top: 12px;
    }
}

/* Hide scroll indicator on mobile to avoid clutter */
@media (max-width: 768px) {
    .scroll-indicator {
        display: none;
    }
}

/* ================================
   ABOUT SECTION STYLES
   ================================ */

.about-section {
    padding: var(--spacing-20) 0;
    background-color: var(--surface-color);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-12);
    align-items: center;
}

.about-image {
    display: flex;
    justify-content: center;
}

.profile-circle {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--primary-color);
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-normal);
}

.profile-circle:hover {
    transform: scale(1.05);
}

.profile-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: 50%;
}

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

.about-description {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    margin-bottom: var(--spacing-8);
    line-height: 1.7;
}

.about-humor {
    font-size: 0.9rem;
    font-style: italic;
    color: var(--text-muted);
    opacity: 0.8;
    margin-bottom: var(--spacing-8);
    text-align: center;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    background-color: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

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

.highlight-item i {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    width: 24px;
}

.highlight-item span {
    font-weight: 500;
    color: var(--text-color);
}

/* ================================
   SKILLS SECTION STYLES
   ================================ */

.skills-section {
    padding: var(--spacing-20) 0;
    background-color: var(--bg-color);
}

.skills-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-12);
}

.skills-category {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.category-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-6);
}

.category-title i {
    color: var(--primary-color);
    font-size: var(--font-size-2xl);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
}

.skill-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    background-color: var(--surface-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.skill-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.skill-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}

.skill-info {
    flex: 1;
}

.skill-info h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-2);
}

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

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 1.5s ease-in-out;
}

.skill-progress[data-skill="90"] { width: 90%; }
.skill-progress[data-skill="85"] { width: 85%; }
.skill-progress[data-skill="80"] { width: 80%; }
.skill-progress[data-skill="88"] { width: 88%; }
.skill-progress[data-skill="92"] { width: 92%; }
.skill-progress[data-skill="87"] { width: 87%; }
.skill-progress[data-skill="83"] { width: 83%; }
.skill-progress[data-skill="89"] { width: 89%; }
.skill-progress[data-skill="95"] { width: 95%; }
.skill-progress[data-skill="91"] { width: 91%; }
.skill-progress[data-skill="86"] { width: 86%; }

.tools-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
}

.tool-tag {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-normal);
}

.tool-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ================================
   EXPERIENCE SECTION STYLES
   ================================ */

.experience-section {
    padding: var(--spacing-20) 0;
    background-color: var(--bg-color);
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-6);
}

.experience-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    cursor: pointer;
    position: relative;
}

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

.experience-card:active {
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.company-icon {
    background-color: var(--primary-color);
    color: white;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.job-info {
    flex: 1;
}

.job-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-1);
}

.company-name {
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-1);
}

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

.job-responsibilities {
    list-style: none;
    padding-left: 0;
}

.job-responsibilities li {
    position: relative;
    color: var(--text-muted);
    margin-bottom: var(--spacing-2);
    padding-left: var(--spacing-5);
}

.job-responsibilities li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* ================================
   TEST SCORES SECTION STYLES
   ================================ */

.scores-section {
    padding: var(--spacing-20) 0;
    background-color: var(--surface-color);
}

.scores-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-6);
}

.score-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-8);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.score-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.score-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    margin: 0 auto var(--spacing-4);
}

.test-name {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-2);
}

.test-score {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
}

/* ================================
   PROJECTS SECTION STYLES
   ================================ */

.projects-section {
    padding: var(--spacing-20) 0;
    background-color: var(--bg-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
}

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

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    position: relative;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(99, 102, 241, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-normal);
}

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

.project-links {
    display: flex;
    gap: var(--spacing-4);
}

.project-link {
    background-color: white;
    color: var(--primary-color);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
}

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

.project-content {
    padding: var(--spacing-6);
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-3);
}

.project-description {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-4);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.tech-tag {
    background-color: var(--surface-color);
    color: var(--primary-color);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ================================
   ACTIVITIES SECTION STYLES
   ================================ */

.activities-section {
    padding: var(--spacing-20) 0;
    background-color: var(--bg-color);
}

.activities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
}

.activity-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.activity-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

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

.activity-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-4);
}

.activity-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-3);
}

.activity-summary {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-4);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.activity-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-3);
}

.activity-year {
    background-color: var(--surface-color);
    color: var(--text-color);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.activity-category {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ================================
   MODAL STYLES
   ================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    padding: var(--spacing-4);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    position: relative;
    transform: scale(0.7) translateY(100px);
    transition: all var(--transition-normal);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--spacing-4);
    right: var(--spacing-4);
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: var(--font-size-xl);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 10;
}

.modal-close:hover {
    background-color: var(--surface-color);
    color: var(--text-color);
}

.modal-header {
    padding: var(--spacing-8) var(--spacing-6) var(--spacing-6);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.modal-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
    margin: 0 auto var(--spacing-4);
}

.modal-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: var(--spacing-3);
}

.modal-meta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
}

.modal-year {
    background-color: var(--surface-color);
    color: var(--text-color);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.modal-category {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.modal-body {
    padding: var(--spacing-6);
}

.modal-body > div {
    margin-bottom: var(--spacing-6);
}

.modal-body h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-3);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.modal-body h3::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-full);
}

.modal-description p {
    color: var(--text-muted);
    line-height: 1.7;
}

.modal-achievements ul {
    list-style: none;
    padding: 0;
}

.modal-achievements li {
    color: var(--text-muted);
    margin-bottom: var(--spacing-2);
    padding-left: var(--spacing-6);
    position: relative;
}

.modal-achievements li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
    font-size: var(--font-size-lg);
}

.modal-skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.skill-tag {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ================================
   CONTACT SECTION STYLES
   ================================ */

.contact-section {
    padding: var(--spacing-20) 0;
    background-color: var(--surface-color);
}

.contact-content {
    display: flex;
    justify-content: center;
    align-items: center;
}

.contact-info {
    text-align: center;
    max-width: 500px;
}

.contact-info h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-4);
}

.contact-info p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

.contact-details {
    margin-bottom: var(--spacing-8);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.contact-item i {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    width: 24px;
}

.contact-item span {
    color: var(--text-color);
    font-weight: 500;
}

.social-links {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
}

.social-link {
    background-color: var(--card-bg);
    color: var(--text-muted);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: var(--font-size-lg);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.social-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}



/* ================================
   FOOTER STYLES
   ================================ */

.footer {
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-8) 0;
}

.footer-content {
    text-align: center;
    color: var(--text-muted);
}

.footer-content p {
    margin-bottom: var(--spacing-2);
}

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

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

@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
}

@media (max-width: 768px) {
    /* Navigation - Enhanced Mobile Menu */
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: var(--spacing-6) var(--spacing-4);
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-xl);
        z-index: 999;
        gap: var(--spacing-2);
    }
    
    [data-theme="dark"] .nav-menu {
        background-color: rgba(15, 23, 42, 0.98);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
        text-align: center;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-4);
        margin: var(--spacing-1) 0;
        border-radius: var(--radius-lg);
        min-height: 44px;
        line-height: 1.2;
        transition: all 0.3s ease;
        font-size: var(--font-size-lg);
        font-weight: 500;
    }
    
    .nav-link:hover,
    .nav-link:focus {
        background-color: rgba(37, 99, 235, 0.1);
        transform: translateY(-1px);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    /* Hero section - Enhanced Mobile */
    .hero-content {
        text-align: center;
        padding: var(--spacing-8) 0;
    }
    
    .hero-name {
        font-size: clamp(2rem, 8vw, 3rem);
        line-height: 1.2;
        margin-bottom: var(--spacing-4);
    }
    
    .hero-tagline {
        font-size: clamp(1rem, 4vw, 1.25rem);
        margin-bottom: var(--spacing-1);
        line-height: 1.4;
    }
    
    .hero-subtitle {
        font-size: clamp(0.75rem, 2.5vw, 0.85rem);
        margin-bottom: var(--spacing-4);
        line-height: 1.5;
    }
    
    .hero-bio {
        font-size: var(--font-size-base);
        margin: var(--spacing-4) 0 var(--spacing-2);
        line-height: 1.6;
    }
    
    .hero-humor {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-4);
        line-height: 1.5;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-4);
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        min-height: 48px;
        padding: var(--spacing-4) var(--spacing-6);
        font-size: var(--font-size-base);
        border-radius: var(--radius-lg);
    }
    
    /* Skills section */
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .skill-item {
        padding: var(--spacing-3);
    }
    
    .skill-icon {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-lg);
    }
    
    /* Experience grid */
    .experience-grid {
        grid-template-columns: 1fr;
    }
    
    /* Projects grid */
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    /* Activities section */
    .activities-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .activity-card {
        padding: var(--spacing-5);
    }
    
    .activity-icon {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-xl);
    }
    
    /* About Section - Mobile */
    .about-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-6);
    }
    
    .profile-circle {
        width: 200px;
        height: 200px;
        margin: 0 auto;
    }
    
    .profile-circle img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    
    .about-description {
        font-size: var(--font-size-base);
        line-height: 1.7;
        text-align: left;
        margin: 0 auto;
        max-width: 600px;
    }
    
    /* Experience Cards - Mobile */
    .experience-card {
        padding: var(--spacing-4);
        margin-bottom: var(--spacing-4);
    }
    
    .card-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-3);
    }
    
    .company-icon {
        align-self: center;
        width: 50px;
        height: 50px;
    }
    
    .job-title {
        font-size: var(--font-size-lg);
        margin-bottom: var(--spacing-1);
    }
    
    .company-name {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-1);
    }
    
    .job-responsibilities li {
        font-size: var(--font-size-sm);
        line-height: 1.6;
        margin-bottom: var(--spacing-2);
    }
    
    /* Activity Cards - Mobile */
    .activity-card {
        padding: var(--spacing-4);
        margin-bottom: var(--spacing-4);
    }
    
    .activity-title {
        font-size: var(--font-size-lg);
        line-height: 1.3;
    }
    
    .activity-summary {
        font-size: var(--font-size-sm);
        line-height: 1.5;
    }
    
    /* Project Cards - Mobile */
    .project-card {
        padding: var(--spacing-4);
        margin-bottom: var(--spacing-4);
    }
    
    /* Contact Section - Mobile */
    .contact-content {
        justify-content: center;
        text-align: center;
    }
    
    .contact-info {
        max-width: 100%;
        padding: 0 var(--spacing-4);
    }
    
    /* Modal responsive - Enhanced */
    .modal-content {
        max-width: 95vw;
        max-height: 85vh;
        margin: var(--spacing-2);
        padding: var(--spacing-4);
        border-radius: var(--radius-lg);
    }
    
    .modal-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-3);
        padding-bottom: var(--spacing-4);
        border-bottom: 1px solid var(--border-color);
        margin-bottom: var(--spacing-4);
    }
    
    .modal-icon {
        width: 60px;
        height: 60px;
        font-size: var(--font-size-2xl);
        align-self: center;
    }
    
    .modal-close {
        position: absolute;
        top: var(--spacing-3);
        right: var(--spacing-3);
        min-height: 44px;
        min-width: 44px;
        border-radius: var(--radius-full);
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(0, 0, 0, 0.1);
        backdrop-filter: blur(10px);
    }
    
    .modal-body {
        padding: 0;
        font-size: var(--font-size-sm);
        line-height: 1.6;
    }
    
    .modal-achievements li {
        margin-bottom: var(--spacing-2);
        font-size: var(--font-size-sm);
    }
    
    .skill-tag {
        font-size: var(--font-size-xs);
        padding: var(--spacing-1) var(--spacing-2);
        margin: var(--spacing-1);
    }
    
    /* Typography - Mobile */
    .section-title {
        font-size: clamp(1.5rem, 6vw, 2rem);
        margin-bottom: var(--spacing-6);
    }
    
    /* Footer - Mobile */
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-4);
    }
    
    .social-links {
        justify-content: center;
        gap: var(--spacing-6);
    }
    
    .social-links a {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Scroll Indicator - Mobile */
    .scroll-indicator {
        right: var(--spacing-3);
        bottom: var(--spacing-6);
        /* Compact mobile sizing */
        min-height: 50px;
        min-width: 50px;
        padding: var(--spacing-2);
        gap: var(--spacing-1);
        font-size: calc(var(--font-size-xs) * 0.9);
    }
    
    .scroll-mouse {
        width: 12px;
        height: 18px;
        border: 1px solid currentColor;
        border-radius: 6px;
    }
    
    .scroll-wheel {
        width: 1.5px;
        height: 3px;
        top: 2px;
    }
    
    @keyframes scrollDownAnimation {
        0% {
            opacity: 0;
            top: 2px;
        }
        20% {
            opacity: 1;
        }
        80% {
            opacity: 1;
        }
        100% {
            opacity: 0;
            top: 10px;
        }
    }
    
    /* Scores grid */
    .scores-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

/* ================================
   EXTRA SMALL MOBILE (< 480px)
   ================================ */

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-3);
    }
    
    .nav-container {
        padding: 0 var(--spacing-3);
        height: 60px;
    }
    
    .nav-menu {
        top: 60px;
        padding: var(--spacing-3);
    }
    
    .nav-brand a {
        font-size: var(--font-size-lg);
    }
    
    .profile-circle {
        width: 150px;
        height: 150px;
    }
    
    .hero-name {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }
    
    .hero-tagline {
        font-size: clamp(0.875rem, 4vw, 1.125rem);
    }
    
    .section-title {
        font-size: clamp(1.25rem, 6vw, 1.75rem);
    }
    
    .modal-content {
        max-width: 98vw;
        margin: var(--spacing-1);
        padding: var(--spacing-3);
    }
    
    .btn {
        padding: var(--spacing-3) var(--spacing-4);
        font-size: var(--font-size-sm);
        min-height: 44px;
    }
    
    /* Card adjustments for very small screens */
    .experience-card,
    .activity-card,
    .project-card,
    .skill-card,
    .score-card {
        padding: var(--spacing-3);
        margin-bottom: var(--spacing-3);
    }
    
    /* Ensure touch targets are adequate */
    .theme-toggle,
    .mobile-menu-toggle,
    .modal-close {
        min-height: 44px;
        min-width: 44px;
    }
}

/* ================================
   TOUCH AND MOBILE OPTIMIZATIONS
   ================================ */

/* Improve touch scrolling on iOS */
* {
    -webkit-overflow-scrolling: touch;
}

/* Prevent text selection on mobile for interactive elements */
.btn,
.mobile-menu-toggle,
.theme-toggle,
.experience-card,
.activity-card,
.project-card {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    /* Prevent tap highlighting on touch devices */
    -webkit-tap-highlight-color: transparent;
}

/* Improve button appearance on touch devices */
.btn,
.mobile-menu-toggle,
.theme-toggle {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    /* Improve touch responsiveness */
    touch-action: manipulation;
}

/* Add hover/active states for touch devices */
@media (hover: none) and (pointer: coarse) {
    .btn:active {
        transform: scale(0.98);
    }
    
    .experience-card:active,
    .activity-card:active,
    .project-card:active {
        transform: scale(0.98);
    }
}

/* ================================
   ACCESSIBILITY IMPROVEMENTS
   ================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    }
}

/* Print styles */
@media print {
    .navbar,
    .theme-toggle,
    .mobile-menu-toggle,
    .scroll-indicator {
        display: none;
    }
    
    .hero-section {
        min-height: auto;
        padding: var(--spacing-8) 0;
    }
    
    * {
        box-shadow: none !important;
    }
}