/**
 * Yahya Nahnul Saputra Portfolio
 * Main Stylesheet - Playful Cyan Theme
 * ============================================
 */

/* ============================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ============================================ */
:root {
    /* Cyan Color Palette */
    --primary-50: #ecfeff;
    --primary-100: #cffafe;
    --primary-200: #a5f3fc;
    --primary-300: #67e8f9;
    --primary-400: #22d3ee;
    --primary-500: #06b6d4;
    --primary-600: #0891b2;
    --primary-700: #0e7490;
    --primary-800: #155e75;
    --primary-900: #164e63;
    
    /* Accent Colors */
    --accent-pink: #f472b6;
    --accent-purple: #a78bfa;
    --accent-yellow: #fbbf24;
    --accent-green: #34d399;
    --accent-orange: #fb923c;
    
    /* Light Theme */
    --bg-primary: #f0fdfa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #ecfeff;
    --bg-card: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.7);
    
    --text-primary: #134e4a;
    --text-secondary: #0f766e;
    --text-muted: #5eead4;
    --text-inverse: #ffffff;
    
    --border-color: rgba(6, 182, 212, 0.2);
    --shadow-color: rgba(6, 182, 212, 0.15);
    
    /* Typography */
    --font-display: 'Space Grotesk', 'Poppins', sans-serif;
    --font-body: 'Plus Jakarta Sans', 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-tooltip: 500;
}

/* Dark Theme - Modern Dark */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-glass: rgba(30, 41, 59, 0.85);
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --text-inverse: #0f172a;
    
    --border-color: rgba(148, 163, 184, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.4);
    
    /* Keep primary cyan for accents */
    --primary-50: #ecfeff;
    --primary-100: #cffafe;
    --primary-200: #a5f3fc;
    --primary-300: #67e8f9;
    --primary-400: #22d3ee;
    --primary-500: #06b6d4;
}

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

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

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

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

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-400), var(--primary-600));
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--primary-300), var(--primary-500));
}

/* Selection */
::selection {
    background: var(--primary-400);
    color: var(--text-inverse);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

a {
    color: var(--primary-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-400);
}

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.animated-bg::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: 
        radial-gradient(circle at 20% 80%, var(--primary-200) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--accent-purple) 0%, transparent 40%),
        radial-gradient(circle at 40% 40%, var(--accent-pink) 0%, transparent 40%);
    opacity: 0.3;
    animation: bgFloat 20s ease-in-out infinite;
}

[data-theme="dark"] .animated-bg::before {
    opacity: 0.15;
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(2%, 2%) rotate(1deg); }
    50% { transform: translate(-1%, 3%) rotate(-1deg); }
    75% { transform: translate(3%, -2%) rotate(2deg); }
}

/* Floating Shapes */
.floating-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.5;
    animation: float 15s ease-in-out infinite;
}

.shape-1 {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-300), var(--primary-500));
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
    top: 60%;
    right: 15%;
    animation-delay: -5s;
    animation-duration: 18s;
}

.shape-3 {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--accent-yellow), var(--accent-orange));
    bottom: 20%;
    left: 20%;
    animation-delay: -10s;
    animation-duration: 20s;
}

.shape-4 {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-green), var(--primary-400));
    top: 30%;
    right: 30%;
    animation-delay: -7s;
    animation-duration: 12s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
    25% { transform: translate(30px, -30px) rotate(90deg) scale(1.1); }
    50% { transform: translate(-20px, 20px) rotate(180deg) scale(0.9); }
    75% { transform: translate(20px, 40px) rotate(270deg) scale(1.05); }
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

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

/* Glass Card Effect */
.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px var(--shadow-color);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 48px var(--shadow-color);
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    padding: var(--space-md) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 20px var(--shadow-color);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-logo .logo-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 800;
    font-size: 1.25rem;
    animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.05) rotate(3deg); }
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    list-style: none;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-400), var(--accent-pink));
    border-radius: var(--radius-full);
    transition: all var(--transition-bounce);
    transform: translateX(-50%);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-500);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 80%;
}

/* Theme Toggle */
.theme-toggle {
    position: relative;
    width: 60px;
    height: 32px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    overflow: hidden;
}

.theme-toggle::before {
    content: '☀️';
    position: absolute;
    left: 4px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.9rem;
    transition: opacity var(--transition-fast);
}

.theme-toggle::after {
    content: '🌙';
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.9rem;
    transition: opacity var(--transition-fast);
}

.theme-toggle .toggle-ball {
    position: absolute;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform var(--transition-bounce);
    box-shadow: 0 2px 10px var(--shadow-color);
}

[data-theme="dark"] .theme-toggle .toggle-ball {
    transform: translateX(28px);
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

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

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

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-text {
    animation: slideInLeft 1s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-greeting {
    display: inline-block;
    font-size: 1.125rem;
    color: var(--primary-500);
    font-weight: 600;
    margin-bottom: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--primary-100);
    border-radius: var(--radius-full);
    animation: bounceIn 0.8s ease-out 0.3s both;
}

[data-theme="dark"] .hero-greeting {
    background: var(--bg-card);
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: var(--space-md);
    line-height: 1.1;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary-400), var(--accent-purple), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 5s ease-in-out infinite;
    background-size: 200% 200%;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Animated Photo */
.hero-image {
    position: relative;
    animation: slideInRight 1s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-photo-wrapper {
    position: relative;
    width: 400px;
    height: 450px;
    margin: 0 auto;
}

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

.hero-photo-wrapper::before {
    content: '';
    position: absolute;
    top: -10px;
    right: -10px;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-400), var(--accent-pink));
    border-radius: var(--radius-xl);
    z-index: 1;
    animation: photoFloat 6s ease-in-out infinite;
}

.hero-photo-wrapper::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: -10px;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--accent-purple), var(--primary-500));
    border-radius: var(--radius-xl);
    z-index: 0;
    animation: photoFloat 6s ease-in-out infinite reverse;
}

@keyframes photoFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(10px, -10px) rotate(2deg); }
}

/* Floating Badges around photo */
.floating-badge {
    position: absolute;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    box-shadow: 0 8px 30px var(--shadow-color);
    z-index: 10;
    animation: badgeFloat 4s ease-in-out infinite;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 0.875rem;
}

.floating-badge i {
    color: var(--primary-500);
}

.badge-1 {
    top: 20px;
    left: -30px;
    animation-delay: 0s;
}

.badge-2 {
    top: 50%;
    right: -40px;
    animation-delay: -1s;
}

.badge-3 {
    bottom: 30px;
    left: -20px;
    animation-delay: -2s;
}

@keyframes badgeFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
    color: white;
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 30px rgba(6, 182, 212, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-500);
    border: 2px solid var(--primary-500);
}

.btn-secondary:hover {
    background: var(--primary-500);
    color: white;
    transform: translateY(-3px);
}

.btn-glass {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-glass:hover {
    background: var(--primary-100);
    transform: translateY(-3px);
}

[data-theme="dark"] .btn-glass:hover {
    background: var(--bg-card);
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-badge {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
    color: var(--primary-700);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-md);
}

[data-theme="dark"] .section-badge {
    background: linear-gradient(135deg, var(--bg-card), var(--primary-800));
    color: var(--primary-300);
}

.section-title {
    margin-bottom: var(--space-md);
}

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

/* ============================================
   PORTFOLIO GRID
   ============================================ */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-xl);
}

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

.portfolio-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-400), var(--accent-purple), var(--accent-pink));
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.portfolio-card:hover::before {
    transform: scaleX(1);
}

.portfolio-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px var(--shadow-color);
}

.portfolio-thumbnail {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.portfolio-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.portfolio-card:hover .portfolio-thumbnail img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
    display: flex;
    align-items: flex-end;
    padding: var(--space-lg);
}

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

.portfolio-overlay .btn {
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.portfolio-card:hover .portfolio-overlay .btn {
    transform: translateY(0);
}

.portfolio-content {
    padding: var(--space-lg);
}

.portfolio-year {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background: var(--primary-100);
    color: var(--primary-700);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

[data-theme="dark"] .portfolio-year {
    background: var(--primary-800);
    color: var(--primary-300);
}

.portfolio-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.portfolio-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.portfolio-tag {
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

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

.skill-category-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.skill-category-title i {
    color: var(--primary-500);
}

.skill-item {
    margin-bottom: var(--space-lg);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.skill-name {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 500;
}

.skill-name i {
    color: var(--primary-500);
    width: 20px;
}

.skill-percentage {
    font-weight: 600;
    color: var(--primary-500);
}

.skill-bar {
    height: 10px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-400), var(--primary-600));
    border-radius: var(--radius-full);
    position: relative;
    width: 0;
    transition: width 1.5s ease-out;
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ============================================
   EXPERIENCE TIMELINE
   ============================================ */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary-400), var(--accent-purple), var(--accent-pink));
    border-radius: var(--radius-full);
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 50%;
    position: relative;
    margin-bottom: var(--space-2xl);
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 50%;
}

.timeline-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    width: calc(100% - 40px);
    border: 1px solid var(--border-color);
    position: relative;
    transition: all var(--transition-base);
}

.timeline-content:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 40px var(--shadow-color);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 40px;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 40px;
}

.timeline-dot {
    position: absolute;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    border-radius: 50%;
    top: 20px;
    border: 4px solid var(--bg-primary);
    z-index: 1;
}

.timeline-item:nth-child(odd) .timeline-dot {
    right: calc(50% - 10px);
}

.timeline-item:nth-child(even) .timeline-dot {
    left: calc(50% - 10px);
}

.timeline-date {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background: var(--primary-100);
    color: var(--primary-700);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

[data-theme="dark"] .timeline-date {
    background: var(--primary-800);
    color: var(--primary-300);
}

.timeline-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
}

.timeline-org {
    color: var(--primary-500);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.timeline-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-3xl);
}

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

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

.contact-item:hover {
    transform: translateX(10px);
    border-color: var(--primary-400);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.contact-item p {
    color: var(--text-secondary);
    margin: 0;
}

.contact-item a {
    color: var(--primary-500);
}

.contact-form {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-400);
    box-shadow: 0 0 0 4px rgba(6, 182, 212, 0.1);
}

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

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    text-decoration: none;
}

.footer-logo .logo-text {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 35px;
    height: 35px;
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    color: white;
    border-radius: var(--radius-sm);
    margin-right: var(--space-xs);
}

.footer-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.footer-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
}

.footer-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--primary-500);
}

.footer-contact ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-contact li i {
    color: var(--primary-500);
    margin-top: 3px;
    width: 16px;
}

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

.footer-contact a:hover {
    color: var(--primary-500);
}

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

.social-link {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: linear-gradient(135deg, var(--primary-400), var(--primary-600));
    color: white;
    transform: translateY(-3px);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ============================================
   BLOG CARDS
   ============================================ */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-xl);
}

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

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

.blog-thumbnail {
    height: 200px;
    overflow: hidden;
}

.blog-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-card:hover .blog-thumbnail img {
    transform: scale(1.05);
}

.blog-content {
    padding: var(--space-lg);
}

.blog-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.blog-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.blog-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--primary-500);
    font-weight: 500;
}

.blog-link i {
    transition: transform var(--transition-fast);
}

.blog-link:hover i {
    transform: translateX(5px);
}

/* ============================================
   ACHIEVEMENTS SECTION
   ============================================ */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.achievement-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.achievement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-yellow), var(--accent-orange));
}

.achievement-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px var(--shadow-color);
}

.achievement-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--accent-yellow), var(--accent-orange));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    font-size: 1.75rem;
    animation: trophyBounce 2s ease-in-out infinite;
}

@keyframes trophyBounce {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.1) rotate(5deg); }
}

.achievement-title {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
}

.achievement-org {
    color: var(--primary-500);
    font-size: 0.875rem;
    margin-bottom: var(--space-xs);
}

.achievement-year {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ============================================
   LOADING & ANIMATIONS
   ============================================ */
.page-loader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.page-loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-500);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Scroll animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s ease-out;
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s ease-out;
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger delay for grid items */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-gradient {
    background: linear-gradient(135deg, var(--primary-400), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-sm); }
.gap-2 { gap: var(--space-md); }
.gap-3 { gap: var(--space-lg); }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1200px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .hero-subtitle {
        margin: 0 auto var(--space-xl);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-photo-wrapper {
        width: 300px;
        height: 350px;
    }
}

@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--bg-glass);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-md);
        transform: translateY(-150%);
        opacity: 0;
        transition: all var(--transition-base);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 60px;
        padding-right: 0;
        justify-content: flex-start;
    }
    
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 0;
        margin-right: 0;
    }
    
    .timeline-item:nth-child(odd) .timeline-dot,
    .timeline-item:nth-child(even) .timeline-dot {
        left: 10px;
        right: auto;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    .section {
        padding: var(--space-2xl) 0;
    }
    
    .portfolio-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-container {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        max-width: 100%;
    }
    
    .footer-contact li {
        justify-content: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .hero-photo-wrapper {
        width: 250px;
        height: 300px;
    }
    
    .floating-badge {
        display: none;
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
    }
}

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

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .navbar,
    .footer,
    .animated-bg,
    .floating-shapes {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .glass-card {
        background: white;
        border: 1px solid #ddd;
    }
}