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

/* CSS Custom Properties (Variables) */
:root {
    /* Modern Color Palette */
    --color-primary: #6366f1;
    --color-primary-light: #8b5cf6;
    --color-primary-dark: #4f46e5;
    --color-secondary: #06b6d4;
    --color-accent: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* Text Colors */
    --color-text: #0f172a;
    --color-text-light: #475569;
    --color-text-lighter: #64748b;
    --color-text-muted: #94a3b8;
    
    /* Background Colors */
    --color-bg: #ffffff;
    --color-bg-light: #f8fafc;
    --color-bg-secondary: #f1f5f9;
    --color-bg-dark: #0f172a;
    --color-bg-glass: rgba(255, 255, 255, 0.25);
    --color-bg-glass-dark: rgba(15, 23, 42, 0.25);
    
    /* Border & Shadow */
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-shadow: rgba(15, 23, 42, 0.08);
    --color-shadow-lg: rgba(15, 23, 42, 0.15);
    
    /* Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
    
    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-display: 'Cal Sans', 'Inter', sans-serif;
    --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;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    --spacing-5xl: 8rem;
    
    /* Layout */
    --container-width: 1200px;
    --border-radius-sm: 0.5rem;
    --border-radius-md: 0.75rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    --border-radius-2xl: 2rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 var(--color-shadow);
    --shadow-md: 0 4px 6px -1px var(--color-shadow), 0 2px 4px -1px var(--color-shadow);
    --shadow-lg: 0 10px 15px -3px var(--color-shadow-lg), 0 4px 6px -2px var(--color-shadow);
    --shadow-xl: 0 20px 25px -5px var(--color-shadow-lg), 0 10px 10px -5px var(--color-shadow);
    --shadow-2xl: 0 25px 50px -12px var(--color-shadow-lg);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    
    /* Modern Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    --gradient-secondary: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    --gradient-warm: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    --gradient-cool: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    --gradient-mesh: conic-gradient(from 230.29deg at 51.63% 52.16%, #2400ff 0deg, #09fbd3 67.5deg, #08f 103.12deg, #f90 160.87deg, #c0f 218.62deg, #90f 273.75deg, #2400ff 360deg);
}

/* Dark theme styles */
[data-theme="dark"] {
    --color-bg: #0f172a;
    --color-bg-light: #1e293b;
    --color-bg-secondary: #334155;
    --color-text: #f1f5f9;
    --color-text-light: #cbd5e1;
    --color-text-lighter: #94a3b8;
    --color-text-muted: #64748b;
    --color-border: #334155;
    --color-border-light: #475569;
    --glass-bg: rgba(30, 41, 59, 0.4);
    --glass-border: rgba(148, 163, 184, 0.3);
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-lg: rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.5), 0 0 50px rgba(139, 92, 246, 0.3);
}

[data-theme="dark"] body::before {
    background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 40% 80%, rgba(6, 182, 212, 0.15) 0%, transparent 50%);
}

/* Base Typography */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-light) 100%);
    background-attachment: fixed;
    position: relative;
    overflow-x: hidden;
}

/* Add animated background particles */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 40% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(2deg); }
    66% { transform: translateY(10px) rotate(-1deg); }
}

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

/* Header and Navigation */
.header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    transition: var(--transition-normal);
    box-shadow: var(--glass-shadow);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-md);
    max-width: var(--container-width);
    margin: 0 auto;
}

.nav__logo {
    font-size: var(--font-size-xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
}

.nav__logo-link {
    text-decoration: none;
    display: inline-block;
    transition: var(--transition-normal);
}

.nav__logo-link:hover {
    transform: translateY(-1px);
    filter: brightness(1.1);
}

.nav__logo-link:hover .nav__logo {
    transform: scale(1.02);
}

.nav__menu {
    display: none;
    list-style: none;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav__item {
    display: flex;
    align-items: center;
}

.nav__link {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: var(--transition-normal);
    position: relative;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-lg);
}

.nav__link:hover {
    color: var(--color-primary);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    transform: translateY(-1px);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-bounce);
    transform: translateX(-50%);
    border-radius: 1px;
}

.nav__link:hover::after {
    width: 80%;
}

/* Mobile Navigation */
.nav__toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
}

.nav__hamburger,
.nav__hamburger::before,
.nav__hamburger::after {
    content: '';
    width: 25px;
    height: 3px;
    background-color: var(--color-text);
    transition: var(--transition-fast);
}

.nav__hamburger::before {
    transform: translateY(-8px);
}

.nav__hamburger::after {
    transform: translateY(5px);
}

.nav__toggle--active .nav__hamburger {
    background-color: transparent;
}

.nav__toggle--active .nav__hamburger::before {
    transform: rotate(45deg);
}

.nav__toggle--active .nav__hamburger::after {
    transform: rotate(-45deg);
}

/* Theme Toggle Button */
.theme-toggle {
    position: static;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    border: 2px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-normal);
    user-select: none;
    color: var(--color-text);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(10deg);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    border-color: var(--color-primary);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle__icon {
    transition: transform 0.3s ease;
}

.theme-toggle:hover .theme-toggle__icon {
    transform: rotate(15deg);
}

/* Language Selector */
.language-selector {
    position: relative;
    margin-left: var(--spacing-lg);
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
    min-width: 4rem;
}

.lang-toggle:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    border-color: var(--color-primary);
}

.lang-current {
    font-weight: 700;
    letter-spacing: 0.05em;
}

.lang-arrow {
    font-size: 0.75rem;
    transition: transform var(--transition-fast);
}

.language-selector:hover .lang-arrow {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-normal);
    z-index: 1000;
    overflow: hidden;
}

.lang-dropdown--active,
.language-selector.is-open .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    text-align: left;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition-fast);
    border-bottom: 1px solid var(--glass-border);
}

.lang-option:last-child {
    border-bottom: none;
}

.lang-option:hover {
    background: var(--glass-bg);
    color: var(--color-primary);
}

.lang-option.active {
    background: var(--color-primary);
    color: white;
    font-weight: 600;
}

.lang-option.active:hover {
    background: var(--color-primary-dark);
    color: white;
}

/* Simple Language Toggle Button */
.lang-toggle-btn {
    position: static;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    border: 2px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    font-weight: 700;
    transition: var(--transition-normal);
    user-select: none;
    color: var(--color-text);
    letter-spacing: 0.5px;
}

.lang-toggle-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    border-color: var(--color-primary);
}

.lang-toggle-btn:active {
    transform: scale(0.95);
}

.lang-toggle-btn:focus {
    outline: none;
    box-shadow: var(--shadow-xl), 0 0 0 3px rgba(99, 102, 241, 0.3);
}

.lang-current {
    font-weight: 700;
    letter-spacing: 0.5px;
    transition: transform 0.3s ease;
}

.lang-toggle-btn:hover .lang-current {
    transform: scale(1.05);
}

/* Hero Section */
.hero {
    padding: calc(100px + var(--spacing-4xl)) var(--spacing-md) var(--spacing-5xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-height: 100vh;
    justify-content: center;
    background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.1) 0%, transparent 70%),
                linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-light) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--gradient-mesh);
    opacity: 0.03;
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero__content {
    max-width: 700px;
    margin-bottom: var(--spacing-3xl);
    position: relative;
    z-index: 1;
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: 900;
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    letter-spacing: -0.025em;
    animation: fadeInUp 0.8s ease-out;
}

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

.hero__subtitle {
    font-size: var(--font-size-2xl);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.hero__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero__actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero__image {
    width: 250px;
    height: 250px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero__avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    position: relative;
    box-shadow: var(--shadow-2xl), 0 0 40px rgba(99, 102, 241, 0.3);
    transition: var(--transition-normal);
    border: 4px solid var(--glass-border);
}

.hero__avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-2xl), var(--shadow-glow);
}

.hero__image::before {
    content: '';
    position: absolute;
    inset: -8px;
    background: var(--gradient-primary);
    border-radius: 50%;
    z-index: -1;
    opacity: 0.5;
    filter: blur(12px);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border: none;
    border-radius: var(--border-radius-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    min-width: 160px;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.025em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

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

.btn--primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn--primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    filter: brightness(1.1);
}

.btn--secondary {
    background: var(--glass-bg);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.btn--small {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-sm);
    min-width: 120px;
    border-radius: var(--border-radius-lg);
}

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

.btn--outline:hover {
    background: var(--color-bg-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn--full {
    width: 100%;
}

/* Sections */
.section {
    padding: var(--spacing-5xl) 0;
    position: relative;
}

.section:nth-child(even) {
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.02) 0%, transparent 70%),
                var(--color-bg-light);
}

.section__title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    color: var(--color-text);
    letter-spacing: -0.025em;
    position: relative;
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: -var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* About Section */
.about__content {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-3xl);
    align-items: flex-start;
    justify-content: flex-start;
}

@media (max-width: 900px) {
    .about__content {
        flex-direction: column;
        align-items: stretch;
    }
}

.about__stats {
    min-width: 180px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
}

.about__main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.about__stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-2xl);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stat:hover::before {
    transform: scaleX(1);
}

.stat__number {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.025em;
}

.stat__label {
    color: var(--color-text-light);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* About Highlights */
.about__highlights {
    margin-top: var(--spacing-xl);
}

.highlights__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.highlight__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-xl);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.highlight__item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transition: var(--transition-normal);
}

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

.highlight__item:hover::before {
    transform: scaleY(1);
}

.highlight__icon {
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-lg);
    position: relative;
}

.highlight__icon::before {
    content: '';
    position: absolute;
    inset: 2px;
    background: var(--color-bg);
    border-radius: calc(var(--border-radius-lg) - 2px);
    z-index: -1;
}

.highlight__text {
    color: var(--color-text-light);
    font-weight: 500;
    font-size: var(--font-size-base);
    line-height: 1.5;
}

/* Skills Section */
.skills__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

/* Experience Section */
.experience__content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-4xl);
    align-items: start;
}

.experience__summary {
    position: relative;
}

.experience__overview {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-2xl);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.experience__overview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.experience__subtitle {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
    letter-spacing: -0.025em;
}

.experience__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: var(--spacing-2xl);
}

.experience__highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

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

.highlight-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.highlight-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.025em;
}

.highlight-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.experience__timeline {
    position: relative;
}

/* Accordion Styles */
.accordion {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-2xl);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.accordion__item {
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition-normal);
}

.accordion__item:last-child {
    border-bottom: none;
}

.accordion__item--active {
    background: var(--color-bg-light);
}

.accordion__header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: var(--transition-normal);
    position: relative;
}

.accordion__header:hover {
    background: var(--color-bg-light);
}

.accordion__header:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.accordion__title {
    flex: 1;
}

.accordion__title h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--color-text);
    letter-spacing: -0.025em;
}

.accordion__company {
    font-size: var(--font-size-base);
    color: var(--color-primary);
    font-weight: 600;
}

.accordion__meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    text-align: right;
}

.accordion__period {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 600;
    background: var(--color-bg);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
}

.accordion__icon {
    font-size: var(--font-size-xl);
    font-weight: 300;
    color: var(--color-primary);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border-radius: 50%;
    border: 1px solid var(--color-primary);
    transition: var(--transition-normal);
}

.accordion__item--active .accordion__icon {
    background: var(--color-primary);
    color: white;
    transform: rotate(180deg);
}

.accordion__content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.accordion__details {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
}

.accordion__location {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.accordion__responsibilities {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.accordion__responsibilities li {
    padding: var(--spacing-sm) 0 var(--spacing-sm) var(--spacing-xl);
    color: var(--color-text-light);
    position: relative;
    line-height: 1.6;
    transition: var(--transition-fast);
}

.accordion__responsibilities li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
    font-size: var(--font-size-lg);
}

.accordion__responsibilities li:hover {
    color: var(--color-text);
    transform: translateX(4px);
}

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

.accordion__technologies .tech-tag {
    background: var(--gradient-secondary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: 0.025em;
    text-transform: uppercase;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

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

.skill-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-2xl);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.skill-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-2xl);
    border-color: rgba(99, 102, 241, 0.3);
}

.skill-card__icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-lg);
    filter: drop-shadow(0 2px 4px rgba(99, 102, 241, 0.3));
    position: relative;
    z-index: 2;
}

.skill-card__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    letter-spacing: -0.025em;
    position: relative;
    z-index: 2;
}

.skill-card__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    position: relative;
    z-index: 2;
}

.skill-card__list {
    list-style: none;
    position: relative;
    z-index: 2;
}

.skill-card__list li {
    padding: var(--spacing-sm) 0;
    color: var(--color-text-light);
    position: relative;
    padding-left: var(--spacing-xl);
    transition: var(--transition-fast);
}

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

.skill-card__list li:hover {
    color: var(--color-text);
    transform: translateX(4px);
}

/* Projects Section */
.projects__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.project-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-2xl);
    border: 1px solid var(--glass-border);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}


.project-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-2xl);
    border-color: rgba(99, 102, 241, 0.3);
}

.project-card__image {
    height: 240px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-card__image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    opacity: 0.1;
    animation: rotate 30s linear infinite;
}

.project-card__placeholder {
    font-size: var(--font-size-5xl);
    color: white;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
    position: relative;
    z-index: 1;
}

.project-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    position: relative;
    z-index: 1;
}

.project-card__content {
    padding: var(--spacing-2xl);
}

.project-card__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    letter-spacing: -0.025em;
}

.project-card__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.project-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.tech-tag {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-lg);
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: 0.025em;
    text-transform: uppercase;
    box-shadow: var(--shadow-sm);
}

.project-card__links {
    display: flex;
    gap: var(--spacing-md);
}

/* Contact Section */
.contact__content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4xl);
}

.contact__info {
    flex: 1;
}

.contact__subtitle {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
    letter-spacing: -0.025em;
}

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

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

.contact__link {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    transition: var(--transition-normal);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

.contact__link:hover {
    color: var(--color-primary);
    transform: translateX(8px);
    background: var(--color-bg);
    box-shadow: var(--shadow-md);
}

.contact__icon {
    font-size: var(--font-size-2xl);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

/* Forms */
.contact__form {
    flex: 1;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--spacing-3xl);
    border-radius: var(--border-radius-2xl);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
}

.form__group {
    margin-bottom: var(--spacing-xl);
}

.form__label {
    display: block;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    color: var(--color-text);
    font-size: var(--font-size-sm);
    letter-spacing: 0.025em;
    text-transform: uppercase;
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--spacing-lg);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: var(--transition-normal);
    background: var(--color-bg);
    color: var(--color-text);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.form__textarea {
    resize: vertical;
    min-height: 140px;
    line-height: 1.6;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1e293b 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
}

.footer__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    text-align: center;
    position: relative;
    z-index: 1;
    justify-content: center;
}

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

.footer__links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer__link {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-normal);
    font-weight: 500;
    position: relative;
}

.footer__link:hover {
    color: white;
    transform: translateY(-2px);
}

.footer__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

.footer__link:hover::after {
    width: 100%;
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
    /* Theme toggle is now part of the menu, no special positioning needed */
    .nav__menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        border-top: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }
    
    .nav__menu--active {
        display: flex;
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    /* Language toggle button mobile styles */
    .lang-toggle-btn {
        align-self: center;
        width: 2.75rem;
        height: 2.75rem;
        font-size: var(--font-size-sm);
    }
    
    .hero__actions {
        flex-direction: column;
    }
    
    .project-card__links {
        flex-direction: column;
    }
    
    .contact__content {
        gap: var(--spacing-2xl);
    }
    
    .footer__content {
        gap: var(--spacing-lg);
        justify-content: center;
    }
    
    .experience__highlights {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .accordion__header {
        padding: var(--spacing-lg);
    }
    
    .accordion__details {
        padding: 0 var(--spacing-lg) var(--spacing-lg);
    }
    
    .accordion__meta {
        flex-direction: column;
        align-items: flex-end;
        gap: var(--spacing-sm);
    }
    
    .accordion__technologies {
        gap: var(--spacing-xs);
    }
    
    .accordion__technologies .tech-tag {
        font-size: 10px;
        padding: 2px 6px;
    }
}

/* Tablet Styles */
@media (min-width: 768px) {
    /* Theme toggle is now part of the menu, no special positioning needed */
    .nav__toggle {
        display: none;
    }
    
    .nav__menu {
        display: flex;
        gap: var(--spacing-sm);
    }
    
    .hero {
        flex-direction: row;
        text-align: left;
        gap: var(--spacing-4xl);
    }
    
    .hero__content {
        flex: 1;
        margin-bottom: 0;
    }
    
    .hero__actions {
        flex-direction: row;
    }
    
    .about__content {
        flex-direction: row;
        align-items: center;
    }
    
    .experience__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .skills__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .projects__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact__content {
        flex-direction: row;
    }
    
    .project-card__links {
        flex-direction: row;
    }
    
    .footer__content {
        flex-direction: row;
        justify-content: space-between;
        justify-content: center;
    }
    
    .accordion__header {
        padding: var(--spacing-lg) var(--spacing-xl);
    }
    
    .accordion__details {
        padding: 0 var(--spacing-xl) var(--spacing-xl);
    }
}

/* Desktop Styles */
@media (min-width: 1024px) {
    .skills__grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .projects__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Large Desktop Styles */
@media (min-width: 1280px) {
    .hero__title {
        font-size: var(--font-size-6xl);
    }
    .skills__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Automatic dark mode support (fallback) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --color-bg: #0f172a;
        --color-bg-light: #1e293b;
        --color-bg-secondary: #334155;
        --color-text: #f1f5f9;
        --color-text-light: #cbd5e1;
        --color-text-lighter: #94a3b8;
        --color-text-muted: #64748b;
        --color-border: #334155;
        --color-border-light: #475569;
        --glass-bg: rgba(30, 41, 59, 0.4);
        --glass-border: rgba(148, 163, 184, 0.3);
        --color-shadow: rgba(0, 0, 0, 0.3);
        --color-shadow-lg: rgba(0, 0, 0, 0.5);
        --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.5), 0 0 50px rgba(139, 92, 246, 0.3);
    }
    
    :root:not([data-theme]) body::before {
        background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
                    radial-gradient(circle at 40% 80%, rgba(6, 182, 212, 0.15) 0%, transparent 50%);
    }
}

/* Desktop Styles */
@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
    
    .hero__title {
        font-size: var(--font-size-5xl);
    }
    
    .experience__content {
        grid-template-columns: 1fr 2fr;
        gap: var(--spacing-4xl);
    }
    
    .skills__grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .projects__grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .hero__image {
        width: 300px;
        height: 300px;
    }
    
    .accordion__header {
        padding: var(--spacing-xl) var(--spacing-2xl);
    }
    
    .accordion__details {
        padding: 0 var(--spacing-2xl) var(--spacing-xl);
    }
    
    .accordion__meta {
        gap: var(--spacing-xl);
    }
    
    .experience__highlights {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    color: white;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.back-to-top:hover {
    transform: translateY(-4px) scale(1.1);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    filter: brightness(1.1);
}

.back-to-top:active {
    transform: translateY(-2px) scale(1.05);
}

.back-to-top--visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    border-radius: 50%;
    z-index: -1;
    filter: blur(8px);
    opacity: 0.6;
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.1);
    }
}

/* Large Desktop Styles */
@media (min-width: 1280px) {
    .section {
        padding: var(--spacing-4xl) 0;
    }
    
    .hero__title {
        font-size: 4rem;
    }
}

/* Privacy Page Styles */
.privacy-page {
    padding: var(--spacing-2xl) 0;
    min-height: 100vh;
}

.privacy-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
    padding-top: var(--spacing-4xl);
}

.privacy-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.privacy-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-2xl);
}

.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

.privacy-section {
    margin-bottom: var(--spacing-3xl);
}

.privacy-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
}

.privacy-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin: var(--spacing-xl) 0 var(--spacing-md) 0;
}

.privacy-section p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.privacy-section ul {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-xl);
}

.privacy-section li {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.privacy-highlight {
    background: var(--color-bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-primary);
    margin-bottom: var(--spacing-2xl);
}

.privacy-contact {
    background: var(--color-bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    margin-top: var(--spacing-3xl);
}

.privacy-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.privacy-back-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-normal);
}

.privacy-back-link:hover {
    color: var(--color-primary-dark);
}

.privacy-logo {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--color-text);
    text-decoration: none;
}

.privacy-last-updated {
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}