/* ===========================
   CSS VARIABLES & RESET
   =========================== */
:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f0f2f5;
    --text-primary: #1a1a1a;
    --text-secondary: #6c757d;
    --text-tertiary: #8e9aaf;
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --border-color: #e5e7eb;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Container */
    --container-width: 1280px;
}

/* Dark Mode Colors */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --border-color: #334155;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-base), color var(--transition-base);
    overflow-x: hidden;
}

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

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

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

/* ===========================
   NAVIGATION
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--bg-primary);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: var(--spacing-xs) 0;
}

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

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

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

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-base);
}

/* ===========================
   HERO SECTION
   =========================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    padding: var(--spacing-3xl) 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-secondary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
}

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

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.title-line {
    display: block;
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 0.2s forwards;
}

.title-highlight {
    display: block;
    font-size: 3.5rem;
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 0.4s forwards;
}

.separator {
    color: var(--text-secondary);
    margin: 0 0.25rem;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 0.6s forwards;
}

.hero-description-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    max-width: 650px;
}

.hero-description-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    opacity: 0;
    animation: fadeInLeft 0.5s ease-out forwards;
}

.hero-description-item:nth-child(1) {
    animation-delay: 0.8s;
}

.hero-description-item:nth-child(2) {
    animation-delay: 1s;
}

.hero-description-item:nth-child(3) {
    animation-delay: 1.2s;
}

.hero-description-item i {
    color: var(--accent-primary);
    font-size: 1rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 1.4s forwards;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    opacity: 0;
    animation: fadeInUp 0.6s ease-out 1.6s forwards;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 2.25rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

.hero-image {
    position: relative;
}

.image-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.image-placeholder {
    width: 100%;
    aspect-ratio: 1;
    background: var(--accent-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    color: white;
    box-shadow: var(--shadow-xl);
}

.professional-photo {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    position: relative;
    border: 2px solid var(--border-color);
}

.professional-photo::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-gradient);
    opacity: 0;
    z-index: 1;
    transition: opacity var(--transition-base);
}

.professional-photo:hover::before {
    opacity: 0.05;
}

.professional-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    position: relative;
    z-index: 2;
}

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

.credential-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.credential-badge:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.credential-badge i {
    font-size: 1rem;
    color: var(--accent-primary);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-tertiary);
    font-size: 0.875rem;
    animation: bounce 2s ease-in-out infinite;
}

.mouse {
    width: 24px;
    height: 36px;
    border: 2px solid var(--text-tertiary);
    border-radius: var(--radius-lg);
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background-color: var(--text-tertiary);
    border-radius: 2px;
    animation: scroll 1.5s ease-in-out infinite;
}

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

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

/* ===========================
   BUTTONS
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    white-space: nowrap;
}

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

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
}

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

/* ===========================
   SECTION STYLING
   =========================== */
section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-tag {
    display: inline-block;
    background: var(--bg-secondary);
    color: var(--accent-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

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

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

.about-text .lead {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.about-text p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-secondary);
}

.highlight-item i {
    color: var(--accent-primary);
    font-size: 1.25rem;
}

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

.fact-card {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

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

.fact-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: white;
    margin-bottom: var(--spacing-md);
}

.fact-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.fact-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===========================
   EXPERIENCE SECTION
   =========================== */
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

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

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

.timeline-marker {
    position: absolute;
    left: -8px;
    top: 0;
    width: 18px;
    height: 18px;
    background: var(--accent-gradient);
    border-radius: 50%;
    border: 3px solid var(--bg-primary);
    box-shadow: var(--shadow-md);
}

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

.timeline-content:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-lg);
}

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

.timeline-header h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.timeline-header h4 {
    font-size: 1.125rem;
    color: var(--accent-primary);
    font-weight: 600;
}

.timeline-date {
    background: var(--bg-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    border: 1px solid var(--border-color);
}

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

.timeline-list li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

.timeline-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-size: 1.25rem;
}

.timeline-list a {
    color: var(--accent-primary);
    text-decoration: underline;
}

.timeline-list a:hover {
    color: var(--accent-secondary);
}

/* ===========================
   SKILLS SECTION
   =========================== */
.skills {
    background: var(--bg-secondary);
}

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

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

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: white;
    margin-bottom: var(--spacing-md);
}

.skill-category h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

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

.skill-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.skill-tag:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-2px);
}

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

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

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    position: relative;
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.project-link {
    width: 60px;
    height: 60px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent-primary);
    transition: all var(--transition-base);
}

.project-link:hover {
    transform: scale(1.1);
}

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

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

.project-tags span {
    background: var(--bg-primary);
    color: var(--accent-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.project-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.project-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.project-tech span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.project-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--accent-primary);
    font-weight: 600;
    margin-top: var(--spacing-md);
}

.project-cta:hover {
    gap: var(--spacing-md);
}

.project-placeholder-card {
    border: 2px dashed var(--border-color);
    background: transparent;
}

.project-placeholder-content {
    padding: var(--spacing-xl);
    text-align: center;
}

.project-placeholder-content i {
    font-size: 3rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-md);
}

.project-placeholder-content h3 {
    margin-bottom: var(--spacing-md);
}

.project-placeholder-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.project-placeholder-content ul {
    list-style: none;
    text-align: left;
    max-width: 300px;
    margin: 0 auto;
}

.project-placeholder-content li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--spacing-lg);
}

.project-placeholder-content li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

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

.education-timeline {
    max-width: 900px;
    margin: 0 auto;
}

.education-item {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

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

.education-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: white;
}

.education-content {
    flex: 1;
}

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

.education-header h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.education-header h4 {
    font-size: 1rem;
    color: var(--accent-primary);
    font-weight: 600;
}

.education-date {
    background: var(--bg-secondary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    border: 1px solid var(--border-color);
}

.education-content p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===========================
   CONTACT SECTION
   =========================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
    max-width: 1100px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xl);
}

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

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

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

.method-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: white;
    flex-shrink: 0;
}

.method-details h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.method-details p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

.social-links a {
    width: 50px;
    height: 50px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.social-links a:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.contact-form {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

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

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.footer-brand p {
    color: var(--text-secondary);
}

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

.footer-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: all var(--transition-base);
}

.footer-links a:hover {
    color: var(--accent-primary);
    padding-left: var(--spacing-sm);
}

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

.footer-social a {
    width: 45px;
    height: 45px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.footer-social a:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-5px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.footer-bottom p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
}

/* ===========================
   ANIMATIONS
   =========================== */
.fade-in {
    animation: fadeIn 0.8s ease-out;
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

.delay-1 {
    animation-delay: 0.2s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.delay-2 {
    animation-delay: 0.4s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.delay-3 {
    animation-delay: 0.6s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.delay-4 {
    animation-delay: 0.8s;
    opacity: 0;
    animation-fill-mode: forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* ===========================
   RESPONSIVE DESIGN
   =========================== */
@media (max-width: 1024px) {
    .hero-content,
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .hero-image {
        order: -1;
    }
    
    .image-container {
        max-width: 400px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .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, -7px);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .title-line {
        font-size: 2rem;
    }
    
    .title-highlight {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-description-item {
        font-size: 0.95rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-stats {
        gap: var(--spacing-lg);
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    .stat-label {
        font-size: 0.75rem;
    }
    
    .stat-divider {
        display: none;
    }
    
    .hero-stats {
        flex-wrap: wrap;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .timeline::before {
        left: 8px;
    }
    
    .timeline-item {
        padding-left: var(--spacing-2xl);
    }
    
    .timeline-header {
        flex-direction: column;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .education-item {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-3xl: 3rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 0.875rem;
    }
    
    .floating-card {
        font-size: 0.75rem;
        padding: var(--spacing-sm);
    }
    
    .floating-card i {
        font-size: 1.25rem;
    }
}