/* ========================================
   CSS Variables & Root Styles
======================================== */
:root {
    /* Colors - Light Theme */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --accent-color: #06b6d4;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    --text-inverse: #ffffff;
    
    /* Border & Shadow */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #64748b;
    
    --border-color: #334155;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.2);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.2);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.2);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.4), 0 8px 10px -6px rgb(0 0 0 / 0.3);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input,
textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ========================================
   Utility Classes
======================================== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 8px 16px;
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 15px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

/* Hidden Class */
.hidden {
    display: none !important;
}

/* ========================================
   Navigation
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px 0;
    background: transparent;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
    padding: 10px 0;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 28px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-link {
    padding: 10px 18px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all var(--transition-fast);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 30px;
    justify-content: center;
}

.bar {
    width: 100%;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 20px;
        gap: 5px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        opacity: 0;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
        padding: 15px;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }
}

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

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
}

.gradient-sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.sphere-1 {
    width: 600px;
    height: 600px;
    background: var(--primary-color);
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.sphere-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary-color);
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

.sphere-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-color);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(50px, -50px) scale(1.1);
    }
    50% {
        transform: translate(-30px, 30px) scale(0.9);
    }
    75% {
        transform: translate(-50px, -30px) scale(1.05);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.hero-text {
    flex: 1;
}

.hero-greeting {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.hero-name {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    line-height: 1.2;
}

.hero-title {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    min-height: 40px;
}

.typewriter {
    border-right: 3px solid var(--primary-color);
    animation: blink 0.7s infinite;
}

.cursor {
    animation: blink 0.7s infinite;
    color: var(--primary-color);
}

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

.hero-description {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero-socials {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-inverse);
    transform: translateY(-5px);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.profile-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    text-align: center;
}

.profile-avatar {
    width: 150px;
    height: 150px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    margin: 0 auto 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 60px;
    color: var(--text-inverse);
}

.profile-stats {
    display: flex;
    gap: 30px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 1;
}

.scroll-indicator a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    transition: color var(--transition-fast);
}

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

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-secondary);
    border-radius: 20px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    50% {
        opacity: 0.5;
        transform: translateX(-50%) translateY(10px);
    }
}

@media (max-width: 968px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-description {
        margin: 0 auto 30px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-socials {
        justify-content: center;
    }
}

/* ========================================
   About Section
======================================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: center;
}

.about-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.card-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--gradient-primary);
}

.info-box {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: 15px;
    transition: transform var(--transition-fast);
}

.info-box:last-child {
    margin-bottom: 0;
}

.info-box:hover {
    transform: translateX(10px);
}

.info-box i {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.info-box h4 {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: 3px;
}

.info-box p {
    font-weight: 600;
    color: var(--text-primary);
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-highlights {
    display: flex;
    gap: 20px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.highlight {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.highlight:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
}

.highlight i {
    color: var(--primary-color);
}

.highlight:hover i {
    color: var(--text-inverse);
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Experience Timeline Section
======================================== */
.experience {
    background: var(--bg-secondary);
}

.timeline-toggle {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
}

.toggle-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.toggle-btn:hover,
.toggle-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-inverse);
}

.timeline-container {
    max-width: 800px;
    margin: 0 auto;
}

.timeline {
    position: relative;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s forwards;
}

.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }
.timeline-item:nth-child(4) { animation-delay: 0.4s; }
.timeline-item:nth-child(5) { animation-delay: 0.5s; }
.timeline-item:nth-child(6) { animation-delay: 0.6s; }

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

.timeline-marker {
    position: absolute;
    left: -50px;
    width: 44px;
    height: 44px;
    background: var(--bg-card);
    border: 3px solid var(--primary-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--primary-color);
    z-index: 1;
    transition: all var(--transition-fast);
}

.timeline-marker.achievement {
    background: var(--gradient-primary);
    border-color: var(--primary-color);
    color: var(--text-inverse);
}

.timeline-marker.gold {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border-color: #f59e0b;
}

.timeline-item:hover .timeline-marker {
    transform: scale(1.2);
}

.timeline-content {
    background: var(--bg-card);
    padding: 25px 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

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

.timeline-date {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.timeline-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.timeline-subtitle {
    font-size: 15px;
    font-weight: 500;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.timeline-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 15px;
}

.timeline-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    padding: 5px 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.tag.highlight {
    background: var(--gradient-primary);
    color: var(--text-inverse);
}

/* ========================================
   Skills Section
======================================== */
.skills-content {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.skills-category {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.category-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.category-title i {
    width: 45px;
    height: 45px;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.skill-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 25px;
    text-align: center;
    transition: all var(--transition-fast);
}

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

.skill-icon {
    width: 70px;
    height: 70px;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    margin: 0 auto 15px;
}

.skill-icon.arduino {
    background: linear-gradient(135deg, #00979D 0%, #00878F 100%);
}

.skill-icon.raspberry {
    background: linear-gradient(135deg, #C51A4A 0%, #8B1538 100%);
}

.skill-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.skill-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 10px;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    width: 0;
    transition: width 1.5s ease;
}

.skill-level {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.skill-card.language .skill-icon {
    background: transparent;
}

.flag {
    font-size: 40px;
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

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

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

.project-card.featured {
    grid-column: span 2;
}

@media (max-width: 768px) {
    .project-card.featured {
        grid-column: span 1;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

.project-image {
    height: 200px;
    background: var(--gradient-primary);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-card.featured .project-image {
    height: 250px;
}

.project-icon {
    font-size: 60px;
    color: rgba(255, 255, 255, 0.3);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.project-links {
    display: flex;
    gap: 15px;
}

.project-link {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--bg-card);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: all var(--transition-fast);
    transform: translateY(20px);
}

.project-card:hover .project-link {
    transform: translateY(0);
}

.project-link:hover {
    background: var(--primary-color);
    color: var(--text-inverse);
}

.project-content {
    padding: 25px;
}

.project-badge {
    display: inline-block;
    padding: 5px 12px;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.project-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.project-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 15px;
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.project-tags span {
    padding: 5px 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.projects-cta {
    text-align: center;
    margin-top: 50px;
}

/* ========================================
   Contact Section
======================================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.8;
}

.contact-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

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

.contact-icon {
    width: 55px;
    height: 55px;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: 3px;
}

.contact-details a,
.contact-details p {
    font-weight: 600;
    color: var(--text-primary);
}

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

.contact-form-wrapper {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

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

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

@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Footer
======================================== */
.footer {
    background: var(--bg-secondary);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.footer-logo {
    font-size: 32px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 5px;
}

.footer-links {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

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

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

.footer-socials {
    display: flex;
    gap: 15px;
}

.footer-socials a {
    width: 45px;
    height: 45px;
    border-radius: var(--radius-full);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.footer-socials a:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-inverse);
}

.footer-bottom {
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-tertiary);
    font-size: 14px;
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

/* ========================================
   Back to Top Button
======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 999;
}

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

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

/* ========================================
   Animations
======================================== */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Responsive Adjustments */
@media (max-width: 480px) {
    .section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 14px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    
    .profile-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .timeline {
        padding-left: 40px;
    }
    
    .timeline::before {
        left: 15px;
    }
    
    .timeline-marker {
        left: -40px;
        width: 34px;
        height: 34px;
        font-size: 14px;
    }
    
    .timeline-content {
        padding: 20px;
    }
    
    .contact-form-wrapper {
        padding: 25px;
    }
}