/* ===================================
   Ultra-Premium 3D Portfolio - Main Styles
   ================================== */

/* === CSS Custom Properties === */
:root {
    /* Colors - Premium Neon Palette */
    --primary-cyan: #00d4ff;
    --primary-blue: #0066ff;
    --secondary-purple: #8b5cf6;
    --secondary-magenta: #ec4899;
    --accent-green: #00ff88;
    --accent-yellow: #ffd700;
    
    /* Dark Theme */
    --bg-dark: #0a0a0f;
    --bg-dark-elevated: #131318;
    --bg-dark-card: #1a1a24;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7f;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
    --gradient-secondary: linear-gradient(135deg, var(--secondary-purple), var(--secondary-magenta));
    --gradient-accent: linear-gradient(135deg, var(--accent-green), var(--primary-cyan));
    --gradient-rainbow: linear-gradient(90deg, var(--primary-cyan), var(--secondary-purple), var(--secondary-magenta), var(--accent-green));
    
    /* Glassmorphism */
    --glass-bg: rgba(26, 26, 36, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Timing Functions */
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-elastic: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow-cyan: 0 0 20px rgba(0, 212, 255, 0.5);
    --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.5);
    --shadow-glow-green: 0 0 20px rgba(0, 255, 136, 0.5);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* === Custom Cursor === */
.custom-cursor {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary-cyan);
    position: fixed;
    pointer-events: none;
    z-index: 10000;
    mix-blend-mode: difference;
    transition: transform 0.2s var(--ease-smooth);
}

.cursor-follower {
    width: 40px;
    height: 40px;
    border: 2px solid var(--primary-cyan);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transition: all 0.15s var(--ease-smooth);
    opacity: 0.5;
}

/* === Particle Background === */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

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

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

a {
    color: var(--primary-cyan);
    text-decoration: none;
    transition: all 0.3s var(--ease-smooth);
}

a:hover {
    color: var(--accent-green);
}

/* === Utility Classes === */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glow {
    text-shadow: var(--shadow-glow-cyan);
}

.glow-text {
    color: var(--primary-cyan);
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.6);
}

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

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

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-2xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.title-number {
    font-family: var(--font-primary);
    color: var(--primary-cyan);
    font-weight: 600;
}

/* === Glassmorphism Card === */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    padding: var(--spacing-xl);
    transition: all 0.4s var(--ease-smooth);
}

.glass-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 8px 32px 0 rgba(0, 212, 255, 0.2);
    transform: translateY(-5px);
}

/* === Buttons === */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all 0.3s var(--ease-bounce);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.4);
}

.btn-primary:hover {
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.6);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--primary-cyan);
    color: var(--bg-dark);
    box-shadow: var(--shadow-glow-cyan);
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: all 0.3s var(--ease-smooth);
}

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

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-display);
}

.logo-text {
    position: relative;
    z-index: 1;
}

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

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all 0.3s var(--ease-smooth);
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
    transition: width 0.3s var(--ease-smooth);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--primary-cyan);
    transition: all 0.3s var(--ease-smooth);
}

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

.hero-canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 600px;
}

.hero-greeting {
    display: block;
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.hero-name {
    display: block;
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.hero-roles {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-items: center;
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

.role-item {
    color: var(--text-secondary);
}

.role-divider {
    color: var(--primary-cyan);
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

.highlight {
    color: var(--accent-green);
    font-weight: 600;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* === Hero Avatar === */
.hero-avatar {
    position: relative;
    width: 400px;
    height: 400px;
    margin: 0 auto;
}

.avatar-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border: 2px solid var(--primary-cyan);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.avatar-ring::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    width: 20px;
    height: 20px;
    background: var(--accent-green);
    border-radius: 50%;
    box-shadow: var(--shadow-glow-green);
}

.ring-2 {
    width: 110%;
    height: 110%;
    border-color: var(--secondary-purple);
    animation-duration: 15s;
    animation-direction: reverse;
}

.avatar-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary-cyan);
    box-shadow: var(--shadow-glow-cyan), inset 0 0 30px rgba(0, 212, 255, 0.2);
    background: var(--gradient-primary);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(1.1) contrast(1.1);
}

/* === Scroll Indicator === */
.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-secondary);
    font-size: 0.9rem;
    z-index: 1;
}

.scroll-mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--primary-cyan);
    border-radius: 15px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--primary-cyan);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 1.5s infinite;
}

/* === Hero Wave === */
.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px;
    overflow: hidden;
    z-index: 1;
}

.wave-path {
    fill: var(--bg-dark-elevated);
    animation: wave-motion 10s ease-in-out infinite;
}

/* === About Section === */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

.about-text h3 {
    color: var(--primary-cyan);
    margin-bottom: var(--spacing-md);
}

.about-text p strong {
    color: var(--text-primary);
}

.about-highlights {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.highlight-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(0, 212, 255, 0.05);
    border-left: 3px solid var(--primary-cyan);
    border-radius: var(--radius-sm);
}

.highlight-icon {
    font-size: 2rem;
}

.highlight-text h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.highlight-text p {
    margin: 0;
    font-size: 0.95rem;
}

.about-stats {
    display: grid;
    gap: var(--spacing-md);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.skill-category {
    padding: var(--spacing-xl);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.skill-category h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.skill-items {
    display: grid;
    gap: var(--spacing-md);
}

.skill-item {
    display: grid;
    gap: var(--spacing-xs);
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.skill-info span:first-child {
    color: var(--text-primary);
    font-weight: 500;
}

.skill-percent {
    color: var(--primary-cyan);
    font-weight: 600;
}

.skill-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    width: 0;
    transition: width 1.5s var(--ease-smooth);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

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

.project-card {
    overflow: hidden;
    padding: 0;
    transition: all 0.4s var(--ease-smooth);
}

.project-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s var(--ease-smooth);
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, var(--bg-dark-card), transparent);
    opacity: 0.8;
}

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

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

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.tag {
    padding: 0.4rem 1rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--primary-cyan);
}

.project-link {
    display: inline-block;
    color: var(--accent-green);
    font-weight: 600;
    margin-top: var(--spacing-md);
    transition: all 0.3s var(--ease-smooth);
}

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

/* === Research Section === */
.research-content {
    padding: var(--spacing-2xl);
}

.research-intro {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.research-areas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.research-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: rgba(0, 212, 255, 0.05);
    border-radius: var(--radius-md);
    transition: all 0.3s var(--ease-smooth);
}

.research-item:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-5px);
}

.research-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.research-item h4 {
    color: var(--primary-cyan);
    margin-bottom: var(--spacing-sm);
}

/* === Timeline === */
.timeline {
    position: relative;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    height: 100%;
    width: 2px;
    background: var(--gradient-primary);
}

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

.timeline-dot {
    position: absolute;
    left: -38px;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--primary-cyan);
    border-radius: 50%;
    border: 3px solid var(--bg-dark);
    box-shadow: var(--shadow-glow-cyan);
}

.timeline-content {
    padding: var(--spacing-lg);
}

.timeline-date {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.timeline-content h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.timeline-content h4 {
    color: var(--primary-cyan);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

/* === Education Section === */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
}

.education-card {
    text-align: center;
}

.education-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.education-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.education-card h4 {
    color: var(--primary-cyan);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
}

.education-school {
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.education-period {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

/* === Services Section === */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    text-align: center;
    padding: var(--spacing-xl);
    transition: all 0.3s var(--ease-smooth);
}

.service-card:hover {
    background: rgba(0, 212, 255, 0.05);
}

.service-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

/* === Contact Section === */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-info h3 {
    margin-bottom: var(--spacing-md);
}

.contact-details {
    margin: var(--spacing-xl) 0;
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-icon {
    font-size: 2rem;
}

.contact-text h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
}

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

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

.social-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    transition: all 0.3s var(--ease-smooth);
}

.social-link svg {
    width: 24px;
    height: 24px;
    fill: var(--text-secondary);
    transition: all 0.3s var(--ease-smooth);
}

.social-link:hover {
    border-color: var(--primary-cyan);
    background: rgba(0, 212, 255, 0.1);
    box-shadow: var(--shadow-glow-cyan);
}

.social-link:hover svg {
    fill: var(--primary-cyan);
}

/* === Contact Form === */
.contact-form {
    padding: var(--spacing-xl);
}

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

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

.form-input {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all 0.3s var(--ease-smooth);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-cyan);
    background: rgba(0, 212, 255, 0.05);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-input::placeholder {
    color: var(--text-muted);
}

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

/* === Footer === */
.footer {
    background: var(--bg-dark-elevated);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-3xl);
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-logo p {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
}

.footer-links h4,
.footer-newsletter h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

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

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

.footer-links a {
    color: var(--text-secondary);
}

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

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.newsletter-input {
    flex: 1;
    padding: 0.8rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--primary-cyan);
}

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

.footer-bottom p {
    margin: var(--spacing-xs) 0;
    font-size: 0.9rem;
}

/* === Responsive Design === */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-avatar {
        margin: var(--spacing-xl) auto 0;
        width: 300px;
        height: 300px;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--bg-dark-card);
        flex-direction: column;
        padding: var(--spacing-3xl) var(--spacing-lg);
        transition: right 0.3s var(--ease-smooth);
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.5);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
}

@media (max-width: 640px) {
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .skills-grid,
    .projects-grid,
    .education-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-avatar {
        width: 250px;
        height: 250px;
    }
}