/* ===== CSS Variables ===== */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-dark: #1a202c;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #48bb78;
    --error-color: #f56565;
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --container-width: 1200px;
    
    /* Z-index scale */
    --z-nav: 1000;
    --z-nav-overlay: 999;
    
    /* Navigation dimensions */
    --nav-height: 73px;
}

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

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

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

body.menu-open {
    overflow: hidden;
}

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

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

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

/* ===== Container ===== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    background: var(--bg-white);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
}

.logo {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-image {
    height: 40px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.language-switcher {
    display: flex;
    gap: 8px;
    background: var(--bg-light);
    padding: 6px;
    border-radius: var(--radius-sm);
}

.lang-btn {
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-light);
    transition: var(--transition-base);
}

.lang-btn:hover {
    color: var(--primary-color);
}

.lang-btn.active {
    background: var(--bg-white);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 24px;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 16px;
    transition: all var(--transition-base);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

/* ===== Section Styles ===== */
section {
    padding: 100px 0;
}

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

.section-badge {
    display: inline-block;
    padding: 8px 16px;
    background: var(--bg-light);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 14px;
    border-radius: 20px;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-dark) 0%, var(--text-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: 18px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Hero Section ===== */
.hero {
    padding: 180px 0 120px;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 14px;
    border-radius: 20px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.hero-description {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 32px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
}

.hero-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-weight: 600;
    animation: float 3s ease-in-out infinite;
}

.floating-card .icon {
    font-size: 24px;
}

.floating-card.card-1 {
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.floating-card.card-2 {
    top: 50%;
    right: 5%;
    animation-delay: 1s;
}

.floating-card.card-3 {
    bottom: 15%;
    left: 10%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* ===== About Section ===== */
.about {
    background: var(--bg-white);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text {
    font-size: 18px;
    line-height: 1.8;
}

.about-text .lead {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 24px;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.skills {
    margin-top: 40px;
}

.skills h3 {
    font-size: 24px;
    margin-bottom: 20px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.skill-tag {
    padding: 10px 20px;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
    color: var(--text-dark);
    transition: var(--transition-base);
}

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

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.highlight-card {
    padding: 24px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    text-align: center;
}

.highlight-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.highlight-card h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.highlight-card p {
    font-size: 14px;
    color: var(--text-light);
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.project-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(30px);
}

.project-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.project-card.featured {
    grid-column: span 1;
}

.project-image {
    position: relative;
    height: 280px;
    overflow: hidden;
}

.project-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
}

.project-icon {
    font-size: 80px;
}

.project-tags {
    position: absolute;
    top: 20px;
    left: 20px;
    display: flex;
    gap: 8px;
}

.tag {
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-dark);
}

.project-content {
    padding: 32px;
}

.project-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 16px;
}

.project-description {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 24px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.project-tech span {
    padding: 6px 12px;
    background: var(--bg-light);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-dark);
}

.project-links {
    display: flex;
    gap: 16px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 600;
    transition: var(--transition-base);
}

.project-link:hover {
    gap: 12px;
}

/* ===== Services Section ===== */
.services {
    background: var(--bg-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    padding: 40px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    opacity: 0;
    transform: translateY(30px);
}

.service-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.service-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.service-card.highlight {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(240, 147, 251, 0.05));
    border-color: var(--primary-color);
}

.service-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    padding: 6px 12px;
    background: var(--primary-color);
    color: white;
    font-size: 12px;
    font-weight: 700;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.service-icon {
    margin-bottom: 24px;
}

.service-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.service-description {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 24px;
}

.service-features {
    list-style: none;
    margin-bottom: 24px;
}

.service-features li {
    padding: 10px 0;
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
    padding-left: 24px;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.service-link {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition-base);
}

.service-link:hover {
    gap: 8px;
}

/* ===== Hobby Section ===== */
.hobby {
    background: var(--bg-light);
}

.hobby-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
    opacity: 0;
    transform: translateY(30px);
}

.hobby-content.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.hobby-subtitle {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
}

.hobby-text p {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.hobby-features {
    display: flex;
    gap: 24px;
    margin-top: 32px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: white;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.feature-icon {
    font-size: 24px;
}

.hobby-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.gallery-item {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.gallery-item:first-child {
    grid-column: span 3;
}

.gallery-placeholder {
    height: 250px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    color: white;
}

.gallery-item:first-child .gallery-placeholder {
    height: 300px;
}

.gallery-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
    border-radius: var(--radius-md);
}

.gallery-icon {
    font-size: 48px;
}

.gallery-label {
    font-weight: 600;
    font-size: 18px;
}

.hobby-research {
    max-width: 900px;
    margin: 0 auto;
}

.research-card {
    padding: 60px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.research-icon {
    margin-bottom: 32px;
}

.research-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
}

.research-description {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 32px;
}

.research-topics {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.topic-tag {
    padding: 10px 20px;
    background: var(--bg-light);
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-dark);
}

/* ===== Contact Section ===== */
.contact {
    background: var(--bg-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-card {
    padding: 24px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    text-align: center;
}

.contact-card-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.contact-card h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.contact-card a {
    color: var(--primary-color);
    font-weight: 600;
}

.contact-card a:hover {
    text-decoration: underline;
}

.contact-card p {
    color: var(--text-light);
    font-size: 14px;
}

.contact-form-wrapper {
    background: white;
    padding: 48px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 24px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 16px;
    transition: var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

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

.form-message {
    margin-top: 16px;
    padding: 12px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-align: center;
    opacity: 0;
    transition: var(--transition-base);
}

.form-message.success {
    background: rgba(72, 187, 120, 0.1);
    color: var(--success-color);
    opacity: 1;
}

.form-message.error {
    background: rgba(245, 101, 101, 0.1);
    color: var(--error-color);
    opacity: 1;
}

/* ===== Footer ===== */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 16px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 16px;
    margin-bottom: 16px;
    color: white;
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: 12px;
    transition: var(--transition-base);
}

.footer-column a:hover {
    color: white;
    padding-left: 4px;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-content,
    .about-content,
    .contact-content,
    .hobby-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .image-wrapper {
        height: 400px;
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: white;
        flex-direction: column;
        padding: 32px 24px;
        box-shadow: var(--shadow-lg);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        overflow-y: auto;
        z-index: var(--z-nav-overlay);
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .nav-links a {
        padding: 16px 0;
        font-size: 18px;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links a:last-child {
        border-bottom: none;
    }
    
    .nav-links a::after {
        display: none;
    }
    
    .language-switcher {
        flex-wrap: wrap;
    }
    
    .container {
        padding: 0 16px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .hero {
        padding: 140px 0 80px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 24px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .stat {
        width: 100%;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .section-description {
        font-size: 16px;
    }
    
    .about-highlights {
        gap: 16px;
    }
    
    .highlight-card {
        padding: 20px;
    }
    
    .project-image {
        height: 220px;
    }
    
    .service-card {
        padding: 32px 24px;
    }
    
    .hobby-features {
        flex-direction: column;
        gap: 12px;
    }
    
    .feature-item {
        width: 100%;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .contact-form-wrapper {
        padding: 32px 24px;
    }
    
    .contact-info {
        gap: 16px;
    }
    
    .contact-card {
        padding: 20px;
    }
    
    .hobby-gallery {
        grid-template-columns: 1fr;
    }
    
    .gallery-item:first-child {
        grid-column: span 1;
    }
    
    .research-card {
        padding: 40px 24px;
    }
    
    .research-topics {
        gap: 8px;
    }
    
    .topic-tag {
        font-size: 13px;
        padding: 8px 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
    
    .nav-content {
        padding: 16px 0;
    }
    
    .logo {
        font-size: 24px;
    }
    
    .language-switcher {
        padding: 4px;
        gap: 4px;
    }
    
    .lang-btn {
        padding: 4px 8px;
        font-size: 13px;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-description {
        font-size: 15px;
    }
    
    .hero-badge {
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .hero-buttons .btn {
        padding: 12px 20px;
        font-size: 15px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .stat-label {
        font-size: 13px;
    }
    
    .section-badge {
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .section-description {
        font-size: 15px;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    section {
        padding: 50px 0;
    }
    
    .about-text {
        font-size: 16px;
    }
    
    .about-text .lead {
        font-size: 20px;
    }
    
    .skill-tag {
        font-size: 13px;
        padding: 8px 16px;
    }
    
    .project-content,
    .service-card {
        padding: 24px 20px;
    }
    
    .project-title {
        font-size: 22px;
    }
    
    .project-description {
        font-size: 15px;
    }
    
    .project-image {
        height: 200px;
    }
    
    .service-title {
        font-size: 20px;
    }
    
    .service-description {
        font-size: 15px;
    }
    
    .service-features li {
        font-size: 14px;
    }
    
    .hobby-subtitle {
        font-size: 24px;
    }
    
    .hobby-text p {
        font-size: 16px;
    }
    
    .research-title {
        font-size: 24px;
    }
    
    .research-description {
        font-size: 16px;
    }
    
    .gallery-placeholder {
        height: 200px;
    }
    
    .gallery-item:first-child .gallery-placeholder {
        height: 250px;
    }
    
    .contact-form-wrapper {
        padding: 24px 20px;
    }
    
    .form-group input,
    .form-group textarea {
        font-size: 15px;
        padding: 12px 14px;
    }
    
    .footer {
        padding: 50px 0 24px;
    }
    
    .floating-card {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .floating-card .icon {
        font-size: 20px;
    }
    
    .image-wrapper {
        height: 350px;
    }
}