/* ================================
   VARIABLES & THEME
   ================================ */

:root {
    /* Colors */
    --bg-primary: #0f1419;
    --bg-secondary: #1a202c;
    --bg-tertiary: #2d3748;
    --text-primary: #f7fafc;
    --text-secondary: #cbd5e0;
    --accent-primary: #4a90e2;
    --accent-secondary: #357abd;
    --accent-tertiary: #c0d9f5;
    --border-color: #2d3748;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-serif: 'Palatino', 'Palatino Linotype', serif;
    --font-mono: 'Space Mono', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.35s ease;
    --transition-slow: 0.5s ease;
}

/* ================================
   GLOBAL STYLES
   ================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    background: linear-gradient(135deg, #0f1419 0%, #1a2335 50%, #0d1117 100%);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(74, 144, 226, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(53, 122, 189, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

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

/* ================================
   TYPOGRAPHY
   ================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

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

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

/* ================================
   BUTTONS
   ================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    border: 2px solid transparent;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
    width: 100%;
    margin-top: var(--spacing-md);
}

.btn-primary {
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    color: white;
    border-color: transparent;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(74, 144, 226, 0.4);
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
}

/* ================================
   NAVBAR
   ================================ */

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 20, 25, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    color: white;
    font-family: var(--font-serif);
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 700;
    display: none;
}

@media (min-width: 768px) {
    .logo-text {
        display: block;
    }
}

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

.nav-link {
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-fast);
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    .hamburger {
        display: flex;
    }
}

/* ================================
   HERO SECTION
   ================================ */

.hero {
    padding: var(--spacing-2xl) 0;
    min-height: 85vh;
    display: flex;
    align-items: center;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-content h1 {
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.3s both;
}

.gradient-text {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.5s both;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.6s both;
    flex-wrap: wrap;
}

.social-icons {
    display: flex;
    gap: var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.7s both;
}

.social-link {
    width: 50px;
    height: 50px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all var(--transition-fast);
    color: var(--text-primary);
}

.social-link:hover {
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    border-color: transparent;
    color: white;
    transform: translateY(-5px);
}

.hero-visual {
    position: relative;
    height: 400px;
    display: none;
}

@media (min-width: 1024px) {
    .hero-visual {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

.hero-image {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 16px;
    overflow: hidden;
    border: 2px solid var(--border-color);
    box-shadow: 0 20px 60px rgba(74, 144, 226, 0.2);
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.hero-image:hover .hero-img {
    transform: scale(1.05);
}

.floating-card {
    position: absolute;
    width: 150px;
    height: 150px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    animation: float 3s ease-in-out infinite;
}

.card-1 {
    top: 0;
    right: 0;
    animation-delay: 0s;
}

.card-2 {
    top: 150px;
    right: 120px;
    animation-delay: 0.5s;
}

.card-3 {
    bottom: 50px;
    right: 30px;
    animation-delay: 1s;
}

.card-label {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-align: center;
    color: var(--accent-primary);
}

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

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

/* ================================
   ABOUT SECTION
   ================================ */

.about {
    padding: var(--spacing-2xl) 0;
    background: rgba(26, 35, 53, 0.3);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

.about-text p {
    font-size: 1.05rem;
    line-height: 1.8;
}

.skills-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.skill-category h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

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

.tag {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
    transform: translateY(-3px);
}

.tag.accent {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

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

/* ================================
   ACHIEVEMENTS SECTION
   ================================ */

.achievements {
    padding: var(--spacing-2xl) 0;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.achievement-card {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.15) 0%, rgba(53, 122, 189, 0.15) 100%);
    border: 2px solid var(--border-color);
    padding: var(--spacing-lg);
    border-radius: 16px;
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.achievement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.3) 0%, transparent 100%);
    transition: left var(--transition-normal);
}

.achievement-card:hover::before {
    left: 100%;
}

.achievement-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(74, 144, 226, 0.3);
}

.medal-container {
    width: 100%;
    margin-bottom: 15px;
}

.medal-photo {
    width: 100%;
    height: 180px; 
    object-fit: contain; /* Чтобы сертификат был виден целиком */
    background-color: #f8fafc; /* Светлый фон для пустых мест по бокам */
}

.card-img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.medal-photo:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.medal-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    border-radius: 50%;
    transition: all var(--transition-normal);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.medal-icon:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.medal-icon.gold {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #78350f;
}

.medal-icon.silver {
    background: linear-gradient(135deg, #e5e7eb 0%, #d1d5db 100%);
    color: #374151;
}

.medal-icon.bronze {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    color: white;
}

.achievement-card h3 {
    margin-bottom: var(--spacing-sm);
}

.achievement-card p {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-xs);
}

.meta {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ================================
   FEATURED PROJECTS
   ================================ */

.featured-projects {
    padding: var(--spacing-2xl) 0;
    background: rgba(26, 35, 53, 0.3);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.projects-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.project-preview-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    border-radius: 12px;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.project-preview-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(74, 144, 226, 0.2);
}

.project-card-image {
    width: calc(100% + 2 * var(--spacing-lg));
    margin: calc(-1 * var(--spacing-lg)) calc(-1 * var(--spacing-lg)) var(--spacing-lg) calc(-1 * var(--spacing-lg));
    height: 200px;
    border-radius: 12px 12px 0 0;
    overflow: hidden;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.project-preview-card:hover .card-img {
    transform: scale(1.05);
}

.project-badge {
    display: inline-block;
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.project-preview-card h3 {
    margin-bottom: var(--spacing-sm);
}

.project-preview-card p {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.tech-stack span {
    background: var(--bg-tertiary);
    padding: 0.3rem 0.7rem;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--accent-primary);
    font-family: var(--font-mono);
}

.project-link {
    color: var(--accent-primary);
    font-weight: 600;
    font-family: var(--font-mono);
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
}

.project-link:hover {
    gap: 0.5rem;
}

.view-all-projects {
    text-align: center;
}

/* ================================
   PROJECTS PAGE
   ================================ */

.projects-header {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1) 0%, rgba(53, 122, 189, 0.1) 100%);
    border-bottom: 1px solid var(--border-color);
}

.projects-header h1 {
    margin-bottom: var(--spacing-md);
}

.projects-section {
    padding: var(--spacing-2xl) 0;
}

.project-item {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--border-color);
}

.project-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.project-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

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

.project-image {
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    transition: all var(--transition-normal);
}

.project-image:hover .project-img {
    transform: scale(1.05);
    filter: brightness(0.8);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.overlay-label {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.project-header h2 {
    margin: var(--spacing-sm) 0;
}

.project-year {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    width: fit-content;
}

.project-tag.ml {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.2) 0%, rgba(53, 122, 189, 0.2) 100%);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

.project-tag.robotics {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.2) 0%, rgba(192, 217, 245, 0.2) 100%);
    color: #4a90e2;
    border: 1px solid #4a90e2;
}

.project-tag.cv {
    background: linear-gradient(135deg, rgba(53, 122, 189, 0.2) 0%, rgba(74, 144, 226, 0.2) 100%);
    color: #357abd;
    border: 1px solid #357abd;
}

.project-tag.engineering {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.2) 0%, rgba(53, 122, 189, 0.2) 100%);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

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

.project-tech {
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.project-tech h4 {
    margin-bottom: var(--spacing-md);
}

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

.tech-badge {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
    border: 1px solid var(--accent-primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--accent-primary);
    font-family: var(--font-mono);
}

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

.project-link-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    color: white;
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.project-link-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(74, 144, 226, 0.3);
}

/* ================================
   MORE PROJECTS
   ================================ */

.more-projects {
    padding: var(--spacing-2xl) 0;
    background: rgba(26, 35, 53, 0.3);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.mini-projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.mini-project {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    transition: all var(--transition-normal);
}

.mini-project:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
}

.mini-project h3 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
}

.mini-project i {
    color: var(--accent-primary);
}

.mini-project p {
    font-size: 0.95rem;
}

/* ================================
   CONTACT PAGE
   ================================ */

.contact-header {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1) 0%, rgba(53, 122, 189, 0.1) 100%);
    border-bottom: 1px solid var(--border-color);
}

.contact-header h1 {
    margin-bottom: var(--spacing-md);
}

.contact-section {
    padding: var(--spacing-2xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

@media (max-width: 968px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

.contact-form-wrapper {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-xl);
    border-radius: 12px;
}

.contact-form-wrapper h2 {
    margin-bottom: var(--spacing-lg);
    font-size: 1.8rem;
}

.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[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.radio-label:hover {
    color: var(--text-primary);
}

.radio-label input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

.checkbox-group {
    margin-top: var(--spacing-lg);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: 8px;
    text-align: center;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.form-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.contact-info-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contact-info-box,
.social-box,
.response-time-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    border-radius: 12px;
}

.contact-info-box h3,
.social-box h3 {
    margin-bottom: var(--spacing-lg);
    font-size: 1.3rem;
}

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

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

.info-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.2) 0%, rgba(53, 122, 189, 0.2) 100%);
    border-radius: 8px;
    color: var(--accent-primary);
    font-size: 1.3rem;
    flex-shrink: 0;
}

.info-content {
    flex: 1;
}

.info-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

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

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

.social-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all var(--transition-normal);
    color: var(--text-primary);
}

.social-card:hover {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.2) 0%, rgba(53, 122, 189, 0.2) 100%);
    border-color: var(--accent-primary);
    transform: translateY(-5px);
}

.social-card i {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-primary);
}

.social-card span {
    font-size: 0.85rem;
    font-weight: 600;
}

.response-time-box {
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1) 0%, rgba(53, 122, 189, 0.1) 100%);
    border: 1px solid var(--accent-primary);
}

.response-time-box p {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
}

.response-time-box i {
    color: var(--accent-primary);
    font-size: 1.2rem;
}

/* ================================
   CTA SECTION
   ================================ */

.cta-section {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.15) 0%, rgba(53, 122, 189, 0.15) 100%);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.cta-section h2 {
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-section p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

/* ================================
   FOOTER
   ================================ */

.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border-color);
    background: rgba(15, 20, 25, 0.5);
    margin-top: var(--spacing-2xl);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

@media (max-width: 768px) {
    .footer .container {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

/* ================================
   RESPONSIVE
   ================================ */

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.3rem; }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .hero {
        min-height: auto;
        padding: var(--spacing-xl) 0;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-large {
        width: 100%;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-2xl: 2.5rem;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .social-icons {
        flex-wrap: wrap;
    }
}
/* Фикс для вертикального видео в проектах */
.prosthetic-media-container {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.prosthetic-media-container video {
    max-height: 400px; /* Ограничиваем высоту вертикального видео */
    width: auto;
    border-radius: 12px;
    border: 1px solid #334155;
}

.prosthetic-media-container .project-img-small {
    width: 50%;
    object-fit: cover;
    border-radius: 12px;
}

@media (max-width: 768px) {
    .prosthetic-media-container {
        flex-direction: column;
    }
    .prosthetic-media-container .project-img-small {
        width: 100%;
    }
}

body { font-size: 1rem; }

/* Пункт 16: Visited ссылки выглядят иначе для контраста */
a:visited {
    color: var(--accent-tertiary);
    opacity: 0.8;
}

/* Пункт 18: Ссылки в текстовых блоках должны быть подчеркнуты (навсегда) */
.about-text p a, .project-description p a {
    text-decoration: underline;
}

/* Пункт 19: СТИЛИ ДЛЯ ПЕЧАТИ (ОБЯЗАТЕЛЬНО) */
@media print {
    /* Скрываем всё лишнее: меню, кнопки, видео, иконки */
    .navbar, .btn, .social-icons, .footer, .hamburger, .hero-cta, video, .project-links {
        display: none !important;
    }
    body {
        background: white !important;
        color: black !important;
    }
    .container {
        width: 100% !important;
        max-width: none !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    h1, h2, h3 { color: black !important; }
    p { color: #333 !important; }
    /* Показываем ссылки в виде текста рядом с ними */
    a:after { content: " (" attr(href) ")"; font-size: 0.8rem; }
}

/* Стили для таблицы из Пункта 4 */
table th { font-family: var(--font-mono); background-color: var(--bg-tertiary); }
table td { border: 1px solid var(--border-color); }



CSS
/* ================================
   PREMIUM TABLE DESIGN (ELTE CRITERIA)
   ================================ */

/* Стиль самого спойлера */
details.project-metrics {
    margin: var(--spacing-xl) 0;
    background: rgba(26, 32, 44, 0.4); /* Полупрозрачный фон */
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition-normal);
}

details.project-metrics[open] {
    border-color: var(--accent-primary);
    box-shadow: 0 10px 30px rgba(74, 144, 226, 0.1);
}

/* Кнопка-заголовок */
summary.metrics-title {
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-primary);
    list-style: none; /* Убираем стандартную стрелочку */
    display: flex;
    align-items: center;
    gap: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

summary.metrics-title::before {
    content: '→';
    transition: transform 0.3s ease;
}

details[open] summary.metrics-title::before {
    transform: rotate(90deg);
}

/* Сама таблица */
.table-container {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    overflow-x: auto;
}

.styled-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.styled-table caption {
    padding: 15px;
    font-family: var(--font-serif);
    color: var(--text-secondary);
    font-style: italic;
    text-align: left;
}

.styled-table th {
    background: rgba(74, 144, 226, 0.1);
    color: var(--text-primary);
    text-align: left;
    padding: 12px 15px;
    border-bottom: 2px solid var(--accent-primary);
}

.styled-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.styled-table tr:hover td {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.styled-table tr:last-child td {
    border-bottom: none;
}


:root {
    --bg-primary: #0f1419;
    --bg-secondary: #1a202c;
    --accent-primary: #4a90e2;
    --text-primary: #f7fafc;
    --border-color: #2d3748;
    --font-mono: 'Space Mono', monospace;
    --spacing-lg: 2rem;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: var(--bg-primary); color: var(--text-primary); font-family: sans-serif; line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); }

/* НАВИГАЦИЯ И ГЛАВНОЕ */
.navbar { position: sticky; top: 0; z-index: 1000; background: rgba(15, 20, 25, 0.9); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); padding: 1rem 0; }
.nav-wrapper { display: flex; justify-content: space-between; align-items: center; max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); }

/* СТИЛЬ ТАБЛИЦЫ ДЛЯ ПУНКТА 4 */
.project-metrics { margin: 2rem 0; background: var(--bg-secondary); padding: 1rem; border-radius: 12px; border: 1px solid var(--border-color); }
.metrics-title { cursor: pointer; font-family: var(--font-mono); color: var(--accent-primary); font-weight: bold; }
.styled-table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
.styled-table th, .styled-table td { padding: 12px; border: 1px solid var(--border-color); text-align: left; }
.styled-table th { background: rgba(74, 144, 226, 0.1); }

/* СТИЛИ ДЛЯ ПЕЧАТИ (ПУНКТ 19) */
@media print {
    .navbar, .btn, .social-icons, .footer, .hamburger, .hero-cta, video, .project-links { display: none !important; }
    body { background: white !important; color: black !important; }
    .container { width: 100% !important; max-width: none !important; }
}

.prosthetic-media-container video { max-height: 400px; width: auto; border-radius: 12px; border: 1px solid #334155; }


.hero { padding: 4rem 0; display: flex; align-items: center; }
.gradient-text { background: linear-gradient(135deg, #10b981 0%, #059669 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.project-preview-card { background: var(--bg-secondary); border: 1px solid var(--border-color); padding: 1.5rem; border-radius: 12px; margin-bottom: 1rem; }
.achievement-card { background: rgba(74, 144, 226, 0.1); border: 1px solid var(--border-color); padding: 1.5rem; border-radius: 12px; text-align: center; }
.medal-photo { width: 100%; height: 180px; object-fit: contain; }
.btn { padding: 0.75rem 1.5rem; border-radius: 8px; font-weight: bold; text-transform: uppercase; cursor: pointer; }
.btn-primary { background: var(--accent-primary); color: white; border: none; }


a:visited { color: #a0aec0; } 
.about-text p a { text-decoration: underline; } 



.project-tech {
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-top: var(--spacing-md);
}

.project-tech h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

.tech-badge {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.15) 0%, rgba(53, 122, 189, 0.15) 100%);
    border: 1px solid var(--accent-primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--accent-primary);
    font-family: var(--font-mono);
    text-transform: none; /* Чтобы названия языков были как в коде */
}

/* 2. СТИЛИЗАЦИЯ ТАБЛИЦЫ (Для пункта №4) */
details.project-metrics {
    margin: var(--spacing-xl) 0;
    background: rgba(26, 32, 44, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

summary.metrics-title {
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.styled-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.styled-table th, .styled-table td {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.styled-table th {
    background: rgba(74, 144, 226, 0.1);
    color: var(--text-primary);
}

/* 3. ОБЯЗАТЕЛЬНЫЕ КРИТЕРИИ ELTE (Visited links & Print) */
a:visited {
    color: var(--accent-tertiary); /* Пункт №16: Визуальное отличие */
    opacity: 0.8;
}

.project-description p a {
    text-decoration: underline; /* Пункт №18: Подчеркивание ссылок */
}

/* СТИЛИ ДЛЯ ПЕЧАТИ (Пункт №19) */
@media print {
    .navbar, .btn, .social-icons, .footer, .hamburger, .hero-cta, video, .project-links {
        display: none !important;
    }
    body {
        background: white !important;
        color: black !important;
    }
    .container {
        width: 100% !important;
        max-width: none !important;
        padding: 0 !important;
    }
    h1, h2, h3 { color: black !important; }
    p { color: #333 !important; }
}