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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-card: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-inverse: #ffffff;
    --accent-primary: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #dbeafe;
    --border-color: #e5e7eb;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --nav-bg: rgba(255, 255, 255, 0.95);
    --tag-bg: #e5e7eb;
    --tag-text: #4b5563;
    --skill-bg: #f3f4f6;
    --footer-bg: #1f2937;
    --footer-text: #ffffff;
    --overlay-dark: rgba(0, 0, 0, 0.85);
    --hero-text: #ffffff;
}

[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-card: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-inverse: #1f2937;
    --accent-primary: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-light: #1e3a8a;
    --border-color: #374151;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
    --nav-bg: rgba(17, 24, 39, 0.95);
    --tag-bg: #374151;
    --tag-text: #d1d5db;
    --skill-bg: #374151;
    --footer-bg: #0f172a;
    --footer-text: #f9fafb;
    --overlay-dark: rgba(0, 0, 0, 0.9);
    --hero-text: #ffffff;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
}

h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 2rem;
    text-align: center;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent-primary);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.section {
    padding: 80px 0;
}

.section-light {
    background-color: var(--bg-primary);
}

.section-gray {
    background-color: var(--bg-secondary);
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: var(--text-inverse);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.3);
}

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

.btn-outline:hover {
    background-color: var(--accent-primary);
    color: var(--text-inverse);
    transform: translateY(-2px);
}

.navbar {
    position: sticky;
    top: 0;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px var(--shadow-color);
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--accent-primary);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background-color: var(--tag-bg);
}

.hero {
    padding: 60px 0;
    position: relative;
    background-image: url('https://avatars.mds.yandex.net/i?id=8c289312cc1752f718ddea1313a687b4_l-9181093-images-thumbs&n=13');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--hero-text);
    position: relative;
    z-index: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--overlay-dark);
    z-index: -1;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content h1 {
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    text-align: center;
}

.hero-image i {
    font-size: 20rem;
    color: rgba(255, 255, 255, 0.2);
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.2));
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.service-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px var(--shadow-color), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.service-icon {
    font-size: 3rem;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.service-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.service-card p {
    color: var(--text-secondary);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.portfolio-item {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: transform 0.3s, box-shadow 0.3s;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px var(--shadow-color), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.portfolio-image {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background-color: var(--bg-secondary);
    position: relative;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s ease;
    display: block;
}

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

.portfolio-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.portfolio-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.portfolio-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.5;
    flex-grow: 1;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
}

.portfolio-tags span {
    background: var(--tag-bg);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--tag-text);
    font-weight: 500;
}

a .portfolio-item {
    text-decoration: none;
    color: inherit;
}

a:hover .portfolio-item {
    text-decoration: none;
}

.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.status-badge {
    display: inline-block;
    background-color: var(--accent-light);
    color: var(--accent-primary);
    padding: 0.5rem 1rem;
    border-radius: 30px;
    font-weight: 600;
    margin: 1rem 0;
    border-left: 4px solid var(--accent-primary);
}

.skills {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.skills h3 {
    margin-bottom: 1.5rem;
    text-align: center;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.skill-item {
    background: var(--skill-bg);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    font-size: 1.25rem;
}

.contact-form {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

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

.footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 2rem 0;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.social-links a {
    font-size: 1.5rem;
    transition: color 0.3s;
}

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

@media (max-width: 768px) {
    .hero {
        background-attachment: scroll;
    }
    
    .hero .container,
    .about-wrapper,
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hero-image i {
        font-size: 12rem;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-image {
        height: 200px;
    }
}

.alert-success, .alert-error {
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-btn:hover {
    opacity: 1 !important;
}

#submitBtn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-loading {
    display: inline-block;
}

#formMessages {
    min-height: 60px;
}

        .alert-success {
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            background-color: #d4edda;
            border: 1px solid #c3e6cb;
            color: #155724;
        }
        .alert-error {
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            background-color: #f8d7da;
            border: 1px solid #f5c6cb;
            color: #721c24;
        }
        .close-btn {
            margin-left: auto;
            background: none;
            border: none;
            font-size: 1.25rem;
            cursor: pointer;
            color: inherit;
            opacity: 0.7;
        }
        .close-btn:hover {
            opacity: 1;
        }
        /* Чтобы кнопка в hero не теряла стили */
        .btn-outline {
            border-color: white; 
            color: white;
        }
        /* Чтобы ссылки в портфолио работали правильно */
        .portfolio-item a {
            text-decoration: none;
            color: inherit;
            display: block;
        }