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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: var(--space-md);
    font-weight: 700;
    line-height: 1.3;
}

h1 {
    font-size: var(--font-size-xxl);
    max-width: 800px;
    margin-bottom: var(--space-lg);
    background: linear-gradient(90deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-xl);
    text-align: center;
}

h3 {
    font-size: var(--font-size-lg);
}

p {
    margin-bottom: var(--space-md);
}

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

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

ul {
    list-style-position: inside;
    margin-bottom: var(--space-md);
}

section {
    padding: var(--space-xxl) 0;
    position: relative;
}

section:not(.hero)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
}

.section-title {
    position: relative;
    display: inline-block;
    margin: 0 auto var(--space-xl);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--accent-primary);
}

.microcopy {
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-lg);
    max-width: 700px;
}

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

.hero h1 {
    animation: fadeInUp 0.6s ease-out forwards;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    font-size: var(--font-size-md);
}

.btn-primary {
    background-color: var(--accent-primary);
    color: #FFFFFF;
}

.btn-primary:hover {
    background-color: var(--accent-primary-hover);
    transform: translateY(-2px);
    color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(102, 217, 239, 0.3);
}

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

.btn-secondary:hover {
    background-color: rgba(102, 217, 239, 0.1);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: var(--font-size-lg);
}

.btn-link {
    color: var(--accent-primary);
    background: none;
    padding: var(--space-sm) 0;
    border: none;
    position: relative;
    font-weight: 600;
}

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

.btn-link:hover::after {
    width: 100%;
}

.btn-link i {
    margin-left: var(--space-sm);
    transition: transform var(--transition-normal);
}

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

.nav-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) 0;
    position: relative;
}

.nav-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-links {
    display: flex;
    gap: var(--space-md);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) 0;
}

.logo-img {
    height: 64px;
    margin-top: 1rem;
}

.header {
    padding-top: var(--radius-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;  /* по горизонтали */
    justify-content: center;  /* по вертикали, если нужно */
}


.subtitle {
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-xl);
}

.blog-list {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
    padding-bottom: var(--space-xxl);
}

.blog-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
    transition: all var(--transition-normal);
    border: 1px solid rgba(102, 217, 239, 0.1);
}

.blog-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.blog-link {
    display: block;
    padding: var(--space-xl);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: color var(--transition-fast);
}

.blog-link:hover {
    color: var(--accent-primary);
}

@media (max-width: 768px) {
    .nav-flex {
        position: relative;
    }

    .nav-center {
        position: static;
        transform: none;
        margin-right: auto;
    }

    .nav-side {
        display: none;
    }

    .nav-links {
        margin-left: auto;
    }

    .header h1 {

        font-size: var(--font-size-xl);
    }

    .subtitle {
        font-size: var(--font-size-xs);
    }

    .blog-link {
        font-size: var(--font-size-xs);
    }
}

footer {
    background-color: var(--bg-primary);
    padding: var(--space-xl) 0 var(--space-lg);
    border-top: 1px solid var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-xl);
    margin-bottom: var(--space-lg);
}

.footer-column {
    flex: 1;
    min-width: 200px;
}

.footer-column h3 {
    color: var(--text-primary);
    font-size: var(--font-size-md);
    margin-bottom: var(--space-md);
}

.footer-column ul {
    list-style: none;
    padding: 0;
}



.footer-column ul li {
    margin-bottom: var(--space-sm);
}

.footer-column ul li a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-column ul li a:hover {
    color: var(--accent-primary);
}

.social-icons {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-sm);
}

.social-icons a {
    font-size: 1.5rem;
    color: var(--accent-primary);
    transition: transform 0.2s ease;
}

.social-icons a:hover {
    transform: scale(1.2);
    color: var(--accent-primary-hover);
}

.certification-badges {
    margin-top: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.certification-badges .badge {
    background-color: var(--bg-tertiary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-weight: 600;
    color: var(--text-primary);
    width: fit-content;
    font-size: var(--font-size-xs);
    box-shadow: var(--shadow-sm);
}

.copyright {
    text-align: center;
    border-top: 1px solid var(--bg-tertiary);
    padding-top: var(--space-sm);
    color: var(--text-muted);
}

/* .theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.theme-toggle .icon {
    stroke: var(--accent-primary);
    transition: stroke 0.3s ease;
}

.theme-toggle .sun,
.theme-toggle .sun-rays {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.theme-toggle .moon {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

body.light-theme .sun,
body.light-theme .sun-rays {
    opacity: 1;
    transform: scale(1);
}

body.light-theme .moon {
    opacity: 0;
    transform: scale(0.8);
}

body.dark-theme .sun,
body.dark-theme .sun-rays {
    opacity: 0;
    transform: scale(0.8);
}

body.dark-theme .moon {
    opacity: 1;
    transform: scale(1);
} */

@media (min-width: 768px) and (max-width: 991px){
    .container .nav-center{
        left: 15%;
    }
}

@media (max-width: 768px) {
    .logo-img {
        height: 48px;
        margin-top: 0;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    .nav-links {
        order: 2;
        flex-direction: column;
        gap: var(--space-sm);
        width: 100%;
        text-align: center;
    }

    /* Footer Mobile */
    .footer-content {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }

    .footer-column {
        width: 100%;
        min-width: auto;
    }

    .footer-column h3 {
        font-size: var(--font-size-md);
    }

    .social-icons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }
}