html {
    scroll-behavior: smooth;
}

:root {
    --bg-color: #161616;
    --card-dark-bg: #212121;
    --primary-red: #E84C3D;
    --text-color: #FFFFFF;
    --text-secondary: #A3A3A3;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Montserrat', sans-serif;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}


.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}
.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}
.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--primary-red);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }


body.preloader-active {
    overflow: hidden;
}

.site-header,
.hero,
.about-section,
.interests-section,
.site-footer-main {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
body.loaded .site-header,
body.loaded .hero,
body.loaded .about-section,
body.loaded .interests-section,
body.loaded .site-footer-main {
    opacity: 1;
    transform: translateY(0);
}

body.loaded .hero h1 { transition-delay: 0.1s; }
body.loaded .hero p { transition-delay: 0.2s; }
body.loaded .hero .cta-button { transition-delay: 0.3s; }
body.loaded .about-section { transition-delay: 0.4s; }
body.loaded .interests-section { transition-delay: 0.5s; }
body.loaded .site-footer-main { transition-delay: 0.6s; }

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 60px;
    z-index: 100;
}
.logo { 
    font-size: 24px; 
    font-weight: 700; 
}
.main-nav { 
    display: flex; 
    gap: 30px; 
}
.main-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    transition: color 0.2s ease;
}
.main-nav a:hover { 
    color: var(--text-color); 
}

.hero {
    min-height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 80px 20px;
    overflow: hidden;
}
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}
.hero-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6); 
}
.hero-background video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.hero-content h1 {
    font-size: 68px;
    font-weight: 800;
    margin-bottom: 25px;
}
.hero-content p {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 720px;
    margin: 0 auto 40px;
}
.cta-button {
    display: inline-block;
    background-color: var(--primary-red);
    color: var(--text-color);
    text-decoration: none;
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 700;
    transition: all 0.2s ease;
}
.cta-button:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(232, 76, 61, 0.3);
}
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translate(-50%, 0); }
    40% { transform: translate(-50%, -10px); }
    60% { transform: translate(-50%, -5px); }
}

.about-section {
    padding: 120px 0;
    background-color: #121212;
}
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.about-text h2 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 20px;
}
.about-text p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
}
.about-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.feature-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background-color: var(--card-dark-bg);
    padding: 20px;
    border-radius: 12px;
}
.feature-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background-color: var(--primary-red);
    border-radius: 50%;
}
.feature-card h4 {
    font-size: 18px;
    margin-bottom: 5px;
}
.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.interests-section {
    padding: 100px 0;
    background-color: #121212;
    border-top: 1px solid #2a2a2a;
}
.interests-section h2 {
    font-size: 42px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 60px;
}
.tags-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}
.tag-card {
    position: relative;
    padding: 25px;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    background: var(--card-dark-bg);
    text-align: center;
    border: 2px solid transparent;
    background-clip: padding-box;
    transition: transform 0.3s ease;
    z-index: 1;
}
.tag-card::before {
    content: '';
    position: absolute;
    top: 0; right: 0; bottom: 0; left: 0;
    z-index: -1;
    margin: -2px;
    border-radius: inherit;
    background: linear-gradient(to right, var(--primary-red), #ff7e4f);
    opacity: 0;
    transition: opacity 0.4s ease-in-out;
}
.tag-card:hover {
    transform: translateY(-5px);
}
.tag-card:hover::before {
    opacity: 1;
}
.tag-card.accent {
    background: var(--primary-red);
    color: var(--text-color);
    border-color: var(--primary-red);
}
.tag-card.accent::before {
    display: none;
}

.site-footer-main {
    background-color: #121212;
    padding: 60px 0 30px 0;
    border-top: 1px solid #2a2a2a;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    margin-bottom: 50px;
}
.footer-text h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 10px;
}
.footer-text p {
    color: var(--text-secondary);
    max-width: 400px;
}
.footer-contacts {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 15px;
}
.contact-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 700;
    font-size: 18px;
    position: relative;
    transition: color 0.3s ease;
}
.contact-link::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--primary-red);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease-in-out;
}
.contact-link:hover {
    color: var(--primary-red);
}
.contact-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}
.footer-bottom {
    border-top: 1px solid #2a2a2a;
    padding-top: 30px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

@media (max-width: 768px) {
   
    .container {
        padding: 0 20px;
    }
    .site-header {
        padding: 20px;
    }
    .logo {
        font-size: 20px;
    }
    .main-nav {
        gap: 15px;
    }
    .main-nav a {
        font-size: 13px;
    }
    
    .hero-content h1 {
        font-size: 42px;
        line-height: 1.2;
    }
    .hero-content p {
        font-size: 16px;
    }

   
    .about-section {
        padding: 60px 20px;
    }
    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .about-text {
        margin-bottom: 40px;
    }
    .about-text h2 {
        font-size: 32px;
    }
    .feature-card {
        flex-direction: column;
        text-align: center;
    }

    .interests-section {
        padding: 60px 20px;
    }
    .interests-section h2 {
        font-size: 32px;
        margin-bottom: 40px;
    }

   
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    .footer-contacts {
        align-items: center;
    }
}