:root {
    --primary-bg-color: #1a1a1a;
    --secondary-bg-color: #2e4d3d;
    --main-text-color: #ffffff;
    --accent-color: #ff5e1a;
    --button-bg: #ff6f2a;
    --button-hover-bg: #e85c1a;
    --font-main: 'Helvetica', sans-serif;
    --accordion-bg: #2e4d3d;
    --accordion-border: #3a5c4a;
    --yellow: #ffcc00;
    --yellow-hover: #ffe066;
    --btn-secondary: #3a5c4a;
}

body {
    font-family: var(--font-main);
    background: var(--primary-bg-color);
    color: var(--main-text-color);
    margin: 0;
    padding: 0;
    line-height: 1.7;
}

.site-header {
    background: var(--secondary-bg-color);
    padding: 1.2rem 0;
    position: sticky;
    top: 0;
    z-index: 1100;
}

.nav-section {
    max-width: 1250px;
    margin: 0 auto;
}

.navbar {
    padding: 0.6rem 1.2rem;
}

.navbar-brand.site-logo {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent-color);
    text-decoration: none;
}

.navbar-toggler.menu-toggle {
    border: none;
    color: var(--main-text-color);
}

.navbar-nav.menu-items {
    gap: 1.7rem;
}

.nav-item.menu-link {
    padding: 0.6rem;
}

.nav-link.scroll-link {
    color: var(--main-text-color);
    transition: color 0.4s ease;
}

.nav-link.scroll-link:hover {
    color: var(--accent-color);
}

.action-buttons {
    display: flex;
    gap: 1.2rem;
    justify-content: center;
}

.btn.primary-btn {
    background: var(--button-bg);
    color: var(--main-text-color);
    padding: 0.8rem 1.6rem;
    border-radius: 6px;
    text-decoration: none;
    transition: background 0.4s ease;
}

.btn.primary-btn:hover {
    background: var(--button-hover-bg);
}

.btn.secondary-btn {
    background: transparent;
    border: 1.2px solid var(--accent-color);
    color: var(--accent-color);
    padding: 0.8rem 1.6rem;
    border-radius: 6px;
    text-decoration: none;
    transition: background 0.4s ease;
}

.btn.secondary-btn:hover {
    background: var(--accent-color);
    color: var(--main-text-color);
}

.mobile-btn.btn.primary-btn {
    display: none;
}

.content-area {
    padding: 2.2rem 0;
}

.main-section {
    max-width: 1250px;
    margin: 0 auto;
}

.content-block {
    padding: 1.2rem;
}

.article-container {
    background: var(--secondary-bg-color);
    padding: 2.2rem;
    border-radius: 10px;
}

.site-footer {
    background: var(--secondary-bg-color);
    padding: 1.7rem 0;
    text-align: center;
}

.footer-links a {
    color: var(--main-text-color);
    text-decoration: none;
    font-size: 1.1rem;
}

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

.promo-block {
    position: fixed;
    bottom: 25px;
    right: 25px;
    background: var(--secondary-bg-color);
    border-radius: 12px;
    padding: 1.2rem;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.4);
}

.promo-content {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    text-decoration: none;
    color: var(--main-text-color);
}

.promo-image img {
    width: 55px;
    height: 55px;
    object-fit: cover;
}

.promo-text {
    font-size: 1.1rem;
    line-height: 1.3;
}

.promo-btn .primary-btn {
    font-size: 0.95rem;
    padding: 0.6rem 1.2rem;
}

@media (max-width: 991.98px) {
    .mobile-btn.btn.primary-btn {
        display: block;
        margin: 1.2rem auto;
        text-align: center;
    }

    .action-buttons {
        display: none;
    }

    .navbar-nav.menu-items {
        text-align: center;
    }
}

article {
    color: #fff;
}

article img {
    max-width: 100%;
}

.accordion {
    max-width: 850px;
    margin: 25px auto;
}

.accordion-item {
    background-color: var(--accordion-bg);
    border: 1.2px solid var(--accordion-border);
    border-radius: 8px;
    margin-bottom: 12px;
}

.accordion-header {
    background-color: var(--accordion-bg);
}

.accordion-button {
    background-color: var(--accordion-bg);
    color: var(--yellow);
    font-weight: 600;
    font-size: 1.1rem;
    padding: 16px;
    transition: all 0.4s ease;
}

.accordion-button:not(.collapsed) {
    background-color: var(--btn-secondary);
    color: var(--yellow-hover);
}

.accordion-button:focus {
    box-shadow: none;
    border-color: var(--yellow);
}

.accordion-body {
    background-color: var(--accordion-bg);
    color: var(--main-text-color);
    padding: 16px;
    font-size: 1rem;
}

@media (max-width: 991px) {
    .mobile-btn {
        display: block;
    }

    .action-buttons {
        text-align: center;
    }

    .action-buttons .btn {
        margin: 10px;
    }

    .promo-block {
        bottom: 12px;
        padding: 12px 16px;
    }

    .accordion {
        margin: 16px;
    }
}