:root {
    --primary-color: #007bff;
    --secondary-color: #ffc107;
    --accent-color: #28a745;
    --text-color: #333;
    --white-color: #fff;
    --dark-grey: #222;
    --light-grey: #f8f9fa;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-strong: rgba(0, 0, 0, 0.25);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding-top: 80px;
    line-height: 1.6;
    color: var(--text-color);
    direction: ltr;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 60px;
    background-color: var(--dark-grey);
    box-shadow: 0 4px 12px var(--shadow-strong);
    z-index: 1000;
    color: var(--white-color);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.header-main-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    min-height: 60px;
    box-sizing: border-box;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: var(--secondary-color);
    text-decoration: none;
    padding: 0 15px;
    transition: color 0.3s ease;
}
.logo:hover {
    color: var(--primary-color);
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 25px;
}

.main-nav a {
    color: var(--white-color);
    text-decoration: none;
    font-size: 17px;
    font-weight: 600;
    padding: 5px 0;
    position: relative;
    transition: color 0.3s ease;
}
.main-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -3px;
    width: 0;
    height: 3px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}
.main-nav a:hover, .main-nav a.active {
    color: var(--primary-color);
}
.main-nav a:hover::after, .main-nav a.active::after {
    width: 100%;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px var(--shadow-light);
    border: none;
    color: var(--white-color);
}

.btn-primary {
    background-color: var(--primary-color);
    box-shadow: 0 0 15px rgba(0, 123, 255, 0.5);
}
.btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(0, 123, 255, 0.7);
}

.btn-secondary {
    background-color: var(--secondary-color);
    box-shadow: 0 0 15px rgba(255, 193, 7, 0.5);
}
.btn-secondary:hover {
    background-color: #e0a800;
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(255, 193, 7, 0.7);
}

.btn-accent {
    background-color: var(--accent-color);
    box-shadow: 0 0 15px rgba(40, 167, 69, 0.5);
}
.btn-accent:hover {
    background-color: #218838;
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(40, 167, 69, 0.7);
}

.desktop-buttons {
    display: flex;
    gap: 15px;
}

.hamburger-menu {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 24px;
    position: relative;
    z-index: 1001;
}

.hamburger-menu .bar {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--white-color);
    margin: 6px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.mobile-buttons-row {
    display: none;
}

.site-footer {
    background-color: var(--dark-grey);
    color: var(--light-grey);
    padding: 40px 20px 20px;
    font-size: 15px;
    line-height: 1.8;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto 30px;
    gap: 30px;
}

.footer-col {
    flex: 1;
    min-width: 250px;
    margin-bottom: 20px;
}

.footer-col h3 {
    color: var(--secondary-color);
    font-size: 19px;
    margin-bottom: 15px;
    position: relative;
}
.footer-col h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -5px;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-col p {
    margin-bottom: 10px;
}

.footer-col a {
    color: var(--light-grey);
    text-decoration: none;
    transition: color 0.3s ease;
}
.footer-col a:hover {
    color: var(--primary-color);
}

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

.footer-nav li {
    margin-bottom: 8px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-bottom p {
    margin: 0;
    color: rgba(255, 255, 255, 0.7);
}

@media (max-width: 1024px) {
    .main-nav {
        gap: 15px;
    }
    .main-nav a {
        font-size: 16px;
    }
    .logo {
        font-size: 26px;
    }
}

@media (max-width: 768px) {
    body {
        padding-top: 120px;
    }

    .site-header {
        min-height: auto;
    }

    .header-main-row {
        justify-content: space-between;
        padding: 10px 15px;
        min-height: 60px;
    }

    .hamburger-menu {
        display: block;
    }

    .logo {
        flex-grow: 1;
        text-align: center;
        font-size: 24px;
        padding: 0;
        order: 2;
    }

    .hamburger-menu {
        order: 1;
    }
    .desktop-buttons {
        display: none;
        order: 3;
        visibility: hidden;
        width: 30px;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--dark-grey);
        box-shadow: 0 8px 16px var(--shadow-strong);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease-out, padding 0.3s ease-out;
        z-index: 999;
        padding: 0 20px;
        box-sizing: border-box;
    }

    .main-nav.active {
        max-height: 500px;
        padding: 15px 20px;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .main-nav a {
        display: block;
        width: 100%;
        padding: 10px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .main-nav li:last-child a {
        border-bottom: none;
    }
    .main-nav a::after {
        display: none;
    }

    .hamburger-menu.active .bar:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }
    .hamburger-menu.active .bar:nth-child(2) {
        opacity: 0;
    }
    .hamburger-menu.active .bar:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .mobile-buttons-row {
        display: flex;
        justify-content: center;
        gap: 10px;
        padding: 10px 15px;
        background-color: var(--dark-grey);
        box-shadow: 0 2px 8px var(--shadow-strong);
        z-index: 998;
        position: relative;
        width: 100%;
        box-sizing: border-box;
    }
    .mobile-buttons-row .btn {
        flex: 1;
        max-width: 120px;
        font-size: 14px;
        padding: 8px 15px;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-col {
        min-width: unset;
        width: 100%;
        margin-bottom: 30px;
    }
    .footer-col h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 22px;
    }
    .mobile-buttons-row .btn {
        font-size: 13px;
        padding: 7px 10px;
    }
}