/* ====== Общие стили ====== */
body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f0f4f8, #e9eef3);
    margin: 0;
    padding: 0;
    color: #2c3e50;
}


.container {
    max-width: 1000px;
    margin: 50px auto;
    background: #fff;
    padding: 30px 40px;
    border-radius: 16px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

h1 {
    font-size: 2.4rem;
    color: #1a202c;
    margin-bottom: 10px;
    text-align: center;
}

h2 {
    margin-top: 40px;
    font-size: 1.8rem;
    color: #2b6cb0;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 8px;
}


a.btn {
    display: inline-block;
    padding: 12px 20px;
    margin: 12px 8px 20px 0;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

a.btn-primary {
    background: #3182ce;
    color: #fff;
}
a.btn-primary:hover {
    background: #2b6cb0;
    transform: translateY(-2px);
}

a.btn-success {
    background: #38a169;
    color: #fff;
}
a.btn-success:hover {
    background: #2f855a;
    transform: translateY(-2px);
}

ul {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    list-style: none;
    padding: 0;
    margin-top: 20px;
}

ul li {
    background: #ffffff;
    padding: 18px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

ul li:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

ul li a {
    display: inline-block;
    color: #3182ce;
    font-weight: 600;
    text-decoration: none;
    margin-bottom: 6px;
    position: relative;
    transition: color 0.3s ease;
}

ul li a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -3px;
    width: 0;
    height: 2px;
    background: #3182ce;
    transition: width 0.3s ease;
    border-radius: 2px;
}

ul li a:hover {
    color: #2b6cb0;
}

ul li a:hover::after {
    width: 100%;
}

ul li a:last-child {
    font-size: 0.9rem;
    font-weight: 500;
    color: #4a5568;
}

ul li a:last-child:hover {
    color: #2d3748;
}
.nav-bar {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    padding: 10px;
    background: white;
}

nav {
    display: flex;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 15px;
}
a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

a:hover {
    color: #3498db;
}