:root {
    --primary: #1a3a5f;
    --secondary: #e63946;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--light);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-header {
    background-color: var(--primary);
    color: white;
    padding: 18px 0;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
    text-decoration: none;
    font-size: 1.35rem;
    font-weight: bold;
}

.brand img {
    width: 44px;
    height: 44px;
    border-radius: 6px;
    background-color: white;
}

.header-phone {
    background-color: var(--secondary);
    color: white;
    text-decoration: none;
    padding: 9px 18px;
    border-radius: 30px;
    font-weight: bold;
    white-space: nowrap;
}

.header-phone:hover {
    background-color: #d62828;
}

main {
    flex: 1;
    padding: 50px 0;
}

.page-card {
    background-color: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
    max-width: 850px;
    margin: 0 auto;
}

h1 {
    color: var(--primary);
    font-size: 2.1rem;
    line-height: 1.25;
    margin-bottom: 20px;
}

h2 {
    color: var(--primary);
    font-size: 1.25rem;
    margin: 28px 0 10px;
}

p,
li {
    margin-bottom: 12px;
}

ul {
    padding-left: 24px;
}

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

.updated {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 25px;
}

.btn {
    display: inline-block;
    background-color: var(--secondary);
    color: white;
    padding: 13px 26px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 18px;
}

.btn:hover {
    background-color: #d62828;
}

.center {
    text-align: center;
}

.error-code {
    font-size: 5rem;
    font-weight: bold;
    color: var(--secondary);
    line-height: 1;
    margin-bottom: 10px;
}

.site-footer {
    background-color: var(--primary);
    color: #c9d3df;
    text-align: center;
    padding: 22px 0;
    font-size: 0.9rem;
}

.site-footer a {
    color: white;
}

@media (max-width: 600px) {
    .page-card {
        padding: 26px 20px;
    }

    h1 {
        font-size: 1.7rem;
    }

    .header-inner {
        justify-content: center;
        text-align: center;
    }
}