* {
    box-sizing: border-box;
}

:root {
    --bg: #eef2f1;
    --surface: #ffffff;
    --ink: #172522;
    --muted: #66736f;
    --line: #d5ddda;
    --accent: #176b5a;
    --accent-light: #dceee9;
    --dark: #18312c;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.75;
}

a {
    color: #125d4e;
}

header {
    background: var(--surface);
    border-bottom: 1px solid var(--line);
}

.header-inner,
main,
.footer-inner {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.header-inner {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 25px;
}

.brand {
    color: var(--ink);
    text-decoration: none;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.brand strong {
    color: var(--accent);
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 17px;
}

nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.92rem;
}

nav a:hover {
    color: var(--accent);
}

.hero {
    padding: 78px 0 60px;
    max-width: 900px;
}

.label {
    margin: 0 0 12px;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

h1 {
    margin: 0 0 20px;
    color: var(--dark);
    font-size: clamp(2.4rem, 6vw, 4.5rem);
    line-height: 1.04;
    letter-spacing: -0.05em;
}

h2 {
    margin: 0 0 15px;
    color: var(--dark);
    font-size: clamp(1.55rem, 3vw, 2.25rem);
    line-height: 1.2;
}

h3 {
    margin: 30px 0 9px;
    color: var(--dark);
}

.lead {
    margin: 0;
    max-width: 800px;
    color: #50605b;
    font-size: 1.15rem;
}

.layout {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(250px, 0.7fr);
    gap: 30px;
    align-items: start;
}

.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 34px;
}

.sidebar {
    background: var(--dark);
    color: #e8efed;
    border-radius: 12px;
    padding: 28px;
}

.sidebar h2 {
    color: #ffffff;
}

.sidebar a {
    color: #a8d7cb;
}

.sidebar li {
    margin: 9px 0;
}

.notice {
    margin: 26px 0;
    padding: 18px 20px;
    background: var(--accent-light);
    border: 1px solid #c7e2da;
    border-radius: 8px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
}

th,
td {
    padding: 12px;
    border: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

th {
    background: #f3f6f5;
}

section {
    margin-top: 30px;
    padding: 55px 0;
    border-top: 1px solid var(--line);
}

footer {
    margin-top: 65px;
    background: var(--dark);
    color: #c7d5d1;
}

.footer-inner {
    padding: 32px 0 42px;
}

@media (max-width: 780px) {
    .header-inner {
        align-items: flex-start;
        flex-direction: column;
        padding: 20px 0;
    }

    .layout {
        grid-template-columns: 1fr;
    }

    .hero {
        padding-top: 52px;
    }

    .card,
    .sidebar {
        padding: 24px;
    }
}