:root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #d1d5db;
    --accent: #2563eb;
    --accent-dark: #1e40af;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

header {
    background: linear-gradient(135deg, #111827, #1f2937);
    color: white;
    padding: 32px 20px;
}

.header-inner {
    max-width: 980px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 22px;
}

header img {
    width: 124px;
    height: 124px;
    object-fit: contain;
    border-radius: 12px;
    flex: 0 0 auto;
}

.header-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

header h1 {
    margin: 0 0 8px 0;
    font-size: 2rem;
    line-height: 1.2;
}

header p {
    margin: 0;
    color: #d1d5db;
}

header a,
footer a {
    color: #bfdbfe;
    text-decoration: none;
}

header a:hover,
footer a:hover {
    color: white;
    text-decoration: underline;
}

@media (max-width: 640px) {
    .header-inner {
        flex-direction: column;
        text-align: center;
    }

    header img {
        width: 110px;
        height: 110px;
    }

    header h1 {
        font-size: 1.6rem;
    }
}

main {
    max-width: 980px;
    margin: 32px auto;
    padding: 0 20px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
}

h2 {
    margin-top: 32px;
    color: #111827;
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
}

h2:first-child {
    margin-top: 0;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    color: var(--accent-dark);
    text-decoration: underline;
}

ul {
    padding-left: 22px;
}

.notice {
    background: #eff6ff;
    border-left: 4px solid var(--accent);
    padding: 14px 16px;
    margin: 20px 0;
    border-radius: 8px;
}

.muted {
    color: var(--muted);
    font-size: 0.95rem;
}

footer {
    text-align: center;
    color: #d1d5db;
    background: linear-gradient(135deg, #111827, #1f2937);
    padding: 24px 20px 40px;
    font-size: 0.95rem;
}

footer p {
    margin: 6px 0;
}