:root {
    --primary-color: #2E86AB;
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
}

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
}

/* Header */
header {
    background: var(--primary-color);
    color: #fff;
    padding: 12px 24px;
    height: auto;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
    z-index: 1100;
    flex-wrap: wrap;
    gap: 15px;
}

.header-title {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

header h1 {
    font-size: 1.3rem;
    font-weight: 700;
    white-space: nowrap;
    letter-spacing: 0.02em;
    margin-bottom: 0;
    border-bottom: none;
    padding-bottom: 0;
    color: #fff;
}

.subtitle {
    font-size: 0.9rem;
    opacity: 0.85;
    white-space: nowrap;
    font-weight: 400;
}

.header-info {
    font-size: 0.8rem;
    text-align: right;
    display: flex;
    flex-direction: column;
    justify-content: center;
    opacity: 0.9;
}

.header-info p {
    margin-bottom: 2px;
}

/* Mobile Header */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        padding: 12px 16px;
        gap: 10px;
    }
    .header-info {
        text-align: left;
        width: 100%;
        border-top: 1px solid rgba(255,255,255,0.15);
        padding-top: 8px;
    }
}

.container {
    max-width: 800px;
    margin: 40px auto;
    padding: 40px;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border-radius: 8px;
}

.container h1 {
    font-size: 24px;
    margin-bottom: 30px;
    border-bottom: 2px solid #2E86AB;
    padding-bottom: 10px;
    color: #333;
}

h2 {
    font-size: 20px;
    margin-top: 30px;
    margin-bottom: 15px;
    color: #2E86AB;
}

p {
    margin-bottom: 15px;
    font-size: 15px;
}

ul {
    margin-bottom: 15px;
    padding-left: 20px;
}

li {
    margin-bottom: 5px;
}

.back-link {
    display: inline-block;
    margin-top: 30px;
    text-decoration: none;
    color: #fff;
    background-color: #2E86AB;
    padding: 10px 20px;
    border-radius: 5px;
    font-size: 14px;
}

.back-link:hover {
    background-color: #236a8a;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding-bottom: 40px;
    font-size: 12px;
    color: #888;
}

footer a {
    color: #888;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}