/* 既存の変数を参照（重複定義は避けるが、単体動作のため基本セットを記述） */
:root {
    --c-primary-dark: #16a085;
    --c-primary: #1abc9c;
    --c-primary-light: #e8f8f5;
    --c-dark-blue: #2c3e50;
    --c-slate-blue: #34495e;
    --c-dark-gray: #333333;
    --c-mid-gray: #555555;
    --c-light-gray: #7f8c8d;
    --c-border: #dddddd;
    --c-bg-light: #f8f9fa;
    --c-white: #ffffff;
    --spacing-md: 16px;
    --spacing-lg: 32px;
    --border-radius: 8px;
    --container-width: 1000px; /* 文章用なので少し狭める */
}

/* Reset & Base */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    background-color: var(--c-bg-light);
    color: var(--c-dark-gray);
    line-height: 1.8;
}

/* Header (Standard UI) */
.site-header {
    background-color: var(--c-white);
    border-bottom: 1px solid var(--c-border);
    padding: 30px 0;
    text-align: center;
}
.site-logo-text {
    font-size: 2.2rem;
    font-weight: 800;
}
.site-logo-text a {
    color: var(--c-primary-dark);
    text-decoration: none;
}
.site-subtitle {
    color: var(--c-light-gray);
    font-size: 0.9rem;
}

/* Main Layout */
main {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

/* Breadcrumb */
.breadcrumb {
    margin-bottom: 20px;
    font-size: 0.85rem;
}
.breadcrumb ol {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.breadcrumb li:not(:last-child)::after {
    content: ">";
    margin-left: 8px;
    color: var(--c-light-gray);
}
.breadcrumb a {
    color: var(--c-primary);
    text-decoration: none;
}
.breadcrumb a:hover {
    text-decoration: underline;
}

/* Content Area */
.content-container {
    background: var(--c-white);
    padding: 40px;
    border-radius: var(--border-radius);
    border: 1px solid var(--c-border);
    box-shadow: 0 4px 12px rgba(0,0,0,0.02);
}

.page-title {
    font-size: 1.8rem;
    color: var(--c-dark-blue);
    margin-bottom: 8px;
    border-left: 6px solid var(--c-primary);
    padding-left: 15px;
}

.last-updated {
    font-size: 0.85rem;
    color: var(--c-light-gray);
    margin-bottom: 40px;
}

.disclaimer-section {
    margin-bottom: 35px;
}

.disclaimer-section h3 {
    font-size: 1.2rem;
    color: var(--c-slate-blue);
    margin-bottom: 12px;
    border-bottom: 1px solid var(--c-border);
    padding-bottom: 8px;
}

.disclaimer-section p {
    margin-bottom: 15px;
}

.disclaimer-section ul {
    margin-left: 20px;
    margin-bottom: 15px;
    color: var(--c-mid-gray);
}

/* Contact / Footer Link */
.contact-prompt {
    margin-top: 50px;
    padding-top: 30px;
    border-top: 2px dashed var(--c-border);
    text-align: center;
}

.back-link {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 30px;
    background: var(--c-dark-blue);
    color: var(--c-white);
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}

.back-link:hover {
    background: var(--c-primary);
    transform: translateY(-2px);
}

/* Footer (Standard UI) */
.site-footer {
    background-color: var(--c-dark-blue);
    color: var(--c-white);
    padding: 40px 0 20px;
    margin-top: 60px;
}
.footer-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}
.footer-heading {
    font-size: 1rem;
    color: var(--c-primary);
    margin-bottom: 15px;
}
.footer-list {
    list-style: none;
    font-size: 0.85rem;
    color: #bdc3c7;
}
.footer-bottom {
    margin-top: 30px;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 768px) {
    .content-container { padding: 25px 20px; }
    .page-title { font-size: 1.5rem; }
}