:root {
    --aki-purple: #8e44ad;
    --aki-dark: #2c3e50;
    --aki-bg: #f4f6f8;
    --aki-text: #333;
    --aki-border: #e8e8e8;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', sans-serif;
    line-height: 1.75;
    color: var(--aki-text);
    margin: 0;
    background-color: var(--aki-bg);
}

header {
    background: var(--aki-dark);
    color: white;
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 3px solid var(--aki-purple);
    box-shadow: 0 2px 5px rgba(0,0,0,0.15);
}

.header-inner {
    max-width: 840px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo { font-size: 1.1rem; font-weight: bold; }
.logo .sub { font-size: 0.8rem; opacity: 0.7; margin-left: 5px; }

.top-nav { display: flex; gap: 20px; align-items: center; }
.top-nav a {
    color: white;
    text-decoration: none;
    font-size: 0.85rem;
    opacity: 0.9;
    transition: 0.2s;
}
.top-nav a.back-link {
    background: var(--aki-purple);
    padding: 6px 14px;
    border-radius: 4px;
    font-weight: bold;
    opacity: 1;
    margin-left: 10px;
    display: flex;
    align-items: center;
    line-height: 1;
}

.container {
    max-width: 740px;
    margin: 40px auto 60px;
    background: white;
    padding: 32px 40px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.06);
    border-radius: 10px;
}

.manual-top-image { text-align: center; margin-bottom: 36px; }
.manual-top-image img {
    max-width: 100%;
    width: 600px;
    height: auto;
    border-radius: 6px;
    border: 1px solid #ddd;
}

section { margin-bottom: 20px; scroll-margin-top: 70px; }

hr {
    border: none;
    border-top: 2px solid var(--aki-bg);
    margin: 48px 0;
}

h2 {
    color: var(--aki-dark);
    border-left: 5px solid var(--aki-purple);
    padding-left: 14px;
    margin: 0 0 20px 0;
    font-size: 1.35rem;
}

.sub-h3 {
    font-size: 1.0rem;
    font-weight: bold;
    color: #444;
    margin: 36px 0 10px 0;
    padding: 6px 0 6px 10px;
    border-left: 3px solid #c5a8d8;
    background: #faf7fc;
}

.manual-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 4px 0;
    font-size: 0.9rem;
}
.manual-table th, .manual-table td {
    border: 1px solid var(--aki-border);
    padding: 11px 14px;
    text-align: left;
    vertical-align: top;
}
.manual-table th {
    background: #f5f5f5;
    color: #555;
    font-size: 0.85rem;
    white-space: nowrap;
}
.manual-table td { line-height: 1.65; }

.op-cell {
    width: 26%;
    font-weight: bold;
    color: #555;
    white-space: nowrap;
    font-size: 0.87rem;
}

kbd {
    background: #f1f1f1;
    border: 1px solid #ccc;
    padding: 1px 6px;
    font-weight: bold;
    border-radius: 3px;
    font-size: 0.85em;
}

.large-emoji { font-size: 1.1rem; margin-right: 6px; vertical-align: middle; }
.btn-text { font-size: 0.95rem; font-weight: bold; }

.tip-box {
    background: #f0f5fb;
    border-left: 4px solid #85b8d4;
    padding: 13px 16px;
    border-radius: 4px;
    font-size: 0.92rem;
    color: #444;
    margin-bottom: 28px;
    line-height: 1.7;
}

.note-text {
    font-size: 0.85rem;
    color: #999;
    margin: 6px 0 16px;
}

.caution-text {
    color: #c0392b;
    font-size: 0.87rem;
}

.notice-card {
    background: #fff8f0;
    border-left: 4px solid #e8a838;
    padding: 20px 24px;
    border-radius: 6px;
    margin: 0 0 10px;
}
.notice-card h3 {
    margin-top: 0;
    color: #c07000;
    font-size: 1.1rem;
    margin-bottom: 12px;
}
.notice-card ul {
    margin: 0;
    padding-left: 1.4em;
    color: #555;
}
.notice-card li { margin-bottom: 6px; }

.contact-box {
    margin-top: 48px;
    text-align: center;
    background: #f8f9fa;
    padding: 28px;
    border-radius: 10px;
    border: 1px dashed #ccc;
}
.creator-label {
    display: block;
    font-weight: bold;
    font-size: 1.1rem;
    margin-bottom: 16px;
}
.social-links {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}
.social-links a {
    text-decoration: none;
    background: white;
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid #ddd;
    color: var(--aki-dark);
    font-size: 0.9rem;
    transition: 0.2s;
}
.social-links a:hover { border-color: var(--aki-purple); color: var(--aki-purple); }
.contact-note { font-size: 0.85rem; color: #999; margin: 0; }

.shortcut-table td:first-child { white-space: nowrap; }

footer {
    text-align: center;
    padding: 30px;
    color: #bbb;
    font-size: 0.75rem;
    line-height: 1.8;
}