/* Basic Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Songti SC', 'STSong', 'SimSun', Georgia, serif;
    line-height: 1.8;
    color: #2A2A2A;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    background: #FAF8F3;
}

/* Header & Navigation */
header {
    background: #4A1518;
    color: white;
    padding: 1rem 0;
    margin: -20px -20px 2rem -20px;
    text-align: center;
}

nav {
    margin: 0;
    padding: 0;
    border-bottom: none;
}

nav a {
    display: inline-block;
    margin: 0 0.6rem;
    color: white;
    text-decoration: none;
    padding: 0.5rem 0.8rem;
    border-radius: 4px;
    transition: background 0.3s;
}

nav a:hover {
    background: rgba(255, 255, 255, 0.15);
    text-decoration: none;
    color: white;
}

.external-icon {
    font-size: 0.8em;
    opacity: 0.7;
    margin-left: 0.2em;
    color: white;
}

/* Main Content */
main {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Typography */
h1 {
    color: #4A1518;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

h2 {
    color: #3D1515;
    font-size: 1.8rem;
    margin: 2rem 0 1rem;
    border-bottom: 2px solid #8B1A1A;
    padding-bottom: 0.5rem;
}

h3 {
    color: #4A1518;
    font-size: 1.4rem;
    margin: 1.5rem 0 0.8rem;
}

p {
    margin-bottom: 1.2rem;
    text-align: justify;
}

/* Links */
a {
    color: #8B1A1A;
    text-decoration: none;
}

a:hover {
    color: #6B0000;
    text-decoration: underline;
}

/* Special Elements */
.logical-chain {
    background: #F5EEEE;
    border-left: 4px solid #8B1A1A;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 4px 4px 0;
}

.related {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid #D4A0A0;
}

/* Lists */
.page-list {
    list-style: none;
}

.page-list li {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: #FAF5F5;
    border-radius: 4px;
    border-left: 3px solid #8B1A1A;
}

ol, ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    margin-top: 3rem;
    padding: 2rem 0;
    border-top: 2px solid #D4A0A0;
    text-align: center;
    color: #7f8c8d;
    background: #F5EEEE;
    margin-left: -20px;
    margin-right: -20px;
}

footer a {
    color: #8B1A1A;
}

/* Community Invite Box */
.community-invite {
    background: linear-gradient(135deg, #FAF5F5 0%, #E8D0D0 100%);
    border: 2px solid #E8C8C8;
    border-radius: 12px;
    padding: 1.5rem;
    margin: 2rem 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.community-invite h3 {
    color: #4A1518;
    margin-bottom: 1rem;
    font-size: 1.3em;
}

.community-invite p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.community-invite ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.community-invite li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    margin: 1rem 0.5rem 0 0;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(45deg, #8B1A1A 0%, #4A1518 100%);
    color: white;
}

.btn-primary:hover {
    color: white;
}

.btn-secondary {
    background: linear-gradient(45deg, #F5EEEE 0%, #E8D0D0 100%);
    color: #4A1518;
}

.btn-secondary:hover {
    color: #4A1518;
}

.cta-button {
    display: inline-block;
    padding: 12px 24px;
    background: linear-gradient(45deg, #8B1A1A 0%, #4A1518 100%);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: bold;
    transition: transform 0.2s, box-shadow 0.2s;
    margin: 1rem 0.5rem 0 0;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(139, 26, 26, 0.4);
    text-decoration: none;
    color: white;
}

/* Glossary highlight link in footer */
.glossary-highlight {
    color: #8B1A1A;
    font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    header {
        margin: -10px -10px 1rem -10px;
    }

    main {
        padding: 1rem;
    }

    nav a {
        display: inline-block;
        margin: 0.2rem 0.3rem;
        font-size: 0.9em;
        padding: 0.4rem 0.6rem;
    }

    .btn, .cta-button {
        display: block;
        text-align: center;
        margin: 0.5rem 0;
    }
}

/* Book Navigation Styles */
.book-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    margin: 2rem 0;
    background: linear-gradient(135deg, #FAF5F5 0%, #E8D0D0 100%);
    border-radius: 12px;
    border: 1px solid rgba(0,0,0,0.1);
    flex-wrap: wrap;
    gap: 1rem;
}

.book-navigation a {
    text-decoration: none;
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    flex: 1;
    text-align: center;
    min-width: 120px;
}

.nav-prev {
    background: linear-gradient(45deg, #F5EEEE 0%, #E8D0D0 100%);
    color: #4A1518;
}

.nav-main {
    background: linear-gradient(45deg, #8B1A1A 0%, #4A1518 100%);
    color: white;
    font-size: 1.1em;
    flex: 2;
}

.nav-next {
    background: linear-gradient(45deg, #F5EEEE 0%, #E8D0D0 100%);
    color: #4A1518;
}

.nav-prev:hover, .nav-next:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    color: #3D1515;
}

.nav-main:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 26, 26, 0.4);
    color: white;
}

@media (max-width: 768px) {
    .book-navigation {
        flex-direction: column;
        text-align: center;
    }

    .book-navigation a {
        flex: none;
        width: 100%;
        margin: 0.25rem 0;
    }
}

/* === BOOK CHAPTER === */
.book-chapter { max-width: 700px; margin: 0 auto; padding: 2rem 0; }
.chapter-part-label { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; color: #7f8c8d; margin-bottom: 0.5rem; }
.chapter-subtitle { font-size: 1.2rem; color: #7f8c8d; font-style: italic; margin-top: -0.5rem; margin-bottom: 2rem; }
.buy-the-book { margin: 3rem 0 1rem; padding: 1.5rem; background: #F5EEEE; border-radius: 6px; text-align: center; }
.buy-the-book p { margin-bottom: 1rem; color: #7f8c8d; }
.chapter-copyright { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid #D4A0A0; font-size: 0.8rem; color: #7f8c8d; }

/* Wayist Saying / Block Quote */
blockquote.wayist-saying {
    border-left: 4px solid #8B1A1A;
    background: #FAF5F5;
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    border-radius: 0 4px 4px 0;
    font-style: italic;
    color: #3D1515;
}
blockquote.wayist-saying p { margin-bottom: 0.3rem; text-align: left; }