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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

header {
    background: #1a1a2e;
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: #fff;
}

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

main:has(.toc-layout) {
    max-width: 1140px;
}

.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: #fff;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.hero-cta {
    display: inline-block;
    margin-top: 1.5rem;
    padding: 0.75rem 2rem;
    background: #fff;
    color: #1a1a2e;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    border-radius: 8px;
    transition: background 0.3s, transform 0.2s;
}

.hero-cta:hover {
    background: #e0e0e0;
    transform: translateY(-2px);
}

/* TOC layout */
.toc-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2rem;
}

.toc-sidebar {
    position: sticky;
    top: 80px;
    align-self: start;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}

.toc-sidebar ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.toc-sidebar a {
    display: block;
    padding: 0.4rem 0.75rem;
    color: #666;
    text-decoration: none;
    font-size: 0.85rem;
    border-left: 3px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}

.toc-sidebar a:hover {
    color: #1a1a2e;
}

.toc-sidebar a.active {
    color: #1a1a2e;
    font-weight: 600;
    border-left-color: #1a1a2e;
}

.content-section {
    background: #fff;
    padding: 2rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    scroll-margin-top: 80px;
}

.content-section h2 {
    color: #1a1a2e;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #eee;
}

.content-section .subtitle {
    color: #666;
    font-style: italic;
    margin-bottom: 1rem;
}

.scenario-missing {
    text-align: center;
    color: #666;
    margin-top: 2rem;
    font-size: 0.95rem;
}

/* Scenarios page */
.scenario-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.scenario-btn {
    padding: 1rem 1.5rem;
    background: #fff;
    border: 2px solid #1a1a2e;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
}

.scenario-btn:hover {
    background: #1a1a2e;
    color: #fff;
}

.scenario-btn.active {
    background: #1a1a2e;
    color: #fff;
}

.scenario-content {
    display: none;
}

.scenario-content.active {
    display: block;
}

.scenario-detail {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.scenario-detail h3 {
    color: #1a1a2e;
    margin-bottom: 1rem;
}

.royalty-list {
    list-style: none;
    margin-top: 1rem;
}

.royalty-list li {
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background: #f8f9fa;
    border-left: 4px solid #1a1a2e;
    border-radius: 0 4px 4px 0;
}

.organization-tag {
    display: inline-block;
    background: #e9ecef;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    margin-left: 0.5rem;
    color: #495057;
}

footer {
    text-align: center;
    padding: 2rem;
    background: #1a1a2e;
    color: #ccc;
    margin-top: 2rem;
}

.footer-links {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #fff;
}

.footer-sep {
    margin: 0 0.5rem;
    color: #666;
}

.content-section h3 {
    color: #1a1a2e;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.content-section p {
    margin-bottom: 0.75rem;
}

.content-section ul, .content-section ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.content-section li {
    margin-bottom: 0.4rem;
}

.info-box {
    background: #f0f4ff;
    border-left: 4px solid #1a1a2e;
    padding: 1rem 1.25rem;
    border-radius: 0 6px 6px 0;
    margin: 1rem 0;
}

.info-box p {
    margin-bottom: 0;
}

.info-box.warning {
    background: #fff8e1;
    border-left-color: #f9a825;
}

.info-box.tip {
    background: #e8f5e9;
    border-left-color: #2e7d32;
}

.org-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 1rem 0;
}

.org-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1.25rem;
    border: 1px solid #e9ecef;
}

.org-card h4 {
    color: #1a1a2e;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.org-card p {
    font-size: 0.95rem;
    margin-bottom: 0.4rem;
}

.org-card .org-type {
    display: inline-block;
    background: #1a1a2e;
    color: #fff;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
}

.royalty-type-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 1rem;
    border-left: 4px solid #1a1a2e;
}

.royalty-type-card h4 {
    color: #1a1a2e;
    margin-bottom: 0.5rem;
}

strong {
    color: #1a1a2e;
}

@media (max-width: 768px) {
    header {
        padding: 0.75rem 1rem;
    }

    .logo {
        font-size: 1.1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    main:has(.toc-layout) {
        max-width: 900px;
    }

    .toc-layout {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .toc-sidebar {
        position: static;
        max-height: none;
        overflow-x: auto;
        margin-bottom: 1rem;
        padding-bottom: 0.5rem;
    }

    .toc-sidebar ul {
        flex-direction: row;
        gap: 0;
    }

    .toc-sidebar a {
        white-space: nowrap;
        border-left: none;
        border-bottom: 3px solid transparent;
        padding: 0.4rem 0.6rem;
    }

    .toc-sidebar a.active {
        border-left: none;
        border-bottom-color: #1a1a2e;
    }

    .org-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .scenario-selector {
        flex-direction: column;
    }

    .scenario-btn {
        width: 100%;
    }
}