/* Journal of Space Law — shared styles for article & volume subpages (aligned with index.html) */
/* Fonts: load via <link> in each HTML head (preconnect + stylesheet), not @import, for better performance. */

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

:root {
    --primary:     #0f2744;
    --primary-mid: #1a3a5c;
    --secondary:   #1d4ed8;
    --accent:      #c0392b;
    --accent-dk:   #9b2335;
    --light:       #f8fafc;
    --white:       #ffffff;
    --dark:        #0f172a;
    --gray:        #64748b;
    --gray-lt:     #94a3b8;
    --border:      #e2e8f0;
    --border-dk:   #cbd5e1;
    --shadow-sm:   0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md:   0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
    --radius:      10px;
}

body.site-subpage {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.65;
    color: var(--dark);
    background: var(--light);
    -webkit-font-smoothing: antialiased;
}

/* —— Header (matches index) —— */
.site-header {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.site-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 68px;
    position: relative;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.site-nav-wrap {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    position: relative;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
}

.site-logo-img {
    height: 50px;
    width: auto;
    display: block;
    flex-shrink: 0;
}

.site-logo-divider {
    width: 1px;
    height: 28px;
    background: var(--border-dk);
}

.site-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.site-logo-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.3px;
}

.site-logo-sub {
    font-size: 0.68rem;
    color: var(--gray);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

.site-nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--border-dk);
    border-radius: 6px;
    background: var(--white);
    font-family: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--primary);
    cursor: pointer;
}

.site-nav-toggle:hover {
    background: var(--light);
}

.site-nav-links {
    display: flex;
    gap: 0.15rem;
    align-items: center;
    flex-wrap: wrap;
}

.site-nav-links a {
    color: var(--gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.45rem 0.85rem;
    border-radius: 6px;
    transition: background 0.15s, color 0.15s;
}

.site-nav-links a:hover {
    color: var(--primary);
    background: var(--light);
}

.site-nav-links a.nav-external {
    border: 1px solid var(--border-dk);
    color: var(--dark);
    margin-left: 0.35rem;
}

.site-nav-links a.nav-external:hover {
    border-color: var(--primary);
    color: var(--primary);
}

@media (max-width: 700px) {
    .site-header-inner { padding: 0 1.25rem; }
    .site-nav-wrap { width: 100%; justify-content: flex-end; flex-wrap: wrap; }
    .site-nav-toggle { display: flex; }
    .site-nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        padding: 0.75rem 1.25rem 1rem;
        background: var(--white);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        gap: 0.25rem;
        z-index: 99;
    }
    .site-nav-links.is-open { display: flex; }
    .site-nav-links a { margin-left: 0 !important; }
}

/* —— Article page —— */
body.article-page main {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.article-back-link,
main a.back-link {
    display: inline-block;
    margin-bottom: 1.5rem;
    color: var(--secondary);
    text-decoration: none;
    font-weight: 500;
}

.article-back-link:hover,
main a.back-link:hover {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.article-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.article-journal-badge,
a.journal-badge {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-decoration: none;
}

.article-journal-badge:hover,
a.journal-badge:hover {
    background: var(--primary-mid);
}

.article-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.article-authors {
    font-size: 1rem;
    color: var(--primary-mid);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.article-meta {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    padding: 1rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.meta-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray);
    font-weight: 600;
}

.meta-value {
    font-size: 0.95rem;
    color: var(--dark);
    font-weight: 500;
}

.download-btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--accent);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: background 0.2s;
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.download-btn:hover {
    background: var(--accent-dk);
}

.site-footer {
    background: var(--dark);
    color: rgba(255,255,255,0.85);
    padding: 2rem;
    text-align: center;
    margin-top: 3rem;
}

.site-footer a {
    color: rgba(255,255,255,0.9);
}

/* —— Volume page —— */
body.volume-page main {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.volume-header {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    margin-bottom: 2rem;
}

.volume-header h1 {
    color: var(--primary);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.volume-header .year {
    color: var(--gray);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.issues-section { margin-top: 2rem; }

.issue {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    margin-bottom: 2rem;
    overflow: hidden;
}

.issue-header {
    background: var(--primary);
    color: white;
    padding: 1rem 1.5rem;
}

.issue-header h2 { font-size: 1.25rem; }

.toc { list-style: none; }

.toc-item {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.toc-item:last-child { border-bottom: none; }

.toc-item:hover { background: var(--light); }

.toc-item .article-title {
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.25rem;
    font-size: 1.05rem;
}

.toc-item .article-title a {
    color: inherit;
    text-decoration: none;
}

.toc-item .article-title a:hover {
    color: var(--secondary);
    text-decoration: underline;
}

.toc-item .article-authors {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.toc-item .article-meta {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
    border: none;
    padding: 0;
    margin: 0;
}

.article-pages { color: var(--primary-mid); font-weight: 500; }

.volume-page .download-btn {
    display: inline-block;
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    border-radius: 6px;
}

.volume-page .download-btn.coming {
    background: var(--gray);
    cursor: not-allowed;
}

.from-editor {
    background: #fefcbf;
    padding: 1rem 1.5rem;
    border-left: 4px solid #d69e2e;
}