/* ============================================================
   Nexus-OS Sub-Page Styles (Phase 2 content pages)
   Shares design tokens with styles.css
   ============================================================ */

body.sub-page {
    background: var(--bg-dark-space);
    color: var(--text-white);
    font-family: 'Inter', sans-serif;
    margin: 0;
    min-height: 100vh;
}

.sub-page .glow-bg-blob { display: none; }

/* --- Sub-page Header --- */
.subheader {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(8, 9, 15, 0.85);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-glass);
    padding: 16px 24px;
}
.subheader-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}
.subheader .nav-logo { height: 34px; width: auto; object-fit: contain; }
.subheader nav ul {
    display: flex;
    gap: 22px;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
    flex-wrap: wrap;
}
.subheader nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-smooth);
}
.subheader nav a:hover, .subheader nav a[aria-current="page"] { color: var(--text-white); }
.subheader .cta-nav-btn {
    background: var(--accent-blue);
    color: #fff !important;
    padding: 9px 18px;
    border-radius: 8px;
    font-weight: 600;
}
.subheader .cta-nav-btn:hover { background: var(--accent-purple); }

/* --- Sub-page Hero --- */
.subhero {
    max-width: 1100px;
    margin: 0 auto;
    padding: 70px 24px 50px;
}
.breadcrumb {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 22px;
}
.breadcrumb a { color: var(--accent-blue); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.subhero .section-badge {
    display: inline-block;
    background: var(--accent-purple-glow);
    color: var(--accent-purple);
    border: 1px solid var(--border-glass-glow);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.4px;
    text-transform: uppercase;
    margin-bottom: 18px;
}
html[data-theme="light"] .sub-page .subhero .section-badge,
body.sub-page[data-theme="light"] .section-badge { color: var(--accent-purple); }
.subhero h1 {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(1.9rem, 4.5vw, 3rem);
    line-height: 1.15;
    margin: 0 0 18px;
    font-weight: 800;
}
.subhero h1 .accent { color: var(--accent-blue); }
.subhero .subhero-sub {
    font-size: 1.08rem;
    line-height: 1.7;
    color: var(--text-muted);
    max-width: 760px;
    margin: 0 0 30px;
}
.subhero .hero-cta-group { display: flex; gap: 14px; flex-wrap: wrap; }

/* --- Buttons (match landing page) --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 26px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.95rem;
    text-decoration: none;
    transition: var(--transition-smooth);
}
.btn-primary { background: var(--accent-blue); color: #fff; }
.btn-primary:hover { background: var(--accent-purple); transform: translateY(-2px); }
.btn-secondary {
    background: transparent;
    color: var(--text-white);
    border: 1px solid var(--border-glass-glow);
}
.btn-secondary:hover { border-color: var(--accent-blue); }

/* --- Content Sections --- */
.sub-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 50px 24px;
    border-top: 1px solid var(--border-glass);
}
.sub-section h2 {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(1.4rem, 3vw, 2rem);
    margin: 0 0 14px;
    font-weight: 700;
}
.sub-section .section-lead {
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 800px;
    margin: 0 0 34px;
    font-size: 1rem;
}
.sub-section p, .sub-section li {
    color: var(--text-white);
    line-height: 1.75;
    font-size: 0.97rem;
}
.sub-section .muted { color: var(--text-muted); }

/* --- Feature Card Grid --- */
.point-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 22px;
    margin-top: 10px;
}
.point-card {
    background: var(--bg-card-glass);
    border: 1px solid var(--border-glass);
    border-radius: 14px;
    padding: 26px;
    transition: var(--transition-smooth);
}
.point-card:hover { border-color: var(--border-glass-glow); transform: translateY(-3px); }
.point-card i {
    font-size: 1.7rem;
    color: var(--accent-blue);
    display: block;
    margin-bottom: 14px;
}
.point-card h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.08rem;
    margin: 0 0 10px;
    font-weight: 700;
}
.point-card p { color: var(--text-muted); font-size: 0.92rem; margin: 0; line-height: 1.65; }

/* --- Numbered Steps --- */
.steps-list { list-style: none; counter-reset: step; padding: 0; margin: 0; }
.steps-list li {
    counter-increment: step;
    position: relative;
    padding: 0 0 26px 60px;
}
.steps-list li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-purple-glow);
    border: 1px solid var(--border-glass-glow);
    color: var(--accent-blue);
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Outfit', sans-serif;
}
.steps-list li:last-child { padding-bottom: 0; }
.steps-list strong { display: block; font-size: 1.02rem; margin-bottom: 6px; }
.steps-list span { color: var(--text-muted); font-size: 0.94rem; }

/* --- FAQ --- */
.sub-faq details {
    background: var(--bg-card-glass);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 18px 22px;
    margin-bottom: 12px;
}
.sub-faq summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
}
.sub-faq summary::-webkit-details-marker { display: none; }
.sub-faq summary::after { content: '+'; color: var(--accent-blue); font-size: 1.3rem; font-weight: 700; }
.sub-faq details[open] summary::after { content: '–'; }
.sub-faq details p { color: var(--text-muted); margin: 14px 0 0; line-height: 1.7; }

/* --- Cross-link Block --- */
.related-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}
.related-links a {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--bg-card-glass);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 18px 20px;
    text-decoration: none;
    transition: var(--transition-smooth);
}
.related-links a:hover { border-color: var(--accent-blue); transform: translateY(-2px); }
.related-links a strong { color: var(--text-white); font-size: 0.97rem; }
.related-links a span { color: var(--text-muted); font-size: 0.84rem; }

/* --- Bottom CTA --- */
.sub-cta {
    text-align: center;
    background: linear-gradient(135deg, rgba(71, 16, 235, 0.12), rgba(0, 85, 239, 0.12));
    border: 1px solid var(--border-glass-glow);
    border-radius: 18px;
    padding: 50px 30px;
    margin: 20px auto 0;
}
.sub-cta h2 { margin-bottom: 10px; }
.sub-cta p { color: var(--text-muted); margin: 0 0 26px; }
.sub-cta .hero-cta-group { justify-content: center; display: flex; gap: 14px; flex-wrap: wrap; }

/* --- Sub-page Footer --- */
.sub-footer {
    border-top: 1px solid var(--border-glass);
    margin-top: 60px;
    padding: 34px 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}
.sub-footer a { color: var(--accent-blue); text-decoration: none; }
.sub-footer a:hover { text-decoration: underline; }

@media (max-width: 640px) {
    .subhero { padding: 50px 18px 34px; }
    .sub-section { padding: 40px 18px; }
    .subheader nav ul { gap: 14px; }
}