/* ===================== PROJECT DETAIL PAGES ===================== */

/* Hero */
.project-detail-hero {
    padding: 96px 0 36px;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-bottom: 1px solid var(--border-color);
}

.pdh-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 20px;
    transition: var(--transition);
}
.pdh-back:hover { color: var(--primary-color); }
.pdh-back svg { width: 16px; height: 16px; }

.pdh-meta-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.pdh-badge {
    display: inline-block;
    font-size: 11.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    padding: 4px 11px;
    border-radius: 12px;
}
.pdh-badge.pdh-category {
    color: var(--primary-color);
    background-color: rgba(0, 102, 255, 0.08);
    border: 1px solid rgba(0, 102, 255, 0.18);
}
.pdh-badge.pdh-status {
    color: #008060;
    background-color: rgba(0, 200, 150, 0.08);
    border: 1px solid rgba(0, 200, 150, 0.18);
}
.pdh-badge.pdh-research {
    color: #6d4cff;
    background-color: rgba(109, 76, 255, 0.08);
    border: 1px solid rgba(109, 76, 255, 0.18);
}

.pdh-title {
    font-size: clamp(28px, 4.5vw, 40px);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.15;
    margin-bottom: 10px;
    letter-spacing: -0.4px;
}
.pdh-title em { font-style: italic; font-weight: 600; }

.pdh-tagline {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.55;
    max-width: 740px;
    margin-bottom: 22px;
}

.pdh-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.pdh-actions .btn {
    padding: 9px 18px;
    font-size: 13.5px;
}

/* Body layout */
.project-detail-body {
    padding: 48px 0 80px;
}

.pd-grid {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 48px;
    align-items: flex-start;
}

.pd-main {
    min-width: 0;
}

.pd-main h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 32px 0 12px;
    line-height: 1.25;
    letter-spacing: -0.2px;
}
.pd-main h2:first-child { margin-top: 0; }

.pd-main h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 22px 0 8px;
}

.pd-main p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.72;
    margin-bottom: 14px;
}

.pd-main p strong, .pd-main li strong { color: var(--text-primary); font-weight: 600; }
.pd-main em { color: var(--text-secondary); }
.pd-main code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 1px 6px;
    border-radius: 3px;
}

.pd-main ul {
    margin: 4px 0 18px;
    padding-left: 22px;
}
.pd-main ul li {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 8px;
}

/* Pull-quote / principle block */
.pd-principle {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.06) 0%, rgba(0, 200, 150, 0.04) 100%);
    border-left: 4px solid var(--primary-color);
    padding: 20px 24px;
    margin: 24px 0;
    border-radius: 0 8px 8px 0;
}
.pd-principle .label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary-color);
    margin-bottom: 6px;
}
.pd-principle p {
    font-size: 16px;
    color: var(--text-primary);
    line-height: 1.65;
    font-weight: 500;
    margin: 0;
}

/* Tech tag pills inline */
.pd-tags-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 8px 0 18px;
}
.pd-tags-inline span {
    display: inline-block;
    padding: 4px 10px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Stat strip */
.pd-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 14px;
    margin: 18px 0 22px;
}
.pd-stat {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px 16px;
}
.pd-stat .pd-stat-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: -0.5px;
}
.pd-stat .pd-stat-label {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 3px;
    line-height: 1.3;
}

/* Subsystem table for technical detail */
.pd-table {
    width: 100%;
    border-collapse: collapse;
    margin: 14px 0 22px;
    font-size: 14px;
}
.pd-table th, .pd-table td {
    text-align: left;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: top;
}
.pd-table th {
    font-weight: 700;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    font-size: 12.5px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}
.pd-table td { color: var(--text-secondary); line-height: 1.55; }
.pd-table td:first-child { color: var(--text-primary); font-weight: 600; width: 32%; }
.pd-table td code { font-size: 12.5px; }

/* Sidebar (quick facts) */
.pd-sidebar {
    position: sticky;
    top: 88px;
}

.pd-side-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 16px;
}

.pd-side-card h4 {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--text-light);
    margin-bottom: 12px;
}

.pd-side-card dl {
    margin: 0;
    font-size: 13.5px;
}
.pd-side-card dt {
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 10px;
}
.pd-side-card dt:first-child { margin-top: 0; }
.pd-side-card dd {
    margin: 2px 0 0;
    color: var(--text-secondary);
    line-height: 1.5;
}
.pd-side-card dd a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
}
.pd-side-card dd a:hover { border-bottom-color: var(--primary-color); }

.pd-side-card .tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}
.pd-side-card .tech-list span {
    display: inline-block;
    padding: 3px 9px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 11.5px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Next/prev navigation */
.pd-next-prev {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 56px;
    padding-top: 28px;
    border-top: 1px solid var(--border-color);
}

.pd-np-link {
    display: block;
    text-decoration: none;
    padding: 16px 20px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    transition: var(--transition);
}
.pd-np-link:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}
.pd-np-link .pd-np-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.7px;
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 4px;
}
.pd-np-link .pd-np-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
}
.pd-np-link.pd-np-next { text-align: right; }
.pd-np-link.pd-np-empty {
    background: transparent;
    border: 1px dashed var(--border-color);
}
.pd-np-link.pd-np-empty .pd-np-title { color: var(--text-light); }

/* Inline links */
.pd-main a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    font-weight: 500;
    transition: var(--transition);
}
.pd-main a:hover { border-bottom-color: var(--primary-color); }

/* Responsive */
@media (max-width: 960px) {
    .pd-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .pd-sidebar { position: static; }
    .pd-side-card { margin-bottom: 16px; }
}

@media (max-width: 768px) {
    .project-detail-hero {
        padding: 80px 0 28px;
    }
    .pdh-title { font-size: 26px; }
    .pdh-tagline { font-size: 15px; }
    .pd-main h2 { font-size: 19px; margin-top: 26px; }
    .pd-main h3 { font-size: 15.5px; }
    .pd-main p, .pd-main ul li { font-size: 14px; }
    .pd-principle p { font-size: 14.5px; }
    .pd-table { font-size: 13px; }
    .pd-table th, .pd-table td { padding: 8px 10px; }
    .pd-next-prev { grid-template-columns: 1fr; }
    .pd-np-link.pd-np-next { text-align: left; }
}