/* ================================================
   PROJECT DETAIL PAGES — V2 Design System Extension
   ================================================ */

/* ----- PROJECT HERO ----- */
.project-hero {
    padding: 140px 24px 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.project-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 500px;
    background: radial-gradient(ellipse at center,
            rgba(41, 151, 255, 0.1) 0%,
            rgba(191, 90, 242, 0.06) 40%,
            transparent 70%);
    pointer-events: none;
    filter: blur(80px);
}

.project-hero .container {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.project-hero .tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-1);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 24px;
}

.project-hero h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 16px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.project-hero .subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    font-weight: 400;
    line-height: 1.7;
    margin-bottom: 24px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-bottom: 28px;
}

.project-meta span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.project-meta span i {
    color: var(--accent-1);
    font-size: 0.8rem;
}

.project-hero .hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 16px;
}

/* Bouton Retour — hero uniquement */
.project-hero .back-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 40px;
    padding: 10px 24px;
    border-radius: var(--radius-pill);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    box-sizing: border-box;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.project-hero .back-link i {
    font-size: 0.8rem;
}

.project-hero .back-link:hover {
    border-color: var(--border-hover);
    color: var(--text);
    background: var(--bg-card-hover);
}

/* Lien Documentation — en tête du contenu, intégré au flux */
.project-doc-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 20px;
    margin-bottom: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.project-doc-link:hover {
    border-color: var(--border-hover);
    color: var(--accent-1);
    background: var(--bg-card-hover);
}

.project-doc-link i:first-child {
    color: var(--accent-1);
    font-size: 0.95rem;
}

.project-doc-link i:last-child {
    font-size: 0.7rem;
    opacity: 0.7;
    transition: transform var(--transition);
}

.project-doc-link:hover i:last-child {
    transform: translateY(2px);
}

/* ----- PROJECT CONTAINER ----- */
.project-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ----- PROJECT SECTIONS ----- */
.project-section {
    padding: 64px 0;
    border-bottom: 1px solid var(--border);
}

.project-section:last-child {
    border-bottom: none;
}

.project-section h2 {
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.project-section h2 i {
    color: var(--accent-1);
    font-size: 0.9em;
}

.project-section h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.project-section p {
    font-size: 0.94rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.project-section ul {
    list-style: none;
    padding: 0;
}

.project-section ul li {
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.project-section ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-1);
    font-weight: 600;
}

/* ----- GRID 2 COL ----- */
.grid-2 {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 24px;
}

.grid-2 .card-content,
.grid-2 .tech-stack {
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.tech-stack ul li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
}

.tech-stack ul li::before {
    display: none;
}

.tech-stack ul li i {
    color: var(--accent-1);
    width: 20px;
    text-align: center;
    font-size: 0.9rem;
}

/* ----- TIMELINE ----- */
.timeline {
    position: relative;
    padding-left: 48px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, var(--accent-1), var(--accent-2));
    opacity: 0.3;
}

.timeline-item {
    position: relative;
    padding-bottom: 32px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-icon {
    position: absolute;
    left: -48px;
    top: 0;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--bg);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.timeline-icon i {
    font-size: 0.75rem;
    color: var(--accent-1);
}

.timeline-content {
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.timeline-content:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.timeline-content h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

.timeline-content p {
    margin-bottom: 8px;
}

.timeline-content p:last-child {
    margin-bottom: 0;
}

.timeline-content code {
    padding: 2px 8px;
    background: rgba(41, 151, 255, 0.1);
    border: 1px solid rgba(41, 151, 255, 0.15);
    border-radius: 6px;
    font-size: 0.82rem;
    font-family: 'SF Mono', 'Fira Code', monospace;
    color: var(--accent-1);
}

/* ----- CHALLENGES ----- */
.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.challenge-card {
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.challenge-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.challenge-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.challenge-card p {
    font-size: 0.88rem;
    line-height: 1.6;
    margin-bottom: 8px;
}

.challenge-card .solution {
    padding: 12px 16px;
    background: rgba(41, 151, 255, 0.06);
    border: 1px solid rgba(41, 151, 255, 0.1);
    border-radius: var(--radius-sm);
    margin-top: 8px;
}

.challenge-card .competence {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent-2);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-top: 8px;
}

/* ----- COMPETENCES LIST ----- */
.competences-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.comp-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.comp-item:hover {
    border-color: var(--border-hover);
}

.check {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(52, 199, 89, 0.12);
    border: 1px solid rgba(52, 199, 89, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.8rem;
    color: #34c759;
}

.comp-text strong {
    display: block;
    font-size: 0.92rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.comp-text strong small {
    font-weight: 500;
    color: var(--accent-2);
    font-size: 0.8rem;
}

.comp-text small {
    font-size: 0.82rem;
    color: var(--text-tertiary);
    line-height: 1.6;
}

/* ----- GANTT ----- */
.gantt-wrapper {
    margin-top: 16px;
}

.gantt-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    margin-bottom: 16px;
}

.gantt-table thead th {
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.04);
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-align: left;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.gantt-table tbody td {
    padding: 14px 18px;
    font-size: 0.88rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    line-height: 1.5;
}

.gantt-table tbody tr:last-child td {
    border-bottom: none;
}

.gantt-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.gantt-full-img {
    width: 100%;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    margin-bottom: 16px;
}

.gantt-details {
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.gantt-details p {
    margin-bottom: 4px;
}

/* ----- DOCUMENTATION ----- */
.documentation-section {
    padding: 80px 0;
    border-top: 1px solid var(--border);
}

.documentation-section h2 {
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.documentation-section h2 i {
    color: var(--accent-1);
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.doc-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}

.doc-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.doc-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: rgba(255, 59, 48, 0.1);
    border: 1px solid rgba(255, 59, 48, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.doc-icon i {
    font-size: 1.1rem;
    color: #ff3b30;
}

.doc-info h3 {
    font-size: 0.92rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.doc-info p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-bottom: 4px;
    line-height: 1.4;
}

.doc-type {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent-2);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.download-icon {
    color: var(--text-tertiary);
    margin-left: auto;
    font-size: 0.9rem;
    transition: var(--transition);
}

.doc-card:hover .download-icon {
    color: var(--accent-1);
}

/* ----- BACK LINK ----- */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition);
    margin-bottom: 32px;
}

.back-link:hover {
    border-color: var(--border-hover);
    color: var(--text);
}

/* ----- VEILLE — THEME CARDS ----- */
.veille-themes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.veille-theme-card {
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.veille-theme-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.veille-theme-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.veille-theme-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    border: 1px solid;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.veille-theme-card h3 {
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.veille-theme-card>p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.veille-article {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.veille-article-badge {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(41, 151, 255, 0.1);
    border: 1px solid rgba(41, 151, 255, 0.15);
    border-radius: var(--radius-pill);
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--accent-1);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 10px;
}

.veille-article-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.veille-article-link:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.veille-article-link>i:first-child {
    color: var(--accent-1);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.veille-article-link div {
    flex: 1;
    min-width: 0;
}

.veille-article-link div strong {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 2px;
    line-height: 1.3;
}

.veille-article-link div span {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.veille-article-link>i:last-child {
    color: var(--text-tertiary);
    font-size: 0.7rem;
    transition: var(--transition);
    flex-shrink: 0;
}

.veille-article-link:hover>i:last-child {
    color: var(--accent-1);
    transform: translateX(3px);
}

/* ----- VEILLE — TOOLS ----- */
.veille-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}

.veille-tool-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.veille-tool-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.veille-tool-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    border: 1px solid;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.veille-tool-info h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.veille-tool-info p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
}

.veille-tool-info em {
    color: var(--text);
    font-style: normal;
    font-weight: 600;
}

/* ----- VEILLE — BENEFITS ----- */
.veille-benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.veille-benefit-card {
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
}

.veille-benefit-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.veille-benefit-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto 16px;
    border-radius: var(--radius-md);
    background: rgba(41, 151, 255, 0.08);
    border: 1px solid rgba(41, 151, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--accent-1);
    transition: var(--transition);
}

.veille-benefit-card:hover .veille-benefit-icon {
    background: rgba(41, 151, 255, 0.15);
    transform: scale(1.1);
}

.veille-benefit-card h4 {
    font-size: 1.05rem;
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.veille-benefit-card p {
    font-size: 0.88rem;
    color: var(--text-tertiary);
    line-height: 1.6;
}

/* ----- RESPONSIVE ----- */
@media (max-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }

    .project-hero {
        padding: 120px 16px 60px;
    }

    .project-meta {
        flex-direction: column;
        align-items: center;
    }

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

    .timeline {
        padding-left: 40px;
    }

    .timeline-icon {
        left: -40px;
        width: 28px;
        height: 28px;
    }

    .timeline-icon i {
        font-size: 0.65rem;
    }

    .gantt-table {
        font-size: 0.8rem;
    }

    .gantt-table thead th,
    .gantt-table tbody td {
        padding: 10px 12px;
    }

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

    .veille-themes-grid {
        grid-template-columns: 1fr;
    }

    .veille-tools-grid {
        grid-template-columns: 1fr;
    }

    .veille-benefits-grid {
        grid-template-columns: 1fr;
    }
}

/* ================================================
   BOUTON RETOUR EN HAUT
   ================================================ */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
    z-index: 800;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    color: var(--accent-1);
    transform: translateY(-2px);
}

.back-to-top i {
    font-size: 1rem;
}

/* Mobile — bouton retour en haut et lien documentation */
@media (max-width: 768px) {
    .back-to-top {
        bottom: max(16px, env(safe-area-inset-bottom, 16px));
        right: max(16px, env(safe-area-inset-right, 16px));
        width: 44px;
        height: 44px;
    }

    .back-to-top i {
        font-size: 0.95rem;
    }

    /* Lien Documentation — pleine largeur sur petit écran */
    .project-doc-link {
        padding: 14px 20px;
        margin-bottom: 24px;
    }
}