/* --- Header minimal --- */
.cs-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--cream);
    border-bottom: 1px solid var(--line);
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

@media (min-width: 1024px) {
    .cs-header {
        padding: 0 40px;
    }
}

.cs-close-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: 'Inter', sans-serif;
    font-size: .73rem;
    font-weight: 600;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ink-light);
    border: 1px solid var(--line);
    border-radius: 2px;
    padding: 8px 16px;
    cursor: pointer;
    background: transparent;
    transition: color .2s, border-color .2s, background .2s;
}

.cs-close-btn:hover {
    color: var(--ink);
    border-color: var(--ink-light);
    background: var(--cream-warm);
}

.cs-close-btn svg {
    flex-shrink: 0;
}

/* --- Hero --- */
.cs-hero {
    padding: 72px 24px 80px;
    text-align: center;
}

@media (min-width: 1024px) {
    .cs-hero {
        padding: 88px 40px 96px;
    }
}

.cs-project-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: 'Inter', sans-serif;
    font-size: .72rem;
    font-weight: 600;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: rgba(219, 101, 69, .9);
    margin-bottom: 24px;
}

.cs-project-tag::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 2px;
    background: var(--coral);
}

.cs-hero-title {
    font-family: 'Fraunces', serif;
    font-weight: 300;
    line-height: 1.05;
    color: var(--cream);
    margin-bottom: 24px;
}

.cs-hero-desc {
    font-family: 'Inter', sans-serif;
    font-size: 1.05rem;
    line-height: 1.7;
    color: rgba(242, 239, 232, .75);
    max-width: 780px;
    margin: 0 auto;
}

/* --- Sections --- */
.cs-section {
    padding: 72px 24px;
    max-width: 1100px;
    margin: 0 auto;
}

@media (min-width: 1024px) {
    .cs-section {
        padding: 80px 40px;
    }
}

.cs-section-title {
    font-family: 'Fraunces', serif;
    font-weight: 300;
    font-size: 2rem;
    line-height: 1.2;
    color: var(--ink);
    margin-bottom: 32px;
}

.cs-section-title em {
    font-style: italic;
    color: var(--coral);
}

/* --- Info grid (3 colonnes) --- */
.cs-info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 768px) {
    .cs-info-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.cs-info-card {
    background: var(--cream-soft);
    border: 1px solid #E5E2D9;
    border-top: 2px solid var(--navy);
    border-radius: 4px;
    padding: 24px;
    transition: transform .3s ease, box-shadow .3s ease;
}

.cs-info-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(23, 26, 33, .07);
}

.cs-info-card-label {
    font-family: 'Inter', sans-serif;
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--navy);
    margin-bottom: 12px;
    display: block;
}

.cs-info-card p {
    font-size: .875rem;
    color: var(--ink-light);
    line-height: 1.65;
}

/* --- Challenge / Solution (2 colonnes) --- */
.cs-challenge-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.cs-challenge-card,
.cs-solution-card {
    background: var(--cream-soft);
    border: 1px solid #E5E2D9;
    border-radius: 4px;
    padding: 28px;
    transition: transform .3s ease;
}

.cs-challenge-card:hover,
.cs-solution-card:hover {
    transform: translateY(-2px);
}

.cs-challenge-card {
    border-top: 2px solid var(--coral);
}

.cs-solution-card {
    border-top: 2px solid var(--navy);
}

.cs-card-label {
    font-family: 'Inter', sans-serif;
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .18em;
    text-transform: uppercase;
    margin-bottom: 14px;
    display: block;
}

.cs-card-label.defi {
    color: var(--coral);
}

.cs-card-label.solution {
    color: var(--navy);
}

.cs-challenge-card p,
.cs-solution-card p {
    font-size: .875rem;
    color: var(--ink-light);
    line-height: 1.65;
    margin-bottom: 12px;
}

.cs-feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cs-feature-list li {
    position: relative;
    padding-left: 16px;
    font-size: .85rem;
    color: var(--ink-light);
    line-height: 1.65;
}

.cs-feature-list li::before {
    content: '·';
    color: var(--coral);
    font-size: 1.2rem;
    position: absolute;
    left: 0;
    top: 0;
    line-height: 1.2;
}

/* --- Showcase images (grille 2×2) --- */
.cs-showcase-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

@media (min-width: 640px) {
    .cs-showcase-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.cs-showcase-item {
    position: relative;
    border-radius: 4px;
    overflow: hidden;
    aspect-ratio: 16/10;
    border: 1px solid var(--line);
    background: var(--cream-warm);
}

.cs-showcase-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .55s ease;
}

.cs-showcase-item:hover img {
    transform: scale(1.04);
}

.cs-showcase-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(20, 40, 64, .9) 0%, rgba(20, 40, 64, .3) 60%, transparent 100%);
    padding: 24px 18px 16px;
    transform: translateY(40%);
    opacity: 0;
    transition: transform .35s ease, opacity .35s ease;
}

.cs-showcase-item:hover .cs-showcase-overlay {
    transform: translateY(0);
    opacity: 1;
}

.cs-showcase-overlay h4 {
    font-family: 'Inter', sans-serif;
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--coral);
    margin-bottom: 4px;
}

.cs-showcase-overlay p {
    font-size: .8rem;
    color: rgba(242, 239, 232, .8);
    line-height: 1.3;
}

/* --- Bouton "Visiter le site" --- */
.cs-visit-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: 'Inter', sans-serif;
    font-size: .75rem;
    font-weight: 600;
    letter-spacing: .14em;
    text-transform: uppercase;
    background: var(--coral);
    color: white;
    padding: 14px 28px;
    border-radius: 2px;
    transition: background .25s;
}

.cs-visit-btn:hover {
    background: var(--coral-dark);
}

/* --- Bouton fermer secondaire (dans le CTA) --- */
.cs-close-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: 'Inter', sans-serif;
    font-size: .73rem;
    font-weight: 500;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: rgba(242, 239, 232, .5);
    cursor: pointer;
    background: transparent;
    border: none;
    padding: 0;
    transition: color .2s;
}

.cs-close-secondary:hover {
    color: rgba(242, 239, 232, .85);
}

.cs-close-secondary svg {
    transition: transform .2s;
}

.cs-close-secondary:hover svg {
    transform: rotate(90deg);
}

/* --- Footer réduit --- */
.cs-footer {
    background: var(--ink);
    color: rgba(242, 239, 232, .45);
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: .78rem;
    font-family: 'Inter', sans-serif;
}

@media (min-width: 1024px) {
    .cs-footer {
        padding: 18px 40px;
    }
}

.cs-footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.cs-footer-links a {
    color: rgba(242, 239, 232, .45);
    transition: color .2s;
}

.cs-footer-links a:hover {
    color: var(--coral);
}