/* ── Accueil laboratoire — Seuil + Atelier (C+B+D) ── */

.page-home--lab {
    --lab-ink: var(--text);
    --lab-muted: var(--text-muted);
    --lab-soft: var(--text-muted-soft);
    --lab-line: var(--border);
    --lab-paper: var(--bg-card);
    --lab-haze: rgba(8, 12, 22, 0.55);
    --lab-glow: rgba(148, 163, 184, 0.12);
    --lab-note: rgba(240, 244, 255, 0.06);
    --lab-note-border: rgba(148, 163, 184, 0.28);
}

html[data-theme="day"] .page-home--lab,
html[data-theme="auto"][data-theme-effective="day"] .page-home--lab {
    --lab-haze: rgba(255, 255, 255, 0.42);
    --lab-glow: rgba(30, 58, 138, 0.08);
    --lab-note: rgba(12, 18, 34, 0.04);
    --lab-note-border: rgba(93, 112, 145, 0.28);
}

.page-home--lab .home-bg-deco {
    opacity: 0.08;
}

.page-home--lab[data-lab-state="threshold"] {
    overflow: hidden;
}

.page-home--lab[data-lab-state="threshold"] .lab-header {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.page-home--lab[data-lab-state="atelier"] .lab-header {
    opacity: 1;
    pointer-events: auto;
    transition: opacity 0.7s ease 0.15s;
}

/* ── Seuil ── */
.lab-threshold {
    position: fixed;
    inset: 0;
    z-index: 220;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(24px, 5vw, 48px);
    background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-deep) 55%, var(--bg-gradient-end) 100%);
    transition: opacity 0.75s ease, transform 0.75s ease, visibility 0.75s;
}

.lab-threshold.is-leaving {
    opacity: 0;
    transform: translateY(-18px);
    visibility: hidden;
    pointer-events: none;
}

.page-home--lab[data-lab-state="atelier"] .lab-threshold {
    display: none;
}

.lab-threshold__atmosphere {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.lab-threshold__haze {
    position: absolute;
    inset: -20%;
    background:
        radial-gradient(ellipse 70% 55% at 50% 42%, var(--lab-glow) 0%, transparent 70%),
        radial-gradient(ellipse 50% 40% at 20% 80%, rgba(56, 80, 120, 0.18) 0%, transparent 65%),
        radial-gradient(ellipse 45% 35% at 82% 18%, rgba(100, 116, 139, 0.14) 0%, transparent 60%);
    filter: blur(2px);
}

.lab-threshold__grain {
    position: absolute;
    inset: 0;
    opacity: 0.22;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
    mix-blend-mode: soft-light;
}

.lab-threshold__glow {
    position: absolute;
    left: 50%;
    top: 46%;
    width: min(520px, 80vw);
    height: min(280px, 40vh);
    transform: translate(-50%, -50%);
    background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.06) 0%, transparent 72%);
}

.lab-threshold__content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 28rem;
}

.lab-threshold__eyebrow {
    margin: 0 0 1.1rem;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--lab-soft);
}

.lab-threshold__title {
    margin: 0;
    font-size: clamp(2.4rem, 7vw, 3.6rem);
    font-weight: 600;
    letter-spacing: -0.045em;
    line-height: 1.05;
    color: var(--lab-ink);
}

.lab-threshold__line {
    margin: 1.25rem 0 0;
    font-size: clamp(1.05rem, 2.6vw, 1.25rem);
    line-height: 1.45;
    color: var(--lab-muted);
    letter-spacing: -0.015em;
}

.lab-threshold__enter {
    margin-top: 2.4rem;
    appearance: none;
    border: 1px solid var(--btn-primary-border);
    cursor: pointer;
    font: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    padding: 0.95rem 1.85rem;
    border-radius: 999px;
    background: var(--btn-primary-bg);
    color: var(--text);
    transition: transform 0.25s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.lab-threshold__enter:hover {
    transform: translateY(-1px);
    background: var(--btn-primary-bg-hover);
    border-color: var(--btn-primary-border-hover);
}

/* Jour : pas de remplissage cyan plein — texte restait illisible */
html[data-theme="day"] .lab-threshold__enter:hover,
html[data-theme="auto"][data-theme-effective="day"] .lab-threshold__enter:hover {
    background: #ffffff;
    border-color: var(--accent-dim, #0891b2);
    color: var(--text);
    box-shadow: 0 8px 22px rgba(12, 18, 34, 0.08);
}

.lab-threshold__enter:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.lab-threshold__hint {
    margin: 1rem 0 0;
    font-size: 0.75rem;
    color: var(--lab-soft);
    letter-spacing: 0.04em;
}

/* ── Atelier ── */
.lab-main {
    outline: none;
}

.lab-main:not([hidden]) {
    animation: lab-atelier-in 0.9s ease both;
}

@keyframes lab-atelier-in {
    from {
        opacity: 0;
        transform: translateY(22px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lab-atelier {
    max-width: min(40rem, 92%);
    margin: 0 auto;
    padding: clamp(28px, 6vw, 56px) 0 clamp(64px, 10vw, 96px);
    text-align: center;
}

.lab-portrait {
    margin: 0 auto 1.35rem;
    width: 96px;
}

.lab-portrait__frame {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    overflow: hidden;
    border: 1px solid var(--lab-line);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
}

.lab-portrait__photo {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.lab-role {
    margin: 0 0 1.75rem;
    font-size: 0.92rem;
    color: var(--lab-muted);
    letter-spacing: -0.01em;
}

.lab-welcome {
    margin: 0;
    font-size: clamp(1.55rem, 4.2vw, 2.15rem);
    font-weight: 600;
    letter-spacing: -0.035em;
    line-height: 1.2;
    color: var(--lab-ink);
}

.lab-playground {
    margin: 0.85rem 0 0;
    font-size: 1.05rem;
    color: var(--lab-muted);
    letter-spacing: -0.015em;
    font-style: italic;
}

.lab-manifesto {
    margin: 2.4rem auto 0;
    max-width: 38ch;
    text-align: left;
}

.lab-manifesto p {
    margin: 0 0 1.15rem;
    font-size: 1.02rem;
    line-height: 1.55;
    color: var(--lead-color, var(--lab-muted));
    letter-spacing: -0.01em;
}

.lab-manifesto__common {
    color: var(--lab-ink) !important;
    font-weight: 500;
}

/* ── Cycle ── */
.lab-cycle {
    list-style: none;
    margin: 2.2rem auto 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
}

.lab-cycle__step {
    margin: 0;
    font-size: clamp(1.35rem, 3.5vw, 1.75rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--lab-ink);
    opacity: 0.22;
    transition: opacity 1.1s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
}

.lab-cycle__step.is-active,
.lab-cycle__step.is-done {
    opacity: 1;
}

.lab-cycle__arrow {
    display: block;
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--lab-soft);
    opacity: 0.7;
    line-height: 1;
}

.lab-signature {
    margin: 2.6rem auto 0;
    max-width: 22em;
    font-size: clamp(1.15rem, 2.8vw, 1.35rem);
    font-weight: 500;
    line-height: 1.4;
    letter-spacing: -0.02em;
    color: var(--lab-ink);
}

/* ── Annotations carnet ── */
.lab-notes {
    list-style: none;
    margin: 2.4rem 0 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.55rem;
}

.lab-notes li {
    margin: 0;
    padding: 0.35rem 0.75rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--lab-soft);
    background: var(--lab-note);
    border: 1px solid var(--lab-note-border);
    border-radius: 4px;
}

/* ── Terrain / états ── */
.lab-terrain {
    margin: 3rem 0 0;
    padding-top: 2.2rem;
    border-top: 1px solid var(--lab-line);
}

.lab-terrain__title {
    margin: 0 0 0.85rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--lab-soft);
}

.lab-terrain__lead {
    margin: 0 auto;
    max-width: 36em;
    font-size: 0.98rem;
    line-height: 1.5;
    color: var(--lab-muted);
    letter-spacing: -0.01em;
}

.lab-cta {
    margin-top: 2.2rem;
}

.lab-credo {
    margin: 2.8rem auto 0;
    max-width: 28em;
    font-size: 1.02rem;
    line-height: 1.5;
    letter-spacing: -0.015em;
    color: var(--lab-muted);
    font-style: italic;
}

.lab-cta__btn,
.lab-cta__btn:visited {
    display: inline-block;
    padding: 0.95rem 1.6rem;
    font-size: 0.98rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    text-decoration: none;
    color: var(--text);
    background: var(--btn-primary-bg);
    border: 1px solid var(--btn-primary-border);
    border-radius: 999px;
    transition: transform 0.25s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.lab-cta__btn:hover {
    transform: translateY(-1px);
    text-decoration: none;
    background: var(--btn-primary-bg-hover);
    border-color: var(--btn-primary-border-hover);
    color: var(--text);
}

html[data-theme="day"] .lab-cta__btn:hover,
html[data-theme="day"] .lab-cta__btn:visited:hover,
html[data-theme="auto"][data-theme-effective="day"] .lab-cta__btn:hover,
html[data-theme="auto"][data-theme-effective="day"] .lab-cta__btn:visited:hover {
    background: #ffffff;
    border-color: var(--accent-dim, #0891b2);
    color: var(--text);
    box-shadow: 0 8px 22px rgba(12, 18, 34, 0.08);
}

.lab-cta__btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.lab-footer {
    min-height: 0;
}

.page-home--lab .lab-main {
    padding-top: clamp(12px, 3vw, 24px);
}

.page-home--lab[data-lab-state="threshold"] .home-bg-deco {
    opacity: 0.04;
}

@media (max-width: 640px) {
    .lab-manifesto {
        text-align: center;
    }

    .lab-threshold__enter {
        width: min(100%, 280px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .lab-threshold,
    .lab-threshold.is-leaving,
    .lab-main:not([hidden]),
    .lab-cycle__step,
    .lab-threshold__enter,
    .lab-cta__btn,
    .page-home--lab[data-lab-state="threshold"] .lab-header,
    .page-home--lab[data-lab-state="atelier"] .lab-header {
        transition: none !important;
        animation: none !important;
    }

    .lab-threshold.is-leaving {
        transform: none;
    }
}