/* style.css – Thème clair, bilingue, QR + toggle langue (version clean) */

/* RESET */
* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; scroll-behavior: smooth; }

:root{
    --bg: #f7f9fc;
    --bg-soft: #ffffff;
    --border-subtle: rgba(0,0,0,0.08);

    --accent: #21b6a8;
    --accent-soft: rgba(33,182,168,0.12);

    --text-main: #1f2a37;
    --text-strong: #0f172a;
    --text-muted: #4b5563;

    --shadow-soft: 0 4px 18px rgba(0,0,0,0.05);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
}

body{
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
}

/* =========================
   BILINGUE
   ========================= */
/* Par défaut on affiche FR (si aucun class sur body) */
.lang-fr, .lang-en { display: block; }

body.lang-en .lang-fr { display: none; }
body.lang-en .lang-en { display: block; }

body:not(.lang-en) .lang-fr { display: block; }
body:not(.lang-en) .lang-en { display: none; }

/* =========================
   NAV TOP
   ========================= */
.top-nav{
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 7vw;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 50;
}

.logo{
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
}

.nav-right{
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-hint{
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Toggle langue (1 seule définition, cohérente) */
.lang-toggle{
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-soft);
    padding: 3px;
    display: flex;
    align-items: center;
    gap: 2px;
    cursor: pointer;
    font-size: 0.75rem;
    user-select: none;
}

.lang-toggle span{
    padding: 4px 8px;
    border-radius: 999px;
    min-width: 28px;
    text-align: center;
}

body:not(.lang-en) .lang-toggle span[data-lang="fr"],
body.lang-en .lang-toggle span[data-lang="en"]{
    background: var(--accent);
    color: #fff;
}

body:not(.lang-en) .lang-toggle span[data-lang="en"],
body.lang-en .lang-toggle span[data-lang="fr"]{
    background: transparent;
    color: var(--text-muted);
}

.quit-btn{
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 0.8rem;
    text-decoration: none;
    border: 1px solid #e5e7eb;
    background: #ffffff;
    color: #111827;
}
.quit-btn:hover{ background: #f3f4f6; }

/* =========================
   SLIDES / TYPO
   ========================= */
.slide{
    min-height: 100vh;
    padding: 90px 10vw 64px; /* laisse la place à la top-nav */
    display: flex;
    flex-direction: column;
    justify-content: center;
    scroll-margin-top: 72px;
    background: var(--bg);
}

h1, h2{ margin-bottom: 24px; color: var(--text-strong); font-weight: 700; }

h1{ font-size: clamp(2.4rem, 4vw, 3.2rem); }
h2{ font-size: clamp(1.9rem, 3vw, 2.3rem); }

p{
    font-size: 1.05rem;
    margin-bottom: 12px;
    max-width: 880px;
}

strong{ color: var(--text-strong); }

.tag{
    display: inline-block;
    border-radius: 999px;
    padding: 4px 12px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    border: 1px solid var(--accent);
    margin-bottom: 18px;
    color: var(--accent);
    background: var(--accent-soft);
}

/* =========================
   INTRO + QR
   ========================= */
.intro-layout{
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    align-items: flex-start;
}

.intro-main{ flex: 1 1 320px; }

.intro-qr{
    flex: 0 0 220px;
    display: flex;
    justify-content: center;
}

.qr-card{
    background: var(--bg-soft);
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
    padding: 10px 14px 12px;
    box-shadow: var(--shadow-soft);
    text-align: center;
}

.qr-card img{
    max-width: 170px;
    height: auto;
    display: block;
    margin: 0 auto 8px;
}

.qr-caption{
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* =========================
   GRID / CARDS
   ========================= */
.grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 18px;
}

.card{
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
    padding: 16px 18px 18px;
    background: var(--bg-soft);
    box-shadow: var(--shadow-soft);
    transition: box-shadow 0.2s ease-out, transform 0.15s ease-out;
}

.card:hover{
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.card h3{
    margin-bottom: 8px;
    font-size: 1.25rem;
    color: var(--text-strong);
}

.label{
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 6px;
    color: var(--accent);
    opacity: 0.9;
}

/* Listes propres (sans collision avec les styles globaux) */
.card ul{
    list-style: none;
    margin-top: 6px;
    margin-bottom: 6px;
    padding-left: 0;
    font-size: 0.98rem;
    color: var(--text-main);
}

.card ul li{
    margin-bottom: 6px;
    position: relative;
    padding-left: 14px;
}

.card ul li::before{
    content: "";
    width: 6px; height: 6px;
    border-radius: 999px;
    background: var(--accent);
    position: absolute;
    left: 0;
    top: 0.55em;
}

.footer-note{
    margin-top: 20px;
    font-size: 0.92rem;
    color: var(--text-muted);
}

/* =========================
   ARCH DIAGRAM
   ========================= */
.arch-diagram{
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
}

.arch-node{ text-align: center; padding: 8px 12px; }

.arch-pill{
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-soft);
}

.arch-main{
    border-radius: 14px;
    border: 1px solid var(--accent);
    background: var(--accent-soft);
}

.arch-sub{
    display: block;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.arch-arrow{
    font-size: 1.1rem;
    color: var(--text-muted);
}

.arch-systems{
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.arch-system{
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-soft);
    font-size: 0.9rem;
}

/* =========================
   NEXT BUTTON
   ========================= */
.next-btn{
    position: fixed;
    right: 3vw;
    bottom: 3vh;
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid var(--accent);
    background: var(--accent);
    color: white;
    font-size: 0.9rem;
    cursor: pointer;
    z-index: 60;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 10px 22px rgba(0,0,0,0.08);
    transition: transform 0.15s ease-out, box-shadow 0.15s ease-out;
}

.next-btn:hover{
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(0,0,0,0.15);
}

.next-btn:active{ transform: translateY(0); }

/* =========================
   RESPONSIVE
   ========================= */
@media (max-width: 768px){
    .top-nav{ padding: 0 4vw; }
    .slide{ padding: 72px 6vw 56px; }
    .nav-hint{ display: none; }
    .intro-layout{ flex-direction: column; }
    .intro-qr{ justify-content: flex-start; }
}

.nav-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}