:root {
    --bg: #0b1020;
    --panel: #111733;
    --text: #e9ecf1;
    --muted: #9fb0d3;
    --accent: #5aa9e6;
    --accent-2: #91f2ff;
    --ok: #87d37c;
}

* {
    box-sizing: border-box
}

html,
body {
    height: 100%
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Noto Sans, sans-serif;
    background: #ffffff; /* Fond blanc */
    color: #ffffff; /* Texte noir pour rester lisible */
}


.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px
}

.site-header {
    position: sticky;
    top: 0;
    background: rgba(11, 16, 32, .8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #1d2447;
    z-index: 10
}

.nav {
    display: flex;
    gap: 16px;
    align-items: center;
    padding: 12px 16px
}

.nav .brand {
    font-weight: 700;
    text-decoration: none;
    color: var(--text);
    margin-right: auto
}

.nav .link {
    color: var(--muted);
    text-decoration: none;
    padding: 8px 10px;
    border-radius: 10px
}

.nav .link:hover {
    color: var(--text);
    background: #1d2447
}

.nav .link.active {
    color: #101532;
    background: linear-gradient(180deg, var(--accent), var(--accent-2));
    font-weight: 700
}

.hero {
    display: grid;
    gap: 16px;
    padding: 32px;
    border-radius: 20px;
    background: radial-gradient(1200px 400px at 20% -10%, rgba(145, 242, 255, .25), transparent 60%), #0f1430;
    border: 1px solid #1d2447
}

.btn {
    display: inline-block;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid #2b3871;
    background: linear-gradient(180deg, #20307a, #1b295e);
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    cursor: pointer
}

.btn:hover {
    filter: brightness(1.1)
}

.btn-outline {
    background: transparent
}

.card {
    background: #0f1430;
    border: 1px solid #1d2447;
    border-radius: 16px;
    padding: 16px
}

.code {
    background: #0b122e;
    border: 1px solid #1d2447;
    border-radius: 10px;
    padding: 12px;
    overflow: auto
}

.code.small {
    font-size: .9rem
}

.bullets {
    margin: 0;
    padding-left: 18px
}

/* Footer en bleu comme avant */
.site-footer {
    padding: 16px;
    text-align: center;
    color: var(--text);
    border-top: 1px solid #1d2447;
    background: #0b1020;   /* fond bleu foncé */
}

.grid {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 16px
}

.panel {
    background: #0f1430;
    border: 1px solid #1d2447;
    border-radius: 16px;
    padding: 16px
}

label {
    display: grid;
    gap: 6px;
    margin: 10px 0;
    color: var(--muted)
}

input[type=number] {
    width: 100%;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #2b3871;
    background: #0b122e;
    color: var(--text)
}

.buttons {
    display: flex;
    gap: 8px;
    margin: 12px 0
}

.readouts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 8px;
    color: var(--ok)
}

@media (max-width:900px) {
    .grid {
        grid-template-columns: 1fr
    }

    #scene {
        width: 100%;
        height: auto
    }
}