/* JAOS — Landing jaos.fr (léger, dark premium) */

:root {
    --jaos-bg: #050816;
    --jaos-surface: #111827;
    --jaos-surface-2: #1a2235;
    --jaos-border: color-mix(in srgb, var(--jaos-primary) 16%, transparent);
    --jaos-text: #ffffff;
    --jaos-muted: color-mix(in srgb, var(--jaos-text) 65%, var(--jaos-surface));
    --jaos-primary: #7c4dff;
    --jaos-violet: var(--jaos-primary);
    --jaos-violet-light: #a855f7;
    --jaos-blue: #6366f1;
    --jaos-radius: 16px;
    --jaos-max: 1120px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100dvh;
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--jaos-text);
    background: var(--jaos-bg);
    -webkit-font-smoothing: antialiased;
}

.jaos-page {
    position: relative;
    overflow-x: hidden;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

/* Fond dégradé violet / bleu */
.jaos-page::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse 80% 50% at 20% -10%, color-mix(in srgb, var(--jaos-primary) 22%, transparent), transparent 55%),
        radial-gradient(ellipse 60% 40% at 90% 10%, color-mix(in srgb, var(--jaos-blue) 14%, transparent), transparent 50%),
        radial-gradient(ellipse 50% 30% at 50% 100%, color-mix(in srgb, var(--jaos-violet-light) 8%, transparent), transparent 45%),
        var(--jaos-bg);
}

.jaos-wrap {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: var(--jaos-max);
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* ── Hero ── */
.jaos-hero {
    padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(3rem, 8vw, 5rem);
    text-align: center;
}

/* Logo officiel : élément principal */
.jaos-hero__logo-wrap {
    position: relative;
    width: min(320px, 88vw);
    margin: 0 auto clamp(1.75rem, 4vw, 2.5rem);
}

.jaos-hero__logo-wrap::before {
    content: '';
    position: absolute;
    inset: -12% -8%;
    z-index: -1;
    background: radial-gradient(
        ellipse 70% 55% at 50% 42%,
        rgba(99, 102, 241, 0.38) 0%,
        rgba(96, 165, 250, 0.12) 45%,
        transparent 72%
    );
    pointer-events: none;
}

.jaos-hero__logo {
    display: block;
    width: 100%;
    height: auto;
    margin: 0 auto;
    filter: drop-shadow(0 0 48px rgba(99, 102, 241, 0.28));
}

@media (min-width: 640px) {
    .jaos-hero__logo-wrap {
        width: min(460px, 85vw);
    }
}

@media (min-width: 1024px) {
    .jaos-hero__logo-wrap {
        width: min(620px, 68vw);
    }
}

.jaos-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.jaos-desc {
    margin: 0 auto clamp(1.75rem, 4vw, 2.25rem);
    max-width: 26rem;
    font-size: clamp(1rem, 2.2vw, 1.125rem);
    line-height: 1.55;
    color: var(--jaos-muted);
}

.jaos-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.1rem;
    min-width: 12rem;
    padding: 0 2.25rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    color: #fff;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    background: linear-gradient(135deg, var(--jaos-violet) 0%, #4f46e5 50%, var(--jaos-blue) 100%);
    box-shadow: 0 4px 24px rgba(99, 102, 241, 0.4);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.jaos-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.5);
}

.jaos-cta:focus-visible {
    outline: 2px solid var(--jaos-violet-light);
    outline-offset: 3px;
}

/* ── Features ── */
.jaos-features {
    padding: 2rem 0 4rem;
}

.jaos-features__title {
    margin: 0 0 1.75rem;
    text-align: center;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--jaos-muted);
}

.jaos-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 640px) {
    .jaos-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .jaos-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 1.25rem;
    }
}

.jaos-card {
    padding: 1.35rem 1.25rem;
    border-radius: var(--jaos-radius);
    background: var(--jaos-surface);
    border: 1px solid var(--jaos-border);
    transition: border-color 0.2s ease, background 0.2s ease;
}

.jaos-card:hover {
    background: var(--jaos-surface-2);
    border-color: rgba(99, 102, 241, 0.25);
}

.jaos-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    margin-bottom: 0.85rem;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(96, 165, 250, 0.12));
    color: var(--jaos-violet-light);
}

.jaos-card__icon svg {
    width: 1.25rem;
    height: 1.25rem;
}

.jaos-card__title {
    margin: 0 0 0.35rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--jaos-text);
}

.jaos-card__text {
    margin: 0;
    font-size: 0.875rem;
    color: var(--jaos-muted);
    line-height: 1.5;
}

/* ── Footer ── */
.jaos-footer {
    margin-top: auto;
    padding: 2rem 0 calc(2rem + env(safe-area-inset-bottom, 0px));
    text-align: center;
    border-top: 1px solid var(--jaos-border);
}

.jaos-footer__brand {
    margin: 0 0 0.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--jaos-text);
}

.jaos-footer__brand span {
    color: var(--jaos-gold);
}

.jaos-footer__copy {
    margin: 0;
    font-size: 0.8rem;
    color: var(--jaos-muted);
}