/* Page d'accueil KUTUMA — charte MITC (https://www.mulangane.net/).
   Fond quasi blanc parcouru d'un dégradé bleu pâle, comme sur le site MITC.
   Le texte et le logo passent donc en foncé. */

@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&family=Syne:wght@600;700;800&display=swap");

:root {
    --app-blue: #2e5191;
    --app-blue-deep: #1d3562;
    --app-accent: #589cdb;
    --app-ink: #1f2a37;
    --app-ink-soft: #4b5869;
    --app-white: #ffffff;
    --app-tint-1: #eef6fd;
    --app-tint-2: #d9e9f7;
    --app-tint-3: #c3daf1;
    --app-line: rgba(46, 81, 145, 0.14);
    --app-font-display: "Syne", sans-serif;
    --app-font-body: "Manrope", sans-serif;
}

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

html,
body.app-landing {
    margin: 0;
    font-family: var(--app-font-body);
    color: var(--app-ink);
    background: var(--app-white);
}

/* La page tient dans un seul écran : bannière extensible, pied de page collé
   en bas, sans défilement. */
body.app-landing {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
}

body.app-landing > main {
    flex: 1 1 auto;
    display: flex;
    min-height: 0;
}

/* ------------------------------------------------------------ navigation -- */

.app-nav {
    position: fixed;
    inset: 0 0 auto;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem clamp(1.25rem, 4vw, 3rem);
    transition: background 0.35s ease, backdrop-filter 0.35s ease, box-shadow 0.35s ease;
}

.app-nav.is-scrolled {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(10px);
    box-shadow: 0 6px 20px rgba(29, 53, 98, 0.08);
}

.app-nav__brand img {
    display: block;
    height: 42px;
    width: auto;
}

.app-nav__actions {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

/* ---------------------------------------------------------------- boutons -- */

.app-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    min-height: 2.6rem;
    padding: 0.55rem 1.35rem;
    border-radius: 0.4rem;
    border: 1px solid transparent;
    font-family: var(--app-font-body);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease,
        border-color 0.2s ease, box-shadow 0.2s ease;
}

.app-btn:hover {
    transform: translateY(-1px);
}

.app-btn--ghost {
    color: var(--app-blue);
    border-color: var(--app-line);
    background: rgba(255, 255, 255, 0.75);
}

.app-btn--ghost:hover {
    color: var(--app-blue-deep);
    border-color: var(--app-accent);
    background: #fff;
}

.app-btn--solid,
.app-btn--primary {
    color: #fff;
    background: var(--app-blue);
    box-shadow: 0 10px 26px rgba(46, 81, 145, 0.24);
}

.app-btn--solid:hover,
.app-btn--primary:hover {
    color: #fff;
    background: var(--app-blue-deep);
    box-shadow: 0 12px 30px rgba(46, 81, 145, 0.3);
}

/* --------------------------------------------------------------- bannière -- */

.app-hero {
    position: relative;
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    color: var(--app-ink);
}

/* Dégradé bleu pâle en diagonale, ponctué de halos, à la manière du site MITC. */
.app-hero__media {
    position: absolute;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(70% 60% at 4% 6%, var(--app-tint-3) 0%, rgba(195, 218, 241, 0) 58%),
        radial-gradient(55% 55% at 98% 92%, var(--app-tint-2) 0%, rgba(217, 233, 247, 0) 62%),
        linear-gradient(135deg, var(--app-white) 0%, var(--app-tint-1) 45%, var(--app-tint-2) 100%);
    animation: app-veil-in 1.2s ease both;
}

.app-hero__veil {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: radial-gradient(58% 52% at 86% 16%, rgba(88, 156, 219, 0.22) 0%, rgba(88, 156, 219, 0) 62%);
}

.app-hero__content {
    position: relative;
    z-index: 2;
    width: min(720px, 100%);
    padding: clamp(5.5rem, 11vh, 7rem) clamp(1.25rem, 4vw, 3rem) clamp(1.5rem, 4vh, 2.5rem);
}

.app-hero__wordmark {
    position: relative;
    display: inline-block;
    margin: 0 0 1.35rem;
    padding-bottom: 0.55rem;
    font-family: var(--app-font-display);
    font-size: clamp(1.45rem, 3.4vw, 2.1rem);
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--app-blue);
    animation: app-fade-up 0.9s ease both;
}

/* Filet d'accent sous le nom, dans le bleu clair du logo. */
.app-hero__wordmark::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 3.25rem;
    height: 3px;
    border-radius: 2px;
    background: var(--app-accent);
}

.app-hero__title {
    margin: 0 0 0.85rem;
    font-family: var(--app-font-display);
    font-size: clamp(1.85rem, 4.6vw, 3.15rem);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.02em;
    max-width: 16ch;
    color: var(--app-ink);
    animation: app-fade-up 0.9s ease 0.22s both;
}

.app-hero__lead {
    margin: 0 0 1.75rem;
    max-width: 36ch;
    font-size: clamp(1rem, 2.1vw, 1.2rem);
    line-height: 1.55;
    color: var(--app-ink-soft);
    animation: app-fade-up 0.9s ease 0.32s both;
}

.app-hero__cta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    animation: app-fade-up 0.9s ease 0.42s both;
}

/* ----------------------------------------------------------- pied de page -- */

.app-footer {
    background: var(--app-white);
    border-top: 1px solid var(--app-line);
    color: var(--app-ink-soft);
    padding: 1.25rem clamp(1.25rem, 4vw, 3rem);
}

.app-footer__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1.5rem;
    font-size: 0.875rem;
}

.app-footer a {
    color: var(--app-ink-soft);
    text-decoration: none;
}

.app-footer a:hover {
    color: var(--app-blue);
}

.app-footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem 1.15rem;
}

/* ------------------------------------------------------------- animations -- */

@keyframes app-fade-up {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes app-veil-in {
    from { opacity: 0.55; }
    to   { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
    .app-hero__media,
    .app-hero__wordmark,
    .app-hero__title,
    .app-hero__lead,
    .app-hero__cta {
        animation: none;
    }
}

@media (max-width: 575.98px) {
    .app-nav__brand img {
        height: 34px;
    }

    .app-btn {
        width: 100%;
    }

    .app-hero__cta {
        width: 100%;
    }
}