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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden; /* scroll horizontal seulement */
    font-family: 'Orbitron', sans-serif;
    background: #03030a; /* bleu nuit très foncé */
    background-image: 
        repeating-linear-gradient(0deg, rgba(255,255,255,0.1) 0, rgba(255,255,255,0.1) 1px, transparent 1px, transparent 40px),
        repeating-linear-gradient(90deg, rgba(255,255,255,0.1) 0, rgba(255,255,255,0.1) 1px, transparent 1px, transparent 40px);
    background-size: 40px 40px; /* taille des cellules de la grille */
    color: white;
}

:root {
    color-scheme: dark;
}

html {
    color-profile: sRGB;
}


/* =========================
   MAIN HERO
========================= */
.landing-main {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    z-index: 2;
    position: relative;
}

.landing-frame {
    padding: 150px 350px;
    border: 3px solid white;
    border-radius: 20px;
    display: inline-block;
    box-shadow: 0 0 20px rgb(123, 189, 255);
}

.logo img {
    height: 250px;
    width: auto;
    filter: drop-shadow(0 0 2px #0ff) drop-shadow(0 0 2px rgb(237, 135, 237)) drop-shadow(0 0 20px rgb(123, 189, 255));
    transition: filter 0.3s ease;
    margin-bottom: 20px;
    margin-top: -20px;
}

.hero-title {
    font-family: 'Planet Kosmos';
    font-size: 6rem;
    text-shadow: 0 0 10px #0ff, 0 0 20px #f0f, 0 0 30px #0ff;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgb(237,135,237);
    text-shadow: 0 0 30px #f0f;
    margin-bottom: 40px;
}

/* =========================
   BUTTON
========================= */
.enter-button {
    display: inline-block;
    padding: 15px 40px;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    color: rgb(123, 189, 255);
    border: 2px solid rgb(123, 189, 255);
    border-radius: 30px;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: 0.3s;
}

.enter-button:hover {
    background: rgb(123, 189, 255);
    color: #03030a;
    box-shadow: 0 0 10px #0ff, 0 0 20px #f0f, 0 0 30px #0ff;
}

/* =========================
   RESPONSIVE MOBILE
========================= */
@media (max-width: 768px) {
    html, body {
        background-size: 20px 20px;
    }

    .landing-frame {
        padding: 60px 40px;
        border: 2px solid white;
    }

    .logo img {
        height: 120px;
        margin-bottom: 15px;
        margin-top: -10px;
    }

    .hero-title {
        font-size: 2.5rem;
        margin-bottom: 15px;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .enter-button {
        font-size: 0.9rem;
        padding: 12px 30px;
        letter-spacing: 1.5px;
    }
}

@media (max-width: 480px) {
    .landing-frame {
        padding: 40px 25px;
        margin: 0 20px;
    }

    .logo img {
        height: 90px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
        margin-bottom: 25px;
    }

    .enter-button {
        font-size: 0.8rem;
        padding: 10px 25px;
        letter-spacing: 1px;
    }
}

/* Orientation paysage sur mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .landing-frame {
        padding: 30px 50px;
    }

    .logo img {
        height: 60px;
    }

    .hero-title {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }

    .hero-subtitle {
        font-size: 0.8rem;
        margin-bottom: 15px;
    }

    .enter-button {
        font-size: 0.75rem;
        padding: 8px 20px;
    }
}