/* Global & Mobile First Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #ff4081;
    --background-color: #0d0d1a;
    --surface-color: #1a1a2e;
    --text-color: #e0e0e0;
    --heading-font: 'Press Start 2P', cursive;
    --body-font: 'Poppins', sans-serif;
}

body {
    background: var(--background-color);
    color: var(--text-color);
    font-family: var(--body-font);
    line-height: 1.7;
    padding-top: 70px;
}

header {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    padding: 10px 10px 10px 10px;
    background-color: var(--surface-color);
    border-bottom: 2px solid var(--primary-color);
    text-align: center;
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1202;
    gap: 10px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 48px;
    width: auto;
    margin-bottom: 0;
}

nav, .burger { display: none; }
.burger { display: flex; margin-left: auto; }
#mainNav { display: flex; }

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1em;
    padding: 8px 0;
    border-radius: 6px;
    transition: background 0.2s, color 0.2s;
}

nav a:hover {
    color: var(--primary-color);
    background: rgba(255,64,129,0.08);
}

.hero {
    background: linear-gradient(rgba(13, 13, 26, 0.85), rgba(13, 13, 26, 0.85)), url('https://images.unsplash.com/photo-1511512578047-dfb367046420?auto=format&fit=crop&w=1500&q=80') no-repeat center center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 10px 30px 10px;
    min-height: 60vh;
    position: relative;
}

.hero-content h1 {
    font-family: var(--heading-font);
    font-size: 1.2em;
    margin-bottom: 18px;
    line-height: 1.3;
    text-shadow: 0 0 8px var(--primary-color);
}

.hero-content p {
    font-size: 1em;
    margin-bottom: 22px;
}

.cta-button {
    display: inline-block;
    padding: 13px 22px;
    background: var(--primary-color);
    color: #fff;
    font-weight: bold;
    text-decoration: none;
    border-radius: 50px;
    transition: background 0.3s, transform 0.3s, box-shadow 0.3s;
    font-size: 1em;
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 10px rgba(255, 64, 129, 0.3);
}

.cta-button:hover {
    background: transparent;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 0 18px rgba(255, 64, 129, 0.5);
}

/* Bouton flottant mobile */
.floating-cta {
    display: flex;
    justify-content: center;
    align-items: center;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    background: rgba(13, 13, 26, 0.98);
    padding: 12px 0 18px 0;
    box-shadow: 0 -2px 16px rgba(0,0,0,0.18);
}
.floating-cta .cta-button {
    font-size: 1.1em;
    padding: 15px 32px;
    box-shadow: 0 2px 16px rgba(255,64,129,0.18);
}

.about,
.features,
.join {
    padding: 36px 10px 24px 10px;
    max-width: 100vw;
    margin: auto;
    text-align: center;
}

.about h2,
.features h2,
.join h2 {
    font-family: var(--heading-font);
    font-size: 1.1em;
    margin-bottom: 18px;
    color: var(--primary-color);
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 18px;
    align-items: center;
    text-align: left;
}

.about-content img {
    width: 100%;
    max-width: 350px;
    border-radius: 10px;
    box-shadow: 0 6px 12px rgba(0,0,0,0.18);
}

.features ul {
    list-style: none;
    padding: 0;
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.features li {
    background: var(--surface-color);
    padding: 15px;
    border-radius: 10px;
    font-size: 0.98em;
    border-left: 4px solid var(--primary-color);
}

footer {
    background: var(--surface-color);
    text-align: center;
    padding: 16px 0 70px 0; /* espace pour le bouton flottant */
    font-size: 0.9em;
    color: #888;
    margin-top: 20px;
}

/* Tablette (>=600px) */
@media (min-width: 600px) {
    header {
        padding: 18px 30px 12px 30px;
    }
    .logo img {
        height: 70px;
    }
    nav {
        flex-direction: row;
        justify-content: center;
        gap: 18px;
    }
    .hero {
        padding: 60px 30px 40px 30px;
        min-height: 60vh;
    }
    .hero-content h1 {
        font-size: 1.7em;
    }
    .about-content img {
        max-width: 420px;
    }
    .about,
    .features,
    .join {
        padding: 50px 30px 30px 30px;
    }
    .features ul {
        gap: 16px;
    }
    .features li {
        font-size: 1.05em;
        padding: 20px;
    }
}

/* Desktop (>=900px) */
@media (min-width: 900px) {
    header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 10px 50px;
        text-align: left;
    }
    .logo img {
        height: 100px;
        margin-bottom: 0;
    }
    nav {
        flex-direction: row;
        gap: 30px;
        width: auto;
    }
    .hero {
        min-height: 80vh;
        padding: 80px 50px 60px 50px;
    }
    .hero-content h1 {
        font-size: 2.5em;
        text-shadow: 0 0 10px var(--primary-color);
    }
    .hero-content p {
        font-size: 1.2em;
        margin-bottom: 40px;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }
    .about,
    .features,
    .join {
        padding: 80px 40px 40px 40px;
        max-width: 1200px;
    }
    .about h2,
    .features h2,
    .join h2 {
        font-size: 1.8em;
        margin-bottom: 40px;
    }
    .about-content {
        flex-direction: row;
        gap: 50px;
        text-align: left;
    }
    .about-content img {
        max-width: 500px;
    }
    .features ul {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 20px;
    }
    .features li {
        flex: 1 1 40%;
        font-size: 1.1em;
        padding: 25px;
        border-left: 5px solid var(--primary-color);
        transition: transform 0.3s, box-shadow 0.3s;
    }
    .features li:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
    }
    footer {
        padding: 25px 0 70px 0;
        margin-top: 40px;
    }
    .burger { display: none !important; }
    #mainNav {
        position: static;
        flex-direction: row;
        background: none;
        transform: none;
        opacity: 1;
        pointer-events: auto;
        gap: 0;
        height: auto;
        justify-content: flex-end;
        align-items: center;
    }
    #mainNav a {
        font-size: 1.1em;
        margin-left: 25px;
        background: none;
        padding: 0;
    }
    .close-nav { display: none; }
    .nav-signup-btn {
        margin-left: 30px;
        margin-top: 0;
        font-size: 1.08em;
        padding: 10px 32px;
    }
}

@media (min-width: 900px) {
    .floating-cta {
        display: none;
    }
}

/* --- MENU BURGER --- */
.burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1201;
    margin-left: auto;
}
.burger span {
    display: block;
    width: 28px;
    height: 4px;
    background: var(--primary-color);
    margin: 4px 0;
    border-radius: 2px;
    transition: 0.3s;
}

#mainNav {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(13,13,26,0.98);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    z-index: 1200;
    transform: translateY(-100%);
    transition: transform 0.35s cubic-bezier(.77,0,.18,1);
    opacity: 0;
    pointer-events: none;
}
#mainNav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}
#mainNav a {
    font-size: 1.5em;
    color: var(--text-color);
    padding: 12px 0;
    border-radius: 8px;
    background: none;
    transition: background 0.2s, color 0.2s;
    text-align: center;
}
#mainNav a:hover {
    color: var(--primary-color);
    background: rgba(255,64,129,0.08);
}
.close-nav {
    position: absolute;
    top: 24px;
    right: 24px;
    background: none;
    border: none;
    font-size: 2.2em;
    color: var(--primary-color);
    cursor: pointer;
}

.nav-signup-btn {
    display: inline-block;
    background: var(--primary-color);
    color: #fff !important;
    font-weight: bold;
    border-radius: 30px;
    padding: 10px 26px;
    margin-left: 0;
    margin-top: 10px;
    font-size: 1.1em;
    border: none;
    text-align: center;
    text-decoration: none;
    box-shadow: 0 2px 10px rgba(255,64,129,0.10);
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}
.nav-signup-btn:hover {
    background: #fff;
    color: var(--primary-color) !important;
    box-shadow: 0 4px 18px rgba(255,64,129,0.18);
}

.header-signup-btn {
    margin-left: 10px;
    margin-right: 0;
    padding: 10px 22px;
    font-size: 1em;
    height: 40px;
    align-self: center;
}
@media (max-width: 899px) {
    .header-signup-btn {
        margin-left: auto;
        margin-right: 0;
        font-size: 1em;
        padding: 9px 18px;
        height: 38px;
        display: flex;
        align-items: center;
    }
    #mainNav.open ~ .header-signup-btn {
        display: none;
    }
}
@media (min-width: 900px) {
    .header-signup-btn {
        margin-left: 30px;
        font-size: 1.08em;
        padding: 10px 32px;
        height: 44px;
        display: flex;
        align-items: center;
    }
}