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

:root {
    --bg-color: #1a1d2e; /* Fond sombre légèrement bleuté */
    --card-color: #222538; /* Couleur des cartes principales */
    --sub-card-color: #1a1a2e; /* Couleur des zones d'ombre/encadrés */
    --text-color: #ffffff; /* Texte principal blanc */
    --subtext-color: #a2a8d3; /* Texte secondaire gris-bleu */
    --accent-blue: #5c67f2; /* Bleu néon pour les lueurs et focus */
    --accent-red-start: #e94560; /* Rouge sombre du bouton */
    --accent-red-end: #f06b7d; /* Rouge corail du bouton */
    --border-color: #0f3460; /* Couleur des bordures standard */
    --font-family: 'Inter', 'Roboto', 'Arial', sans-serif;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #1a1a2e;
    color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.menu-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 100%;
    max-width: 500px;
    padding: 30px;
    background: rgba(22, 33, 62, 0.8);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.back-home {
    text-align: left;
    margin-bottom: 10px;
}

.back-link {
    text-decoration: none;
    color: #a2a8d3;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s;
}

.back-link:hover {
    color: #ffffff;
}

h1 {
    text-align: center;
    margin-bottom: 25px;
    font-weight: 600;
    color: #ffffff;
    font-size: 1.4rem;
    letter-spacing: 1px;
}

.section-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: #a2a8d3;
    letter-spacing: 1.5px;
    margin-top: 15px;
    margin-bottom: 5px;
    padding-left: 5px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 5px;
}

.section-label:first-of-type {
    margin-top: 0;
}

.tool-link {
    display: block;
    text-decoration: none;
    color: #ffffff;
    background: #16213e;
    padding: 20px 25px;
    border-radius: 15px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: left;
}

.tool-link:hover {
    background: #0f3460;
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateX(8px);
}

.secret-link {
    background: linear-gradient(45deg, #16213e, #1a1a2e);
    border: 1px solid rgba(233, 69, 96, 0.4);
}

.secret-link:hover {
    border-color: #e94560;
    box-shadow: 0 0 15px rgba(233, 69, 96, 0.2);
}