body {
    font-family: Arial, sans-serif;
    min-height: 100vh;
    margin: 0;
    padding: 40px 20px;
    background-image: url('https://images.unsplash.com/photo-1462331940025-496dfbfc7564?w=1600');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    box-sizing: border-box;
}

.container {
    max-width: 560px;
    margin: 0 auto;
}

h1 {
    color: white;
    text-align: center;
    font-size: 28px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.8);
    margin-bottom: 24px;
}

h2 {
    color: white;
    font-size: 18px;
    margin: 0 0 20px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-cle {
    background: rgba(255, 255, 255, 0.15);
    border-left: 4px solid #a78bfa;
    border-radius: 6px;
    padding: 12px 16px;
    color: white;
    font-size: 14px;
    margin-bottom: 20px;
    backdrop-filter: blur(4px);
}

.info-cle strong {
    color: #ddd6fe;
}

.bloc {
    background: rgba(255, 255, 255, 0.12);
    padding: 26px 30px;
    border-radius: 14px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    margin-bottom: 24px;
}

label {
    color: #e0e0e0;
    font-size: 14px;
    display: block;
    margin-bottom: 6px;
}

select, input[type="number"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 6px;
    font-size: 15px;
    box-sizing: border-box;
    background: rgba(255,255,255,0.88);
    color: #222;
}

button {
    background-color: #7c3aed;
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #6d28d9;
}

.resultat {
    margin-top: 18px;
    padding: 14px 16px;
    background: rgba(124, 58, 237, 0.3);
    border-left: 4px solid #a78bfa;
    border-radius: 6px;
    font-size: 18px;
    font-weight: bold;
    color: white;
    text-align: center;
    text-shadow: 0 1px 4px rgba(0,0,0,0.6);
}

.erreur {
    margin-top: 18px;
    padding: 14px 16px;
    background: rgba(220, 38, 38, 0.3);
    border-left: 4px solid #f87171;
    border-radius: 6px;
    font-size: 15px;
    color: #fecaca;
}

.monnaie-ligne {
    display: flex;
    gap: 12px;
}

.monnaie-champ {
    flex: 1;
}

.monnaie-champ select,
.monnaie-champ input {
    width: 100%;
}

.graphique-wrapper {
    position: relative;
    width: 100%;
}

.graphique-loading {
    text-align: center;
    color: #a78bfa;
    font-size: 14px;
    padding: 10px 0;
    letter-spacing: 1px;
}

.live-badge {
    font-size: 11px;
    background: rgba(52, 211, 153, 0.3);
    color: #6ee7b7;
    border: 1px solid #6ee7b7;
    border-radius: 20px;
    padding: 2px 10px;
    font-weight: normal;
    letter-spacing: 0.5px;
}