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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #e0e0e0;
}

.container {
    background: linear-gradient(145deg, #2a2a2a 0%, #1f1f1f 100%);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 
        0 20px 40px rgba(0,0,0,0.4),
        0 0 0 1px rgba(181, 0, 21, 0.1),
        inset 0 1px 0 rgba(255,255,255,0.1);
    max-width: 500px;
    width: 100%;
    margin: 60px 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(181, 0, 21, 0.2);
}

h2 {
    color: #ffffff;
    margin-bottom: 10px;
    text-align: center;
    font-size: 24px;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

p {
    color: #b0b0b0;
    text-align: center;
    margin-bottom: 30px;
    font-size: 14px;
    line-height: 1.5;
}

.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.form-group {
    flex: 1;
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #e0e0e0;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #404040;
    border-radius: 8px;
    font-size: 16px;
    background: #333333;
    color: #ffffff;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #B50015;
    background: #3a3a3a;
    box-shadow: 
        0 0 0 3px rgba(181, 0, 21, 0.2),
        0 4px 12px rgba(181, 0, 21, 0.1);
    transform: translateY(-1px);
}

.form-group input:hover,
.form-group select:hover {
    border-color: #555555;
    background: #3a3a3a;
}

.form-group select {
    background-color: #333333;
    cursor: pointer;
}

.form-group select option {
    background: #333333;
    color: #ffffff;
    padding: 10px;
}

#submitBtn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #B50015 0%, #e21617 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 
        0 4px 15px rgba(181, 0, 21, 0.3),
        inset 0 1px 0 rgba(255,255,255,0.1);
    position: relative;
    overflow: hidden;
}

#submitBtn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

#submitBtn:hover {
    background: linear-gradient(135deg, #d4001a 0%, #ff1d1f 100%);
    transform: translateY(-2px);
    box-shadow: 
        0 8px 25px rgba(181, 0, 21, 0.4),
        inset 0 1px 0 rgba(255,255,255,0.2);
}

#submitBtn:hover::before {
    left: 100%;
}

#submitBtn:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(181, 0, 21, 0.3);
}

#submitBtn:disabled {
    background: linear-gradient(135deg, #555555 0%, #444444 100%);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

#submitBtn:disabled::before {
    display: none;
}

.message {
    padding: 14px 16px;
    border-radius: 8px;
    margin-top: 20px;
    text-align: center;
    display: none;
    font-weight: 500;
    border: 1px solid;
}

.message.success {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1) 0%, rgba(56, 142, 60, 0.1) 100%);
    color: #81c784;
    border-color: rgba(76, 175, 80, 0.3);
    display: block;
}

.message.error {
    background: linear-gradient(135deg, rgba(244, 67, 54, 0.1) 0%, rgba(211, 47, 47, 0.1) 100%);
    color: #ef5350;
    border-color: rgba(244, 67, 54, 0.3);
    display: block;
}

.spinner {
    display: none;
    width: 22px;
    height: 22px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top: 3px solid #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Amélioration responsive */
@media (max-width: 600px) {
    .container {
        margin: 20px;
        padding: 30px 25px;
        max-width: none;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    h2 {
        font-size: 20px;
    }
    
    .form-group input,
    .form-group select {
        padding: 12px 14px;
        font-size: 16px; /* Évite le zoom sur iOS */
    }
    
    #submitBtn {
        padding: 14px;
        font-size: 15px;
    }
}

/* Scrollbar custom pour les navigateurs webkit */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #1a1a1a;
}

::-webkit-scrollbar-thumb {
    background: #B50015;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #d4001a;
}

/* Animation d'entrée pour le container */
.container {
    animation: slideInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}