:root {
    --color-rose:#B13E61;
    --color-orange:   #cd6e57;
    --color-dark:   #1a1a2e;
    --color-darker:#0f0f1e;
    --color-light:  #ffffff;
    --color-gray:#a0a0b0;
    --color-gray-light:#e8e8f0;
}

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

body {
    font-family:-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background:   linear-gradient(135deg, var(--color-dark) 0%, var(--color-darker) 100%);
    color:var(--color-light);
    min-height:100vh;
    position:relative;
    overflow-x:hidden;
}

/* Animation des étoiles en arrière-plan - VERSION OPTIMISÉE */
.stars {
    position: fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    pointer-events:none;
    z-index:  0;
    overflow:hidden;
}

.stars:: before {
    content:'';
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:transparent;
    background-image:  
        radial-gradient(1px 1px at 20px 30px, white, transparent),
        radial-gradient(1px 1px at 60px 70px, var(--color-rose), transparent),
        radial-gradient(1px 1px at 130px 80px, #00d4ff, transparent),
        radial-gradient(2px 2px at 200px 150px, var(--color-rose), transparent),
        radial-gradient(1px 1px at 300px 180px, white, transparent),
        radial-gradient(1px 1px at 420px 50px, var(--color-orange), transparent),
        radial-gradient(1px 1px at 520px 140px, #ff00ff, transparent),
        radial-gradient(2px 2px at 30px 350px, var(--color-rose), transparent),
        radial-gradient(1px 1px at 220px 420px, white, transparent),
        radial-gradient(1px 1px at 640px 80px, white, transparent),
        radial-gradient(1px 1px at 760px 320px, #00d4ff, transparent),
        radial-gradient(2px 2px at 880px 250px, white, transparent),
        radial-gradient(1px 1px at 1000px 300px, var(--color-rose), transparent),
        radial-gradient(1px 1px at 1120px 400px, var(--color-orange), transparent),
        radial-gradient(1px 1px at 1300px 220px, #ff00ff, transparent);
    background-size:1500px 850px;
    background-repeat:repeat;
    animation: twinkle 3s infinite alternate;
    will-change:  opacity;
}

.stars::after {
    content:'';
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:transparent;
    background-image: 
        radial-gradient(1px 1px at 110px 110px, var(--color-rose), transparent),
        radial-gradient(1px 1px at 240px 140px, #00d4ff, transparent),
        radial-gradient(2px 2px at 310px 90px, white, transparent),
        radial-gradient(1px 1px at 440px 30px, var(--color-rose), transparent),
        radial-gradient(1px 1px at 570px 110px, #00d4ff, transparent),
        radial-gradient(1px 1px at 690px 60px, var(--color-rose), transparent),
        radial-gradient(1px 1px at 830px 290px, var(--color-orange), transparent),
        radial-gradient(2px 2px at 960px 220px, white, transparent),
        radial-gradient(1px 1px at 1090px 260px, var(--color-orange), transparent),
        radial-gradient(1px 1px at 1230px 340px, #00d4ff, transparent),
        radial-gradient(1px 1px at 1360px 90px, var(--color-rose), transparent),
        radial-gradient(2px 2px at 140px 440px, white, transparent),
        radial-gradient(1px 1px at 340px 330px, var(--color-orange), transparent),
        radial-gradient(1px 1px at 540px 490px, var(--color-rose), transparent),
        radial-gradient(1px 1px at 740px 370px, #00d4ff, transparent);
    background-size:1500px 850px;
    background-repeat:repeat;
    animation:  twinkle 4s infinite alternate;
    animation-delay: 1.5s;
    opacity:0.6;
    will-change: opacity;
}

@keyframes twinkle {
    0%, 100% { opacity:0.2; }
    50% { opacity:1; }
}

.container {
    max-width:  800px;
    margin: 0 auto;
    padding:  40px 20px;
    position:relative;
    z-index: 1;
}

.logo {
    text-align: center;
    margin-bottom: 40px;
}

.logo h1 {
    font-size:2.5rem;
    font-weight:bold;
    background:linear-gradient(135deg, var(--color-rose), var(--color-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color:transparent;
    background-clip:text;
    filter:  drop-shadow(0 0 30px rgba(177, 62, 97, 0.3));
}

.feedback-card {
    background:rgba(255, 255, 255, 0.05);
    backdrop-filter:blur(20px);
    border:1px solid rgba(255, 255, 255, 0.1);
    border-radius:  24px;
    padding: 40px;
    box-shadow:0 20px 60px rgba(0, 0, 0, 0.3);
}

.feedback-header {
    margin-bottom:40px;
    text-align:  center;
}

.feedback-header h2 {
    font-size:2rem;
    margin-bottom:12px;
    background:linear-gradient(135deg, var(--color-rose), var(--color-orange));
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
    background-clip:text;
}

.feedback-header p {
    color:var(--color-gray);
    font-size:1.1rem;
}

.question-group {
    margin-bottom:32px;
}

.question-label {
    display:block;
    font-size:1rem;
    font-weight:600;
    margin-bottom:12px;
    color:var(--color-light);
}

.required {
    color:var(--color-rose);
    margin-left:4px;
}

.input-field,
.textarea-field,
.select-field {
    width:100%;
    padding:  14px 18px;
    background:rgba(255, 255, 255, 0.08);
    border:2px solid rgba(255, 255, 255, 0.1);
    border-radius:12px;
    color:var(--color-light);
    font-size:1rem;
    font-family:inherit;
    transition:all 0.3s ease;
}

.input-field:focus,
.textarea-field:focus,
.select-field:focus {
    outline:none;
    border-color:var(--color-rose);
    background:rgba(255, 255, 255, 0.12);
    box-shadow:0 0 0 4px rgba(177, 62, 97, 0.1);
}

.textarea-field {
    resize:vertical;
    min-height:120px;
}

.select-field {
    cursor:pointer;
    appearance:none;
    background-color:rgba(255, 255, 255, 0.08);
    background-image:url("data: image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat:no-repeat;
    background-position:right 18px center;
    padding-right:45px;
}

.select-field option {
    background-color:var(--color-darker);
    color:var(--color-light);
    padding:10px;
}

.select-field option:hover,
.select-field option:checked {
    background-color:var(--color-rose);
    color:var(--color-light);
}

/* Radio buttons */
.radio-group {
    display:flex;
    flex-direction:column;
    gap:12px;
}

.radio-label {
    display:flex;
    align-items:center;
    padding:14px 18px;
    background:rgba(255, 255, 255, 0.05);
    border:2px solid rgba(255, 255, 255, 0.1);
    border-radius:12px;
    cursor:pointer;
    transition:all 0.3s ease;
    position:relative;
}

.radio-label: hover {
    background:rgba(255, 255, 255, 0.08);
    border-color:rgba(177, 62, 97, 0.3);
}

.radio-label input[type="radio"] {
    position:absolute;
    opacity:0;
    cursor: pointer;
}

.radio-custom {
    width:22px;
    height:22px;
    border:  2px solid rgba(255, 255, 255, 0.3);
    border-radius:50%;
    margin-right:12px;
    position:relative;
    transition: all 0.3s ease;
    flex-shrink:0;
}

.radio-label input[type="radio"]:checked ~ .radio-custom {
    border-color:var(--color-rose);
    background:var(--color-rose);
}

.radio-label input[type="radio"]:checked ~ .radio-custom::after {
    content:'';
    position:absolute;
    top:50%;
    left:  50%;
    transform: translate(-50%, -50%);
    width:8px;
    height:8px;
    background:white;
    border-radius:50%;
}

.radio-label input[type="radio"]:checked ~ span: last-child {
    color:var(--color-rose);
    font-weight:600;
}

/* Slider */
.slider-container {
    padding: 10px 0;
}

.slider {
    -webkit-appearance:none;
    appearance: none;
    width:100%;
    height:8px;
    border-radius:4px;
    background:rgba(255, 255, 255, 0.1);
    outline:none;
    margin-bottom:16px;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance:none;
    appearance:  none;
    width:24px;
    height:24px;
    border-radius:50%;
    background:linear-gradient(135deg, var(--color-rose), var(--color-orange));
    cursor:pointer;
    box-shadow:  0 4px 12px rgba(177, 62, 97, 0.4);
    transition:transform 0.3s ease;
}

.slider::-webkit-slider-thumb:hover {
    transform:scale(1.2);
}

.slider::-moz-range-thumb {
    width:24px;
    height:24px;
    border-radius:50%;
    background:linear-gradient(135deg, var(--color-rose), var(--color-orange));
    cursor:pointer;
    border: none;
    box-shadow: 0 4px 12px rgba(177, 62, 97, 0.4);
    transition:transform 0.3s ease;
}

.slider::-moz-range-thumb: hover {
    transform:scale(1.2);
}

.slider-value {
    display:flex;
    justify-content:space-between;
    color:var(--color-gray);
    font-size:0.9rem;
}

.slider-current {
    font-size:1.5rem;
    font-weight:  bold;
    color:var(--color-rose);
}

/* CAPTCHA */
.captcha-container {
    margin:  32px 0;
    display:flex;
    justify-content:center;
}

/* Bouton de soumission */
.form-actions {
    margin-top:32px;
    display:flex;
    justify-content:center;
}

.btn-submit {
    background:linear-gradient(135deg, var(--color-rose), var(--color-orange));
    color:var(--color-light);
    border:none;
    padding:16px 40px;
    font-size:  1.1rem;
    font-weight:600;
    border-radius:50px;
    cursor:pointer;
    display:flex;
    align-items:center;
    gap:12px;
    transition:all 0.3s ease;
    box-shadow:0 8px 24px rgba(177, 62, 97, 0.3);
}

.btn-submit:hover {
    transform:translateY(-2px);
    box-shadow:0 12px 32px rgba(177, 62, 97, 0.5);
}

.btn-submit:active {
    transform:translateY(0);
}

.btn-submit svg {
    transition:transform 0.3s ease;
}

.btn-submit:hover svg {
    transform:translateX(4px);
}

/* Message de succès/erreur */
.message {
    padding:16px 24px;
    border-radius:  12px;
    margin-bottom:24px;
    text-align:center;
    font-weight:500;
}

.message.success {
    background:rgba(34, 197, 94, 0.1);
    border:2px solid rgba(34, 197, 94, 0.3);
    color:#22c55e;
}

.message.error {
    background:rgba(239, 68, 68, 0.1);
    border:2px solid rgba(239, 68, 68, 0.3);
    color:#ef4444;
}

.no-form {
    text-align:center;
    color:var(--color-gray);
    font-size:1.1rem;
    padding:40px 20px;
}

/* Responsive */
@media (max-width:  768px) {
    .container {
        padding:20px 16px;
    }
    
    .feedback-card {
        padding:24px;
        border-radius:16px;
    }
    
    .logo h1 {
        font-size:2rem;
    }
    
    .feedback-header h2 {
        font-size:1.5rem;
    }
    
    .btn-submit {
        width:100%;
        justify-content:center;
    }
}

/* Message de succès/erreur avec animation */
.message {
    padding: 16px 24px;
    border-radius: 12px;
    margin-bottom: 24px;
    text-align: center;
    font-weight: 500;
    animation:  slideDown 0.3s ease-out;
    transition: all 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform:  translateY(-20px);
    }
    to {
        opacity: 1;
        transform:  translateY(0);
    }
}

.message.success {
    background: rgba(34, 197, 94, 0.1);
    border: 2px solid rgba(34, 197, 94, 0.3);
    color: #22c55e;
    box-shadow: 0 8px 24px rgba(34, 197, 94, 0.2);
}

.message.error {
    background: rgba(239, 68, 68, 0.1);
    border: 2px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.2);
}