.form-container {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 80vh;
            padding: 20px;
        }

        .card {
            background: white;
            border-radius: 15px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            padding: 40px;
            max-width: 500px;
            width: 100%;
            animation: slideIn 0.6s ease-out;
        }

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

        .card h2 {
            color: #333;
            margin-bottom: 10px;
            text-align: center;
        }

        .card p {
            color: #666;
            text-align: center;
            margin-bottom: 30px;
            font-size: 14px;
        }

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

        label {
            display: block;
            color: #333;
            font-weight: 600;
            margin-bottom: 8px;
            font-size: 14px;
        }

        .required {
            color: #e74c3c;
        }

        input[type="text"],
        input[type="email"],
        textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-family: inherit;
            font-size: 14px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        input[type="text"]:focus,
        input[type="email"]:focus,
        textarea:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

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

        button {
            width: 100%;
            padding: 12px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            margin-top: 20px;
        }

        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
        }

        button:active {
            transform: translateY(0);
        }

        /* Popup Styles */
        .popup-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            justify-content: center;
            align-items: center;
            z-index: 1000;
            animation: fadeIn 0.3s ease-out;
        }

        .popup-overlay.active {
            display: flex;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
            }
            to {
                opacity: 1;
            }
        }

        .popup-content {
            background: white;
            border-radius: 20px;
            padding: 40px;
            text-align: center;
            max-width: 400px;
            width: 90%;
            box-shadow: 0 30px 80px rgba(0, 0, 0, 0.3);
            animation: popupZoom 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        @keyframes popupZoom {
            from {
                opacity: 0;
                transform: scale(0.3) rotateZ(-10deg);
            }
            to {
                opacity: 1;
                transform: scale(1) rotateZ(0deg);
            }
        }

        .checkmark {
            width: 80px;
            height: 80px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            justify-content: center;
            align-items: center;
            animation: checkmarkPulse 0.6s ease-out 0.2s backwards;
        }

        @keyframes checkmarkPulse {
            0% {
                transform: scale(0);
            }
            50% {
                transform: scale(1.2);
            }
            100% {
                transform: scale(1);
            }
        }

        .checkmark::after {
            content: '✓';
            color: white;
            font-size: 50px;
            font-weight: bold;
            animation: checkmarkDraw 0.4s ease-out 0.4s backwards;
        }

        @keyframes checkmarkDraw {
            from {
                opacity: 0;
                transform: scale(0);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .popup-content h3 {
            color: #333;
            margin-bottom: 10px;
            font-size: 24px;
        }

        .popup-content p {
            color: #666;
            margin-bottom: 25px;
            font-size: 14px;
        }

        .popup-close-btn {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            margin-top: 10px;
        }

        .popup-close-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
        }

        /* Fun animations */
        @keyframes bounce {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-10px);
            }
        }

        @keyframes shake {
            0%, 100% {
                transform: translateX(0);
            }
            25% {
                transform: translateX(-5px);
            }
            75% {
                transform: translateX(5px);
            }
        }

        @keyframes float {
            0%, 100% {
                transform: translateY(0px);
            }
            50% {
                transform: translateY(-20px);
            }
        }

        @keyframes pulse-glow {
            0%, 100% {
                box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.7);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(102, 126, 234, 0);
            }
        }

        @keyframes spin-confetti {
            0% {
                transform: rotate(0deg) translateY(-50px);
                opacity: 1;
            }
            100% {
                transform: rotate(360deg) translateY(0);
                opacity: 0;
            }
        }

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

        .confetti {
            position: fixed;
            pointer-events: none;
            font-size: 30px;
            animation: spin-confetti 3s ease-in forwards;
        }

        button:hover {
            animation: bounce 0.6s ease-in-out;
        }

        .card:hover {
            transform: scale(1.02);
            transition: transform 0.3s ease;
        }

        .card h2 {
            animation: pulse 2s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% {
                opacity: 1;
            }
            50% {
                opacity: 0.8;
            }
        }

        .popup-content {
            animation: popupZoom 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), pulse-glow 2s ease-in-out 0.5s;
        }

        input[type="text"]:focus,
        input[type="email"]:focus,
        textarea:focus {
            animation: shake 0.3s ease-in-out;
        }

        /* Emoji fun */
        .card::before {
            content: '✨';
            position: absolute;
            top: 10px;
            right: 20px;
            font-size: 24px;
            animation: float 3s ease-in-out infinite;
        }

        .card {
            position: relative;
        }

        textarea::placeholder,
        input::placeholder {
            opacity: 0.6;
            transition: opacity 0.3s ease;
        }

        textarea:focus::placeholder,
        input:focus::placeholder {
            opacity: 0.3;
        }

        /* ============ EXTRÊMEMENT ORIGINAL ============ */

        /* Holographic animated background */
        body {
            background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
            background-size: 400% 400%;
            animation: gradientShift 15s ease infinite;
            min-height: 100vh;
        }

        @keyframes gradientShift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        /* Card 3D transformation */
        .form-container {
            perspective: 1000px;
        }

        .card {
            position: relative;
            transform-style: preserve-3d;
            transition: transform 0.6s cubic-bezier(0.23, 1, 0.320, 1);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: 
                linear-gradient(white, white),
                linear-gradient(135deg, #667eea, #764ba2, #f093fb);
            background-origin: border-box;
            background-clip: content-box, border-box;
        }

        .form-container:hover .card {
            transform: rotateX(5deg) rotateY(5deg);
        }

        /* Ultra glow effect */
        .card {
            box-shadow: 
                0 0 60px rgba(102, 126, 234, 0.6),
                0 0 100px rgba(118, 75, 162, 0.4),
                inset 0 0 60px rgba(255, 255, 255, 0.2);
        }

        .card::after {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(
                45deg,
                transparent,
                rgba(255, 255, 255, 0.1),
                transparent
            );
            transform: rotate(45deg);
            animation: shimmer 3s infinite;
            pointer-events: none;
            border-radius: 15px;
        }

        @keyframes shimmer {
            0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
            100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
        }

        /* Inputs avec gradient border */
        input[type="text"],
        input[type="email"],
        textarea {
            background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(245,245,255,0.9));
            transition: all 0.3s ease;
        }

        input[type="text"]:focus,
        input[type="email"]:focus,
        textarea:focus {
            border-color: #667eea;
            box-shadow: 
                0 0 20px rgba(102, 126, 234, 0.6),
                inset 0 0 20px rgba(102, 126, 234, 0.1);
            transform: scale(1.02);
        }

        /* Button avec liquid ripple */
        button {
            position: relative;
            overflow: hidden;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            transition: all 0.3s ease;
        }

        button::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.3);
            transform: translate(-50%, -50%);
            transition: width 0.6s, height 0.6s;
        }

        button:hover::before {
            width: 500px;
            height: 500px;
        }

        button:hover {
            transform: translateY(-5px) scale(1.05);
            box-shadow: 
                0 20px 40px rgba(102, 126, 234, 0.6),
                0 0 40px rgba(118, 75, 162, 0.4);
            letter-spacing: 4px;
        }

        /* Titre avec gradient animé */
        .card h2 {
            background: linear-gradient(45deg, #667eea, #764ba2, #f093fb, #667eea);
            background-size: 300% 300%;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: gradientText 4s ease infinite, float 3s ease-in-out infinite;
            font-size: 32px;
            font-weight: 800;
            letter-spacing: 2px;
            position: relative;
        }

        @keyframes gradientText {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        /* Sparkles autour du titre */
        .card h2::before,
        .card h2::after {
            content: '✨';
            display: inline-block;
            animation: sparkle 2s ease-in-out infinite;
            margin: 0 10px;
        }

        @keyframes sparkle {
            0%, 100% { opacity: 0; transform: scale(0); }
            50% { opacity: 1; transform: scale(1); }
        }

        /* Particules volantes */
        .floating-particle {
            position: fixed;
            pointer-events: none;
            font-size: 40px;
            animation: float-particle 6s ease-in forwards;
            z-index: 1;
        }

        @keyframes float-particle {
            0% {
                opacity: 1;
                transform: translateY(0) translateX(0) scale(1) rotate(0deg);
            }
            100% {
                opacity: 0;
                transform: translateY(-200px) translateX(100px) scale(0) rotate(360deg);
            }
        }

        /* Popup extrêmement original */
        .popup-overlay {
            background: 
                radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.3), transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(118, 75, 162, 0.3), transparent 50%),
                rgba(0, 0, 0, 0.5);
        }

        .popup-content {
            background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(245,245,255,0.95));
            backdrop-filter: blur(20px);
            border: 2px solid rgba(255,255,255,0.5);
            box-shadow: 
                0 30px 80px rgba(0, 0, 0, 0.3),
                0 0 60px rgba(102, 126, 234, 0.4),
                inset 0 0 60px rgba(255,255,255,0.3);
            animation: popupZoom 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), popupPulse 2s ease-in-out 0.5s;
        }

        @keyframes popupPulse {
            0%, 100% {
                box-shadow: 
                    0 30px 80px rgba(0, 0, 0, 0.3),
                    0 0 60px rgba(102, 126, 234, 0.4),
                    inset 0 0 60px rgba(255,255,255,0.3);
            }
            50% {
                box-shadow: 
                    0 30px 80px rgba(0, 0, 0, 0.3),
                    0 0 100px rgba(102, 126, 234, 0.8),
                    inset 0 0 80px rgba(255,255,255,0.5);
            }
        }

        /* Checkmark avec spin */
        .checkmark {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
            box-shadow: 
                0 0 40px rgba(102, 126, 234, 0.8),
                inset 0 0 40px rgba(255,255,255,0.2);
            animation: checkmarkPulse 0.6s ease-out 0.2s backwards, spinCheck 2s linear infinite;
        }

        @keyframes spinCheck {
            0% { transform: rotate(0deg) scale(1); }
            50% { transform: rotate(180deg) scale(1.1); }
            100% { transform: rotate(360deg) scale(1); }
        }

        .checkmark::after {
            font-size: 60px;
            animation: checkmarkDraw 0.4s ease-out 0.4s backwards, bounceCheck 0.6s ease-out 0.4s;
        }

        @keyframes bounceCheck {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.3); }
        }

        /* Popup titre avec texte animé */
        .popup-content h3 {
            background: linear-gradient(45deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-size: 28px;
            animation: textGlow 2s ease-in-out infinite;
        }

        @keyframes textGlow {
            0%, 100% { text-shadow: none; }
            50% { 
                text-shadow: 0 0 20px rgba(102, 126, 234, 0.5); 
            }
        }

        /* Bouton fermer extreme */
        .popup-close-btn {
            position: relative;
            border-radius: 50px;
            padding: 12px 40px;
            font-weight: 700;
            letter-spacing: 1px;
            overflow: hidden;
        }

        .popup-close-btn::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255,255,255,0.3);
            transform: translate(-50%, -50%);
            transition: width 0.5s, height 0.5s;
        }

        .popup-close-btn:hover::after {
            width: 300px;
            height: 300px;
        }