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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #0a0e27;
            position: relative;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            background: 
                linear-gradient(90deg, rgba(0, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(rgba(0, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 50px 50px;
            animation: deplacementGrille 20s linear infinite;
        }

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

        .formes-arriere-plan {
            position: absolute;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: 1;
        }

        .forme {
            position: absolute;
        }

        .forme:nth-child(1) {
            width: 2px;
            height: 100%;
            background: linear-gradient(180deg, transparent, #00ffff, transparent);
            left: 15%;
            animation: ligneScan 4s infinite;
            opacity: 0.3;
        }

        .forme:nth-child(2) {
            width: 2px;
            height: 100%;
            background: linear-gradient(180deg, transparent, #00ff88, transparent);
            right: 25%;
            animation: ligneScan 6s infinite;
            animation-delay: 1s;
            opacity: 0.3;
        }

        .forme:nth-child(3) {
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, #ff00ff, transparent);
            top: 30%;
            animation: ligneScanHorizontale 5s infinite;
            opacity: 0.2;
        }

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

        @keyframes ligneScanHorizontale {
            0%, 100% { transform: translateX(-100%); }
            50% { transform: translateX(100%); }
        }

        .pluie-code {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            overflow: hidden;
        }

        .colonne-code {
            position: absolute;
            top: -100%;
            font-family: 'Courier New', monospace;
            font-size: 14px;
            color: #00ffff;
            opacity: 0.15;
            animation: chute linear infinite;
            white-space: nowrap;
        }

        @keyframes chute {
            to { top: 100%; }
        }

        .conteneur {
            position: relative;
            z-index: 10;
            width: 90%;
            max-width: 450px;
            padding: 20px;
        }

        .carte {
            background: rgba(15, 20, 40, 0.85);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            padding: 45px 40px;
            box-shadow: 
                0 0 80px rgba(0, 255, 255, 0.15),
                0 25px 50px rgba(0, 0, 0, 0.5),
                inset 0 1px 0 rgba(0, 255, 255, 0.1);
            border: 1px solid rgba(0, 255, 255, 0.1);
            transform: translateY(0);
            transition: all 0.3s ease;
        }

        .carte:hover {
            box-shadow: 
                0 0 100px rgba(0, 255, 255, 0.25),
                0 30px 60px rgba(0, 0, 0, 0.6),
                inset 0 1px 0 rgba(0, 255, 255, 0.2);
            transform: translateY(-5px);
            border-color: rgba(0, 255, 255, 0.2);
        }

        .en-tete {
            text-align: center;
            margin-bottom: 35px;
        }

        .logo {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, #00ffff 0%, #00ff88 100%);
            border-radius: 16px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            color: #0a0e27;
            font-weight: bold;
            box-shadow: 0 0 40px rgba(0, 255, 255, 0.6);
            position: relative;
            overflow: hidden;
        }

        .logo::before {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, transparent, rgba(255,255,255,0.3), transparent);
            transform: translateX(-100%);
            animation: brillance 3s infinite;
        }

        @keyframes brillance {
            to { transform: translateX(100%); }
        }

        .logo::after {
            content: '</>';
            font-family: monospace;
        }

        h2 {
            color: #ffffff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 8px;
            text-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
        }

        .sous-titre {
            color: #8b9dc3;
            font-size: 14px;
            margin-bottom: 10px;
        }

        .badge-connexion {
            display: inline-block;
            background: rgba(0, 255, 255, 0.1);
            color: #00ffff;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            border: 1px solid rgba(0, 255, 255, 0.3);
            margin-bottom: 10px;
        }

        .groupe-formulaire {
            margin-bottom: 22px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            color: #a0b4d5;
            font-weight: 600;
            font-size: 14px;
        }

        input {
            width: 100%;
            padding: 14px 16px;
            border: 2px solid rgba(0, 255, 255, 0.2);
            border-radius: 12px;
            font-size: 15px;
            transition: all 0.3s ease;
            background: rgba(20, 30, 50, 0.5);
            color: #ffffff;
        }

        input:focus {
            outline: none;
            border-color: #00ffff;
            box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
            background: rgba(20, 30, 50, 0.8);
        }

        input::placeholder {
            color: #5a6b8c;
        }

        .message-erreur {
            color: #ff4757;
            font-size: 12px;
            margin-top: 5px;
            display: none;
            text-shadow: 0 0 5px rgba(255, 71, 87, 0.3);
        }

        .options-connexion {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
        }

        .souvenir {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #a0b4d5;
            font-size: 13px;
            cursor: pointer;
        }

        .souvenir input[type="checkbox"] {
            width: auto;
            cursor: pointer;
            accent-color: #00ffff;
        }

        .mot-de-passe-oublie {
            color: #00ffff;
            text-decoration: none;
            font-size: 13px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .mot-de-passe-oublie:hover {
            color: #00ff88;
            text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
        }

        .btn-connexion {
            width: 100%;
            padding: 15px;
            background: linear-gradient(135deg, #00ffff 0%, #00ff88 100%);
            color: #0a0e27;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 0 30px rgba(0, 255, 255, 0.5);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .btn-connexion:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px rgba(0, 255, 255, 0.8);
        }

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

        .separateur {
            display: flex;
            align-items: center;
            text-align: center;
            margin: 30px 0;
        }

        .separateur::before,
        .separateur::after {
            content: '';
            flex: 1;
            border-bottom: 1px solid rgba(0, 255, 255, 0.2);
        }

        .separateur span {
            padding: 0 15px;
            color: #8b9dc3;
            font-size: 13px;
        }

        .lien-pied {
            text-align: center;
            margin-top: 25px;
            color: #8b9dc3;
            font-size: 14px;
        }

        .lien-pied a {
            color: #00ffff;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .lien-pied a:hover {
            color: #00ff88;
            text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
        }

        .info-securite {
            background: rgba(0, 255, 136, 0.05);
            border-left: 3px solid #00ff88;
            padding: 12px 15px;
            margin-top: 20px;
            border-radius: 8px;
            font-size: 13px;
            color: #a0b4d5;
        }

        .info-securite::before {
           
            margin-right: 5px;
        }

        @media (max-width: 600px) {
            .carte {
                padding: 30px 25px;
            }

            h2 {
                font-size: 24px;
            }

            .options-connexion {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
        }