:root{
    --actionneur-gradient: linear-gradient(to right, #FFCC00, #ff6b00);
    --actionneur-hover: linear-gradient(to right, #ffb300, #ff6b00);
    --shadow-secondary: 0 10px 30px rgba(23, 67, 146, 0.2);
    --saisie-focus: #174392;
    --error-color: #d32f2f;
    --success-color: #388e3c;
}

.formulaire-connexion {
    width: 100%;
    max-width: 600px;
    min-width: 300px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 25px;
    border: .5px solid rgba(24, 86, 244, 0.187);
    box-shadow: 0 5px 15px rgba(40, 97, 243, 0.24);
    overflow: hidden;
    animation: fadeInUp 1.2s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
    margin-left: auto;
    margin-right: auto;
    margin-top: none;
}

.entete-principal {
    background: var(--gradient-secondary);
    color: white;
    padding: 2rem 1.5rem;
    text-align: center;
    font-size: 1.8rem;
    font-weight: bold;
    position: relative;
    clip-path: inset(0 0 0 0 round 25px 25px 0 0);
}

.entete-principal::after {
    content: "";
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    transition: width 0.4s ease-in-out;
}

.entete-principal:hover::after {
    width: 100px;
}

.formulaire-contenu {
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.groupe-saisie {
    position: relative;
    display: flex;
    align-items: center;
}

.icone-saisie {
    position: absolute;
    left: 12px;
    top: 14px;
    color: #aaa;
    font-size: 1.1rem;
    z-index: 2;
}

.champ-saisie {
    width: 100%;
    padding: 1rem 1rem 0.5rem 2.8rem;
    border: none;
    outline: none;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.6);
    transition: all 0.3s ease;
    font-size: 1rem;
    border: 1px solid #18418c19;
    box-shadow: 0 0 10px rgba(159, 192, 255, 0.091);
}

.champ-saisie:focus {
    background: rgba(255, 255, 255, 0.95);
    border-color: var(--saisie-focus);
    box-shadow: 0 0 10px rgba(23, 67, 146, 0.3);
}

label {
    position: absolute;
    top: .6rem;
    left: 2.8rem;
    pointer-events: none;
    color: #666;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: transparent;
    z-index: 1;
}

.champ-saisie:focus + label,
.champ-saisie:not(:placeholder-shown) + label {
    top: -0.6rem;
    left: 3rem;
    font-size: 0.75rem;
    color: var(--primary-color);
    background: white;
    padding: 0 0.3rem;
    border-radius: 4px;
}

.actionneur-validation {
    background: var(--actionneur-gradient);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 0;
}

.actionneur-validation::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.3), transparent 60%);
    transform: translateY(-50%);
    opacity: 0;
    transition: all 0.4s ease;
    z-index: 1;
}

.actionneur-validation:hover::before {
    left: 150%;
    opacity: 1;
}

.actionneur-validation:hover {
    background: var(--actionneur-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(23, 67, 146, 0.3);
}

.message-boite {
    display: none;
    text-align: center;
    font-size: 75%;
    font-weight: bold;
    padding: 0.5rem;
    border-radius: 8px;
}

.erreur-message {
    background: rgba(var(--error-color-rgb), 0.1);
    color: var(--error-color);
}

.succes-message {
    background: rgba(var(--success-color-rgb), 0.1);
    color: var(--success-color);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

@supports (color: rgb(0 0 0 / 0)) {
    :root {
        --error-color-rgb: 211, 47, 47;
        --success-color-rgb: 56, 142, 60;
    }
}

/* Responsive */
@media (min-width: 600px) {
    .formulaire-connexion {
        width: 100%;
        max-width: 600px;
        min-width: 500px;
    }
}
@media (max-width: 600px) {
    .icone-saisie {
        left: 10px;
        top: 14px;
        font-size: 1rem;
    }

    .champ-saisie {
        padding-left: 2.4rem;
        font-size: 0.95rem;
    }

    label {
        left: 2.6rem;
        font-size: 0.9rem;
    }

    .actionneur-validation {
        font-size: 1rem;
    }

    .entete-principal {
        font-size: 1.5rem;
    }

    .formulaire-contenu {
        gap: 1.2rem;
        padding: 1.5rem;
    }
}