:root {
    --login-bg: #f0f2f5;
    --login-wrapper-bg: #ffffff;
    --login-image-bg: #f0f4f8;
    --login-text-primary: #333333;
    --login-text-secondary: #555555;
    --login-input-border: #dddddd;
    --login-input-bg: #ffffff;
    --login-button-bg: #4A90E2;
    --login-button-hover-bg: #357ABD;
    --login-shadow-color: rgba(0, 0, 0, 0.1);
    --login-error-bg: #ffebee;
    --login-error-text: #c62828;
}

body.dark-theme {
    --login-bg: #1a1a1a;
    --login-wrapper-bg: #2c2c2c;
    --login-image-bg: #242424;
    --login-text-primary: #e0e0e0;
    --login-text-secondary: #a0a0a0;
    --login-input-border: #444444;
    --login-input-bg: #333333;
    --login-button-bg: #58a6ff;
    --login-button-hover-bg: #4a90e2;
    --login-shadow-color: rgba(0, 0, 0, 0.5);
    --login-error-bg: #4d1212;
    --login-error-text: #ff9a9a;
}

/* Styles pour le corps de la page de connexion */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--login-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    transition: background-color 0.2s;
}

/* Conteneur principal à deux colonnes */
.login-wrapper {
    display: flex;
    width: 900px;
    max-width: 90%;
    height: 550px;
    background-color: var(--login-wrapper-bg);
    box-shadow: 0 10px 25px var(--login-shadow-color);
    border-radius: 12px;
    overflow: hidden;
    transition: background-color 0.2s;
    position: relative; /* Pour positionner le bouton de thème */
}

/* Panneau de l'image (gauche) */
.login-image-panel {
    flex: 1;
    background-color: var(--login-image-bg);
    transition: background-color 0.2s;
}

.login-image-panel img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Panneau du formulaire (droite) */
.login-form-panel {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.login-container {
    width: 100%;
    max-width: 350px;
    text-align: center;
}

h1 {
    color: var(--login-text-primary);
    margin-bottom: 24px;
    transition: color 0.2s;
}

.form-group {
    margin-bottom: 15px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--login-text-secondary);
    font-size: 14px;
    transition: color 0.2s;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--login-input-border);
    background-color: var(--login-input-bg);
    color: var(--login-text-primary);
    border-radius: 6px;
    box-sizing: border-box;
    transition: border-color 0.3s, background-color 0.2s, color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--login-button-bg);
}

.form-group-remember {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 15px;
    font-size: 14px;
    color: var(--login-text-secondary);
    transition: color 0.2s;
}

.form-group-remember input {
    margin-right: 8px;
}

button {
    width: 100%;
    padding: 12px;
    background-color: var(--login-button-bg);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: background-color 0.3s;
}

button:hover {
    background-color: var(--login-button-hover-bg);
}

.error-message {
    background-color: var(--login-error-bg);
    color: var(--login-error-text);
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
    text-align: center;
    font-size: 14px;
    transition: background-color 0.2s, color 0.2s;
}

/* Bouton de changement de thème */
#theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width:50px;
    background: var(--login-wrapper-bg);
    border: 1px solid var(--login-input-border);
    color: var(--login-text-secondary);
    cursor: pointer;
    border-radius: 5px;
    padding: 5px;
    font-size: 1.5em;
    line-height: 1;
    z-index: 1000;
    transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}

/* --- Media Query pour la responsivité --- */
@media (max-width: 768px) {
    .login-wrapper {
        flex-direction: column;
        width: 100%;
        height: 100%;
        max-width: 100%;
        border-radius: 0;
    }

    .login-image-panel {
        display: none;
    }

    .login-form-panel {
        justify-content: flex-start;
        padding-top: 60px;
    }
}