/* --- Variáveis de Estilo e Padrões Globais --- */
:root {
    --gradient-start: #1f1f1f;
    --gradient-end: #365a6d;
    --background-body: #F0F2F5;
    --text-dark: #343a40;
    --text-light: #ffffff;
    --accent-color: #0d6efd;
    --accent-color-darker: #0a58ca;
    --danger-color: #dc3545;
    --danger-bg: #f8d7da;
    --border-radius-card: 1.25rem; /* 20px */
    --border-radius-input: 0.75rem; /* 12px */
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: 'Nunito', sans-serif;
    margin: 0;
    background-color: var(--background-body);
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Cabeçalho e Rodapé --- */
.login-header, .login-footer {
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    color: var(--text-light);
    text-align: center;
    padding: 1rem 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.login-header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.login-footer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: auto; /* Empurra para o final */
}
.logo-footer {
    max-width: 150px;
    filter: drop-shadow(2px 2px 2px rgba(0, 0, 0, 0.5));
}
.divider {
    width: 1px;
    height: 40px;
    background-color: #cfcfcf;
    opacity: 0.5;
}
.login-footer p {
    margin: 0;
    font-weight: 600;
}


/* --- Container Principal --- */
.login-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

/* --- Card de Login (Estilo Soft UI) --- */
.login-card {
    position: relative; /* Para o posicionamento do loader */
    width: 100%;
    max-width: 420px;
    background-color: var(--background-body);
    border-radius: var(--border-radius-card);
    box-shadow: 8px 8px 16px #d1d9e6, -8px -8px 16px #ffffff;
    overflow: hidden; /* Garante que o loader não vaze */
    transition: filter 0.3s ease;
}

.login-card-content {
    padding: 2.5rem 2rem;
}

/* --- Formulário e Título --- */
.form-title {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 0 2rem 0;
    color: var(--text-dark);
}

/* --- Grupos de Input (Soft UI Inset) --- */
.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #6c757d;
}

.input-group input {
    width: 100%;
    padding: 0.9rem 1rem;
    border: none;
    border-radius: var(--border-radius-input);
    background-color: var(--background-body);
    box-shadow: inset 3px 3px 6px #d1d9e6, inset -3px -3px 6px #ffffff;
    font-size: 1rem;
    font-family: 'Nunito', sans-serif;
    color: var(--text-dark);
    transition: box-shadow 0.2s ease;
}

.input-group input:focus {
    outline: none;
    box-shadow: inset 3px 3px 6px #d1d9e6, inset -3px -3px 6px #ffffff, 0 0 0 2px var(--accent-color);
}

/* --- Botão de Login (Soft UI Extruded) --- */
.submit-btn {
    width: 100%;
    padding: 0.9rem 1rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-light);
    background: linear-gradient(145deg, var(--accent-color), var(--accent-color-darker));
    border: none;
    border-radius: var(--border-radius-input);
    cursor: pointer;
    box-shadow: 4px 4px 8px #d1d9e6, -4px -4px 8px #ffffff;
    transition: all 0.2s ease-in-out;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 6px 6px 12px #d1d9e6, -6px -6px 12px #ffffff;
}

.submit-btn:active {
    transform: translateY(1px);
    box-shadow: inset 3px 3px 6px #0b55c2, inset -3px -3px 6px #0f75ff;
}

.submit-btn:disabled {
    background: #6c757d;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

/* --- Mensagens de Alerta --- */
.messages-container {
    margin-bottom: 1.5rem;
}
.alert {
    padding: 0.8rem 1rem;
    border-radius: var(--border-radius-input);
    text-align: center;
    font-weight: 600;
}
.alert-danger {
    color: var(--danger-color);
    background-color: var(--danger-bg);
}

/* --- Animação de Loader --- */
.loader-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(240, 242, 245, 0.8);
    backdrop-filter: blur(4px);
    display: none; /* Oculto por padrão */
    align-items: center;
    justify-content: center;
    z-index: 10;
}
.login-card.loading {
    filter: blur(2px);
}
.loader-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- Responsividade --- */
@media (max-width: 480px) {
    .login-header h1 {
        font-size: 1rem;
    }
    .login-card-content {
        padding: 2rem 1.5rem;
    }
    .form-title {
        font-size: 1.5rem;
    }
    .login-footer {
        flex-direction: column;
    }
    .divider {
        display: none;
    }
}