/* ============================================================
   Variáveis CSS para Cores, Espaçamentos e Estilos Reutilizáveis
   ============================================================ */
   :root {
    /* Paleta de Cores Moderna */
    --color-primary: #4A90E2; /* Azul Cobalto */
    --color-primary-light: #6CB4F5;
    --color-primary-dark: #357ABD;
    --color-secondary: #9B59B6; /* Roxo */
    --color-secondary-light: #B388EB;
    --color-secondary-dark: #7D3C98;
    --color-accent: #E67E22; /* Laranja */
    --color-accent-light: #F5A623;
    --color-accent-dark: #D35400;
    --color-success: #2ECC71; /* Verde Sucesso */
    --color-error: #E74C3C; /* Vermelho Erro */
    --color-warning: #F1C40F; /* Amarelo Aviso */
    --color-info: #3498DB; /* Azul Informativo */
    
    /* Cores de Fundo */
    --color-background: #F5F7FA;
    --color-background-dark: #1E272E;
    --color-card-bg: #FFFFFF;
    --color-card-bg-dark: #2C3E50;
    
    /* Cores de Texto */
    --color-text-primary: #2C3E50;
    --color-text-secondary: #7F8C8D;
    --color-text-light: #ECF0F1;
    --color-text-dark: #1E272E;
    
    /* Cores para Alertas */
    --color-alert-success-bg: #E8F8F5;
    --color-alert-success-text: #2ECC71;
    --color-alert-success-border: #2ECC71;
    --color-alert-error-bg: #FDEDEC;
    --color-alert-error-text: #E74C3C;
    --color-alert-error-border: #E74C3C;
    --color-alert-info-bg: #EBF5FB;
    --color-alert-info-text: #3498DB;
    --color-alert-info-border: #3498DB;
    --color-alert-warning-bg: #FCF3CF;
    --color-alert-warning-text: #F1C40F;
    --color-alert-warning-border: #F1C40F;
    
    /* Espaçamentos */
    --spacing-xxs: 0.125rem; /* 2px */
    --spacing-xs: 0.25rem;    /* 4px */
    --spacing-sm: 0.5rem;     /* 8px */
    --spacing-md: 1rem;       /* 16px */
    --spacing-lg: 1.5rem;     /* 24px */
    --spacing-xl: 2rem;        /* 32px */
    
    /* Bordas e Raio */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    
    /* Transições */
    --transition-speed: 0.3s;
    --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Tipografia */
    --font-family: 'Inter', sans-serif;
    --font-size-base: clamp(1rem, 2vw + 0.5rem, 1.2rem);
    --font-size-sm: clamp(0.875rem, 1.5vw + 0.5rem, 1rem);
    --font-size-lg: clamp(1.25rem, 3vw + 0.5rem, 1.5rem);
    
    /* Sombras */
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --box-shadow-hover: 0 6px 12px rgba(0, 0, 0, 0.15);
    
    /* Outros */
    --icon-size: 1.5rem;
}

/* ============================================================
   Modo Escuro
   ============================================================ */
body.dark-mode {
    --color-background: var(--color-background-dark);
    --color-card-bg: var(--color-card-bg-dark);
    --color-text-primary: var(--color-text-light);
    --color-text-secondary: #BDC3C7;
    --color-text-dark: #FFFFFF;
}

/* ============================================================
   Reset e Box-Sizing Global
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

body, html {
    margin: 0;
    padding: 0;
    overflow-x: hidden; /* Prevenir scroll horizontal */
    font-family: var(--font-family);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    transition: background-color var(--transition-speed) var(--transition-ease), color var(--transition-speed) var(--transition-ease);
    line-height: 1.6;
    scroll-behavior: smooth;
}

/* ============================================================
   Tipografia Geral
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw + 1rem, 3rem); }
h2 { font-size: clamp(2rem, 4vw + 1rem, 2.5rem); }
h3 { font-size: clamp(1.75rem, 3vw + 1rem, 2rem); }
h4 { font-size: clamp(1.5rem, 2.5vw + 1rem, 1.75rem); }
h5 { font-size: clamp(1.25rem, 2vw + 0.5rem, 1.5rem); }
h6 { font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem); }

p {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-ease);
}

a:hover, a:focus {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

a:focus {
    outline: 2px dashed var(--color-accent);
    outline-offset: 4px;
}

/* ============================================================
   Container de Login
   ============================================================ */
.container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    padding: var(--spacing-md);
}

.login-container {
    background-color: #ffffff;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: row;
    width: 900px;
    max-width: 100%;
    transition: transform var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed);
}

.login-container:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-hover);
}

/* ============================================================
   Coluna de Imagem
   ============================================================ */
.image-column {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50%;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary-light));
    padding: var(--spacing-lg);
    transition: background var(--transition-speed) var(--transition-ease);
}

.image-column img {
    max-width: 100%;
    max-height: 200px; /* Limita a altura máxima */
    width: auto; /* Ajusta a largura automaticamente para manter a proporção */
    height: auto; /* Ajusta a altura automaticamente para manter a proporção */
    transition: transform var(--transition-speed), max-height var(--transition-speed);
}

.image-column img:hover {
    transform: scale(1.05);
}

/* ============================================================
   Coluna de Formulário
   ============================================================ */
.form-column {
    width: 50%;
    padding: var(--spacing-lg);
    background-color: var(--color-background);
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: background-color var(--transition-speed) var(--transition-ease);
}

.form-column h2 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    transition: color var(--transition-speed);
}

.form-column h2:hover {
    color: var(--color-primary-dark);
}

.alert {
    border-radius: var(--border-radius);
    transition: background-color var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed);
}

.alert-danger {
    background-color: var(--color-alert-error-bg);
    color: var(--color-alert-error-text);
    border: 1px solid var(--color-alert-error-border);
}

.alert-success {
    background-color: var(--color-alert-success-bg);
    color: var(--color-alert-success-text);
    border: 1px solid var(--color-alert-success-border);
}

.alert-info {
    background-color: var(--color-alert-info-bg);
    color: var(--color-alert-info-text);
    border: 1px solid var(--color-alert-info-border);
}

.alert-warning {
    background-color: var(--color-alert-warning-bg);
    color: var(--color-alert-warning-text);
    border: 1px solid var(--color-alert-warning-border);
}

/* ============================================================
   Formulário de Login
   ============================================================ */
#login-form {
    display: flex;
    flex-direction: column;
}

.mb-3 {
    margin-bottom: var(--spacing-md) !important;
}

.form-label {
    font-weight: 500;
    color: var(--color-text-primary);
}

.form-control {
    border: 1px solid #ced4da;
    border-radius: var(--border-radius);
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    font-size: var(--font-size-base);
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 5px rgba(74, 144, 226, 0.3);
}

.input-group {
    display: flex;
    align-items: center;
}

.input-group .btn-toggle-password {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    border: 1px solid #ced4da;
    background-color: var(--color-primary);
    color: var(--color-text-light);
    cursor: pointer;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
}

.input-group .btn-toggle-password:hover {
    background-color: var(--color-primary-dark);
}

.input-group .btn-toggle-password:focus {
    outline: none;
}

#submit-btn {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border: none;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    font-weight: 600;
    color: var(--color-text-light);
    cursor: pointer;
    transition: background var(--transition-speed), transform var(--transition-speed);
    display: flex;
    align-items: center;
    justify-content: center;
}

#submit-btn:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
    transform: translateY(-2px);
}

#submit-btn:disabled {
    background: #cccccc;
    cursor: not-allowed;
}

#loading-spinner {
    margin-left: var(--spacing-sm);
}

/* ============================================================
   Responsividade
   ============================================================ */
@media (max-width: 768px) {
    .login-container {
        flex-direction: column;
        width: 100%;
        box-shadow: none;
        transform: none;
    }
    
    .image-column {
        width: 100%;
        padding: var(--spacing-md);
    }
    
    .form-column {
        width: 100%;
        padding: var(--spacing-md);
    }
    
    .form-column h2 {
        font-size: var(--font-size-lg);
    }
    
    .input-group .btn-toggle-password {
        border-top-left-radius: var(--border-radius);
        border-bottom-left-radius: var(--border-radius);
    }
    
    .image-column img {
        max-height: 150px; /* Reduz a altura da imagem em dispositivos móveis */
    }
}