/* Reset e configurações básicas */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --error-color: #e74c3c;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
    --light-text: #7f8c8d;
    --border-color: #bdc3c7;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* Body e fundo */
.login-body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #92a3ef 0%, #a4ccf5 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.login-background {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    min-height: calc(100vh - 80px);
}

.login-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/logo.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.1;
    z-index: 1;
}

/* Container principal */
.login-container {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 420px;
}

/* Card de login */
.login-card {
    background: var(--white);
    border-radius: 15px;
    padding: 40px 30px;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Header do login */
.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header .logo {
    max-width: 120px;
    height: auto;
    margin-bottom: 20px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.login-header h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.login-header p {
    color: var(--light-text);
    font-size: 0.95rem;
}

/* Formulário */
.login-form {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--dark-text);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group label i {
    margin-right: 8px;
    color: var(--secondary-color);
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: var(--light-bg);
}

.form-group input:focus {
    outline: none;
    border-color: var(--secondary-color);
    background-color: var(--white);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group input::placeholder {
    color: #a0a0a0;
}

/* Botão */
.btn {
    width: 100%;
    padding: 14px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), #2980b9);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(52, 152, 219, 0.3);
}

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

/* Alertas */
.alert {
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background-color: rgba(39, 174, 96, 0.1);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.alert-error {
    background-color: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--error-color);
    color: var(--error-color);
}

/* Footer do login */
.login-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.login-footer small {
    color: var(--light-text);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.85rem;
}

/* Responsividade */
@media (max-width: 480px) {
    .login-container {
        max-width: 100%;
        padding: 0 15px;
    }
    
    .login-card {
        padding: 30px 20px;
    }
    
    .login-header h1 {
        font-size: 1.5rem;
    }
    
    .login-header p {
        font-size: 0.9rem;
    }
    
    .login-background::before {
        background-size: cover;
        opacity: 0.05;
    }
}

/* Animações */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card {
    animation: fadeIn 0.6s ease-out;
}

/* Estados de loading */
.btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}