/* Variáveis CSS */
:root {
    --primary-color: #1A237E;
    --primary-dark: #161d6e;
    --primary-light: #534bae;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark));
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

/* Container Principal */
.login-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    padding: 3rem;
    width: 100%;
    max-width: 450px;
    text-align: center;
    animation: fadeInUp 0.6s ease-out;
    position: relative;
    overflow: hidden;
}

    .login-container::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    }

/* Logo */
.logo {
    max-width: 180px;
    height: auto;
    margin-bottom: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(26, 35, 126, 0.2);
}

/* Título */
h2 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 2rem;
    font-size: 1.8rem;
    position: relative;
}

    h2::after {
        content: '';
        position: absolute;
        bottom: -8px;
        left: 50%;
        transform: translateX(-50%);
        width: 60px;
        height: 3px;
        background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
        border-radius: 2px;
    }

/* Formulário */
.login-form {
    text-align: left;
}

.input-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-login {
    width: 100%;
    padding: 1rem 1.5rem;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 1rem;
    transition: all var(--transition-speed);
    background: #f8f9fa;
    font-weight: 500;
}

    .form-login:focus {
        outline: none;
        border-color: var(--primary-color);
        background: white;
        box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
        transform: translateY(-2px);
    }

    .form-login::placeholder {
        color: #6c757d;
        font-weight: 400;
    }

/* Links */
.row {
    margin: 1.5rem 0;
    display: flex;
    gap: 1rem;
}

.col {
    flex: 1;
}

.recuperar {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-speed);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border-radius: 6px;
}

    .recuperar:hover {
        color: var(--primary-dark);
        background: rgba(26, 35, 126, 0.05);
        text-decoration: none;
        transform: translateY(-1px);
    }

/* Botão Login */
.login-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
    margin-top: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(26, 35, 126, 0.3);
}

    .login-btn:hover {
        background: linear-gradient(135deg, var(--primary-dark), #0d1459);
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(26, 35, 126, 0.4);
    }

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

    .login-btn::before {
        content: '→';
        font-weight: bold;
        transition: transform var(--transition-speed);
    }

    .login-btn:hover::before {
        transform: translateX(3px);
    }

/* Mensagens */
.alert {
    padding: 1rem;
    border-radius: 12px;
    margin: 1rem 0;
    border: none;
    font-weight: 500;
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da, #f5c6cb);
    color: #721c24;
    border-left: 4px solid var(--danger-color);
}

.alert-success {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    color: #155724;
    border-left: 4px solid var(--success-color);
}

.alert-info {
    background: linear-gradient(135deg, #d1ecf1, #bee5eb);
    color: #0c5460;
    border-left: 4px solid var(--info-color);
}

#mensagemRetorno {
    min-height: 24px;
    font-weight: 500;
}

/* Animações */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

/* Loading */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsividade */
@media (max-width: 480px) {
    .login-container {
        padding: 2rem 1.5rem;
        margin: 1rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .row {
        flex-direction: column;
        gap: 0.5rem;
    }

    .logo {
        max-width: 140px;
    }
}

/* Efeitos de Foco Melhorados */
.form-login:invalid:not(:focus):not(:placeholder-shown) {
    border-color: var(--danger-color);
    background: #f8d7da;
}

.form-login:valid:not(:focus):not(:placeholder-shown) {
    border-color: var(--success-color);
    background: #d4edda;
}

/* Placeholder Animado */
.input-group {
    position: relative;
}

    .input-group label {
        position: absolute;
        left: 1rem;
        top: 50%;
        transform: translateY(-50%);
        color: #6c757d;
        transition: all var(--transition-speed);
        pointer-events: none;
        background: white;
        padding: 0 0.5rem;
    }

.form-login:focus + label,
.form-login:not(:placeholder-shown) + label {
    top: 0;
    font-size: 0.8rem;
    color: var(--primary-color);
    font-weight: 600;
}

/* Ícones dos inputs */
.input-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #6c757d;
    z-index: 2;
}