:root {
    --login-gradient: linear-gradient(135deg, var(--cor-primaria) 0%, var(--cor-secundaria) 100%);
    --login-shadow: 0 10px 30px rgba(23, 115, 207, 0.15);
    --input-focus: rgba(23, 115, 207, 0.1);
}

.login-container {
    min-height: 100vh;
    background: var(--login-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--texto-claro);
    border-radius: 16px;
    box-shadow: var(--login-shadow);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--borda);
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-logo {
    display: block;
    margin: 0 auto 2rem;
    max-width: 120px;
    height: auto;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.login-title {
    color: var(--cor-secundaria);
    font-size: 1.75rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.login-subtitle {
    color: var(--texto-suave);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.form-floating {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-floating > .form-control {
    height: 58px;
    padding: 1rem 0.75rem 0.25rem;
    border: 2px solid var(--borda);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: var(--fundo-pagina);
}

.form-floating > .form-control:focus {
    border-color: var(--cor-primaria);
    box-shadow: 0 0 0 0.2rem var(--input-focus);
    background-color: var(--texto-claro);
}

.form-floating > label {
    padding: 1rem 0.75rem;
    color: var(--texto-suave);
    font-weight: 500;
    transition: all 0.3s ease;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--texto-suave);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.2s ease;
    z-index: 10;
}

.password-toggle:hover {
    color: var(--cor-primaria);
    background-color: var(--input-focus);
}

.login-btn {
    background: var(--login-gradient);
    border: none;
    border-radius: 12px;
    color: var(--texto-claro);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.875rem 1.5rem;
    width: 100%;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(23, 115, 207, 0.3);
    position: relative;
    overflow: hidden;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(23, 115, 207, 0.4);
    color: var(--texto-claro);
}

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

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.login-btn:hover::before {
    left: 100%;
}

.alert-danger {
    background-color: rgba(192, 57, 43, 0.1);
    border: 1px solid rgba(192, 57, 43, 0.3);
    color: var(--erro);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.form-text {
    color: var(--texto-suave);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* Responsividade */
@media (max-width: 480px) {
    .login-container {
        padding: 15px;
    }
    
    .login-card {
        padding: 2rem 1.5rem;
        border-radius: 12px;
    }
    
    .login-title {
        font-size: 1.5rem;
    }
    
    .login-logo {
        max-width: 100px;
    }
}

/* Estados de loading */
.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.login-btn.loading {
    position: relative;
    color: transparent;
}

.login-btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid transparent;
    border-top: 2px solid var(--texto-claro);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Melhorias de acessibilidade */
.form-control:focus {
    outline: none;
}

.login-btn:focus {
    outline: 2px solid var(--cor-primaria);
    outline-offset: 2px;
}

.password-toggle:focus {
    outline: 2px solid var(--cor-primaria);
    outline-offset: 2px;
}