:root {
    --cor-primaria: #2563eb;
    --cor-primaria-hover: #1d4ed8;
    --cor-fundo: #0f172a;
    --cor-texto: #1e293b;
    --cor-secundaria: #64748b;
    --cor-borda: #cbd5e1;
    --cor-erro: #dc2626;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(
        135deg,
        #0f172a 0%,
        #1e3a8a 100%
    );
    color: var(--cor-texto);
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 430px;
    background: #ffffff;
    border-radius: 18px;
    padding: 40px 35px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    width: 65px;
    height: 65px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--cor-primaria);
    color: white;
    font-size: 24px;
    font-weight: bold;
    border-radius: 16px;
}

.login-header h1 {
    font-size: 25px;
    line-height: 1.3;
    margin-bottom: 12px;
}

.login-header p {
    font-size: 14px;
    color: var(--cor-secundaria);
    line-height: 1.6;
}

.form-group {
    margin-bottom: 22px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 14px 15px;
    font-size: 15px;
    border: 1px solid var(--cor-borda);
    border-radius: 9px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    border-color: var(--cor-primaria);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.btn-login {
    width: 100%;
    padding: 15px;
    background: var(--cor-primaria);
    color: white;
    border: none;
    border-radius: 9px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-login:hover {
    background: var(--cor-primaria-hover);
}

.btn-login:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.mensagem-erro {
    color: var(--cor-erro);
    font-size: 13px;
    margin-bottom: 15px;
    text-align: center;
}

.mensagem-erro:empty {
    display: none;
}

.login-footer {
    text-align: center;
    margin-top: 25px;
    font-size: 13px;
    color: var(--cor-secundaria);
}

.login-footer span {
    color: var(--cor-primaria);
    font-weight: bold;
}

@media (max-width: 480px) {
    .login-card {
        padding: 30px 22px;
    }

    .login-header h1 {
        font-size: 22px;
    }

    .login-container {
        padding: 15px;
    }
}