:root {
    --primary-color: #075e54;
    --accent-color: #25d366;
    --bg-color: #e5ddd5;
    --card-bg: #ffffff;
    --text-color: #333333;
    --error-color: #d32f2f;
    --border-color: #cccccc;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 20px 10px;
}

.container {
    background-color: var(--card-bg);
    width: 100%;
    max-width: 600px;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.hidden {
    display: none !important;
}

/* Modal de Autenticação */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.login-box {
    background: var(--card-bg);
    padding: 30px 25px;
    border-radius: 8px;
    text-align: center;
    width: 90%;
    max-width: 360px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.login-box h2 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.login-box p {
    font-size: 0.9em;
    color: #666;
    margin-bottom: 15px;
}

.login-box input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1em;
    text-align: center;
}

.login-box button {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 1em;
    font-weight: bold;
    cursor: pointer;
}

.login-box button:hover {
    background-color: #054c44;
}

.error-msg {
    color: var(--error-color);
    font-size: 0.85em;
    margin-top: 10px;
    display: none;
}

/* Estilo do Formulário */
header h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.6em;
}

fieldset {
    border: 1px solid var(--border-color);
    padding: 15px 20px;
    margin-bottom: 20px;
    border-radius: 8px;
}

legend {
    font-weight: bold;
    padding: 0 8px;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 12px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.9em;
    font-weight: 600;
}

input, select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 0.95em;
    outline: none;
    transition: border-color 0.2s;
}

input:focus, select:focus {
    border-color: var(--primary-color);
}

.row {
    display: flex;
    gap: 12px;
}

.row .form-group {
    flex: 1;
}

/* Botão de Envio */
.btn-submit {
    width: 100%;
    background-color: var(--accent-color);
    color: #ffffff;
    border: none;
    padding: 15px;
    font-size: 1.1em;
    font-weight: bold;
    border-radius: 6px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: background-color 0.2s;
}

.btn-submit:hover {
    background-color: #1eb954;
}

@media (max-width: 480px) {
    .row {
        flex-direction: column;
        gap: 0;
    }
}