/* RESET */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

/* CORES */
:root {
    --bg: #f4f6f8;
    --card: #ffffff;
    --primary: #2563eb; /* azul moderno */
    --text: #111827;
    --text-muted: #6b7280;
    --border: #e5e7eb;
}

/* BODY */
body {
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* HEADER */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 20px;
    font-weight: bold;
    color: var(--primary);
}

nav a {
    color: var(--text);
    text-decoration: none;
    margin-left: 16px;
    font-size: 14px;
}

nav a:hover,
nav a.active {
    color: var(--primary);
}

/* CONTAINER */
.container {
    max-width: 600px;
    margin: 48px auto;
    padding: 0 16px;
    width: 100%;
}

/* TÍTULOS */
h1 {
    font-size: 28px;
    margin-bottom: 8px;
}

p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* CARD */
.card {
    background: var(--card);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

/* FORM */
label {
    display: block;
    font-size: 14px;
    margin-bottom: 16px;
    color: var(--text-muted);
}

input,
textarea {
    width: 100%;
    padding: 10px 12px;
    margin-top: 6px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #ffffff;
    font-size: 14px;
    color: var(--text);
    outline: none;
}

input::placeholder,
textarea::placeholder {
    color: #9ca3af;
}

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

/* BOTÃO */
.btn-primary {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: none;
    background: var(--primary);
    color: #ffffff;
    font-weight: bold;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s ease;
}

.btn-primary:hover {
    background: #1d4ed8;
}

/* STATUS */
.status {
    margin-top: 12px;
    font-size: 14px;
    text-align: center;
}

/* FOOTER */
.footer {
    margin-top: auto;
    padding: 16px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    background: var(--card);
}

/* RESPONSIVO */
@media (max-width: 480px) {
    .header {
        flex-direction: column;
        gap: 8px;
    }

    nav a {
        margin-left: 8px;
    }

    h1 {
        font-size: 24px;
    }
}