:root {
    --primary: #d4af37;
    --bg: #0f0f0f;
    --card: #171717;
    --input: #111;
    --border: #2a2a2a;
    --text: #eaeaea;
    --muted: #888;
}

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

/* CENTRALIZAÇÃO REAL */
html, body {
    width: 100%;
    height: 100%;
}

body {
    background: var(--bg);
    font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
    color: var(--text);

    display: flex;
    align-items: center;
    justify-content: center;
}

/* CONTAINER */
.auth-container {
    width: 100%;
    max-width: 380px;
    padding: 20px;
}

/* CARD */
.auth-card {
    background: var(--card);
    padding: 32px;
    border-radius: 10px;
    border: 1px solid var(--border);
}

/* TÍTULO */
.auth-card h2 {
    text-align: center;
    margin-bottom: 25px;
    font-size: 1.4rem;
    color: var(--primary);
}

/* FORM */
.form-group {
    margin-bottom: 18px;
}

label {
    display: block;
    font-size: 13px;
    margin-bottom: 6px;
    color: var(--muted);
}

input {
    width: 100%;
    padding: 13px;
    background: var(--input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 14px;
}

input:focus {
    outline: none;
    border-color: var(--primary);
}

/* BOTÃO */
.btn-primary {
    width: 100%;
    padding: 13px;
    margin-top: 10px;
    border-radius: 6px;
    background: var(--primary);
    color: #000;
    font-size: 14px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background .2s ease, transform .1s ease;
}

.btn-primary:hover {
    background: #c9a633;
}

.btn-primary:active {
    transform: scale(.98);
}

/* ERRO */
.alert-error {
    background: #2a1111;
    color: #ff6b6b;
    border: 1px solid #552222;
    padding: 10px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-size: 13px;
    text-align: center;
}

/* FOOTER */
.auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    color: var(--muted);
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
}