.auth-page-layout {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
    width: 100%;
    background: transparent;
}

.auth-form.auth-form-vertical {
    flex-direction: column;
    align-items: stretch;
}

.auth-form-group {
    margin-bottom: 18px;
}

.auth-form-group.auth-form-group-spacious {
    margin-bottom: 24px;
}

.auth-form-label {
    display: block;
    margin-bottom: 6px;
}

.auth-form-control {
    width: 100%;
    padding: 8px;
    border-radius: 4px;
    border: 1.5px solid #00a0ff;
    box-sizing: border-box;
}

.auth-submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 0;
    border-radius: 6px;
    font-size: 1.1em;
    line-height: 1;
    text-align: center;
    background: linear-gradient(135deg, #001e3c 60%, #003366 100%);
    color: #00f0ff;
    border: 2px solid #00a0ff;
    margin-bottom: 0;
}

.auth-error-box {
    color: #d32f2f;
    background: #fff0f0;
    border: 1.5px solid #d32f2f;
    border-radius: 6px;
    padding: 10px 16px;
    margin-bottom: 18px;
    max-width: 400px;
    width: 100%;
    text-align: center;
    box-sizing: border-box;
}

.register-hint-box {
    margin-top: 0;
}

.register-hint-box .hint-title,
.register-hint-box .notice-title {
    color: #00f0ff;
    font-weight: 700;
    margin-bottom: 8px;
    text-align: center;
}

.register-hint-box .hint-puzzle {
    text-align: center;
    letter-spacing: 0.3em;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.register-hint-box .hint-note,
.register-hint-box .notice-ja,
.register-hint-box .notice-en {
    margin-bottom: 8px;
    line-height: 1.6;
}