:root {
    /* Base palette for the Book Exchange brand */
    --primary-blue: #003366;
    --lang-accent: #ffd700;
}

/* Language overrides keep the UI consistent while adding local accents */
.lang-de { --lang-accent: #c0392b; }
.lang-en { --lang-accent: #2980b9; }
.lang-fr { --lang-accent: #2c3e50; }
.lang-it { --lang-accent: #27ae60; }
.lang-es { --lang-accent: #e67e22; }
.lang-ua,
.lang-uk { --lang-accent: #f1c40f; }

.navbar {
    border-bottom: 4px solid var(--lang-accent);
}

.btn-primary,
.btn-primary:visited {
    background-color: var(--primary-blue);
    border-color: var(--lang-accent);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--lang-accent);
    border-color: var(--lang-accent);
    color: #000;
}

.section-title,
.text-accent {
    color: var(--lang-accent);
}

.badge-accent {
    background-color: var(--lang-accent);
    color: #000;
}