/* ===== DARK THEME ===== */
body.dark-theme {
    --background: #0f172a;
    --surface: #1e293b;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #475569;
}

body.dark-theme .header {
    background: var(--surface);
}

body.dark-theme .result-box {
    background: rgba(59, 130, 246, 0.1);
}

body.dark-theme .btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
}

body.dark-theme .input,
body.dark-theme .select-input {
    background: #334155;
    border-color: var(--border);
    color: var(--text);
}