Theatrical gothic metalcore with a tragic fairytale mood inspired by The Nightmare Before Christmas. Open with creaking clockwork, cold wind, footsteps, detuned piano and a mysterious door. Add eerie bells and toy sounds before heavy guitars and drums enter. Use clean melodic vocals in verses, pre-choruses, choruses, bridge and outro. Build tense pre-choruses into powerful emotional choruses. Add brief high screams only in the breakdown after chorus two; no growls or harsh vocals elsewhere. Use original sound effects: rustling paper, rattling toys, bells, sleigh sounds and alarms. Make the breakdown crushing, then return to a fragile piano bridge and emotional final chorus. End with the opening motif, fading bells and one clock chime. Original melody, not a copy of the film score. Professional studio recording, clear vocals, balanced mix, controlled low end, no muddiness or clipping.