/* ── HEADER ── */
.header{background:#0F172A;padding:16px 20px 12px;text-align:center;position:sticky;top:0;z-index:200;box-shadow:0 4px 20px rgba(0,0,0,.25);position:relative}
.header-label{font-size:10px;font-weight:700;letter-spacing:4px;color:#64B5F6;margin-bottom:3px}
.header-title{font-size:19px;font-weight:900;color:#fff}
.header-sub{font-size:11px;color:#64748B;margin-top:3px}
.done-lock-btn{position:absolute;top:50%;right:14px;transform:translateY(-50%);background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.18);border-radius:10px;color:#94A3B8;font-size:16px;padding:5px 10px;cursor:pointer;transition:all .2s;line-height:1;font-family:inherit}
.done-lock-btn:hover{background:rgba(255,255,255,0.15);color:#fff}
.done-lock-btn.unlocked{background:rgba(234,88,12,0.3);border-color:#EA580C;color:#fff}