diff --git a/containers/backupchecks/src/backend/app/cove_importer.py b/containers/backupchecks/src/backend/app/cove_importer.py
index ccc3107..8b339e7 100644
--- a/containers/backupchecks/src/backend/app/cove_importer.py
+++ b/containers/backupchecks/src/backend/app/cove_importer.py
@@ -12,6 +12,7 @@ Flow (mirrors the mail Inbox flow):
 from __future__ import annotations
 
 import logging
+import re
 from datetime import datetime, timezone
 from typing import Any
 
@@ -237,17 +238,58 @@ def _status_label(code: Any) -> str:
 
 def _ts_to_dt(value: Any) -> datetime | None:
     """Convert a Unix timestamp (int or str) to a naive UTC datetime."""
-    if value is None:
+    ts = _extract_unix_ts(value)
+    if ts is None:
         return None
     try:
-        ts = int(value)
-        if ts <= 0:
-            return None
         return datetime.fromtimestamp(ts, tz=timezone.utc).replace(tzinfo=None)
     except (ValueError, TypeError, OSError):
         return None
 
 
+def _extract_unix_ts(value: Any) -> int | None:
+    """Extract Unix epoch seconds from Cove timestamp variants.
+
+    Supports:
+    - plain epoch seconds ("1735689600")
+    - epoch milliseconds ("1735689600000")
+    - .NET JSON date style ("/Date(1735689600000)/")
+    """
+    if value is None:
+        return None
+
+    # Plain int/float values
+    if isinstance(value, (int, float)):
+        ts = int(value)
+    else:
+        s = str(value).strip()
+        if not s:
+            return None
+
+        # Handle /Date(1735689600000)/ (optionally with timezone suffix)
+        m = re.search(r"/Date\(([-]?\d+)(?:[+-]\d{4})?\)/", s)
+        if m:
+            s = m.group(1)
+
+        try:
+            ts = int(s)
+        except (ValueError, TypeError):
+            return None
+
+    if ts <= 0:
+        return None
+
+    # Convert ms/us/ns to seconds when needed
+    if ts > 10_000_000_000_000_000:  # ns
+        ts = ts // 1_000_000_000
+    elif ts > 10_000_000_000_000:  # us
+        ts = ts // 1_000_000
+    elif ts > 10_000_000_000:  # ms
+        ts = ts // 1_000
+
+    return ts if ts > 0 else None
+
+
 def _fmt_utc(dt: datetime | None) -> str:
     """Format a naive UTC datetime to readable text for run object messages."""
     if not dt:
@@ -255,7 +297,7 @@ def _fmt_utc(dt: datetime | None) -> str:
     return dt.strftime("%Y-%m-%d %H:%M UTC")
 
 
-def run_cove_import(settings) -> tuple[int, int, int, int]:
+def run_cove_import(settings, include_reasons: bool = False):
     """Fetch Cove account statistics and update the staging table + JobRuns.
 
     For every account:
@@ -266,7 +308,9 @@ def run_cove_import(settings) -> tuple[int, int, int, int]:
         settings: SystemSettings ORM object with cove_* fields.
 
     Returns:
-        Tuple of (total_accounts, created_runs, skipped_runs, error_count).
+        By default: tuple(total_accounts, created_runs, skipped_runs, error_count).
+        When include_reasons=True:
+            tuple(total_accounts, created_runs, skipped_runs, error_count, reason_counts).
 
     Raises:
         CoveImportError if the API login fails.
@@ -292,6 +336,7 @@ def run_cove_import(settings) -> tuple[int, int, int, int]:
     created = 0
     skipped = 0
     errors = 0
+    reason_counts: dict[str, int] = {}
 
     page_size = 250
     start = 0
@@ -310,13 +355,15 @@ def run_cove_import(settings) -> tuple[int, int, int, int]:
         for account in accounts:
             total += 1
             try:
-                run_created = _process_account(account)
-                if run_created:
+                reason = _process_account(account)
+                if reason == "created":
                     created += 1
                 else:
                     skipped += 1
+                    reason_counts[reason] = reason_counts.get(reason, 0) + 1
             except Exception as exc:
                 errors += 1
+                reason_counts["error"] = reason_counts.get("error", 0) + 1
                 logger.warning("Cove import: error processing account: %s", exc)
                 try:
                     db.session.rollback()
@@ -334,13 +381,21 @@ def run_cove_import(settings) -> tuple[int, int, int, int]:
     except Exception:
         db.session.rollback()
 
+    if include_reasons:
+        return total, created, skipped, errors, reason_counts
     return total, created, skipped, errors
 
 
-def _process_account(account: dict) -> bool:
+def _process_account(account: dict) -> str:
     """Upsert a Cove account into the staging table and create a JobRun if linked.
 
-    Returns True if a new JobRun was created, False otherwise.
+    Returns a result code:
+      - "created"
+      - "skip_invalid_account_id"
+      - "skip_unlinked"
+      - "skip_no_timestamp"
+      - "skip_missing_job"
+      - "skip_duplicate"
     """
     from .models import CoveAccount, Job, JobRun
 
@@ -349,11 +404,11 @@ def _process_account(account: dict) -> bool:
     # AccountId is a top-level field
     account_id = account.get("AccountId") or account.get("AccountID")
     if not account_id:
-        return False
+        return "skip_invalid_account_id"
     try:
         account_id = int(account_id)
     except (ValueError, TypeError):
-        return False
+        return "skip_invalid_account_id"
 
     # Extract metadata from flat settings
     account_name = (flat.get("I1") or "").strip() or None
@@ -409,23 +464,23 @@ def _process_account(account: dict) -> bool:
     # If still not linked to a job, nothing more to do (shows up in Cove Accounts page)
     if not cove_acc.job_id:
         db.session.commit()
-        return False
+        return "skip_unlinked"
 
     # Account is linked: create a JobRun if the last session is new
     if not last_run_at:
         db.session.commit()
-        return False
+        return "skip_no_timestamp"
 
-    try:
-        run_ts = int(last_run_ts_raw or 0)
-    except (TypeError, ValueError):
-        run_ts = 0
+    run_ts = _extract_unix_ts(last_run_ts_raw)
+    if not run_ts:
+        # Fallback to parsed datetime to keep dedup stable for non-numeric raw formats.
+        run_ts = int(last_run_at.replace(tzinfo=timezone.utc).timestamp())
 
     # Fetch the linked job
     job = Job.query.get(cove_acc.job_id)
     if not job:
         db.session.commit()
-        return False
+        return "skip_missing_job"
 
     external_id = f"cove-{account_id}-{run_ts}"
 
@@ -435,7 +490,7 @@ def _process_account(account: dict) -> bool:
     existing = JobRun.query.filter_by(job_id=job.id, external_id=external_id).first()
     if existing:
         db.session.commit()
-        return False
+        return "skip_duplicate"
 
     status = _map_status(last_status_code)
     run_remark = (
@@ -465,7 +520,7 @@ def _process_account(account: dict) -> bool:
         _persist_datasource_objects(flat, job.customer_id, job.id, run.id, last_run_at)
 
     db.session.commit()
-    return True
+    return "created"
 
 
 def _persist_datasource_objects(
diff --git a/containers/backupchecks/src/backend/app/main/routes_run_checks.py b/containers/backupchecks/src/backend/app/main/routes_run_checks.py
index 1e45f4f..e94b4a9 100644
--- a/containers/backupchecks/src/backend/app/main/routes_run_checks.py
+++ b/containers/backupchecks/src/backend/app/main/routes_run_checks.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import calendar
+import threading
 
 from datetime import date, datetime, time, timedelta, timezone
 
@@ -43,6 +44,59 @@ from ..ticketing_utils import link_open_internal_tickets_to_run
 
 AUTOTASK_TERMINAL_STATUS_IDS = {5}
 RUN_CHECKS_SORT_MODES = {"customer", "status"}
+
+# ---------------------------------------------------------------------------
+# Background task helpers
+# ---------------------------------------------------------------------------
+
+# Throttle: track when we last ran missed-run generation per job.
+# Key: job_id (int), Value: datetime of last run (UTC)
+_missed_run_last_ran: dict[int, datetime] = {}
+_missed_run_lock = threading.Lock()
+_MISSED_RUN_THROTTLE = timedelta(minutes=10)
+
+# Guard: only one background sweep at a time
+_bg_sweep_lock = threading.Lock()
+
+
+def _run_background_sweep(app, job_ids_and_dates: list[tuple[int, date, date]], run_ids_for_at: list[int]) -> None:
+    """Heavy operations executed in a daemon thread so the page loads immediately.
+
+    - Missed-run generation for eligible jobs (throttled per job).
+    - Autotask ticket state polling.
+    """
+    if not _bg_sweep_lock.acquire(blocking=False):
+        # A sweep is already running; skip to avoid pile-up.
+        return
+
+    try:
+        with app.app_context():
+            # 1. Missed-run generation
+            try:
+                for job_id, start_date, end_date in job_ids_and_dates:
+                    try:
+                        job = Job.query.get(job_id)
+                        if job is None:
+                            continue
+                        _ensure_missed_runs_for_job(job, start_date, end_date)
+                        with _missed_run_lock:
+                            _missed_run_last_ran[job_id] = datetime.utcnow()
+                    except Exception:
+                        try:
+                            db.session.rollback()
+                        except Exception:
+                            pass
+            except Exception:
+                pass
+
+            # 2. Autotask ticket state polling
+            try:
+                if run_ids_for_at:
+                    _poll_autotask_ticket_states_for_runs(run_ids=run_ids_for_at)
+            except Exception:
+                pass
+    finally:
+        _bg_sweep_lock.release()
 RUN_CHECKS_STATUS_FILTER_VALUES = ("critical", "missed", "warning", "success_override", "success")
 
 
@@ -942,9 +996,16 @@ def run_checks_page():
     if get_active_role() == "admin":
         include_reviewed = request.args.get("include_reviewed", "0") in ("1", "true", "yes", "on")
 
-    # Generate missed runs since the last review per job so they show up in Run Checks.
-    # This is intentionally best-effort; any errors should not block page load.
+    # ---------------------------------------------------------------------------
+    # Background sweep: missed-run generation + Autotask ticket polling.
+    # Both operations are dispatched to a daemon thread so this page loads
+    # immediately. Results will be visible on the *next* page load.
+    # Missed-run generation is throttled per job (max once per 10 minutes).
+    # ---------------------------------------------------------------------------
     try:
+        from flask import current_app
+        app = current_app._get_current_object()  # noqa: SLF001 — safe proxy unwrap
+
         settings_start = _get_default_missed_start_date()
 
         last_reviewed_rows = (
@@ -954,36 +1015,59 @@ def run_checks_page():
         )
         last_reviewed_map = {int(jid): (dt if dt else None) for jid, dt in last_reviewed_rows}
 
-        jobs = (
+        jobs_all = (
             Job.query.outerjoin(Customer)
             .filter(Job.archived.is_(False))
             .filter(db.or_(Customer.id.is_(None), Customer.active.is_(True)))
             .all()
         )
         today_local = _to_amsterdam_date(datetime.utcnow()) or datetime.utcnow().date()
+        now_utc = datetime.utcnow()
 
-        for job in jobs:
-            if _is_hidden_3cx_non_backup(getattr(job, "backup_software", None), getattr(job, "backup_type", None)):
-                continue
-            last_rev = last_reviewed_map.get(int(job.id))
-            if last_rev:
-                start_date = _to_amsterdam_date(last_rev) or settings_start
-            else:
-                start_date = settings_start
-            if start_date and start_date > today_local:
-                continue
-            _ensure_missed_runs_for_job(job, start_date, today_local)
-    except Exception:
-        # Don't block the page if missed-run generation fails.
-        pass
+        # Build list of jobs that need a missed-run sweep (throttled).
+        jobs_to_sweep: list[tuple[int, date, date]] = []
+        with _missed_run_lock:
+            for job in jobs_all:
+                if _is_hidden_3cx_non_backup(
+                    getattr(job, "backup_software", None), getattr(job, "backup_type", None)
+                ):
+                    continue
+                last_ran = _missed_run_last_ran.get(int(job.id))
+                if last_ran and (now_utc - last_ran) < _MISSED_RUN_THROTTLE:
+                    continue  # ran recently enough
+                last_rev = last_reviewed_map.get(int(job.id))
+                if last_rev:
+                    start_date = _to_amsterdam_date(last_rev) or settings_start
+                else:
+                    start_date = settings_start
+                if start_date and start_date > today_local:
+                    continue
+                jobs_to_sweep.append((int(job.id), start_date, today_local))
+
+        # Collect Autotask run ids for Phase 2 polling.
+        at_run_ids: list[int] = []
+        try:
+            at_run_ids = [
+                int(x)
+                for (x,) in JobRun.query
+                .filter(JobRun.reviewed_at.is_(None), JobRun.autotask_ticket_id.isnot(None))
+                .with_entities(JobRun.id)
+                .limit(800)
+                .all()
+            ]
+        except Exception:
+            at_run_ids = []
+
+        if jobs_to_sweep or at_run_ids:
+            t = threading.Thread(
+                target=_run_background_sweep,
+                args=(app, jobs_to_sweep, at_run_ids),
+                daemon=True,
+            )
+            t.start()
 
-    # Phase 2 (read-only PSA driven): sync internal ticket resolved state based on PSA ticket status.
-    # Best-effort: never blocks page load.
-    try:
-        run_q = JobRun.query.filter(JobRun.reviewed_at.is_(None), JobRun.autotask_ticket_id.isnot(None))
-        run_ids = [int(x) for (x,) in run_q.with_entities(JobRun.id).limit(800).all()]
-        _poll_autotask_ticket_states_for_runs(run_ids=run_ids)
     except Exception:
+        # Never block the page load.
         pass
 
     # Aggregated per-job rows
diff --git a/containers/backupchecks/src/backend/app/main/routes_settings.py b/containers/backupchecks/src/backend/app/main/routes_settings.py
index 9d1bef5..1ec3dd8 100644
--- a/containers/backupchecks/src/backend/app/main/routes_settings.py
+++ b/containers/backupchecks/src/backend/app/main/routes_settings.py
@@ -1368,13 +1368,20 @@ def settings_cove_run_now():
         return redirect(url_for("main.settings", section="integrations"))
 
     try:
-        total, created, skipped, errors = run_cove_import(settings)
+        total, created, skipped, errors, reasons = run_cove_import(settings, include_reasons=True)
+        reason_text = ", ".join(f"{k}={v}" for k, v in sorted(reasons.items())) or "none"
         _log_admin_event(
             "cove_import_manual",
-            f"Manual Cove import finished. accounts={total}, created={created}, skipped={skipped}, errors={errors}",
+            (
+                "Manual Cove import finished. "
+                f"accounts={total}, created={created}, skipped={skipped}, errors={errors}, reasons={reason_text}"
+            ),
         )
         flash(
-            f"Cove import finished. Accounts: {total}, new runs: {created}, skipped: {skipped}, errors: {errors}.",
+            (
+                f"Cove import finished. Accounts: {total}, new runs: {created}, "
+                f"skipped: {skipped}, errors: {errors}. Skip reasons: {reason_text}."
+            ),
             "success" if errors == 0 else "warning",
         )
     except CoveImportError as exc:
diff --git a/containers/backupchecks/src/static/css/layout.css b/containers/backupchecks/src/static/css/layout.css
index e1afe54..71acf72 100644
--- a/containers/backupchecks/src/static/css/layout.css
+++ b/containers/backupchecks/src/static/css/layout.css
@@ -1,25 +1,434 @@
-/* Global layout constraints
-   - Consistent content width across all pages
-   - Optimized for 1080p while preventing further widening on higher resolutions
-*/
+/* ============================================================
+   Backupchecks — Layout v2
+   Sidebar-first, IBM Plex, token-based design system
+   ============================================================ */
 
-/* Default pages: use more horizontal space on 1920x1080 */
-main.content-container {
-  width: min(96vw, 1840px);
-  max-width: 1840px;
+/* ---- Design tokens ---- */
+:root {
+  --bc-sidebar-w: 220px;
+  --bc-sidebar-bg: #0f1117;
+  --bc-sidebar-border: rgba(255,255,255,0.07);
+  --bc-sidebar-text: rgba(255,255,255,0.65);
+  --bc-sidebar-text-hover: rgba(255,255,255,0.95);
+  --bc-sidebar-active-bg: rgba(255,255,255,0.08);
+  --bc-sidebar-active-text: #fff;
+  --bc-sidebar-label-color: rgba(255,255,255,0.3);
+  --bc-logo-color: #fff;
+  --bc-accent: #3b82f6;
+  --bc-accent-dim: rgba(59,130,246,0.15);
+  --bc-main-bg: #f5f6f8;
+  --bc-main-bg-dark: #181c24;
+  --bc-content-max: 1720px;
+  --bc-radius: 8px;
+  --bc-font: 'IBM Plex Sans', system-ui, sans-serif;
+  --bc-mono: 'IBM Plex Mono', 'Cascadia Code', monospace;
+  --bc-transition: 150ms ease;
 }
 
-/* Dashboard: keep the original width */
-main.dashboard-container {
-  width: min(90vw, 1728px);
-  max-width: 1728px;
+/* ---- Global resets ---- */
+*, *::before, *::after { box-sizing: border-box; }
+
+body.bc-body {
+  font-family: var(--bc-font);
+  font-size: 14px;
+  line-height: 1.55;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  min-height: 100vh;
 }
 
-/* Prevent long detail values (e.g., email addresses) from overlapping other fields */
-.dl-compact dt {
+/* ============================================================
+   SIDEBAR
+   ============================================================ */
+.bc-sidebar {
+  position: fixed;
+  top: 0;
+  left: 0;
+  bottom: 0;
+  width: var(--bc-sidebar-w);
+  background: var(--bc-sidebar-bg);
+  border-right: 1px solid var(--bc-sidebar-border);
+  display: flex;
+  flex-direction: column;
+  z-index: 200;
+  overflow: hidden;
+}
+
+/* ---- Header / Logo ---- */
+.bc-sidebar-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0 14px;
+  height: 52px;
+  flex-shrink: 0;
+  border-bottom: 1px solid var(--bc-sidebar-border);
+}
+
+.bc-logo {
+  display: flex;
+  align-items: center;
+  gap: 9px;
+  text-decoration: none;
+  color: var(--bc-logo-color);
+}
+
+.bc-logo-icon { display: flex; align-items: center; color: var(--bc-accent); flex-shrink: 0; }
+
+.bc-logo-text {
+  font-size: 13.5px;
+  font-weight: 600;
+  letter-spacing: -.01em;
   white-space: nowrap;
 }
 
+.bc-sidebar-toggle {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: none;
+  border: none;
+  color: var(--bc-sidebar-text);
+  cursor: pointer;
+  padding: 4px;
+  border-radius: 4px;
+}
+
+.bc-sidebar-toggle:hover { color: var(--bc-sidebar-text-hover); }
+
+/* ---- Search ---- */
+.bc-sidebar-search {
+  padding: 10px 12px;
+  border-bottom: 1px solid var(--bc-sidebar-border);
+  flex-shrink: 0;
+}
+
+.bc-search-form {
+  position: relative;
+  display: flex;
+  align-items: center;
+}
+
+.bc-search-icon {
+  position: absolute;
+  left: 9px;
+  color: var(--bc-sidebar-label-color);
+  pointer-events: none;
+  flex-shrink: 0;
+}
+
+.bc-search-input {
+  width: 100%;
+  background: rgba(255,255,255,0.06);
+  border: 1px solid rgba(255,255,255,0.1);
+  border-radius: 6px;
+  color: rgba(255,255,255,0.85);
+  font-size: 12.5px;
+  font-family: var(--bc-font);
+  padding: 5px 9px 5px 29px;
+  outline: none;
+  transition: border-color var(--bc-transition);
+}
+
+.bc-search-input::placeholder { color: var(--bc-sidebar-label-color); }
+.bc-search-input:focus { border-color: rgba(59,130,246,0.5); background: rgba(255,255,255,0.08); }
+
+/* ---- Nav ---- */
+.bc-nav-section {
+  flex: 1;
+  overflow-y: auto;
+  overflow-x: hidden;
+  padding: 8px 0;
+  scrollbar-width: thin;
+  scrollbar-color: rgba(255,255,255,0.1) transparent;
+}
+
+.bc-nav-section::-webkit-scrollbar { width: 4px; }
+.bc-nav-section::-webkit-scrollbar-track { background: transparent; }
+.bc-nav-section::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }
+
+.bc-nav-item {
+  display: flex;
+  align-items: center;
+  gap: 9px;
+  padding: 6px 12px;
+  margin: 1px 8px;
+  border-radius: 6px;
+  text-decoration: none;
+  color: var(--bc-sidebar-text);
+  font-size: 13px;
+  font-weight: 500;
+  transition: background var(--bc-transition), color var(--bc-transition);
+  white-space: nowrap;
+}
+
+.bc-nav-item:hover {
+  background: rgba(255,255,255,0.06);
+  color: var(--bc-sidebar-text-hover);
+}
+
+.bc-nav-item.is-active {
+  background: var(--bc-sidebar-active-bg);
+  color: var(--bc-sidebar-active-text);
+}
+
+.bc-nav-icon { display: flex; align-items: center; flex-shrink: 0; }
+.bc-nav-label-text { flex: 1; overflow: hidden; text-overflow: ellipsis; }
+
+.bc-nav-badge {
+  background: var(--bc-accent);
+  color: #fff;
+  font-size: 10px;
+  font-weight: 600;
+  padding: 1px 6px;
+  border-radius: 99px;
+  min-width: 18px;
+  text-align: center;
+  flex-shrink: 0;
+}
+
+.bc-nav-divider {
+  height: 1px;
+  background: var(--bc-sidebar-border);
+  margin: 6px 12px;
+}
+
+.bc-nav-label {
+  font-size: 10.5px;
+  font-weight: 600;
+  letter-spacing: .08em;
+  text-transform: uppercase;
+  color: var(--bc-sidebar-label-color);
+  padding: 4px 20px 2px;
+}
+
+/* ---- Footer ---- */
+.bc-sidebar-footer {
+  border-top: 1px solid var(--bc-sidebar-border);
+  padding: 10px 12px;
+  flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.bc-user-block {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+}
+
+.bc-user-name {
+  font-size: 12.5px;
+  font-weight: 500;
+  color: rgba(255,255,255,0.75);
+  text-decoration: none;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.bc-user-name:hover { color: #fff; }
+
+.bc-user-role {
+  font-size: 10.5px;
+  color: var(--bc-sidebar-label-color);
+  background: rgba(255,255,255,0.06);
+  border-radius: 4px;
+  padding: 1px 6px;
+  white-space: nowrap;
+  flex-shrink: 0;
+}
+
+.bc-footer-controls {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.bc-select {
+  flex: 1;
+  background: rgba(255,255,255,0.06);
+  border: 1px solid rgba(255,255,255,0.1);
+  border-radius: 5px;
+  color: rgba(255,255,255,0.75);
+  font-size: 11.5px;
+  font-family: var(--bc-font);
+  padding: 3px 6px;
+  outline: none;
+  cursor: pointer;
+  min-width: 0;
+}
+
+.bc-select:focus { border-color: rgba(59,130,246,0.5); }
+
+.bc-logout {
+  display: flex;
+  align-items: center;
+  color: var(--bc-sidebar-text);
+  flex-shrink: 0;
+  padding: 4px;
+  border-radius: 4px;
+  transition: color var(--bc-transition);
+}
+
+.bc-logout:hover { color: #ef4444; }
+
+/* ============================================================
+   MAIN CONTENT AREA
+   ============================================================ */
+.bc-main {
+  flex: 1;
+  margin-left: var(--bc-sidebar-w);
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  min-height: 100vh;
+}
+
+.bc-main-auth {
+  margin-left: 0;
+}
+
+/* ---- Topbar (mobile only) ---- */
+.bc-topbar {
+  position: sticky;
+  top: 0;
+  z-index: 100;
+  height: 48px;
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 0 16px;
+  border-bottom: 1px solid var(--bs-border-color);
+  background: var(--bs-body-bg);
+}
+
+.bc-hamburger {
+  background: none;
+  border: none;
+  color: var(--bs-body-color);
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  padding: 4px;
+  border-radius: 4px;
+}
+
+.bc-topbar-logo {
+  font-size: 14px;
+  font-weight: 600;
+  text-decoration: none;
+  color: var(--bs-body-color);
+}
+
+/* ---- Content ---- */
+.bc-content {
+  flex: 1;
+  padding: 28px 32px;
+  max-width: var(--bc-content-max);
+  width: 100%;
+}
+
+/* ---- Overlay (mobile) ---- */
+.bc-overlay {
+  display: none;
+  position: fixed;
+  inset: 0;
+  background: rgba(0,0,0,0.5);
+  z-index: 150;
+}
+
+.bc-overlay.is-visible { display: block; }
+
+/* ============================================================
+   AUTH PAGES (login, setup)
+   ============================================================ */
+.bc-main-auth .bc-content {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 100vh;
+  padding: 32px 16px;
+}
+
+/* ============================================================
+   MOBILE SIDEBAR
+   ============================================================ */
+@media (max-width: 991px) {
+  .bc-sidebar {
+    transform: translateX(-100%);
+    transition: transform 220ms cubic-bezier(.4,0,.2,1);
+  }
+
+  .bc-sidebar.is-open {
+    transform: translateX(0);
+    box-shadow: 4px 0 32px rgba(0,0,0,0.3);
+  }
+
+  .bc-main {
+    margin-left: 0;
+  }
+}
+
+/* ============================================================
+   DARK THEME overrides
+   ============================================================ */
+[data-bs-theme="dark"] .bc-main {
+  background: var(--bc-main-bg-dark);
+}
+
+[data-bs-theme="light"] .bc-main {
+  background: var(--bc-main-bg);
+}
+
+/* ============================================================
+   CONTENT TYPOGRAPHY & UTILITIES
+   ============================================================ */
+
+/* Page headings */
+.bc-content h2 {
+  font-size: 20px;
+  font-weight: 600;
+  margin-bottom: 20px;
+  letter-spacing: -.02em;
+}
+
+.bc-content h3 {
+  font-size: 16px;
+  font-weight: 600;
+}
+
+/* Tables */
+.table {
+  font-size: 13.5px;
+}
+
+.table thead th {
+  font-size: 11.5px;
+  font-weight: 600;
+  letter-spacing: .04em;
+  text-transform: uppercase;
+  opacity: .6;
+  border-bottom-width: 1px;
+  white-space: nowrap;
+}
+
+/* Cards */
+.card {
+  border-radius: var(--bc-radius);
+}
+
+/* Mono values (log lines, codes, etc.) */
+code, kbd, pre, .bc-mono {
+  font-family: var(--bc-mono);
+  font-size: 12.5px;
+}
+
+/* Compact definition lists */
+.dl-compact dt { white-space: nowrap; }
 .dl-compact .ellipsis-field {
   min-width: 0;
   overflow: hidden;
@@ -27,7 +436,6 @@ main.dashboard-container {
   white-space: nowrap;
   cursor: pointer;
 }
-
 .dl-compact .ellipsis-field.is-expanded {
   overflow: visible;
   text-overflow: clip;
@@ -35,55 +443,46 @@ main.dashboard-container {
   cursor: text;
 }
 
-/* Markdown rendering (e.g., changelog page) */
-.markdown-content {
-  overflow-wrap: anywhere;
-}
-
-.markdown-content h1,
-.markdown-content h2,
-.markdown-content h3,
-.markdown-content h4,
-.markdown-content h5,
-.markdown-content h6 {
+/* Markdown content */
+.markdown-content { overflow-wrap: anywhere; }
+.markdown-content h1,.markdown-content h2,.markdown-content h3,
+.markdown-content h4,.markdown-content h5,.markdown-content h6 {
   margin-top: 1.25rem;
-  margin-bottom: 0.75rem;
+  margin-bottom: .75rem;
 }
-
-.markdown-content p {
-  margin-bottom: 0.75rem;
-}
-
-.markdown-content ul,
-.markdown-content ol {
-  margin-bottom: 0.75rem;
-}
-
+.markdown-content p { margin-bottom: .75rem; }
+.markdown-content ul, .markdown-content ol { margin-bottom: .75rem; }
 .markdown-content pre {
-  padding: 0.75rem;
-  border-radius: 0.5rem;
-  background: rgba(0, 0, 0, 0.05);
+  padding: .75rem;
+  border-radius: .5rem;
+  background: rgba(0,0,0,.05);
   overflow: auto;
 }
-
-.markdown-content code {
-  font-size: 0.95em;
+.markdown-content code { font-size: .95em; }
+.markdown-content table { width: 100%; margin-bottom: 1rem; }
+.markdown-content table th, .markdown-content table td {
+  padding: .5rem;
+  border-top: 1px solid rgba(0,0,0,.15);
 }
-
-.markdown-content table {
-  width: 100%;
-  margin-bottom: 1rem;
-}
-
-.markdown-content table th,
-.markdown-content table td {
-  padding: 0.5rem;
-  border-top: 1px solid rgba(0, 0, 0, 0.15);
-}
-
 .markdown-content blockquote {
-  border-left: 0.25rem solid rgba(0, 0, 0, 0.15);
-  padding-left: 0.75rem;
+  border-left: .25rem solid rgba(0,0,0,.15);
+  padding-left: .75rem;
   margin-left: 0;
-  color: rgba(0, 0, 0, 0.7);
+  color: rgba(0,0,0,.7);
+}
+
+/* Alerts */
+.bc-alerts { max-width: 800px; }
+
+/* Info block (was used in run_checks) */
+.info-block {
+  font-size: 13.5px;
+  color: var(--bs-secondary-color);
+  max-width: 860px;
+}
+
+/* Legacy compatibility: content-container / dashboard-container */
+main.content-container,
+main.dashboard-container {
+  /* Replaced by .bc-content — these are no-ops now but kept for safety */
 }
diff --git a/containers/backupchecks/src/templates/documentation/base.html b/containers/backupchecks/src/templates/documentation/base.html
index d26b043..7cb7010 100644
--- a/containers/backupchecks/src/templates/documentation/base.html
+++ b/containers/backupchecks/src/templates/documentation/base.html
@@ -4,8 +4,6 @@
 <link rel="stylesheet" href="{{ url_for('static', filename='css/documentation.css') }}">
 {% endblock %}
 
-{% block main_class %}container-fluid content-container{% endblock %}
-
 {% block content %}
 <div class="documentation-container">
   <div class="row g-0">
diff --git a/containers/backupchecks/src/templates/layout/base.html b/containers/backupchecks/src/templates/layout/base.html
index 7bdcd11..918e63b 100644
--- a/containers/backupchecks/src/templates/layout/base.html
+++ b/containers/backupchecks/src/templates/layout/base.html
@@ -3,12 +3,12 @@
 <html lang="en" data-theme-preference="{{ _theme_pref }}">
   <head>
     <meta charset="utf-8" />
-    <title>Backupchecks</title>
+    <title>{% block title %}Backupchecks{% endblock %}</title>
     <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <link
-      href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css"
-      rel="stylesheet"
-    />
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" />
+    <link rel="preconnect" href="https://fonts.googleapis.com" />
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
+    <link href="https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@400;500;600&display=swap" rel="stylesheet" />
     <link rel="stylesheet" href="{{ url_for('static', filename='css/layout.css') }}" />
     <link rel="stylesheet" href="{{ url_for('static', filename='css/status-text.css') }}" />
     <link rel="stylesheet" href="{{ url_for('static', filename='css/sandbox.css') }}" />
@@ -21,349 +21,288 @@
           var root = document.documentElement;
           var pref = root.getAttribute('data-theme-preference') || 'auto';
           var mq = window.matchMedia ? window.matchMedia('(prefers-color-scheme: dark)') : null;
-
           function applyTheme() {
             var theme = pref;
-            if (pref === 'auto') {
-              theme = (mq && mq.matches) ? 'dark' : 'light';
-            }
+            if (pref === 'auto') { theme = (mq && mq.matches) ? 'dark' : 'light'; }
             root.setAttribute('data-bs-theme', theme);
+            root.setAttribute('data-theme', theme);
           }
-
           applyTheme();
-
           if (mq && typeof mq.addEventListener === 'function') {
             mq.addEventListener('change', function () {
-              if ((root.getAttribute('data-theme-preference') || 'auto') === 'auto') {
-                applyTheme();
-              }
-            });
-          } else if (mq && typeof mq.addListener === 'function') {
-            // Safari fallback
-            mq.addListener(function () {
-              if ((root.getAttribute('data-theme-preference') || 'auto') === 'auto') {
-                applyTheme();
-              }
+              if ((root.getAttribute('data-theme-preference') || 'auto') === 'auto') { applyTheme(); }
             });
           }
-        } catch (e) {
-          // no-op
-        }
+        } catch (e) {}
       })();
     </script>
   </head>
-  <body>
+  <body class="bc-body">
+
     {% if system_settings and system_settings.is_sandbox_environment %}
-    <div class="sandbox-banner">
-      <span class="sandbox-banner-text">SANDBOX</span>
-    </div>
+    <div class="sandbox-banner"><span class="sandbox-banner-text">SANDBOX</span></div>
     {% endif %}
 
-    <nav class="navbar navbar-expand-lg fixed-top bg-body-tertiary border-bottom">
-      <div class="container-fluid">
-        <a class="navbar-brand" href="{{ url_for('main.dashboard') }}">Backupchecks</a>
-        <button
-          class="navbar-toggler"
-          type="button"
-          data-bs-toggle="collapse"
-          data-bs-target="#navbarNav"
-          aria-controls="navbarNav"
-          aria-expanded="false"
-          aria-label="Toggle navigation"
-        >
-          <span class="navbar-toggler-icon"></span>
-        </button>
-        <div class="collapse navbar-collapse" id="navbarNav">
-          {% if current_user.is_authenticated %}
-          <ul class="navbar-nav me-auto mb-2 mb-lg-0">
-            {% if active_role == 'reporter' %}
-            <li class="nav-item">
-              <a class="nav-link" href="{{ url_for('main.reports') }}">Reports</a>
-            </li>
-            <li class="nav-item">
-              <a class="nav-link {% if request.path.startswith('/documentation') %}active{% endif %}" href="{{ url_for('documentation.index') }}">
-                <span class="nav-icon">📖</span> Documentation
-              </a>
-            </li>
-            <li class="nav-item">
-              <a class="nav-link" href='{{ url_for("main.changelog_page") }}'>Changelog</a>
-            </li>
-            <li class="nav-item">
-              <a class="nav-link" href="{{ url_for('main.feedback_page') }}">Feedback</a>
-            </li>
-            {% else %}
-            <li class="nav-item">
-              <a class="nav-link" href="{{ url_for('main.inbox') }}">Inbox</a>
-            </li>
-            {% if active_role == 'viewer' %}
-            <li class="nav-item">
-              <a class="nav-link" href="{{ url_for('main.customers') }}">Customers</a>
-            </li>
-            <li class="nav-item">
-              <a class="nav-link" href="{{ url_for('main.jobs') }}">Jobs</a>
-            </li>
-            {% endif %}
-            {% if system_settings and system_settings.cove_enabled and active_role in ('admin', 'operator') %}
-            <li class="nav-item">
-              <a class="nav-link" href="{{ url_for('main.cove_accounts') }}">Cove Accounts</a>
-            </li>
-            {% endif %}
-            {% if active_role in ('admin', 'operator') %}
-            <li class="nav-item">
-              <a class="nav-link" href="{{ url_for('main.run_checks_page') }}">Run Checks</a>
-            </li>
-            {% endif %}
-            <li class="nav-item">
-              <a class="nav-link" href="{{ url_for('main.reports') }}">Reports</a>
-            </li>
-            <li class="nav-item dropdown">
-              <a class="nav-link dropdown-toggle" href="#" id="moreMenu" role="button" data-bs-toggle="dropdown" aria-expanded="false">
-                More
-              </a>
-              <ul class="dropdown-menu" aria-labelledby="moreMenu">
-                <li><a class="dropdown-item" href="{{ url_for('main.daily_jobs') }}">Daily Jobs</a></li>
-                {% if active_role != 'viewer' %}
-                <li><a class="dropdown-item" href="{{ url_for('main.customers') }}">Customers</a></li>
-                <li><a class="dropdown-item" href="{{ url_for('main.jobs') }}">Jobs</a></li>
-                {% endif %}
-                <li><a class="dropdown-item" href="{{ url_for('main.tickets_page') }}">Tickets</a></li>
-                <li><a class="dropdown-item" href="{{ url_for('main.overrides') }}">Overrides</a></li>
-                <li><a class="dropdown-item {% if request.path.startswith('/documentation') %}active{% endif %}" href="{{ url_for('documentation.index') }}">Documentation</a></li>
-                <li><a class="dropdown-item" href='{{ url_for("main.changelog_page") }}'>Changelog</a></li>
-                <li><a class="dropdown-item" href="{{ url_for('main.feedback_page') }}">Feedback</a></li>
-              </ul>
-            </li>
-            {% if active_role == 'admin' %}
-            <li class="nav-item dropdown">
-              <a class="nav-link dropdown-toggle" href="#" id="adminMenu" role="button" data-bs-toggle="dropdown" aria-expanded="false">
-                Admin
-              </a>
-              <ul class="dropdown-menu" aria-labelledby="adminMenu">
-                <li><a class="dropdown-item" href="{{ url_for('main.admin_all_mails') }}">All Mail</a></li>
-                <li><a class="dropdown-item" href="{{ url_for('main.inbox_deleted_mails') }}">Deleted mails</a></li>
-                <li><a class="dropdown-item" href="{{ url_for('main.archived_jobs') }}">Archived Jobs</a></li>
-                <li><a class="dropdown-item" href="{{ url_for('main.settings') }}">Settings</a></li>
-                <li><a class="dropdown-item" href="{{ url_for('main.logging_page') }}">Logging</a></li>
-                <li><a class="dropdown-item" href="{{ url_for('main.parsers_overview') }}">Parsers</a></li>
-              </ul>
-            </li>
-            {% endif %}
-            {% endif %}
-          </ul>
-          <form method="get" action="{{ url_for('main.search_page') }}" class="d-flex me-3 mb-2 mb-lg-0" role="search" autocomplete="off">
-            <input
-              class="form-control form-control-sm me-2"
-              type="search"
-              name="q"
-              placeholder="Search"
-              aria-label="Search"
-              value="{{ request.args.get('q','') if request.path == url_for('main.search_page') else '' }}"
-              style="min-width: 220px;"
-            />
-            <button class="btn btn-outline-secondary btn-sm" type="submit">Search</button>
-          </form>
-          <span class="navbar-text me-3">
-            <a class="text-decoration-none" href="{{ url_for('main.user_settings') }}">
-              {{ current_user.username }} ({{ active_role }})
-            </a>
+    {% if current_user.is_authenticated %}
+    <!-- SIDEBAR -->
+    <nav class="bc-sidebar" id="bcSidebar">
+      <div class="bc-sidebar-header">
+        <a class="bc-logo" href="{{ url_for('main.dashboard') }}">
+          <span class="bc-logo-icon">
+            <svg width="20" height="20" viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+              <rect x="2" y="2" width="7" height="7" rx="1.5" fill="currentColor" opacity="0.9"/>
+              <rect x="11" y="2" width="7" height="7" rx="1.5" fill="currentColor" opacity="0.5"/>
+              <rect x="2" y="11" width="7" height="7" rx="1.5" fill="currentColor" opacity="0.5"/>
+              <rect x="11" y="11" width="7" height="7" rx="1.5" fill="currentColor" opacity="0.25"/>
+            </svg>
           </span>
-          
+          <span class="bc-logo-text">Backupchecks</span>
+        </a>
+        <button class="bc-sidebar-toggle d-lg-none" id="bcSidebarClose" aria-label="Close menu">
+          <svg width="18" height="18" viewBox="0 0 18 18" fill="none"><path d="M2 2l14 14M16 2L2 16" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg>
+        </button>
+      </div>
+
+      <div class="bc-sidebar-search">
+        <form method="get" action="{{ url_for('main.search_page') }}" autocomplete="off" class="bc-search-form">
+          <svg class="bc-search-icon" width="14" height="14" viewBox="0 0 14 14" fill="none"><circle cx="6" cy="6" r="4.5" stroke="currentColor" stroke-width="1.5"/><path d="M10 10l2.5 2.5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"/></svg>
+          <input
+            class="bc-search-input"
+            type="search"
+            name="q"
+            placeholder="Search..."
+            aria-label="Search"
+            value="{{ request.args.get('q','') if request.path == url_for('main.search_page') else '' }}"
+          />
+        </form>
+      </div>
+
+      <div class="bc-nav-section">
+        {% if active_role == 'reporter' %}
+          {{ bc_nav_item('main.reports', 'Reports', icon_bars()) }}
+          {{ bc_nav_item('documentation.index', 'Documentation', icon_book(), startswith='/documentation') }}
+          {{ bc_nav_item('main.changelog_page', 'Changelog', icon_clock()) }}
+          {{ bc_nav_item('main.feedback_page', 'Feedback', icon_chat()) }}
+        {% else %}
+          {{ bc_nav_item('main.dashboard', 'Dashboard', icon_grid()) }}
+          {{ bc_nav_item('main.inbox', 'Inbox', icon_inbox(), badge=inbox_count if inbox_count is defined and inbox_count > 0 else none) }}
+          {% if active_role in ('admin', 'operator') %}
+            {{ bc_nav_item('main.run_checks_page', 'Run Checks', icon_check()) }}
+          {% endif %}
+          {{ bc_nav_item('main.daily_jobs', 'Daily Jobs', icon_calendar()) }}
+          {{ bc_nav_item('main.reports', 'Reports', icon_bars()) }}
+
+          <div class="bc-nav-divider"></div>
+          <div class="bc-nav-label">Manage</div>
+
+          {% if active_role != 'viewer' %}
+            {{ bc_nav_item('main.customers', 'Customers', icon_building()) }}
+            {{ bc_nav_item('main.jobs', 'Jobs', icon_server()) }}
+          {% else %}
+            {{ bc_nav_item('main.customers', 'Customers', icon_building()) }}
+            {{ bc_nav_item('main.jobs', 'Jobs', icon_server()) }}
+          {% endif %}
+          {{ bc_nav_item('main.tickets_page', 'Tickets', icon_ticket()) }}
+          {{ bc_nav_item('main.overrides', 'Overrides', icon_shield()) }}
+
+          {% if system_settings and system_settings.cove_enabled and active_role in ('admin', 'operator') %}
+            {{ bc_nav_item('main.cove_accounts', 'Cove Accounts', icon_cloud()) }}
+          {% endif %}
+
+          <div class="bc-nav-divider"></div>
+          <div class="bc-nav-label">Info</div>
+
+          {{ bc_nav_item('documentation.index', 'Documentation', icon_book(), startswith='/documentation') }}
+          {{ bc_nav_item('main.changelog_page', 'Changelog', icon_clock()) }}
+          {{ bc_nav_item('main.feedback_page', 'Feedback', icon_chat()) }}
+
+          {% if active_role == 'admin' %}
+            <div class="bc-nav-divider"></div>
+            <div class="bc-nav-label">Admin</div>
+            {{ bc_nav_item('main.admin_all_mails', 'All Mail', icon_mail()) }}
+            {{ bc_nav_item('main.inbox_deleted_mails', 'Deleted Mail', icon_trash()) }}
+            {{ bc_nav_item('main.archived_jobs', 'Archived Jobs', icon_archive()) }}
+            {{ bc_nav_item('main.settings', 'Settings', icon_cog()) }}
+            {{ bc_nav_item('main.logging_page', 'Logging', icon_log()) }}
+            {{ bc_nav_item('main.parsers_overview', 'Parsers', icon_code()) }}
+          {% endif %}
+        {% endif %}
+      </div>
+
+      <div class="bc-sidebar-footer">
+        <div class="bc-user-block">
+          <a class="bc-user-name" href="{{ url_for('main.user_settings') }}">{{ current_user.username }}</a>
+          <span class="bc-user-role">{{ active_role }}</span>
+        </div>
+        <div class="bc-footer-controls">
           {% if current_user.is_authenticated and user_roles|length > 1 %}
-          <form method="post" action="{{ url_for('main.set_active_role_route') }}" class="me-2">
-            <select
-              class="form-select form-select-sm"
-              name="active_role"
-              aria-label="Role"
-              onchange="this.form.submit()"
-              style="min-width: 10rem; width: auto;"
-            >
+          <form method="post" action="{{ url_for('main.set_active_role_route') }}" class="bc-role-form">
+            <select class="bc-select" name="active_role" aria-label="Role" onchange="this.form.submit()">
               {% for r in user_roles %}
               <option value="{{ r }}" {% if r == active_role %}selected{% endif %}>{{ r|capitalize }}</option>
               {% endfor %}
             </select>
           </form>
           {% endif %}
-<form method="post" action="{{ url_for('main.set_theme_preference') }}" class="me-2">
-            <select
-              class="form-select form-select-sm"
-              name="theme"
-              aria-label="Theme"
-              onchange="this.form.submit()"
-              style="width: auto;"
-            >
-              <option value="light" {% if _theme_pref == 'light' %}selected{% endif %}>Light</option>
-              <option value="dark" {% if _theme_pref == 'dark' %}selected{% endif %}>Dark</option>
-              <option value="auto" {% if _theme_pref == 'auto' %}selected{% endif %}>Auto</option>
+          <form method="post" action="{{ url_for('main.set_theme_preference') }}" class="bc-theme-form">
+            <select class="bc-select" name="theme" aria-label="Theme" onchange="this.form.submit()">
+              <option value="light" {% if _theme_pref == 'light' %}selected{% endif %}>☀ Light</option>
+              <option value="dark" {% if _theme_pref == 'dark' %}selected{% endif %}>◑ Dark</option>
+              <option value="auto" {% if _theme_pref == 'auto' %}selected{% endif %}>◎ Auto</option>
             </select>
           </form>
-          <a class="btn btn-outline-secondary" href="{{ url_for('auth.logout') }}">Logout</a>
-          {% endif %}
+          <a class="bc-logout" href="{{ url_for('auth.logout') }}" title="Logout">
+            <svg width="16" height="16" viewBox="0 0 16 16" fill="none"><path d="M6 2H3a1 1 0 00-1 1v10a1 1 0 001 1h3M10 11l3-3-3-3M13 8H6" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/></svg>
+          </a>
         </div>
       </div>
     </nav>
 
-    <main class="{% block main_class %}container content-container{% endblock %}" id="main-content">
-      {% with messages = get_flashed_messages(with_categories=true) %}
-        {% if messages %}
-          <div class="mb-3">
-            {% for category, message in messages %}
-              <div class="alert alert-{{ category }} alert-dismissible fade show" role="alert">
-                {{ message }}
-                <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
-              </div>
-            {% endfor %}
-          </div>
-        {% endif %}
-      {% endwith %}
+    <!-- Mobile overlay -->
+    <div class="bc-overlay" id="bcOverlay"></div>
+    {% endif %}
 
-      {% block content %}{% endblock %}
-    </main>
+    <!-- MAIN CONTENT -->
+    <div class="bc-main {% if not current_user.is_authenticated %}bc-main-auth{% endif %}">
+
+      {% if current_user.is_authenticated %}
+      <header class="bc-topbar d-lg-none">
+        <button class="bc-hamburger" id="bcHamburger" aria-label="Open menu">
+          <svg width="20" height="20" viewBox="0 0 20 20" fill="none"><path d="M3 5h14M3 10h14M3 15h14" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"/></svg>
+        </button>
+        <a class="bc-topbar-logo" href="{{ url_for('main.dashboard') }}">Backupchecks</a>
+      </header>
+      {% endif %}
+
+      <div class="bc-content {% block content_class %}{% endblock %}">
+        {% with messages = get_flashed_messages(with_categories=true) %}
+          {% if messages %}
+            <div class="bc-alerts mb-4">
+              {% for category, message in messages %}
+                <div class="alert alert-{{ category }} alert-dismissible fade show" role="alert">
+                  {{ message }}
+                  <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
+                </div>
+              {% endfor %}
+            </div>
+          {% endif %}
+        {% endwith %}
+
+        {% block content %}{% endblock %}
+      </div>
+    </div>
 
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
 
     <script>
-      // Dynamic navbar height adjustment
-      (function () {
-        function adjustContentPadding() {
-          try {
-            var navbar = document.querySelector('.navbar.fixed-top');
-            var mainContent = document.getElementById('main-content');
-            if (!navbar || !mainContent) return;
+    (function () {
+      // Sidebar mobile toggle
+      var sidebar = document.getElementById('bcSidebar');
+      var overlay = document.getElementById('bcOverlay');
+      var hamburger = document.getElementById('bcHamburger');
+      var closeBtn = document.getElementById('bcSidebarClose');
 
-            // Get actual navbar height
-            var navbarHeight = navbar.offsetHeight;
+      function openSidebar() {
+        if (!sidebar) return;
+        sidebar.classList.add('is-open');
+        if (overlay) overlay.classList.add('is-visible');
+        document.body.classList.add('sidebar-open');
+      }
 
-            // Add small buffer (20px) for visual spacing
-            var paddingTop = navbarHeight + 20;
+      function closeSidebar() {
+        if (!sidebar) return;
+        sidebar.classList.remove('is-open');
+        if (overlay) overlay.classList.remove('is-visible');
+        document.body.classList.remove('sidebar-open');
+      }
 
-            // Apply padding to main content
-            mainContent.style.paddingTop = paddingTop + 'px';
-          } catch (e) {
-            // Fallback to 80px if something goes wrong
-            var mainContent = document.getElementById('main-content');
-            if (mainContent) {
-              mainContent.style.paddingTop = '80px';
-            }
-          }
-        }
+      if (hamburger) hamburger.addEventListener('click', openSidebar);
+      if (closeBtn) closeBtn.addEventListener('click', closeSidebar);
+      if (overlay) overlay.addEventListener('click', closeSidebar);
 
-        // Run on page load
-        if (document.readyState === 'loading') {
-          document.addEventListener('DOMContentLoaded', adjustContentPadding);
-        } else {
-          adjustContentPadding();
-        }
+      // Ellipsis field behavior (preserved from original)
+      function isOverflowing(el) {
+        try { return el && el.scrollWidth > el.clientWidth; } catch(e) { return false; }
+      }
 
-        // Run after navbar is fully rendered
-        window.addEventListener('load', adjustContentPadding);
+      function setEllipsisTitle(el) {
+        if (!el || el.classList.contains('is-expanded')) return;
+        var txt = (el.textContent || '').trim();
+        if (!txt) { el.removeAttribute('title'); return; }
+        if (isOverflowing(el)) { el.setAttribute('title', txt); } else { el.removeAttribute('title'); }
+      }
 
-        // Run on window resize
-        var resizeTimeout;
-        window.addEventListener('resize', function () {
-          clearTimeout(resizeTimeout);
-          resizeTimeout = setTimeout(adjustContentPadding, 100);
-        });
+      function collapseExpandedEllipsis(root) {
+        try {
+          if (!root || !root.querySelectorAll) return;
+          root.querySelectorAll('.ellipsis-field.is-expanded').forEach(function(el) {
+            el.classList.remove('is-expanded'); setEllipsisTitle(el);
+          });
+        } catch(e) {}
+      }
 
-        // Run when navbar collapse is toggled
-        var navbarCollapse = document.getElementById('navbarNav');
-        if (navbarCollapse) {
-          navbarCollapse.addEventListener('shown.bs.collapse', adjustContentPadding);
-          navbarCollapse.addEventListener('hidden.bs.collapse', adjustContentPadding);
-        }
-      })();
+      document.addEventListener('click', function(e) {
+        var el = e.target;
+        if (!el || !el.classList || !el.classList.contains('ellipsis-field')) return;
+        if (e.target.closest && e.target.closest('a, button, input, select, textarea, label')) return;
+        el.classList.toggle('is-expanded');
+        if (el.classList.contains('is-expanded')) { el.removeAttribute('title'); } else { setEllipsisTitle(el); }
+      });
+
+      document.addEventListener('dblclick', function(e) {
+        var el = e.target;
+        if (!el || !el.classList || !el.classList.contains('ellipsis-field')) return;
+        el.classList.add('is-expanded'); el.removeAttribute('title');
+        try {
+          var range = document.createRange(); range.selectNodeContents(el);
+          var sel = window.getSelection(); sel.removeAllRanges(); sel.addRange(range);
+        } catch(err) {}
+      });
+
+      document.addEventListener('mouseover', function(e) {
+        var el = e.target;
+        if (!el || !el.classList || !el.classList.contains('ellipsis-field')) return;
+        setEllipsisTitle(el);
+      });
+
+      document.addEventListener('show.bs.modal', function(e) { collapseExpandedEllipsis(e.target); });
+      document.addEventListener('hidden.bs.modal', function(e) { collapseExpandedEllipsis(e.target); });
+      document.addEventListener('show.bs.offcanvas', function(e) { collapseExpandedEllipsis(e.target); });
+      document.addEventListener('hidden.bs.offcanvas', function(e) { collapseExpandedEllipsis(e.target); });
+    })();
     </script>
 
-    <script>
-      (function () {
-        function isOverflowing(el) {
-          try {
-            return el && el.scrollWidth > el.clientWidth;
-          } catch (e) {
-            return false;
-          }
-        }
-
-        function collapseExpandedEllipsis(root) {
-          try {
-            if (!root || !root.querySelectorAll) return;
-            var expanded = root.querySelectorAll('.ellipsis-field.is-expanded');
-            if (!expanded || !expanded.length) return;
-            expanded.forEach(function (el) {
-              el.classList.remove('is-expanded');
-              setEllipsisTitle(el);
-            });
-          } catch (e) {
-            // no-op
-          }
-        }
-
-        function setEllipsisTitle(el) {
-          if (!el || el.classList.contains('is-expanded')) {
-            return;
-          }
-          var txt = (el.textContent || '').trim();
-          if (!txt) {
-            el.removeAttribute('title');
-            return;
-          }
-          if (isOverflowing(el)) {
-            el.setAttribute('title', txt);
-          } else {
-            el.removeAttribute('title');
-          }
-        }
-
-        document.addEventListener('click', function (e) {
-          var el = e.target;
-          if (!el) return;
-          if (!el.classList || !el.classList.contains('ellipsis-field')) return;
-          // Ignore clicks on interactive children
-          if (e.target.closest && e.target.closest('a, button, input, select, textarea, label')) return;
-          el.classList.toggle('is-expanded');
-          if (el.classList.contains('is-expanded')) {
-            el.removeAttribute('title');
-          } else {
-            setEllipsisTitle(el);
-          }
-        });
-
-        document.addEventListener('dblclick', function (e) {
-          var el = e.target;
-          if (!el || !el.classList || !el.classList.contains('ellipsis-field')) return;
-          // Expand on double click and select all text
-          el.classList.add('is-expanded');
-          el.removeAttribute('title');
-          try {
-            var range = document.createRange();
-            range.selectNodeContents(el);
-            var sel = window.getSelection();
-            sel.removeAllRanges();
-            sel.addRange(range);
-          } catch (err) {
-            // no-op
-          }
-        });
-
-        document.addEventListener('mouseover', function (e) {
-          var el = e.target;
-          if (!el || !el.classList || !el.classList.contains('ellipsis-field')) return;
-          setEllipsisTitle(el);
-        });
-
-        // Ensure expanded fields do not persist between popup/modal openings.
-        document.addEventListener('show.bs.modal', function (e) {
-          collapseExpandedEllipsis(e.target);
-        });
-        document.addEventListener('hidden.bs.modal', function (e) {
-          collapseExpandedEllipsis(e.target);
-        });
-        document.addEventListener('show.bs.offcanvas', function (e) {
-          collapseExpandedEllipsis(e.target);
-        });
-        document.addEventListener('hidden.bs.offcanvas', function (e) {
-          collapseExpandedEllipsis(e.target);
-        });
-      })();
-    </script>
+    {% block scripts %}{% endblock %}
   </body>
 </html>
+
+{# ===== ICON MACROS ===== #}
+{% macro icon_grid() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><rect x="1" y="1" width="5.5" height="5.5" rx="1" fill="currentColor"/><rect x="8.5" y="1" width="5.5" height="5.5" rx="1" fill="currentColor" opacity=".5"/><rect x="1" y="8.5" width="5.5" height="5.5" rx="1" fill="currentColor" opacity=".5"/><rect x="8.5" y="8.5" width="5.5" height="5.5" rx="1" fill="currentColor" opacity=".25"/></svg>{% endmacro %}
+{% macro icon_inbox() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><path d="M1 9.5l2.5-5h8L14 9.5V13a1 1 0 01-1 1H2a1 1 0 01-1-1V9.5z" stroke="currentColor" stroke-width="1.3"/><path d="M1 9.5h3.5a2 2 0 004 0H14" stroke="currentColor" stroke-width="1.3"/></svg>{% endmacro %}
+{% macro icon_check() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><path d="M2.5 7.5l3.5 3.5 6.5-6.5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/></svg>{% endmacro %}
+{% macro icon_calendar() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><rect x="1" y="3" width="13" height="11" rx="1.5" stroke="currentColor" stroke-width="1.3"/><path d="M5 1v4M10 1v4M1 7h13" stroke="currentColor" stroke-width="1.3" stroke-linecap="round"/></svg>{% endmacro %}
+{% macro icon_bars() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><path d="M2 4h11M2 7.5h8M2 11h5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"/></svg>{% endmacro %}
+{% macro icon_building() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><rect x="1" y="3" width="9" height="11" rx="1" stroke="currentColor" stroke-width="1.3"/><path d="M10 6h3a1 1 0 011 1v7H10" stroke="currentColor" stroke-width="1.3"/><rect x="3" y="6" width="2" height="2" rx=".5" fill="currentColor"/><rect x="7" y="6" width="2" height="2" rx=".5" fill="currentColor"/><rect x="3" y="10" width="2" height="2" rx=".5" fill="currentColor"/><rect x="7" y="10" width="2" height="2" rx=".5" fill="currentColor"/></svg>{% endmacro %}
+{% macro icon_server() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><rect x="1" y="2" width="13" height="4" rx="1" stroke="currentColor" stroke-width="1.3"/><rect x="1" y="9" width="13" height="4" rx="1" stroke="currentColor" stroke-width="1.3"/><circle cx="11.5" cy="4" r=".8" fill="currentColor"/><circle cx="11.5" cy="11" r=".8" fill="currentColor"/></svg>{% endmacro %}
+{% macro icon_ticket() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><path d="M1 5a1 1 0 011-1h11a1 1 0 011 1v1.5a2 2 0 000 4V12a1 1 0 01-1 1H2a1 1 0 01-1-1v-1.5a2 2 0 000-4V5z" stroke="currentColor" stroke-width="1.3"/></svg>{% endmacro %}
+{% macro icon_shield() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><path d="M7.5 1.5l5 2v4c0 2.5-2 4.5-5 6-3-1.5-5-3.5-5-6v-4l5-2z" stroke="currentColor" stroke-width="1.3"/></svg>{% endmacro %}
+{% macro icon_cloud() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><path d="M3.5 10a3.5 3.5 0 01-.5-7 4.5 4.5 0 018.5 1.5A3 3 0 0112.5 10H3.5z" stroke="currentColor" stroke-width="1.3"/></svg>{% endmacro %}
+{% macro icon_book() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><path d="M3 2h8a1 1 0 011 1v10a1 1 0 01-1 1H3a1 1 0 01-1-1V3a1 1 0 011-1z" stroke="currentColor" stroke-width="1.3"/><path d="M5 5.5h5M5 8h5M5 10.5h3" stroke="currentColor" stroke-width="1.3" stroke-linecap="round"/></svg>{% endmacro %}
+{% macro icon_clock() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><circle cx="7.5" cy="7.5" r="5.5" stroke="currentColor" stroke-width="1.3"/><path d="M7.5 4.5v3l2 1.5" stroke="currentColor" stroke-width="1.3" stroke-linecap="round"/></svg>{% endmacro %}
+{% macro icon_chat() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><path d="M1 3a1 1 0 011-1h11a1 1 0 011 1v7a1 1 0 01-1 1H5l-3 3V3z" stroke="currentColor" stroke-width="1.3"/></svg>{% endmacro %}
+{% macro icon_mail() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><rect x="1" y="3" width="13" height="9" rx="1" stroke="currentColor" stroke-width="1.3"/><path d="M1 4l6.5 5L14 4" stroke="currentColor" stroke-width="1.3"/></svg>{% endmacro %}
+{% macro icon_trash() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><path d="M3 4h9M5 4V2.5a.5.5 0 01.5-.5h4a.5.5 0 01.5.5V4M6 7v4M9 7v4" stroke="currentColor" stroke-width="1.3" stroke-linecap="round"/><rect x="2" y="4" width="11" height="9" rx="1" stroke="currentColor" stroke-width="1.3"/></svg>{% endmacro %}
+{% macro icon_archive() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><rect x="1" y="2" width="13" height="3" rx="1" stroke="currentColor" stroke-width="1.3"/><path d="M2 5v7a1 1 0 001 1h9a1 1 0 001-1V5" stroke="currentColor" stroke-width="1.3"/><path d="M5.5 8.5h4" stroke="currentColor" stroke-width="1.3" stroke-linecap="round"/></svg>{% endmacro %}
+{% macro icon_cog() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><circle cx="7.5" cy="7.5" r="2" stroke="currentColor" stroke-width="1.3"/><path d="M7.5 1.5v1.3M7.5 12.2v1.3M1.5 7.5h1.3M12.2 7.5h1.3M3.3 3.3l.9.9M10.8 10.8l.9.9M3.3 11.7l.9-.9M10.8 4.2l.9-.9" stroke="currentColor" stroke-width="1.3" stroke-linecap="round"/></svg>{% endmacro %}
+{% macro icon_log() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><rect x="2" y="2" width="11" height="11" rx="1" stroke="currentColor" stroke-width="1.3"/><path d="M5 5h5M5 7.5h5M5 10h3" stroke="currentColor" stroke-width="1.3" stroke-linecap="round"/></svg>{% endmacro %}
+{% macro icon_code() %}<svg width="15" height="15" viewBox="0 0 15 15" fill="none"><path d="M4.5 5L1 7.5 4.5 10M10.5 5L14 7.5 10.5 10M8.5 3l-2 9" stroke="currentColor" stroke-width="1.3" stroke-linecap="round" stroke-linejoin="round"/></svg>{% endmacro %}
+
+{# ===== NAV ITEM MACRO ===== #}
+{% macro bc_nav_item(endpoint, label, icon_svg, badge=none, startswith=none) %}
+{% set _active = (startswith and request.path.startswith(startswith)) or (not startswith and request.path == url_for(endpoint)) %}
+<a class="bc-nav-item {% if _active %}is-active{% endif %}" href="{{ url_for(endpoint) }}">
+  <span class="bc-nav-icon">{{ icon_svg }}</span>
+  <span class="bc-nav-label-text">{{ label }}</span>
+  {% if badge %}<span class="bc-nav-badge">{{ badge }}</span>{% endif %}
+</a>
+{% endmacro %}
diff --git a/containers/backupchecks/src/templates/main/dashboard.html b/containers/backupchecks/src/templates/main/dashboard.html
index e244619..35a64b6 100644
--- a/containers/backupchecks/src/templates/main/dashboard.html
+++ b/containers/backupchecks/src/templates/main/dashboard.html
@@ -1,5 +1,4 @@
 {% extends "layout/base.html" %}
-{% block main_class %}container dashboard-container{% endblock %}
 {% block content %}
 <h2 class="mb-4">Dashboard</h2>
 
diff --git a/docs/changelog-claude.md b/docs/changelog-claude.md
index 35474b4..d4ddc67 100644
--- a/docs/changelog-claude.md
+++ b/docs/changelog-claude.md
@@ -2,6 +2,20 @@
 
 This file documents all changes made to this project via Claude Code.
 
+## [2026-03-19]
+
+### Changed
+- Redesigned application layout to sidebar-first design system (Layout v2):
+  - `static/css/layout.css` completely rewritten with IBM Plex Sans/Mono fonts, CSS design tokens, and a fixed dark sidebar (`--bc-sidebar-w: 220px`)
+  - `templates/layout/base.html` updated: Google Fonts preload for IBM Plex, `bc-body` class, sidebar-aware structure, simplified dark-mode JS
+  - `templates/documentation/base.html` and `templates/main/dashboard.html` aligned to new layout structure
+- Missed-run generation and Autotask ticket polling now run in a background daemon thread on Run Checks page load:
+  - Prevents page-load delay caused by heavy DB operations
+  - Throttled per job (10-minute minimum interval) to avoid pile-up
+  - Single `_bg_sweep_lock` guard prevents concurrent sweeps
+- Cove import manual run now logs and displays per-skip-reason breakdown (`reasons=` in audit log and flash message)
+- Cove timestamp parsing now supports additional formats: epoch milliseconds, epoch microseconds/nanoseconds, and .NET JSON Date strings (`/Date(ms)/`)
+
 ## [2026-03-12]
 
 ### Fixed