@media (max-width: 640px) {
  .upload-shell { grid-template-columns: 1fr; gap: var(--space-5); }
  .upload-panel { padding: var(--space-4); }
  .topbar-title { font-size: var(--font-size-16); }

  body { font-size: var(--font-size-14); }
  .main {
    padding: 0.85rem;
    padding-bottom: calc(96px + env(safe-area-inset-bottom));
  }

  header { padding: 0.65rem 0.75rem; gap: 6px; flex-wrap: wrap; }
  .header-logo { font-size: var(--font-size-20); }
  .header-meta { display: none; }
  .btn-reset { padding: 5px 10px; font-size: var(--font-size-11); }
  #period-badge { order: 3; }

  .nav-tabs {
    width: 100%; overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; white-space: nowrap;
    display: flex; flex-wrap: nowrap;
  }
  .nav-tabs::-webkit-scrollbar { display: none; }
  .nav-tab { padding: 10px 12px; font-size: var(--font-size-12); flex-shrink: 0; min-width: 56px; }

  .section-title { font-size: var(--font-size-16); letter-spacing: 0.08em; }
  .stats-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; }
  .stat-value { font-size: var(--font-size-26); }
  .stat-card .sc-tip { left: 0; transform: none; width: 180px; }

  .heatmap-wrap { padding: 0.75rem; overflow-x: auto; }
  .heatmap-header { flex-direction: column; align-items: flex-start; gap: 4px; }
  .hm-stats-row { grid-template-columns: repeat(2, minmax(0,1fr)) !important; gap: 6px; }
  .hm-stat-value { font-size: var(--font-size-22); }

  .two-col { gap: 8px; grid-template-columns: 1fr; }
  .chart-card { padding: 0.85rem; }

  .ex-controls { gap: 6px; }
  .ex-search { min-width: 0; font-size: var(--font-size-13); }
  select.ex-select { font-size: var(--font-size-12); padding: 7px 28px 7px 10px; }

  .ex-grid { grid-template-columns: 1fr; gap: 8px; }
  .ex-card { padding: 0.75rem 1rem; }
  .ex-card-name { font-size: var(--font-size-13); padding-right: 52px; }
  .ex-delta { font-size: var(--font-size-11); top: 0.75rem; right: 0.75rem; }

  #detail-overlay { padding: 0; align-items: flex-end; }
  .detail-modal {
    border-radius: var(--radius-panel) var(--radius-panel) 0 0;
    max-height: 92vh; overflow-y: auto;
    padding: 1rem 0.875rem calc(1rem + env(safe-area-inset-bottom));
    margin: 0;
  }
  .detail-name { font-size: var(--font-size-20); padding-right: 2.5rem; }
  .detail-kpis { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px; }
  .detail-kpi { padding: 8px 10px; }
  .detail-kpi-value { font-size: var(--font-size-14); }
  .detail-kpi-label { font-size: var(--font-size-9); }
  .kpi-wrap .kpi-tip { left: 0; transform: none; width: 160px; }

  .chart-toggle {
    overflow-x: auto; -webkit-overflow-scrolling: touch;
    scrollbar-width: none; white-space: nowrap;
    width: 100%; display: flex; flex-wrap: nowrap; gap: 6px;
  }
  .chart-toggle::-webkit-scrollbar { display: none; }
  .toggle-btn { flex-shrink: 0; font-size: var(--font-size-11); padding: 7px 12px; min-height: 36px; }
  .metric-toggle { flex-shrink: 0; }

  .session-filter-wrap { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
  .session-filter-wrap::-webkit-scrollbar { display: none; }
  .session-chips { flex-wrap: nowrap; }
  .session-chip { flex-shrink: 0; }

  .chart-wrap { height: 220px !important; }
  .chart-canvas-sm { height: 180px; }

  .history-table th:nth-child(2),
  .history-table td:nth-child(2) { display: none; }
  .history-table th, .history-table td { padding: 6px 7px; font-size: var(--font-size-11); }
  .table-wrap { max-height: 240px; }

  .suggestion-box { padding: 8px 10px; }
  .sug-icon { display: none; }

  .cmp-range-row { grid-template-columns: 1fr; gap: 8px; }
  .cmp-summary-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 6px; }
  .cmp-kpi-vals { flex-direction: column; gap: 3px; }
  .cmp-chart-row { grid-template-columns: 1fr; gap: 8px; }
  .cmp-ex-table th:nth-child(5),
  .cmp-ex-table td:nth-child(5) { display: none; }
  .cmp-ex-table th, .cmp-ex-table td { padding: 6px 7px; font-size: var(--font-size-11); }
  .cmp-preset-row { gap: 4px; }
  .cmp-preset { font-size: var(--font-size-10); padding: 3px 10px; }

  .ses-list-panel { max-height: 280px; }
  .ses-list { max-height: 220px; }
  .ses-detail-panel { max-height: none; padding: 0.875rem; }
  .ses-meta-row { gap: 8px; }
  .ses-meta-chip { font-size: var(--font-size-12); padding: 6px 10px; }
  .ses-sets-table th:nth-child(5),
  .ses-sets-table td:nth-child(5),
  .ses-sets-table th:nth-child(6),
  .ses-sets-table td:nth-child(6) { display: none; }
  .ses-sets-table th, .ses-sets-table td { padding: 5px 7px; font-size: var(--font-size-11); }

  .next-workout-grid { grid-template-columns: 1fr; gap: 6px; }
  .next-ex-card { padding: 10px 12px; }

  #outlier-overlay { padding: 0; align-items: flex-end; }
  .outlier-modal {
    border-radius: var(--radius-panel) var(--radius-panel) 0 0;
    max-height: 88vh; overflow-y: auto;
    padding: 1rem 0.875rem; margin: 0;
  }
  .outlier-row {
    grid-template-columns: 75px 60px 40px 1fr;
    grid-template-rows: auto auto;
  }
  .outlier-row .outlier-toggle { grid-column: 4; grid-row: 1; justify-self: end; }
  .outlier-reason { grid-column: 1 / -1; grid-row: 2; }

  .heatmap-day { width: 10px; height: 10px; }
  .heatmap-day-label { height: 10px; font-size: var(--font-size-9); line-height: 10px; }

  .upload-logo { font-size: clamp(40px, 14vw, 72px); }
  .drop-zone { padding: 2rem 1.5rem; }
  .period-chips { gap: 5px; }
  .period-chip { padding: 5px 12px; font-size: var(--font-size-11); }

  .ex-sessions { font-size: var(--font-size-10); }
  .prog-badge { font-size: var(--font-size-9); padding: 2px 7px; }

  .btn-ghost,
  .btn-reset,
  .btn-compare,
  .btn-upload,
  .btn-plan,
  .btn-pdf,
  .btn-review-outliers,
  .btn-apply-outliers,
  .btn-ignore-all {
    min-height: 40px;
    padding-left: 14px;
    padding-right: 14px;
  }
}

@media (min-width: 641px) and (max-width: 900px) {
  .main { padding: 1rem; }
  .chart-wrap { height: 240px; }
  .ex-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .stats-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .detail-kpis { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .hm-stats-row { grid-template-columns: repeat(3, minmax(0,1fr)) !important; }
}

@media (max-width: 700px) { .ses-layout { grid-template-columns: 1fr; } }

@media (max-width: 600px) {
  .cmp-range-row { grid-template-columns: 1fr; }
  .cmp-chart-row { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .pr-table th:nth-child(4), .pr-table td:nth-child(4),
  .pr-table th:nth-child(5), .pr-table td:nth-child(5) { display: none; }
}

@media (max-width: 1100px) {
  .app-shell { grid-template-columns: 220px 1fr; }
  .topbar-search { min-width: 200px; }
}

@media (max-width: 1024px) {
  .stats-grid { gap: var(--space-4); }
  .two-col { grid-template-columns: 1fr; gap: var(--space-4); }
  .chart-card { padding: var(--space-4); }
  .heatmap-wrap { padding: var(--space-4); }
}

@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: auto;
    height: auto;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom));
    z-index: var(--z-modal);
    border-right: none;
    border-top: 1px solid var(--border);
  }
  .sidebar-top,
  .sidebar-footer { display: none; }
  .sidebar-nav { flex-direction: row; gap: var(--space-2); width: 100%; justify-content: space-between; }
  .nav-tab { padding: 10px 12px; justify-content: center; min-height: 44px; border-radius: var(--radius-md); }
  .nav-label { display: none; }
  .main { padding-bottom: calc(96px + env(safe-area-inset-bottom)); }
  .topbar { padding: var(--space-3) var(--space-4); }
  .topbar-search { display: none; }
  .topbar-right .btn-ghost,
  .topbar-right .btn-reset { display: none; }
  .user-chip { display: none; }
  .theme-switcher-label { display: none; }
  .sidebar,
  .topbar,
  .theme-switcher-panel {
    backdrop-filter: none;
  }
  #detail-overlay,
  #outlier-overlay {
    backdrop-filter: none;
  }
}