/* ══════════════════════════════════════════════════════════════════════════════
   CAM.TOOLS — MOBILE LAYER
   Drop-in mobile experience for every sidebar-app tool. Turns the desktop left
   sidebar into a bottom sheet and adds the DRUM_SCRUB relative-drag control.
   Everything here is gated on (max-width: 720px); desktop is untouched.
   Pairs with cam-tools-mobile.js. Styling is driven entirely from the existing
   cam-tools-ui.css design tokens.
   ══════════════════════════════════════════════════════════════════════════════ */

/* Mobile DOM is built on every load but stays hidden until the media query hits. */
#m-topbar,
#m-drum { display: none; }

@media (max-width: 720px) {

  html, body { overscroll-behavior: none; }

  /* ── Layout: topbar + canvas + sheet share the viewport as flex rows, so the
     sheet resizes the canvas instead of covering it ── */
  body.sidebar-app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
  }

  #canvas-area {
    position: relative;
    order: 2;
    flex: 1 1 auto;
    min-height: 0;
    z-index: 1;
  }

  /* Desktop logo/status row lives inside #sidebar; on mobile the logo moves
     into #m-topbar instead, so hide the original row entirely. */
  #sidebar .hp-top { display: none; }

  /* ── Top bar ── */
  #m-topbar {
    position: relative;
    order: 1;
    flex: 0 0 auto;
    z-index: 30;
    display: flex;
    align-items: center;
    gap: var(--sb-gap);
    height: calc(46px + env(safe-area-inset-top, 0px));
    padding: env(safe-area-inset-top, 0px) 10px 0;
    background: linear-gradient(var(--panel) 62%, transparent);
    border-bottom: 1px solid var(--sb-border-subtle);
  }
  #m-topbar .m-tb-title.m-tb-logo {
    font-family: 'DM Mono', monospace;
    letter-spacing: -0.03em;
    font-weight: 500;
    color: #078e00;
  }
  #m-topbar .m-tb-title.m-tb-logo .pixel {
    font-family: "pf-pixelscript", sans-serif;
    font-size: 13px;
  }
  #m-topbar .m-tb-back {
    display: flex; align-items: center; justify-content: center;
    width: 34px; height: 34px; flex-shrink: 0;
    color: var(--sb-text-mid); text-decoration: none;
    border: 1px solid var(--sb-line); border-radius: var(--sb-radius-sm);
    background: var(--sb-surface-2);
    font-size: 16px; line-height: 1;
  }
  #m-topbar .m-tb-title {
    flex: 1; min-width: 0;
    font-size: var(--sb-font-sm); font-weight: 300; color: var(--sb-text-mid);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  }
  #m-topbar .m-tb-btn {
    flex-shrink: 0;
    height: 34px; padding: 0 12px;
    display: flex; align-items: center;
    background: var(--sb-surface-2);
    border: 1px solid var(--sb-line);
    border-radius: var(--sb-radius-sm);
    color: var(--sb-text-mid);
    font-family: inherit; font-size: var(--sb-font-xs);
    white-space: nowrap;
  }
  #m-topbar .m-tb-btn.m-tb-primary {
    background: var(--sb-accent-bg);
    border-color: var(--sb-accent);
    color: var(--sb-accent);
  }
  #m-topbar .m-tb-chevron {
    flex-shrink: 0;
    width: 34px; height: 34px;
    display: flex; align-items: center; justify-content: center;
    background: var(--sb-surface-2);
    border: 1px solid var(--sb-line);
    border-radius: var(--sb-radius-sm);
    color: var(--sb-text-mid);
    font-size: 13px; line-height: 1;
    transition: transform 0.2s;
  }
  body.m-tools-hidden #m-topbar .m-tb-chevron { transform: rotate(180deg); }

  /* ── Bottom sheet (the repurposed #sidebar) ──
     Flex item (not an overlay): grows the canvas shrinks, and vice versa. */
  #sidebar {
    position: relative;
    order: 3;
    flex: 0 0 auto;
    left: auto; right: auto; bottom: auto; top: auto;
    width: auto;
    min-width: 0;
    height: auto;
    margin: 0;
    max-height: none;
    z-index: 20;
    border: none;
    border-top: 1px solid var(--sb-border);
    border-top-left-radius: 14px;
    border-top-right-radius: 14px;
    box-shadow: 0 -18px 40px rgba(0, 0, 0, 0.55);
    padding-bottom: env(safe-area-inset-bottom, 0px);
    overflow: hidden;
    transition: max-height 0.25s ease, opacity 0.2s ease, box-shadow 0.2s ease;
  }
  #sidebar, #m-drum, #m-drum * { touch-action: none; }
  .sb-body, .m-param-list { touch-action: pan-y; }

  /* Fully retracted: sidebar collapses to nothing, canvas takes the space */
  body.m-tools-hidden #sidebar {
    max-height: 0;
    border-top-color: transparent;
    box-shadow: none;
    pointer-events: none;
  }

  /* Drag handle — tap to expand/collapse the full control list */
  .m-drag-handle {
    display: flex;
    justify-content: center;
    padding-top: 10px;
    padding-bottom: 4px;
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
  }
  .m-drag-pill {
    width: 36px; height: 4px;
    border-radius: 2px;
    background: var(--sb-line-hover);
  }

  /* Collapsed: only the handle + drum peek above the fold, canvas keeps the rest */
  .sb-body { overscroll-behavior: contain; }
  .sb-body, .sb-footer { display: none; }
  body.m-sheet-open #sidebar { max-height: 62vh; max-height: 62dvh; }
  body.m-sheet-open .sb-body { display: block; flex: 1 1 auto; min-height: 0; }
  body.m-sheet-open .sb-footer { display: block; }

  /* ── Drum block: param list + drum card + secondary actions ── */
  #m-drum {
    display: block;
    flex-shrink: 0;
    padding: 6px 12px 12px;
    border-bottom: 1px solid var(--sb-border-subtle);
  }

  .m-param-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-height: 168px;
    overflow-y: auto;
    overscroll-behavior: contain;
    margin-bottom: 10px;
  }
  .m-param-row {
    display: flex; align-items: center; justify-content: space-between;
    gap: 10px;
    height: 40px; padding: 0 12px;
    border-radius: var(--sb-radius-sm);
    border: 1px solid transparent;
    color: var(--sb-text-lo);
    font-size: var(--sb-font-sm);
    -webkit-tap-highlight-color: transparent;
  }
  .m-param-row .m-pr-val {
    font-variant-numeric: tabular-nums;
    color: var(--sb-text-mid);
  }
  .m-param-row.sel {
    background: var(--sb-accent-bg);
    border-color: var(--sb-accent);
    color: var(--sb-accent);
  }
  .m-param-row.sel .m-pr-val { color: var(--sb-accent); }

  /* Drum card — the entire card is the drag surface */
  .m-drum-card {
    position: relative;
    height: 150px;
    background: var(--panel);
    border: 1px solid var(--sb-border-subtle);
    border-radius: var(--sb-radius-lg);
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
  }
  .m-drum-card:focus-visible { outline: 1px solid var(--sb-accent); outline-offset: -1px; }

  .m-drum-name {
    position: absolute; top: 14px; left: 0; right: 0;
    text-align: center;
    font-size: var(--sb-font-2xs);
    letter-spacing: 0.14em; text-transform: uppercase;
    color: var(--sb-text-lo);
  }
  .m-drum-value {
    position: absolute; top: 30px; left: 0; right: 0;
    text-align: center;
    font-size: 40px; line-height: 44px;
    font-variant-numeric: tabular-nums;
    color: var(--sb-text-hi);
  }
  .m-drum-hint {
    position: absolute; left: 12px; bottom: 60px;
    font-size: var(--sb-font-2xs);
    color: var(--sb-text-lo);
  }

  .m-ruler {
    position: absolute; left: 0; right: 0; bottom: 0;
    height: 56px;
    overflow: hidden;
    -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 56px, #000 calc(100% - 56px), transparent 100%);
            mask-image: linear-gradient(90deg, transparent 0, #000 56px, #000 calc(100% - 56px), transparent 100%);
  }
  .m-ruler-track {
    position: absolute;
    bottom: 0; left: 50%;
    width: 1440px; margin-left: -720px;
    height: 100%;
    background-image:
      repeating-linear-gradient(90deg, var(--sb-text-lo) 0 1px, transparent 1px 14.4px),
      repeating-linear-gradient(90deg, var(--sb-text-mid) 0 1.5px, transparent 1.5px 144px);
    background-position: bottom left, bottom left;
    background-size: 100% 22px, 100% 34px;
    background-repeat: repeat-x, repeat-x;
    opacity: 0.85;
  }
  .m-ruler-track.m-anim { transition: transform 0.18s ease-out; }
  .m-ruler-center {
    position: absolute; left: 50%; bottom: 0;
    width: 3px; height: 56px;
    margin-left: -1.5px;
    border-radius: 1px;
    background: var(--sb-accent);
  }

  .m-actions {
    display: flex;
    gap: 6px;
    margin-top: 10px;
  }
  .m-actions button {
    flex: 1;
    height: 44px;
    background: transparent;
    border: 1px solid var(--sb-line);
    border-radius: var(--sb-radius-sm);
    color: var(--sb-text-lo);
    font-family: inherit; font-size: var(--sb-font-xs);
    text-transform: lowercase; letter-spacing: 0.03em;
    -webkit-tap-highlight-color: transparent;
  }
  .m-actions button:active { color: var(--sb-text-hi); border-color: var(--sb-line-hover); }

  /* ── Roomier hit targets for the full control list in the expanded sheet ── */
  .sb-body .sb-section-header { padding-top: 12px; padding-bottom: 12px; }
  .sb-body .sb-ctrl { padding-top: 9px; padding-bottom: 9px; }
  .sb-body .sb-ctrl input[type=range] { max-width: none; height: 30px; }
  #sidebar .sb-body input[type=range]::-webkit-slider-thumb { width: 18px; height: 26px; }
  #sidebar .sb-body input[type=range]::-moz-range-thumb { width: 18px; height: 26px; }
  .sb-body .sb-toggle-btn { padding: 8px 12px; }
  .sb-body .sb-btn { padding: 8px 12px; }
  .sb-body .sb-check { padding-top: 10px; padding-bottom: 10px; }
  .sb-body .sb-upload { padding: 14px; }
  .sb-footer .sb-export-btn { padding: 14px; }
}