/* controls.css - the shared controls every screen composes, drawn once:
   underline tabs (F62), the two- and three-way sliding switch (F51), the
   urgent and overdue marks and the red items they make (F61 to F61d), the
   delete confirmation's marks on its item (F74), a pick list's divider
   (5.4b), the thin scroll bar with its fade (200), and the signing
   window's place and Justification (191, 5.4 to 5.4c). */

@layer components {
  /* ---- underline tabs: plain words on the divider line, the open one
     dark over a 2 px navy underline, one not open yet paler (F62) ---- */
  .tabs-line {
    display: flex;
    align-items: flex-end;
    gap: var(--space-4);
    border-bottom: var(--hairline) solid var(--line);
  }
  .tabs-line-tab {
    --tab-ink: var(--ink-soft);
    --tab-under: transparent;
    padding: var(--tab-pad-top) 0 var(--tab-pad-bottom);
    margin-bottom: calc(-1 * var(--hairline));
    border: 0;
    border-bottom: var(--tab-underline) solid var(--tab-under);
    background: transparent;
    color: var(--tab-ink);
    font: inherit;
    font-size: var(--text-md);
    white-space: nowrap;
    cursor: pointer;
  }
  .tabs-line-tab:hover { --tab-ink: var(--ink); }
  .tabs-line-tab[aria-selected="true"] { --tab-ink: var(--accent-deep); --tab-under: var(--accent); }
  .tabs-line-tab[data-later="true"], .tabs-line-tab[data-later="true"]:hover { --tab-ink: var(--ink-pale); cursor: default; }
  .tabs-line-tab:focus-visible { outline: var(--focus-ring); outline-offset: var(--focus-ring-offset); }

  /* ---- sliding switch: a pale track, a white knob sliding to the open
     part, 86 px a part (F51; 178 px for two, 264 px for three) ---- */
  .slide-switch {
    --parts: 2;
    --knob-at: 0;
    position: relative;
    display: inline-grid;
    grid-template-columns: repeat(var(--parts), var(--view-switch-half));
    padding: var(--view-switch-pad);
    border-radius: var(--radius-pill);
    background: var(--view-switch-track);
  }
  .slide-switch[data-parts="3"] { --parts: 3; }
  .slide-switch[data-state="second"] { --knob-at: 1; }
  .slide-switch[data-state="third"] { --knob-at: 2; }
  .slide-switch::before {
    content: "";
    position: absolute;
    top: var(--view-switch-pad);
    bottom: var(--view-switch-pad);
    left: var(--view-switch-pad);
    width: var(--view-switch-half);
    border: var(--hairline) solid var(--line);
    border-radius: var(--radius-pill);
    background: var(--panel);
    transform: translateX(calc(var(--knob-at) * 100%));
    transition: transform var(--motion-slide);
  }
  .slide-switch-part {
    position: relative;
    padding: var(--space-3) 0;
    border: 0;
    background: transparent;
    color: var(--ink-soft);
    font: inherit;
    font-size: var(--text-md);
    font-weight: var(--weight-regular);
    cursor: pointer;
  }
  .slide-switch-part[aria-checked="true"] { color: var(--accent); font-weight: var(--weight-medium); cursor: default; }
  .slide-switch-part:focus-visible { outline: var(--focus-ring); outline-offset: 0; border-radius: var(--radius-pill); }

  /* ---- urgent and overdue: the item pale red with a red edge; two red
     items next to each other share one red line (120, 128, 236) ---- */
  .red-item[data-red="true"] {
    position: relative;
    z-index: 1;
    background: var(--danger-ground);
    border-color: var(--alarm);
  }
  .red-item[data-red="true"] + .red-item[data-red="true"] { margin-top: calc(-1 * var(--hairline)); }
  .item-marks {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-left: auto;
    flex: 0 0 auto;
  }
  .item-mark {
    display: block;
    width: var(--icon-size);
    height: var(--icon-size);
    color: var(--alarm);
  }
  .item-mark .icon svg { stroke-width: var(--mark-stroke); }
  .item-mark-urgent {
    display: flex;
    align-items: center;
    justify-content: center;
    border: var(--urgent-ring) solid var(--alarm);
    border-radius: var(--radius-round);
    font-size: var(--text-tag);
    font-weight: var(--weight-strong);
    line-height: 1;
  }

  /* ---- what a confirmation asks about: red behind, or a proposal's thin
     red outline, never all red (201, 223) ---- */
  [data-confirm="red"] { background: var(--danger-soft); }
  [data-confirm="outline"] { outline: var(--hairline) solid var(--alarm); }

  /* ---- a pick list's divider above Other (177) ---- */
  .menu[data-kind="picker"] [data-menu-item="other"] { --menu-item-ink: var(--accent); }
  .menu-divider {
    height: var(--hairline);
    margin: var(--space-2) var(--space-3);
    border: 0;
    background: var(--line);
  }

  /* ---- an inner scroll area: the thin bar at its right, and a soft fade
     only where more is hidden (200); the fade masks the area itself, so a
     frame around it goes on its parent ---- */
  .scroll-area {
    --fade-top: var(--scroll-fade);
    --fade-foot: var(--scroll-fade);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--scroll-thumb) transparent;
  }
  .scroll-area::-webkit-scrollbar { width: var(--scroll-bar); }
  .scroll-area::-webkit-scrollbar-thumb { background: var(--scroll-thumb); border-radius: var(--radius-pill); }
  .scroll-area[data-fade="start"] {
    mask-image: linear-gradient(to bottom, var(--panel) calc(100% - var(--fade-foot)), transparent);
  }
  .scroll-area[data-fade="end"] {
    mask-image: linear-gradient(to top, var(--panel) calc(100% - var(--fade-top)), transparent);
  }
  .scroll-area[data-fade="middle"] {
    mask-image: linear-gradient(to bottom, transparent, var(--panel) var(--fade-top),
      var(--panel) calc(100% - var(--fade-foot)), transparent);
  }

  /* ---- the signing window: centred in the page, 120 px from its top
     (191); one Justification, Other's box under its picker (5.4c) ---- */
  .sign-window {
    width: min(var(--sign-window-width), calc(100vw - var(--space-11)));
    margin-top: var(--sign-window-top);
    border-radius: var(--radius-window);
  }
  .sign-field { gap: var(--space-2); }
  .sign-picker { width: 100%; }
  .sign-picker[hidden], .sign-justification[hidden] { display: none; }
  .sign-window[data-choice="other"][data-picker="shown"] .sign-justification { margin-top: var(--space-3); }
  /* a day in a signing window (4.98c, 5.19): the picker shows it, the
     browser's calendar drops from a date input kept out of sight */
  .date-field { position: relative; }
  .date-field[data-width="narrow"] .picker { width: var(--date-field-width); }
  .date-field-input {
    position: absolute;
    width: var(--signal-date-size);
    height: var(--signal-date-size);
    opacity: 0;
    pointer-events: none;
  }
}