/* ============================================================================
   wivo.my — application shell
   The rail, the title bar, the ribbon, the panels and the status bar. Every
   edge in here is a hairline; every panel is a wireframe object.
   ========================================================================= */

#app {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

/* ══ The mode rail — W I V O ═════════════════════════════════════════════ */
.rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) 0 var(--space-3);
  border-right: 1px solid var(--color-divider);
  background: var(--color-surface);
  position: relative;
  z-index: 40;
}

.rail-mark {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  margin-bottom: var(--space-3);
  border: 1px solid var(--color-accent);
  color: var(--color-accent-800);
  background: var(--color-accent-100);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .02em;
  cursor: pointer;
  flex: none;
}
.rail-mark:hover { background: var(--color-accent); color: var(--ink-inverse); }

.rail-modes { display: flex; flex-direction: column; gap: 2px; width: 100%; align-items: center; }

.mode-btn {
  position: relative;
  width: 56px;
  padding: var(--space-2) 0 5px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  border: 1px solid transparent;
  color: var(--ink-3);
  transition: color .14s ease, background-color .14s ease, border-color .14s ease;
}
.mode-btn .glyph {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 21px;
  line-height: 1;
  letter-spacing: .02em;
}
.mode-btn .name {
  font-family: var(--font-semi);
  font-size: 8px;
  letter-spacing: .07em;
  text-transform: uppercase;
  opacity: .9;
}
.mode-btn:hover { color: var(--ink-1); background: var(--wash-2); }
.mode-btn[aria-current="true"] {
  color: var(--color-accent-800);
  background: var(--color-accent-100);
  border-color: var(--color-divider);
}
.mode-btn[aria-current="true"]::before {
  content: "";
  position: absolute;
  left: -1px; top: -1px; bottom: -1px;
  width: 2px;
  background: var(--color-accent);
}

.rail-foot { margin-top: auto; display: flex; flex-direction: column; gap: 2px; align-items: center; }
.rail-foot .ib { width: 32px; height: 30px; color: var(--ink-3); }
.rail-foot .ib:hover { color: var(--ink-1); }

/* ══ Title bar ═══════════════════════════════════════════════════════════ */
.frame { display: flex; flex-direction: column; min-width: 0; min-height: 0; }

.titlebar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: var(--titlebar-h);
  flex: none;
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-bg);
  position: relative;
  z-index: 30;
}

.doc-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: .005em;
  color: var(--ink-1);
  background: transparent;
  border: 1px solid transparent;
  padding: 2px 7px;
  min-width: 8ch;
  max-width: 42ch;
  border-radius: 0;
}
.doc-title:hover { border-color: var(--color-divider-soft); }
.doc-title:focus { border-color: var(--color-accent); background: var(--color-surface-2); outline: none; }

.mode-label {
  font-family: var(--font-semi);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--color-accent-700);
  padding-right: var(--space-2);
  border-right: 1px solid var(--color-divider);
  margin-right: var(--space-1);
}

.save-state {
  font-family: var(--font-semi);
  font-size: 10.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.save-state .dot { width: 5px; height: 5px; background: var(--ink-4); flex: none; }
.save-state[data-state="dirty"] .dot { background: var(--status-warning); }
.save-state[data-state="saved"] .dot { background: var(--status-good); }

.omni {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 27px;
  min-width: 220px;
  padding: 0 9px;
  border: 1px solid var(--color-divider);
  background: var(--color-surface-2);
  color: var(--ink-3);
  font-size: 12.5px;
  cursor: pointer;
  transition: border-color .12s ease;
}
.omni:hover { border-color: var(--color-accent); color: var(--ink-2); }
.omni kbd {
  margin-left: auto;
  font-family: var(--font-semi);
  font-size: 10px;
  letter-spacing: .08em;
  border: 1px solid var(--color-divider);
  padding: 0 5px;
  color: var(--ink-3);
}

.avatars { display: flex; align-items: center; }
.avatar {
  width: 24px; height: 24px;
  display: grid; place-items: center;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 10.5px;
  letter-spacing: .04em;
  border: 1px solid var(--color-bg);
  color: var(--ink-inverse);
}
.avatar + .avatar { margin-left: -7px; }

/* ══ Mode body ═══════════════════════════════════════════════════════════ */
.mode-body { position: relative; min-height: 0; min-width: 0; flex: 1 1 auto; }
.ws { position: absolute; inset: 0; display: none; flex-direction: column; min-width: 0; min-height: 0; }
.ws.is-active { display: flex; }

/* ══ Ribbon ══════════════════════════════════════════════════════════════ */
.ribbon { flex: none; background: var(--color-bg); border-bottom: 1px solid var(--color-divider); }

.ribbon-tabs {
  display: flex;
  align-items: stretch;
  gap: 0;
  padding: 0 var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}
.rtab {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 12.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 7px 13px 6px;
  color: var(--ink-2);
  border-bottom: 2px solid transparent;
  transition: color .12s ease, border-color .12s ease, background-color .12s ease;
}
.rtab:hover { color: var(--ink-1); background: var(--wash-1); }
.rtab[aria-selected="true"] { color: var(--color-accent-800); border-bottom-color: var(--color-accent); }

.ribbon-strip {
  display: flex;
  align-items: stretch;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  min-height: var(--ribbon-h);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
}
.ribbon-strip::-webkit-scrollbar { height: 6px; }
.ribbon-strip::-webkit-scrollbar-thumb { background: var(--wash-3); }

.rgroup {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 6px;
  padding-right: var(--space-3);
  border-right: 1px solid var(--color-divider);
  flex: none;
}
.rgroup:last-child { border-right: 0; }
.rgroup-row { display: flex; align-items: center; gap: 2px; }
.rgroup-label {
  font-family: var(--font-semi);
  font-size: 9px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-4);
  text-align: center;
}

.ib-wide { padding: 0 9px; gap: 6px; font-size: 12px; font-family: var(--font-semi); letter-spacing: .02em; }
.ib-tall {
  flex-direction: column;
  width: 52px; height: 100%;
  min-height: 52px;
  gap: 4px;
  font-size: 10px;
  font-family: var(--font-semi);
  letter-spacing: .06em;
  display: inline-flex; align-items: center; justify-content: center;
}

.swatch-btn { position: relative; }
.swatch-btn .bar {
  position: absolute;
  left: 5px; right: 5px; bottom: 3px;
  height: 3px;
}

/* ══ Document canvas ═════════════════════════════════════════════════════ */
.write-body { display: grid; grid-template-columns: minmax(0, 1fr); min-height: 0; flex: 1 1 auto; }
.write-body.has-panel { grid-template-columns: minmax(0, 1fr) var(--panel-w); }
.write-body.has-left { grid-template-columns: 216px minmax(0, 1fr); }
.write-body.has-left.has-panel { grid-template-columns: 216px minmax(0, 1fr) var(--panel-w); }

.canvas {
  position: relative;
  overflow: auto;
  background: var(--color-surface);
  background-image:
    linear-gradient(var(--color-divider-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-divider-soft) 1px, transparent 1px);
  background-size: 34px 34px;
  padding: var(--space-8) var(--space-6) var(--space-12);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}
:root[data-grid="off"] .canvas { background-image: none; }

.ruler {
  position: sticky;
  top: calc(var(--space-8) * -1);
  z-index: 6;
  align-self: center;
  height: 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  flex: none;
}
.ruler .tick { width: 1px; background: var(--ink-4); flex: none; }
.ruler .tick.major { height: 9px; }
.ruler .tick.minor { height: 4px; }
.ruler .gapfill { flex: 1 1 auto; }
.ruler .margin-zone { background: var(--wash-2); align-self: stretch; }

/* The paper */
.paper {
  position: relative;
  background: var(--color-paper);
  border: 1px solid var(--color-divider);
  box-shadow: var(--shadow-paper);
  flex: none;
  transform-origin: top center;
  transition: width .18s ease;
}
.paper-inner {
  min-height: 100%;
  outline: none;
  font-size: 15px;
  line-height: 1.68;
  color: var(--ink-1);
  caret-color: var(--color-accent);
}
.page-edge {
  position: absolute;
  left: 0; right: 0;
  border-top: 1px dashed var(--color-divider);
  pointer-events: none;
  z-index: 2;
}
.page-edge::after {
  content: attr(data-label);
  position: absolute;
  right: 6px; top: 4px;
  font-family: var(--font-semi);
  font-size: 9px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-4);
}

/* Focus mode dims everything but the active block */
:root[data-focus="on"] .paper-inner > * { opacity: .28; transition: opacity .25s ease; }
:root[data-focus="on"] .paper-inner > .is-focus-block { opacity: 1; }
:root[data-focus="on"] .ribbon { opacity: .35; transition: opacity .25s ease; }
:root[data-focus="on"] .ribbon:hover { opacity: 1; }

/* ══ Side panels ═════════════════════════════════════════════════════════ */
.panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-left: 1px solid var(--color-divider);
  background: var(--color-bg);
}
.panel-left { border-left: 0; border-right: 1px solid var(--color-divider); }

.panel-head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  flex: none;
}
.panel-head h3 {
  font-family: var(--font-semi);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0;
}
.panel-body { overflow: auto; padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-5); min-height: 0; }
.panel-section { display: flex; flex-direction: column; gap: var(--space-2); }
.panel-section > .kicker { margin-bottom: 2px; }

/* Outline tree */
.outline-item {
  display: flex;
  align-items: baseline;
  gap: 7px;
  width: 100%;
  text-align: left;
  padding: 4px 8px;
  font-size: 13px;
  color: var(--ink-2);
  border-left: 2px solid transparent;
  transition: background-color .1s ease, color .1s ease;
}
.outline-item:hover { background: var(--wash-2); color: var(--ink-1); }
.outline-item.is-current { background: var(--color-accent-100); color: var(--color-accent-800); border-left-color: var(--color-accent); }
.outline-item .lv { font-family: var(--font-semi); font-size: 9px; letter-spacing: .1em; color: var(--ink-4); flex: none; width: 16px; }
.outline-item[data-level="1"] { font-family: var(--font-heading); font-size: 14px; font-weight: 600; }
.outline-item[data-level="2"] { padding-left: 16px; }
.outline-item[data-level="3"] { padding-left: 28px; font-size: 12px; }

/* Page thumbnails */
.thumbs { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); }
.thumb {
  aspect-ratio: 8.5 / 11;
  background: var(--color-paper);
  border: 1px solid var(--color-divider);
  position: relative;
  padding: 7px 6px;
  display: flex; flex-direction: column; gap: 3px;
  cursor: pointer;
  overflow: hidden;
}
.thumb.is-current { border-color: var(--color-accent); box-shadow: 0 0 0 1px var(--color-accent); }
.thumb .ln { height: 2px; background: var(--wash-3); }
.thumb .ln.h { height: 4px; background: var(--color-accent-400); width: 62%; }
.thumb .no {
  position: absolute; right: 3px; bottom: 2px;
  font-family: var(--font-semi); font-size: 8px; color: var(--ink-4);
}

/* ══ Status bar ══════════════════════════════════════════════════════════ */
.statusbar {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  height: var(--statusbar-h);
  flex: none;
  padding: 0 var(--space-4);
  border-top: 1px solid var(--color-divider);
  background: var(--color-bg);
  font-family: var(--font-semi);
  font-size: 10.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
  white-space: nowrap;
  overflow: hidden;
}
.statusbar b { font-weight: 600; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.statusbar .sb-item { display: inline-flex; align-items: center; gap: 5px; }
.statusbar button.sb-item { transition: color .1s ease; }
.statusbar button.sb-item:hover { color: var(--color-accent-700); }

.zoomer { display: inline-flex; align-items: center; gap: 5px; }
.zoomer input[type="range"] {
  width: 84px; height: 14px;
  appearance: none; background: transparent; cursor: pointer;
}
.zoomer input[type="range"]::-webkit-slider-runnable-track { height: 1px; background: var(--color-divider); }
.zoomer input[type="range"]::-webkit-slider-thumb {
  appearance: none; width: 9px; height: 11px; margin-top: -5px;
  background: var(--color-accent); border: 0;
}
.zoomer input[type="range"]::-moz-range-track { height: 1px; background: var(--color-divider); }
.zoomer input[type="range"]::-moz-range-thumb { width: 9px; height: 11px; background: var(--color-accent); border: 0; border-radius: 0; }

/* ══ Update banner ═══════════════════════════════════════════════════════
   Shown when a push has landed and the page is running the previous build.
   It sits above everything and does not dismiss itself: a reader who is
   mid-sentence should refresh when they choose to, not be interrupted. */
.update-bar {
  position: fixed;
  left: 50%;
  bottom: calc(var(--statusbar-h) + var(--space-4));
  transform: translateX(-50%) translateY(10px);
  z-index: 520;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-3) var(--space-3) var(--space-5);
  background: var(--color-accent-900);
  color: #f2f2f3;
  border-left: 3px solid var(--color-accent-400);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
  max-width: min(560px, calc(100vw - var(--space-8)));
}
.update-bar.is-open { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto; }
.update-bar .txt { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.update-bar .txt b {
  font-family: var(--font-heading); font-weight: 600; font-size: 15.5px;
}
.update-bar .txt span {
  font-size: 12.5px;
  color: color-mix(in srgb, #f2f2f3 72%, transparent);
}
.update-bar .btn {
  background: #f2f2f3; border-color: #f2f2f3; color: var(--color-accent-900);
  flex: none;
}
.update-bar .btn:hover { background: #fff; border-color: #fff; }
.update-bar .later {
  background: transparent; border: 0; color: color-mix(in srgb, #f2f2f3 60%, transparent);
  font-family: var(--font-semi); font-size: 11px; letter-spacing: .08em;
  text-transform: uppercase; cursor: pointer; padding: 4px 6px; flex: none;
}
.update-bar .later:hover { color: #f2f2f3; }

/* The version, wherever it is shown */
.version-tag {
  font-family: var(--font-semi);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--ink-4);
  font-variant-numeric: tabular-nums;
}
button.version-tag { cursor: pointer; }
button.version-tag:hover { color: var(--color-accent-700); }