/* ─────────────────────────── design system ───────────────────────────
   "Drafting Studio" — warm dark surfaces, hairline rules, brass and
   blueprint accents. Distinctive Iowan/Palatino serif display with a
   geometric body sans and tabular monospace numerics. The visualization
   is a CAD-style graph board; everything else is paper-trim restraint.
*/

:root {
  /* Warm dark surfaces — espresso, not jet black */
  --bg:          #14110F;
  --surface:     #1B1815;
  --surface-2:  #221E1B;
  --rule:        #322C26;
  --rule-strong: #4A4138;

  --text:   #F2EDE2;
  --text-2: #A89F92;
  --text-3: #6B6358;
  --text-4: #46403A;

  /* Brass primary, blueprint secondary */
  --brass:        #E5A24A;
  --brass-dim:   #B58239;
  --blueprint:    #6F94B5;

  /* Category accent colors — used only for section headers and dividers. */
  --cat-reference: #D89A6A;
  --cat-photo:     #7AA0BE;
  --cat-canvas:    #B6B47E;

  /* Palette assigned to selected items. Up to 5 distinct hues, then cycle. */
  --c0: #E5A24A;  --c0-fill: rgba(229, 162,  74, 0.18);
  --c1: #6F94B5;  --c1-fill: rgba(111, 148, 181, 0.18);
  --c2: #D86A4F;  --c2-fill: rgba(216, 106,  79, 0.18);
  --c3: #A8B886;  --c3-fill: rgba(168, 184, 134, 0.18);
  --c4: #9C8FB8;  --c4-fill: rgba(156, 143, 184, 0.18);

  /* Mat is white, so the band reads as the picture's translucent border, not a
   * solid block. Frame is a solid warm walnut — high enough contrast against
   * the dark surface to read clearly as a picture frame. */
  --mat: rgba(244, 239, 228, 0.5);
  --frame:    #5C4630;

  /* Grid lines for the CAD viewport */
  --grid-minor: rgba(245, 235, 220, 0.035);
  --grid-major: rgba(245, 235, 220, 0.07);

  /* Type stacks — system-only, distinctive */
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "URW Palladio L", "Hoefler Text", serif;
  --sans:  -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", system-ui, sans-serif;
  --mono:  ui-monospace, "SF Mono", Menlo, "JetBrains Mono", Consolas, monospace;

  /* Layout */
  --col: min(100% - 1.5rem, 560px);
  --gutter: 1rem;
  --radius: 4px;
  --radius-lg: 8px;
}

@media (min-width: 760px) {
  :root { --col: min(100% - 3rem, 760px); }
}

@media (min-width: 1080px) {
  :root { --col: min(100% - 4rem, 1240px); }
}

/* ─────────────────────────── base ─────────────────────────── */

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 30% -10%, #1F1B17 0%, transparent 60%),
    radial-gradient(900px 500px at 90% 110%, #1A1714 0%, transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.45;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "ss02", "kern";
}

body {
  min-height: 100dvh;
  padding-top: max(var(--gutter), env(safe-area-inset-top));
  padding-bottom: max(var(--gutter), env(safe-area-inset-bottom));
  padding-left: max(var(--gutter), env(safe-area-inset-left));
  padding-right: max(var(--gutter), env(safe-area-inset-right));
}

main {
  width: var(--col);
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

h1, h2, h3, h4 { margin: 0; font-weight: 400; }

button {
  min-height: 44px;
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

::selection {
  background: var(--brass);
  color: var(--bg);
}

/* ─────────────────────────── header ─────────────────────────── */

.app-head {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-top: 0.5rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1.1rem;
  position: relative;
}

.app-head::after {
  /* second hairline rule for a "double-line" frontispiece feel */
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -4px;
  height: 1px;
  background: var(--rule);
}

.app-head h1 {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(2.1rem, 6vw, 3.1rem);
  letter-spacing: -0.015em;
  line-height: 1;
  color: var(--text);
}

.app-sub {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 500;
}

/* ─────────────────────────── tabs ─────────────────────────── */

.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--rule);
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }

.tab {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  padding: 0.65rem 0.35rem 0.85rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 500;
  text-align: center;
  transition: color 160ms ease;
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.3rem;
  white-space: nowrap;
}

.tab::before {
  content: attr(data-num);
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text-4);
  letter-spacing: 0;
  font-weight: 400;
  transition: color 160ms ease;
}

.tab::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--brass);
  transition: width 220ms cubic-bezier(0.2, 0.7, 0.2, 1),
              left 220ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.tab:hover { color: var(--text-2); }
.tab:hover::before { color: var(--text-3); }

.tab.is-active {
  color: var(--text);
}
.tab.is-active::before { color: var(--brass); }
.tab.is-active::after {
  left: 0;
  width: 100%;
}

/* ─────────────────────────── visualization ─────────────────────────── */

.viz {
  position: relative;
  background:
    linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 0;
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(255, 240, 220, 0.03) inset,
    0 30px 60px -30px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  aspect-ratio: 1 / 1;
  width: min(100%, 78vh);
  margin-inline: auto;
}

.compare {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

/* ─────────────────────────── custom-size modal ─────────────────────────── */

.custom-modal {
  border: none;
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--text);
  padding: 1.1rem 1.1rem 1.2rem;
  width: min(100% - 2rem, 380px);
  box-shadow:
    0 1px 0 rgba(255, 240, 220, 0.04) inset,
    0 30px 80px -20px rgba(0, 0, 0, 0.65);
}

.custom-modal::backdrop {
  background: rgba(8, 5, 3, 0.55);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.custom-modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.95rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--rule);
}

.custom-modal-head h2 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.2rem;
  letter-spacing: -0.005em;
  color: var(--text);
}

.custom-modal-close {
  flex: none;
  min-height: 0;
  width: 28px;
  height: 28px;
  border-radius: 14px;
  color: var(--text-3);
  font-size: 0.8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 140ms ease, background-color 140ms ease;
}
.custom-modal-close:hover {
  color: var(--text);
  background: rgba(245, 235, 220, 0.06);
}

.custom-form-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.custom-form-row input[type="number"],
.custom-form-row select {
  flex: 1 1 0;
  min-width: 0;
  height: 36px;
  padding: 0 0.55rem;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.85rem;
  appearance: textfield;
  -moz-appearance: textfield;
}

.custom-form-row input[type="number"]::-webkit-outer-spin-button,
.custom-form-row input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.custom-form-row select {
  flex: 0 0 4.5rem;
  appearance: none;
  -webkit-appearance: none;
  background:
    linear-gradient(45deg, transparent 50%, var(--text-3) 50%) calc(100% - 14px) 50% / 5px 5px no-repeat,
    var(--bg);
  padding-right: 1.4rem;
  cursor: pointer;
}

.custom-form-row input:focus,
.custom-form-row select:focus {
  outline: none;
  border-color: var(--brass);
}

.custom-form-x {
  font-family: var(--mono);
  color: var(--text-3);
  font-size: 0.85rem;
}

.custom-form-add {
  flex: 0 0 auto;
  min-height: 36px;
  height: 36px;
  padding: 0 0.9rem;
  border-radius: var(--radius);
  background: var(--brass);
  color: var(--bg);
  border: 1px solid var(--brass);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
  transition: background-color 140ms ease, transform 80ms ease;
}
.custom-form-add:hover { background: var(--brass-dim); border-color: var(--brass-dim); }
.custom-form-add:active { transform: scale(0.97); }

/* Remove button on user-added items */
.item-remove {
  flex: none;
  min-height: 22px;
  width: 22px;
  height: 22px;
  margin-left: 0.2rem;
  border-radius: 11px;
  background: transparent;
  color: var(--text-4);
  font-size: 0.7rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 120ms ease, background-color 120ms ease;
}
.item-remove:hover {
  color: var(--c2);
  background: rgba(216, 106, 79, 0.12);
}

/* Architectural callout in the top-left corner */
.viz::before {
  content: "DRAFTING BOARD · cm";
  position: absolute;
  top: 0.7rem;
  left: 0.85rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--text-4);
  z-index: 2;
  pointer-events: none;
}

/* Scale callout in the top-right corner */
.viz::after {
  content: "GRID 10 cm";
  position: absolute;
  top: 0.7rem;
  right: 0.85rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  color: var(--text-4);
  z-index: 2;
  pointer-events: none;
}

.viz-svg {
  width: 100%;
  height: 100%;
  display: block;
  padding: 2.1rem 1rem 1rem;
  flex: 1;
}

.shape-label {
  font-family: var(--mono);
  font-size: 3.6px;          /* viewBox units = cm. Tiny on mobile, fine on desktop. */
  fill: var(--text);
  pointer-events: none;
  font-weight: 500;
  letter-spacing: 0.03em;
  font-variant-numeric: tabular-nums;
  paint-order: stroke;
  stroke: var(--surface);
  stroke-width: 0.6;
  stroke-linejoin: round;
  opacity: 0.85;
}

/* Grid pattern lines (referenced from app.js-built defs) */
.grid-minor { stroke: var(--grid-minor); fill: none; vector-effect: non-scaling-stroke; stroke-width: 1; }
.grid-major { stroke: var(--grid-major); fill: none; vector-effect: non-scaling-stroke; stroke-width: 1; }

.shape {
  vector-effect: non-scaling-stroke;
  stroke-width: 1.5;
  transition: opacity 200ms ease;
  /* Neutral fallback if no palette slot is assigned. */
  fill: rgba(242, 237, 226, 0.05);
  stroke: var(--text-3);
}

/* Palette per assigned color slot. Stroke = border color, fill = same hue at
   low opacity, label inherits the stroke colour. */
.shape.color-0 { fill: var(--c0-fill); stroke: var(--c0); }
.shape.color-1 { fill: var(--c1-fill); stroke: var(--c1); }
.shape.color-2 { fill: var(--c2-fill); stroke: var(--c2); }
.shape.color-3 { fill: var(--c3-fill); stroke: var(--c3); }
.shape.color-4 { fill: var(--c4-fill); stroke: var(--c4); }

.shape-label.color-0 { fill: var(--c0); }
.shape-label.color-1 { fill: var(--c1); }
.shape-label.color-2 { fill: var(--c2); }
.shape-label.color-3 { fill: var(--c3); }
.shape-label.color-4 { fill: var(--c4); }

[data-drag-id] {
  cursor: grab;
  touch-action: none;
  transition: filter 140ms ease;
}

[data-drag-id]:hover {
  filter: brightness(1.15);
}

[data-drag-id].is-dragging {
  cursor: grabbing;
  filter: brightness(1.25) drop-shadow(0 4px 8px rgba(0, 0, 0, 0.4));
}

.shape-person {
  /* Background scale reference — dim, no stroke. Lets the actual sizes pop. */
  fill: rgba(242, 237, 226, 0.07);
  stroke: rgba(242, 237, 226, 0.12);
  stroke-width: 0.5;
  stroke-dasharray: 2 3;
  vector-effect: non-scaling-stroke;
}

.shape-frame {
  fill: var(--frame);
  stroke: none;
}
.shape-mat {
  fill: var(--mat);
  stroke: none;
}

/* ─────────────────────────── selection ─────────────────────────── */

.selection {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1rem 1.15rem;
}

.selection-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 0.9rem;
}

.selection-head h2 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.15rem;
  letter-spacing: -0.005em;
  color: var(--text);
}

.selection-count {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--text-3);
  text-transform: uppercase;
}

.cat-block + .cat-block { margin-top: 1.1rem; }

.cat-head {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.4rem;
  padding-left: 0.1rem;
}

.cat-name {
  font-family: var(--sans);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 600;
}

.cat-rule {
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.cat-add {
  flex: none;
  min-height: 0;
  width: 22px;
  height: 22px;
  border-radius: 11px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--text-3);
  font-size: 0.85rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 140ms ease, border-color 140ms ease, background-color 140ms ease;
}
.cat-add[hidden] { display: none; }
.cat-add:hover {
  color: var(--brass);
  border-color: var(--brass);
  background: rgba(229, 162, 74, 0.06);
}

.cat-name.cat-photo { color: var(--cat-photo); }
.cat-name.cat-canvas { color: var(--cat-canvas); }
.cat-name.cat-reference { color: var(--cat-reference); }
.cat-name.cat-custom { color: var(--brass); }

.cat-list, .bucket-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.cat-list > li + li {
  border-top: 1px solid transparent;
}

.item {
  display: grid;
  grid-template-columns: 18px 10px 1fr auto;
  align-items: center;
  gap: 0.55rem 0.65rem;
  padding: 0.5rem 0.55rem;
  border-radius: var(--radius);
  cursor: pointer;
  min-height: 44px;
  transition: background-color 140ms ease, color 140ms ease;
}

.item:hover { background: rgba(245, 235, 220, 0.025); }
.item.is-selected {
  background: rgba(229, 162, 74, 0.08);
}

.item input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 1px solid var(--text-4);
  border-radius: 2px;
  background: transparent;
  display: grid;
  place-content: center;
  cursor: pointer;
  margin: 0;
  flex: none;
  transition: border-color 140ms ease, background-color 140ms ease;
}

.item input[type="checkbox"]:checked {
  background: var(--brass);
  border-color: var(--brass);
}

.item input[type="checkbox"]:checked::after {
  content: "";
  width: 9px;
  height: 5px;
  border-left: 1.5px solid var(--bg);
  border-bottom: 1.5px solid var(--bg);
  transform: translateY(-1.5px) rotate(-45deg);
}

.item-swatch {
  width: 8px;
  height: 18px;
  border-radius: 1px;
  flex: none;
  background: transparent;
  border: 1px dashed var(--text-4);
  transition: background-color 140ms ease, border-color 140ms ease;
}
.item-swatch.color-0 { background: var(--c0); border: 1px solid var(--c0); }
.item-swatch.color-1 { background: var(--c1); border: 1px solid var(--c1); }
.item-swatch.color-2 { background: var(--c2); border: 1px solid var(--c2); }
.item-swatch.color-3 { background: var(--c3); border: 1px solid var(--c3); }
.item-swatch.color-4 { background: var(--c4); border: 1px solid var(--c4); }

.item-main {
  min-width: 0;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
}

.item-name {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.01em;
  color: var(--text);
}

.item.is-selected .item-name { color: var(--text); }

.item-alt {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-4);
}

.item-aspect {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-3);
  font-feature-settings: "tnum" 1;
  font-variant-numeric: tabular-nums;
  min-width: 2.6em;
  text-align: right;
}

.item.is-selected .item-aspect { color: var(--brass); }

/* ─────────────────────────── decoration controls ─────────────────────────── */

.item-decorations { display: none; }

.item-decorations:not(:empty) {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.55rem 0.55rem 0.7rem;
  margin: 0.1rem 0 0.45rem 1.45rem;
  border-left: 1px dashed var(--rule);
}

.decoration-row {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  align-items: center;
  gap: 0.65rem;
}

.decoration-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}

.decoration-controls {
  display: flex;
  align-items: stretch;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.decoration-preset {
  min-height: 28px;
  min-width: 28px;
  padding: 0 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--text-2);
  font-family: var(--mono);
  font-size: 0.74rem;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}
.decoration-preset:hover { color: var(--text); border-color: var(--rule-strong); }
.decoration-preset.is-active {
  background: var(--brass);
  color: var(--bg);
  border-color: var(--brass);
}

.decoration-input {
  flex: 1 1 0;
  min-width: 3.2rem;
  max-width: 5rem;
  height: 28px;
  padding: 0 0.45rem;
  border-radius: 4px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.74rem;
  appearance: textfield;
  -moz-appearance: textfield;
}
.decoration-input::-webkit-outer-spin-button,
.decoration-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.decoration-input:focus {
  outline: none;
  border-color: var(--brass);
}

/* ─────────────────────────── section heads & grouped ─────────────────────────── */

.grouped-section {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1rem 1.15rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 0.9rem;
}

.section-head h2 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.15rem;
  letter-spacing: -0.005em;
  color: var(--text);
}

.section-hint {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--text-3);
  text-transform: uppercase;
  text-align: right;
}

.grouped {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
}

.bucket {
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}
.bucket:last-child { border-bottom: 0; }

.bucket-head {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding-top: 0.1rem;
}

.bucket-label {
  font-family: var(--serif);
  font-style: italic;
  font-size: 2.4rem;
  line-height: 1;
  color: var(--brass);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.bucket-hint {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-4);
}

.bucket-body {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding-top: 0.35rem;
}

.bucket-cat-name {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 600;
  margin-bottom: 0.2rem;
}
.bucket-cat-name.cat-photo  { color: var(--cat-photo); }
.bucket-cat-name.cat-canvas { color: var(--cat-canvas); }

.bucket-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.1rem 0;
  font-family: var(--mono);
}

.bucket-item .item-name { font-size: 0.84rem; }
.bucket-item .item-alt  { font-size: 0.7rem; }

/* ─────────────────────────── desktop layout ─────────────────────────── */

@media (min-width: 920px) {
  main {
    display: grid;
    grid-template-columns: 340px 1fr;
    grid-template-areas:
      "head      head"
      "selection compare"
      "selection grouped";
    gap: 1.5rem 2.25rem;
    align-items: start;
  }

  .app-head      { grid-area: head; }
  .compare       { grid-area: compare; }
  .grouped-section { grid-area: grouped; }
  .selection {
    grid-area: selection;
    position: sticky;
    top: 1rem;
    max-height: calc(100dvh - 2rem);
    overflow-y: auto;
  }

  /* Larger header type on desktop */
  .app-head h1 { font-size: clamp(2.6rem, 4vw, 3.5rem); }

  /* Tabs become wider, less compressed */
  .tab {
    flex: 0 0 auto;
    padding: 0.75rem 1.4rem 1rem;
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    gap: 0.45rem;
  }
}

@media (min-width: 1280px) {
  main {
    grid-template-columns: 380px 1fr;
  }
}

/* Entrance animations were intentionally removed: every render replaces the
   shell, so any keyframe on .viz-svg / .app-head retriggered on each state
   change and made mode-switches flicker. */