.windrose-page {
  --bg: var(--background, #1d1e28);
  --bg-2: color-mix(in srgb, var(--accent) 6%, #16171f 94%);
  --surface: color-mix(in srgb, var(--accent) 8%, #252636 92%);
  --surface-2: color-mix(in srgb, var(--accent) 10%, #2d2f42 90%);
  --ink: var(--color, #f4f7f6);
  --ink-dim: #b1c9c3;
  --border: var(--border-color, rgba(119, 191, 207, 0.28));
  --border-2: color-mix(in srgb, var(--accent) 55%, transparent);
  --accent-ink: var(--accent-contrast-color, #041018);
  --danger: #d74200;
  --ring: #cfc041;
  --chip-ink: #0f3b3a;
  --scrim: rgba(15, 59, 58, 0.72);
  --term-n: #00c420;
  --term-e: #e99f10;
  --term-w: #0096ff;
  --term-s: #da5bd6;
  --nt-0: #77bfcf;
  --nt-1: #cfc041;
  --nt-2: #b154cf;
  --nt-3: #f15f22;
  --nt-4: #00c420;
  --nt-5: #da5bd6;
  --nt-6: #23b0ff;
  --nt-7: #e99f10;
  --status: #0f3b3a;
  --radius: 0;
  --chip: 2rem;
  --pad: 1rem;
  --font: "Fira Code", Monaco, Consolas, "Ubuntu Mono", monospace;
  --mono: "Fira Code", Monaco, Consolas, "Ubuntu Mono", monospace;
  color-scheme: dark;
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

body:has(.windrose-page) {
  overflow: hidden;
}

body:has(.windrose-page) .container {
  max-width: none;
  padding: 16px 20px 0;
  min-height: 100dvh;
  height: 100dvh;
}

body:has(.windrose-page) .content {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

body:has(.windrose-page) .navigation-menu {
  margin: 8px 1px 12px;
}

body:has(.windrose-page) .header {
  flex: none;
}

body:has(.windrose-page) .footer {
  display: none;
}

[hidden] {
  display: none !important;
}

.windrose-page button,
.windrose-page input {
  font: inherit;
  letter-spacing: inherit;
  color: inherit;
}

.windrose-page button {
  border-radius: var(--radius);
}

.windrose-page h1,
.windrose-page h2,
.windrose-page h3,
.windrose-page h4,
.windrose-page p {
  margin: 0;
}

.windrose-app {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
  overscroll-behavior: none;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  letter-spacing: -0.01em;
  line-height: 1.4;
  border: 1px solid var(--border);
}

.topbar {
  display: flex;
  align-items: stretch;
  gap: 0.75rem;
  min-height: 3.25rem;
  padding: 0.5rem var(--pad);
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  min-width: 0;
}

.brand-back {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  align-self: center;
  white-space: nowrap;
}

.brand-back:hover,
.brand-back:focus-visible {
  text-decoration: underline;
}

.brand-mark {
  width: 0.7rem;
  height: 0.7rem;
  background: var(--accent);
  flex: none;
  align-self: center;
}

.brand h1 {
  font-size: 1rem;
  font-weight: 650;
}

.brand-sub {
  color: var(--ink-dim);
  font-size: 0.78rem;
}

.tabs {
  display: none;
  flex: 1;
  min-width: 0;
}

.tab,
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  padding: 0.4rem 0.7rem;
  min-height: 2rem;
  cursor: pointer;
  touch-action: manipulation;
}

.tab {
  flex: 1;
}

.tab[aria-selected="true"],
.btn.toggle[aria-pressed="true"],
.btn-accent {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-block {
  width: 100%;
  margin-top: 0.75rem;
}

.btn-danger {
  color: var(--danger);
  border-color: var(--border-2);
}

.top-actions {
  display: flex;
  gap: 0.35rem;
  margin-left: auto;
}

.panes {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(280px, 42%) 1fr;
}

.pane {
  min-height: 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.pane-grammar {
  border-right: 1px solid var(--border);
}

.pane-scroll {
  overflow: auto;
  padding: var(--pad);
  overscroll-behavior: contain;
}

.pane-derive {
  overflow: hidden;
}

body[data-pane="grammar"] .pane-grammar,
body[data-pane="derive"] .pane-derive {
  /* desktop: both visible; mobile override below */
}

.row-block {
  margin-bottom: 0.9rem;
}

.label {
  display: block;
  color: var(--ink-dim);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.chip,
.sym,
.eps {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--chip);
  min-height: var(--chip);
  padding: 0 0.45rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  border-radius: var(--radius);
}

.chip.start-on {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.sym[data-kind="term"],
.sym[data-kind="nt"] {
  color: var(--chip-ink);
  font-weight: 700;
  border-color: transparent;
}

.sym[data-kind="term"][data-value="N"] {
  background: var(--term-n);
}
.sym[data-kind="term"][data-value="E"] {
  background: var(--term-e);
}
.sym[data-kind="term"][data-value="W"] {
  background: var(--term-w);
  color: #041018;
}
.sym[data-kind="term"][data-value="S"] {
  background: var(--term-s);
  color: #1d1e28;
}

.eps {
  color: var(--ink-dim);
  font-style: italic;
  cursor: pointer;
}

.banner {
  margin: 0 0 0.75rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--danger);
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 10%, var(--surface));
  font-size: 0.85rem;
}

.banner-inline {
  margin: 0;
  flex: 1;
  min-width: 8rem;
}

.card {
  border: 1px solid var(--border);
  background: var(--surface);
  margin-bottom: 0.65rem;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.nt-name {
  width: 5.5rem;
  min-height: var(--chip);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 0 0.4rem;
  font-weight: 650;
}

.nt-name:focus {
  outline: 2px solid var(--ring);
  outline-offset: -2px;
}

.card-head .spacer {
  flex: 1;
}

.prod {
  display: flex;
  align-items: flex-start;
  gap: 0.35rem;
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

.prod:last-of-type {
  border-bottom: none;
}

.arrow {
  color: var(--ink-dim);
  min-width: 1.1rem;
  padding-top: 0.45rem;
  user-select: none;
}

.prod-syms {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  flex: 1;
  min-width: 0;
}

.card-foot {
  display: flex;
  gap: 0.35rem;
  padding: 0.45rem 0.5rem;
  border-top: 1px solid var(--border);
}

.derive-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.55rem;
  padding: 0.65rem var(--pad) 0.35rem;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--bg);
}

.metro {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex: 1 1 16rem;
  min-width: 14rem;
  margin: 0;
  cursor: pointer;
}

.metro-name,
.metro-cap,
.metro-val {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  user-select: none;
  white-space: nowrap;
}

.metro-val {
  font-family: var(--mono);
  color: var(--accent);
  min-width: 2.6rem;
  letter-spacing: 0.04em;
}

.metro-body {
  position: relative;
  flex: 1;
  height: 2.4rem;
  display: flex;
  align-items: center;
}

.metro-scale {
  position: absolute;
  left: 0.45rem;
  right: 0.45rem;
  top: 0;
  bottom: 0;
  pointer-events: none;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.metro-scale i {
  display: block;
  width: 2px;
  background: var(--ink-dim);
  opacity: 0.7;
  height: 28%;
  font-style: normal;
}

.metro-scale i:nth-child(odd) {
  height: 40%;
}

.metro-scale i:nth-child(6) {
  height: 52%;
  background: var(--accent);
  opacity: 1;
}

.metro-scale::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 3px;
  margin-top: -1.5px;
  background: var(--border-2);
}

.metro-body input[type="range"] {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  z-index: 1;
  width: 100%;
  height: 2.4rem;
  margin: 0;
  background: transparent;
  cursor: grab;
}

.metro-body input[type="range"]:active {
  cursor: grabbing;
}

.metro-body input[type="range"]:focus {
  outline: none;
}

.metro-body input[type="range"]:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

.metro-body input[type="range"]::-webkit-slider-runnable-track {
  height: 3px;
  background: transparent;
}

.metro-body input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 26px;
  margin-top: -11.5px;
  background: var(--term-e);
  border: 2px solid var(--chip-ink);
  clip-path: polygon(12% 0, 88% 0, 100% 38%, 62% 100%, 38% 100%, 0 38%);
  box-shadow: 0 1px 0 var(--chip-ink);
}

.metro-body input[type="range"]::-moz-range-track {
  height: 3px;
  background: transparent;
  border: none;
}

.metro-body input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 26px;
  background: var(--term-e);
  border: 2px solid var(--chip-ink);
  border-radius: 0;
  clip-path: polygon(12% 0, 88% 0, 100% 38%, 62% 100%, 38% 100%, 0 38%);
}

.form-block {
  padding: 0 var(--pad);
  margin-bottom: 0.5rem;
}

.form-row .sym[data-kind="nt"] {
  cursor: pointer;
}

.form-row .sym[data-kind="term"] {
  cursor: default;
}

.ellipsis {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-width: var(--chip);
  min-height: var(--chip);
  padding: 0 0.55rem;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  vertical-align: middle;
}

.ellipsis i {
  display: block;
  width: 5px;
  height: 5px;
  margin: 0;
  font-style: normal;
  background: var(--ink);
  flex: none;
}

.canvas-frame {
  flex: 1;
  min-height: 12rem;
  margin: 0 var(--pad);
  border: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
  position: relative;
}

#trace {
  display: block;
  width: 100%;
  height: 100%;
}

.word-bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem var(--pad) 0.75rem;
  flex-wrap: wrap;
}

.legend {
  display: flex;
  gap: 0.25rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.legend [data-kind="term"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.35rem;
  padding: 0.05rem 0.28rem;
  color: var(--chip-ink);
}

.legend [data-value="N"] { background: var(--term-n); }
.legend [data-value="E"] { background: var(--term-e); }
.legend [data-value="W"] { background: var(--term-w); }
.legend [data-value="S"] { background: var(--term-s); }

span.sym {
  cursor: default;
}

.pick-row .sym,
.pick-row .eps {
  pointer-events: none;
}

body.vim-on button:focus {
  outline: none;
}

body.vim-on[data-mode="INSERT"] input:focus {
  outline: 2px solid var(--ring);
  outline-offset: -2px;
}

.steps {
  margin-left: auto;
  color: var(--ink-dim);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status {
  display: flex;
  gap: 1rem;
  align-items: center;
  min-height: 1.8rem;
  padding: 0.25rem var(--pad);
  background: var(--status);
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
  white-space: nowrap;
  overflow: hidden;
}

.status span:first-child {
  color: var(--accent);
}

#status-hint {
  overflow: hidden;
  text-overflow: ellipsis;
}

.scrim {
  position: fixed;
  inset: 0;
  background: var(--scrim);
  z-index: 20;
}

.sheet {
  position: fixed;
  z-index: 21;
  min-width: 16rem;
  max-width: min(28rem, calc(100vw - 1.5rem));
  background: var(--surface);
  border: 1px solid var(--border-2);
  padding: 0.55rem;
}

.sheet-title {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 0.45rem;
}

.sheet-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.pick-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  max-height: min(60vh, 24rem);
  overflow: auto;
}

.pick-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  align-items: center;
  padding: 0.35rem;
  border: 1px solid var(--border);
  background: var(--bg);
  cursor: pointer;
  text-align: left;
  width: 100%;
}

.pick-row.is-cursor,
.sheet-grid .sym.is-cursor,
.sheet-grid .chip.is-cursor {
  outline: 2px solid var(--ring);
  outline-offset: -2px;
}

.help {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: var(--scrim);
  display: grid;
  place-items: center;
  padding: 1rem;
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
}

.help-frame {
  width: min(40rem, 100%);
  max-height: 100%;
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--border-2);
}

.help-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--surface);
}

.help-head h2 {
  font-size: 1rem;
}

.help-body {
  padding: 0.85rem;
}

.help-body h3 {
  margin: 1rem 0 0.35rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.help-body h4 {
  margin: 0.7rem 0 0.25rem;
  font-size: 0.85rem;
}

.help-body p,
.help-lead {
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.keys {
  list-style: none;
  padding: 0;
  margin: 0 0 0.4rem;
}

.keys li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.2rem 0;
  color: var(--ink-dim);
}

kbd {
  font-family: var(--mono);
  font-size: 0.75rem;
  border: 1px solid var(--border);
  background: var(--bg);
  padding: 0.05rem 0.3rem;
  color: var(--ink);
}

.is-cursor {
  outline: 2px solid var(--ring);
  outline-offset: -2px;
}

.pane.is-inactive {
  opacity: 0.72;
}

body.vim-on .pane.is-inactive {
  opacity: 0.62;
}

@media (max-width: 899px) {
  body:has(.windrose-page) {
    overflow: hidden;
  }

  body:has(.windrose-page) .header {
    display: none;
  }

  body:has(.windrose-page) .container {
    padding: 0;
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
    height: 100svh;
    max-height: 100svh;
    min-height: 0;
  }

  body:has(.windrose-page) .content {
    padding: 0;
  }

  .windrose-page {
    --pad: 0.5rem;
    --chip: 1.85rem;
    font-size: 12px;
  }

  .windrose-app {
    font-size: 12px;
    border-left: none;
    border-right: none;
    border-bottom: none;
  }

  .topbar {
    flex-wrap: nowrap;
    min-height: 0;
    padding: 0.28rem 0.45rem;
    gap: 0.35rem;
    align-items: center;
  }

  .brand h1 {
    display: none;
  }

  .tabs {
    display: flex;
    flex: 1;
    min-width: 0;
    order: 0;
    flex-basis: auto;
  }

  .top-actions {
    margin-left: 0;
    flex: none;
  }

  #btn-vim {
    display: none;
  }

  .tab,
  .btn {
    min-height: 2rem;
    min-width: 0;
    padding: 0.22rem 0.45rem;
  }

  .brand-sub {
    display: none;
  }

  .panes {
    grid-template-columns: 1fr;
  }

  .pane-grammar {
    border-right: none;
  }

  body[data-pane="grammar"] .pane-derive,
  body[data-pane="derive"] .pane-grammar {
    display: none;
  }

  .pane-derive {
    overflow: hidden;
  }

  .derive-toolbar {
    position: static;
    gap: 0.3rem;
    padding: 0.35rem var(--pad) 0.2rem;
  }

  .metro {
    flex: 1 1 100%;
    min-width: 0;
    width: 100%;
    display: grid;
    grid-template-columns: auto 1fr auto;
    grid-template-areas:
      "name name val"
      "grow body halt";
    align-items: center;
    column-gap: 0.4rem;
    row-gap: 0.1rem;
  }

  .metro-name {
    grid-area: name;
  }

  .metro-grow {
    grid-area: grow;
  }

  .metro-body {
    grid-area: body;
    min-width: 0;
    height: 2.6rem;
  }

  .metro-halt {
    grid-area: halt;
  }

  .metro-val {
    grid-area: val;
    justify-self: end;
  }

  .metro-body input[type="range"] {
    height: 2.6rem;
  }

  .metro-scale::after {
    height: 6px;
    margin-top: -3px;
  }

  .metro-body input[type="range"]::-webkit-slider-thumb {
    width: 28px;
    height: 38px;
    margin-top: -16px;
  }

  .metro-body input[type="range"]::-moz-range-thumb {
    width: 28px;
    height: 38px;
  }

  .form-block {
    flex: 0 1 auto;
    max-height: 5.25rem;
    margin-bottom: 0.35rem;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
  }

  .canvas-frame {
    flex: 1 1 auto;
    width: auto;
    height: auto;
    min-height: 7rem;
    max-height: none;
    overflow: hidden;
  }

  .word-bar {
    flex: none;
    padding: 0.35rem var(--pad) max(0.4rem, env(safe-area-inset-bottom));
  }

  .sheet {
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    top: auto !important;
    width: 100%;
    max-width: none;
    max-height: min(70svh, 24rem);
    overflow: auto;
    padding-bottom: max(0.7rem, env(safe-area-inset-bottom));
  }

  .help {
    padding: 0;
    display: block;
  }

  .help-frame {
    width: 100%;
    height: 100%;
    max-height: none;
  }

  .status #status-hint {
    display: none;
  }
}

@media (pointer: coarse), (max-width: 700px) {
  .pick-row {
    min-height: 40px;
  }
}

@media (max-width: 899px) and (max-height: 700px) {
  .form-block {
    max-height: 4.35rem;
  }

  .canvas-frame {
    min-height: 6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}