:root {
  --ink: #1f2a2e;
  --muted: #5d6b70;
  --paper: #f6f4ef;
  --surface: rgba(250, 249, 246, 0.94);
  --line: #d9dcd6;
  --accent: #2f5d62;
  --on-accent: #fff;
  --focus: #e0a43a;
  color-scheme: light;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; overflow: hidden; background: #dfe6ea; color: var(--ink);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif; -webkit-text-size-adjust: 100%; }
#viewport, #viewport canvas { position: fixed; inset: 0; display: block; }
body.walking #viewport canvas { touch-action: none; }
button, select, input { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: none; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

#title { position: fixed; top: max(12px, env(safe-area-inset-top)); left: max(12px, env(safe-area-inset-left));
  background: var(--surface); padding: 8px 12px; border-radius: 10px; box-shadow: 0 1px 6px rgba(0,0,0,.08); }
#title b { font: 600 16px/1 Georgia, serif; letter-spacing: -.3px; }
#title span { display: block; font-size: 10px; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); margin-top: 3px; }

#loading { position: fixed; inset: 0; display: grid; place-items: center; color: var(--muted); pointer-events: none; }

/* ---- design panel: right column on a desktop, bottom sheet on a phone */
#panel { position: fixed; top: max(12px, env(safe-area-inset-top)); right: max(12px, env(safe-area-inset-right));
  width: 320px; max-height: calc(100% - 96px); display: flex; flex-direction: column;
  background: var(--surface); border-radius: 12px; box-shadow: 0 2px 14px rgba(0,0,0,.12); }
#panel-toggle { display: none; }
#panel-body { overflow: auto; padding: 4px 14px 14px; overscroll-behavior: contain; }
fieldset { border: 0; border-top: 1px solid var(--line); margin: 0; padding: 10px 0 4px; }
fieldset:first-child { border-top: 0; }
legend { font-weight: 650; padding: 0; font-size: 13px; letter-spacing: .2px; }
.row { margin: 8px 0 10px; }
.label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.label span { color: var(--ink); margin-left: 4px; }
.label input { vertical-align: -2px; margin: 0 4px 0 0; accent-color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { width: 30px; height: 30px; border-radius: 50%; background: var(--chip); box-shadow: inset 0 0 0 1px rgba(0,0,0,.18); }
.chip[aria-pressed="true"] { box-shadow: inset 0 0 0 1px rgba(0,0,0,.18), 0 0 0 2px var(--paper), 0 0 0 4px var(--accent); }
.seg { display: flex; flex-wrap: wrap; gap: 4px; }
.seg button { padding: 6px 10px; border-radius: 999px; background: #e8e9e4; font-size: 13px; }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--on-accent); }
.note { font-size: 12px; color: var(--muted); margin-top: 8px; }
.note b { color: var(--ink); font-weight: 600; }
.note a { color: var(--accent); }
input[type=range] { width: 100%; accent-color: var(--accent); }
fieldset a.drawings { display: inline-block; font-size: 12px; color: var(--accent); margin: 2px 0 4px; }
#dock #tour { background: #c4561a; color: #fff; font-weight: 600; }
#dock #tour-pick { max-width: 150px; text-overflow: ellipsis; }
@media (max-width: 720px) { #dock #tour-pick, #dock #share { display: none; } }

/* ---- dock */
#dock { position: fixed; left: 50%; transform: translateX(-50%); bottom: max(12px, env(safe-area-inset-bottom));
  display: flex; gap: 4px; align-items: center; background: var(--surface); padding: 5px; border-radius: 999px;
  box-shadow: 0 2px 14px rgba(0,0,0,.12); }
#dock button, #dock select { height: 36px; padding: 0 12px; border-radius: 999px; }
#dock select { border: 0; background: #e8e9e4; -webkit-appearance: none; appearance: none; padding: 0 14px; font-weight: 600; }
#dock #walk, #dock #share { background: var(--accent); color: var(--on-accent); font-weight: 600; }
#dock #share { background: #e8e9e4; color: var(--ink); }
#prev-view, #next-view { font-size: 20px; width: 36px; padding: 0 !important; }

#toast { position: fixed; left: 50%; top: 16px; transform: translateX(-50%); background: var(--ink); color: #fff;
  padding: 8px 14px; border-radius: 8px; opacity: 0; transition: opacity .2s; pointer-events: none; }
#toast.on { opacity: 1; }

/* ---- walk pad: arrow keys on a desktop, a joystick under the left thumb on touch */
#walk-pad { position: fixed; left: 16px; bottom: 72px; text-align: center; background: var(--surface); padding: 10px;
  border-radius: 12px; max-width: 260px; box-shadow: 0 2px 14px rgba(0,0,0,.12); }
#walk-pad[hidden] { display: none; }
#walk-pad button { padding: 10px 16px; border-radius: 6px; margin: 3px; background: #e8e9e4; touch-action: none; }
#walk-pad small { display: block; font-size: 11px; color: var(--muted); margin-top: 4px; }
#walk-stick, #walk-pad .walk-hint-touch { display: none; }
.walk-rise { display: flex; justify-content: center; }
#walk-pad #finish-walk { display: block; margin: 3px auto; }

@media (pointer: coarse) {
  #walk-pad { left: 0; right: 0; bottom: calc(max(12px, env(safe-area-inset-bottom)) + 56px); max-width: none;
    padding: 0 max(12px, env(safe-area-inset-right)) 0 max(12px, env(safe-area-inset-left)); background: none; box-shadow: none;
    pointer-events: none; display: flex; justify-content: space-between; align-items: flex-end; }
  #walk-pad[hidden] { display: none; }
  #walk-pad > * { pointer-events: auto; }
  #walk-pad .walk-keys, #walk-pad #finish-walk, #walk-pad .walk-hint-keys { display: none; }
  .walk-rise { flex-direction: column; }
  #walk-stick { display: block; flex: none; position: relative; width: 128px; height: 128px; border-radius: 50%;
    background: rgba(23,32,28,.38); touch-action: none; -webkit-user-select: none; user-select: none; }
  #walk-knob { position: absolute; left: 50%; top: 50%; width: 56px; height: 56px; margin: -28px 0 0 -28px;
    border-radius: 50%; background: rgba(255,255,255,.88); pointer-events: none; }
  #walk-pad .walk-rise button { min-width: 52px; min-height: 48px; margin: 3px 0; background: rgba(23,32,28,.6); color: #fff; }
  #walk-pad .walk-hint-touch { display: block; position: fixed; left: 50%; bottom: calc(max(12px, env(safe-area-inset-bottom)) + 200px);
    transform: translateX(-50%); width: max-content; max-width: 90%; padding: 5px 10px; border-radius: 8px;
    background: rgba(23,32,28,.7); color: #fff; font-size: 11px; pointer-events: none; }
}

@media (max-width: 720px) {
  #panel { top: auto; left: 0; right: 0; bottom: 0; width: auto; background: var(--paper); max-height: 62%; border-radius: 14px 14px 0 0;
    padding-bottom: env(safe-area-inset-bottom); transform: translateY(calc(100% - 44px)); transition: transform .25s; z-index: 2; }
  body.panel-open #panel { transform: none; }
  #panel-toggle { display: block; height: 44px; font-weight: 650; flex: none; }
  #panel-toggle::after { content: " ▴"; color: var(--muted); }
  body.panel-open #panel-toggle::after { content: " ▾"; }
  #dock { bottom: calc(max(12px, env(safe-area-inset-bottom)) + 52px); max-width: calc(100% - 24px); }
  #dock select { max-width: 120px; }
  body.walking #panel { display: none; }
  body.walking #dock { bottom: max(12px, env(safe-area-inset-bottom)); }
  body.walking #walk-pad { bottom: calc(max(12px, env(safe-area-inset-bottom)) + 56px); }
}
@media (prefers-reduced-motion: reduce) { #panel { transition: none; } }

/* ---- existing / proposed, extras */
.state { margin: 12px 0 4px; }
.state button { flex: 1; }
.locked { opacity: .5; pointer-events: none; }
body[data-state="existing"] #title span::after { content: " · existing"; color: #c4561a; }
button.wide, label.wide { display: block; width: 100%; text-align: left; padding: 8px 10px; margin: 4px 0; border-radius: 8px; background: #e8e9e4; font-size: 13px; cursor: pointer; }
label.filepick input { display: block; margin-top: 4px; font-size: 12px; }
#compass { position: fixed; top: calc(max(12px, env(safe-area-inset-top)) + 56px); left: max(12px, env(safe-area-inset-left));
  width: 40px; height: 40px; border-radius: 50%; background: var(--surface); box-shadow: 0 1px 6px rgba(0,0,0,.1);
  display: grid; place-items: center; transform: rotate(var(--north, 0deg)); }
#compass i { font: 700 12px/1 system-ui, sans-serif; font-style: normal; color: #c4561a; transform: translateY(-9px); }
#compass::after { content: ""; position: absolute; width: 2px; height: 14px; background: #c4561a; top: 5px; border-radius: 1px; opacity: .5; }
body.full #panel, body.full #dock, body.full #title, body.full #compass { display: none; }