*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  overflow: hidden;
  background: var(--space);
  color: var(--ink);
  font: 400 1rem / 1.5 var(--text);
  -webkit-font-smoothing: antialiased;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-underline-offset: 0.2em; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0; font-weight: 400; line-height: 1.15; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
::selection { background: var(--amber); color: var(--amber-ink); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
.num { font-variant-numeric: tabular-nums; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.noscript { position: fixed; inset: 0; display: grid; place-items: center; }
[hidden] { display: none !important; }

* { scrollbar-width: thin; scrollbar-color: var(--control) transparent; }

/* Buttons: one shape, flat fills. */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 42px; padding: 0 16px;
  border: 1px solid var(--control); border-radius: var(--radius-small);
  background: var(--panel-2); color: var(--ink);
  font-weight: 500; text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background-color 160ms var(--ease-out), border-color 160ms var(--ease-out), transform 120ms var(--ease-out);
}
.btn:hover { border-color: var(--muted); }
.btn:active { transform: translateY(1px) scale(0.97); }
/* Every button sinks a little when pressed, and a ripple (js/ui/press.js) spreads from the press. */
.bar-link, .units button, .bar-help, .ctl, .start-option, .qstep, .search-clear, .idea, .chip, .type-card { transition: transform 120ms var(--ease-out), background-color 160ms var(--ease-out), color 160ms var(--ease-out), border-color 160ms var(--ease-out); }
.bar-link:active, .units button:active, .bar-help:active, .ctl:active, button.start-option:not(:disabled):active,
.qstep:not(:disabled):active, .search-clear:active, .idea:active, .chip:active, .type-card:active { transform: scale(0.95); }
.press { position: absolute; inset: 0; border-radius: inherit; overflow: hidden; pointer-events: none; }
.press-dot { position: absolute; border-radius: 50%; background: currentColor; opacity: 0.24; transform: scale(0); animation: press-ripple 560ms var(--ease-out) forwards; }
@keyframes press-ripple { to { transform: scale(1); opacity: 0; } }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--amber); border-color: var(--amber); color: var(--amber-ink); }
.btn-primary:hover { background: var(--amber-hover); border-color: var(--amber-hover); }
.btn-quiet { background: transparent; border-color: transparent; color: var(--muted); }
.btn-quiet:hover { color: var(--ink); border-color: var(--control); }
.btn-small { min-height: 34px; padding: 0 12px; font-size: 0.875rem; }
.btn-icon { width: 42px; padding: 0; }
.btn svg { width: 18px; height: 18px; flex: none; }

.text-link { color: var(--ink); font-weight: 500; text-decoration: underline; text-decoration-color: var(--amber); text-decoration-thickness: 2px; background: none; border: 0; padding: 0; cursor: pointer; }
.text-link:hover { color: var(--ember); }

/* Form controls */
.field { display: grid; gap: 6px; }
.field > label, .field > .label { font-size: 0.875rem; color: var(--muted); }
.input, .select, textarea.input {
  width: 100%; min-height: 40px; padding: 8px 12px;
  background: var(--panel-2); border: 1px solid var(--control); border-radius: var(--radius-small);
  color: var(--ink);
}
textarea.input { min-height: 72px; resize: vertical; }
.input:focus, .select:focus { outline: none; border-color: var(--amber); }
input[type='range'] { accent-color: var(--amber); width: 100%; }
input[type='checkbox'], input[type='radio'] { accent-color: var(--amber); }

/* Segmented control */
.seg { display: inline-flex; padding: 3px; gap: 2px; background: var(--panel-2); border-radius: var(--radius-small); flex-wrap: wrap; }
.seg button, .seg label { min-height: 34px; padding: 0 12px; display: inline-flex; align-items: center; border: 0; border-radius: 4px; background: transparent; color: var(--muted); cursor: pointer; font-weight: 500; font-size: 0.9375rem; }
.seg button[aria-pressed='true'], .seg input:checked + span { background: var(--panel-3); color: var(--ink); }
.seg label { padding: 0; }
.seg label span { display: inline-flex; align-items: center; min-height: 34px; padding: 0 12px; border-radius: 4px; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label:has(input:focus-visible) span { outline: 2px solid var(--amber); }

/* Toasts and dialog */
.toasts { position: fixed; z-index: 90; left: 50%; transform: translateX(-50%); bottom: calc(var(--margin) + 76px); display: grid; gap: 8px; width: max-content; max-width: calc(100vw - 2 * var(--margin)); }
.toast { display: flex; align-items: center; gap: 12px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 14px; box-shadow: var(--shadow); max-width: 560px; }
.toast-error { border-color: rgba(255, 143, 143, 0.55); }
.toast-error::before { content: ''; flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--negative); }
.toast-action { flex: none; margin-left: auto; padding: 6px 12px; border: 0; border-radius: var(--radius-small); background: var(--amber); color: var(--amber-ink); font-weight: 600; cursor: pointer; white-space: nowrap; }
.toast-action:hover { background: var(--amber-hover); }
.toast-close { flex: none; width: 26px; height: 26px; padding: 0; border: 0; border-radius: 50%; background: transparent; color: var(--muted); font-size: 1.125rem; line-height: 1; cursor: pointer; }
.toast-close:hover { background: var(--panel-3); color: var(--ink); }
.dialog { border: 1px solid var(--border); border-radius: 12px; background: var(--panel); color: var(--ink); padding: 0; width: min(560px, calc(100vw - 32px)); box-shadow: var(--shadow); }
.dialog::backdrop { background: rgba(3, 5, 9, 0.6); }
.dialog-body { padding: 22px; display: grid; gap: 14px; }
.dialog-title { font-family: var(--display); font-weight: 300; font-size: 1.625rem; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; }
}