@font-face {
  font-family: "Space Grotesk";
  src: url("/fonts/space-grotesk-latin.woff2") format("woff2");
  font-weight: 300 700;
  font-display: swap;
}

:root {
  color-scheme: dark light;
  --bg: #181512;
  --surface: #211d19;
  --surface-raised: #2a2520;
  --control: #302a24;
  --border: #4a4036;
  --border-soft: #39312a;
  --ink: #f6eee5;
  --ink-muted: #c4b6a7;
  --accent: #ef8c63;
  --on-accent: #21130d;
  --danger: #ff9a9f;
  --paint: #869a76;
  --paint-ink: #10140e;
  --neutral-wall: #b9ad9c;
  --display: "Space Grotesk", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --body: system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius-sm: 8px;
  --radius: 12px;
  --shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f0e8;
    --surface: #fbf8f2;
    --surface-raised: #ffffff;
    --control: #ffffff;
    --border: #aa9c8d;
    --border-soft: #d9d0c5;
    --ink: #282019;
    --ink-muted: #6a5d51;
    --accent: #a43d1d;
    --on-accent: #ffffff;
    --danger: #9e2530;
    --shadow: 0 16px 40px rgba(65, 48, 32, 0.1);
  }
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
  scroll-padding-bottom: calc(5rem + env(safe-area-inset-bottom));
}

body {
  margin: 0;
  min-height: 100svh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
summary,
select,
input[type="color"] {
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  left: 0.75rem;
  top: -5rem;
  z-index: 100;
  min-height: 44px;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
}

.skip-link:focus {
  top: max(0.75rem, env(safe-area-inset-top));
}

:where(a, button, summary, input, select, textarea):focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

/* Header ------------------------------------------------------------------ */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1180px, 100%);
  min-height: 60px;
  margin: 0 auto;
  padding:
    max(0.65rem, env(safe-area-inset-top))
    max(clamp(1rem, 4vw, 2rem), env(safe-area-inset-right))
    0.65rem
    max(clamp(1rem, 4vw, 2rem), env(safe-area-inset-left));
}

.brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  font-family: var(--display);
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand b {
  color: var(--accent);
  font-weight: 700;
}

.brand-mark {
  width: 27px;
  height: 27px;
  fill: none;
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.9;
}

.brand-mark-fill {
  fill: var(--accent);
  stroke: none;
}

.trust {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.trust > span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--paint);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--paint) 20%, transparent);
}

/* Workbench --------------------------------------------------------------- */

main {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding:
    0 max(clamp(1rem, 4vw, 2rem), env(safe-area-inset-right))
    4rem max(clamp(1rem, 4vw, 2rem), env(safe-area-inset-left));
}

.studio {
  padding: clamp(1rem, 2.6vw, 1.75rem);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.studio__intro {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-bottom: clamp(0.9rem, 2vw, 1.2rem);
  border-bottom: 1px solid var(--border-soft);
}

.studio__intro h1 {
  flex: 0 0 auto;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.045em;
}

.tagline {
  max-width: 29rem;
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.94rem;
  text-align: right;
}

.calculator-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(380px, 38vw, 440px);
  grid-template-areas:
    "core estimate"
    "advanced estimate"
    "preview estimate";
  align-items: start;
  gap: 1rem clamp(1.4rem, 3vw, 2.4rem);
  padding-top: clamp(1rem, 2.4vw, 1.5rem);
}

.core-inputs {
  grid-area: core;
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 1rem;
}

.estimate-column {
  position: sticky;
  top: 0.75rem;
  grid-area: estimate;
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.75rem;
}

.advanced {
  grid-area: advanced;
}

/* Fields ------------------------------------------------------------------ */

.field {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.field__label {
  display: block;
  margin: 0 0 0.4rem;
  color: var(--ink-muted);
  font-family: var(--display);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.field__hint {
  color: var(--ink-muted);
  font-family: var(--body);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.field-error {
  display: block;
  margin-top: 0.3rem;
  color: var(--danger);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.25;
}

.input-toolbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
}

.reset-button {
  min-height: 44px;
  padding: 0.55rem 0;
  border: 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
  color: var(--ink-muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.reset-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.seg {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--control);
}

.seg__btn {
  min-width: 44px;
  min-height: 44px;
  padding: 0.5rem 0.85rem;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--ink-muted);
  font-family: var(--display);
  font-size: 0.86rem;
  font-weight: 650;
}

.seg__btn:hover {
  color: var(--ink);
}

.seg__btn[aria-pressed="true"] {
  background: var(--accent);
  color: var(--on-accent);
}

.dims {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.dim,
.adv-field,
.stepper {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 0.25rem;
  color: var(--ink-muted);
  font-size: 0.78rem;
  font-weight: 650;
}

.dim__control,
.adv-control {
  display: flex;
  min-height: 46px;
  align-items: center;
  padding: 0 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--control);
}

.dim__control:focus-within,
.adv-control:focus-within,
.stepper__control:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent);
}

.dim__control:has(input[aria-invalid="true"]),
.adv-control:has(input[aria-invalid="true"]),
.stepper__control:has(input[aria-invalid="true"]) {
  border-color: var(--danger);
}

.dim__control input,
.adv-control input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--display);
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  font-weight: 650;
}

.dim__unit,
.adv-control > span:not(.adv-control__lead) {
  flex: 0 0 auto;
  padding-left: 0.3rem;
  color: var(--ink-muted);
  font-size: 0.72rem;
  white-space: nowrap;
}

.adv-control__lead {
  flex: 0 0 auto;
  padding-right: 0.15rem;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.quick-fields {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 0.75rem;
}

.chips {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
}

.toggle-chip {
  position: relative;
  display: flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--control);
  color: var(--ink-muted);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.toggle-chip input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.toggle-chip::before {
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--border);
  border-radius: 4px;
  content: "";
}

.toggle-chip:has(input:checked) {
  border-color: var(--accent);
  color: var(--ink);
  background: color-mix(in srgb, var(--accent) 13%, var(--control));
}

.toggle-chip:has(input:checked)::before {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: inset 0 0 0 3px var(--control);
}

.toggle-chip:has(input[aria-invalid="true"]) {
  border-color: var(--danger);
}

.toggle-chip:has(input:focus-visible) {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.seg--coats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: 100%;
}

.seg--coats .seg__btn {
  padding-inline: 0.35rem;
}

.steppers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

.stepper__name {
  color: var(--ink-muted);
}

.stepper__control {
  display: flex;
  min-height: 46px;
  align-items: stretch;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--control);
}

.stepper__btn {
  flex: 0 0 44px;
  min-width: 44px;
  min-height: 44px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--display);
  font-size: 1.2rem;
}

.stepper__btn:hover:not(:disabled) {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
}

.stepper__btn:disabled {
  color: color-mix(in srgb, var(--ink-muted) 45%, transparent);
  cursor: not-allowed;
}

.stepper__control input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  text-align: center;
  font-family: var(--display);
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  -moz-appearance: textfield;
}

.stepper__control input::-webkit-inner-spin-button,
.stepper__control input::-webkit-outer-spin-button {
  margin: 0;
  -webkit-appearance: none;
}

/* Result ------------------------------------------------------------------ */

.result {
  padding: clamp(1rem, 2.2vw, 1.35rem);
  border: 1px solid var(--border);
  border-top: 4px solid var(--accent);
  border-radius: var(--radius);
  background: var(--surface-raised);
}

.result:focus {
  outline: none;
}

.result:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.result__heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.result__eyebrow,
.preview-heading__eyebrow {
  margin: 0;
  color: var(--ink-muted);
  font-family: var(--display);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.result__rounding {
  color: var(--ink-muted);
  font-size: 0.68rem;
  font-weight: 650;
}

.result__primary {
  margin: 0.15rem 0 0;
  color: var(--accent);
  font-family: var(--display);
  font-size: clamp(2.7rem, 6vw, 4.1rem);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 1;
}

.result__primary.is-updating {
  animation: result-update 220ms ease-out;
}

@keyframes result-update {
  0% { opacity: 0.62; transform: translateY(4px); }
  100% { opacity: 1; transform: translateY(0); }
}

.result__cost {
  margin: 0.35rem 0 0;
  color: var(--ink);
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 650;
}

.result__sub,
.result__error {
  margin: 0.55rem 0 0;
  color: var(--ink-muted);
  font-size: 0.82rem;
}

.result__error {
  color: var(--danger);
  font-weight: 700;
}

.result[data-result-state="invalid"] .result__primary {
  max-width: 24rem;
  color: var(--danger);
  font-size: clamp(1.65rem, 4vw, 2.2rem);
  letter-spacing: -0.035em;
}

.breakdown {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1rem;
  margin: 0.8rem 0 0;
  padding: 0;
  border-top: 1px solid var(--border-soft);
}

.breakdown > div {
  min-width: 0;
  padding: 0.65rem 0 0.55rem;
  border-bottom: 1px solid var(--border-soft);
}

.breakdown dt {
  color: var(--ink-muted);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.breakdown dd {
  margin: 0.15rem 0 0;
  color: var(--ink);
  font-family: var(--display);
  font-size: 0.98rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.result-why {
  border-bottom: 1px solid var(--border-soft);
}

.result-why > summary,
.advanced > summary {
  position: relative;
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-right: 1.6rem;
  color: var(--ink);
  font-family: var(--display);
  font-size: 0.82rem;
  font-weight: 700;
  list-style: none;
}

.result-why > summary::-webkit-details-marker,
.advanced > summary::-webkit-details-marker,
.faq summary::-webkit-details-marker {
  display: none;
}

.result-why > summary::after,
.advanced > summary::after,
.faq summary::after {
  position: absolute;
  right: 0.1rem;
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 500;
  content: "+";
}

.result-why[open] > summary::after,
.advanced[open] > summary::after,
.faq details[open] summary::after {
  content: "−";
}

.result-why__body {
  padding: 0 0 0.8rem;
  color: var(--ink-muted);
  font-size: 0.78rem;
}

.result-why__body p {
  margin: 0;
  color: var(--ink);
  font-family: var(--display);
  font-weight: 650;
}

.result-why__body ul {
  margin: 0.45rem 0 0;
  padding-left: 1.1rem;
}

.result-why__body li + li {
  margin-top: 0.25rem;
}

.result__actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
  margin-top: 0.85rem;
}

.btn {
  min-height: 46px;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  font-family: var(--display);
  font-size: 0.84rem;
  font-weight: 700;
}

.btn--primary {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.btn--secondary {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--ink);
}

.btn:hover:not(:disabled) {
  border-color: var(--accent);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.action-note {
  min-height: 1.15em;
  margin: 0.45rem 0 0;
  color: var(--ink-muted);
  font-size: 0.76rem;
}

.copy-fallback {
  display: block;
  margin-top: 0.65rem;
  color: var(--ink-muted);
  font-size: 0.76rem;
  font-weight: 700;
}

.copy-fallback textarea {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.65rem;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--control);
  color: var(--ink);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.73rem;
  line-height: 1.45;
}

/* Colour + room ----------------------------------------------------------- */

.visual-preview {
  grid-area: preview;
  padding: 0.9rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface);
}

.preview-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.preview-heading h2 {
  margin: 0.05rem 0 0;
  font-family: var(--display);
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.custom-colour {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 0.4rem;
  color: var(--ink-muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.custom-colour input[type="color"] {
  width: 44px;
  height: 44px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--control);
}

.custom-colour input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.custom-colour input[type="color"]::-webkit-color-swatch {
  border: 0;
  border-radius: 4px;
}

.swatches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(44px, 1fr));
  gap: 0.35rem;
  margin-top: 0.6rem;
}

.swatch {
  position: relative;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border: 1px solid rgba(0, 0, 0, 0.3);
  border-radius: 7px;
  background: var(--sw);
}

.swatch[aria-pressed="true"] {
  box-shadow:
    0 0 0 2px var(--surface),
    0 0 0 4px var(--accent);
}

.swatch[aria-pressed="true"]::after {
  position: absolute;
  inset: 0;
  width: 12px;
  height: 12px;
  margin: auto;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  content: "";
  mix-blend-mode: difference;
}

.room {
  position: relative;
  height: 180px;
  margin-top: 0.7rem;
  overflow: hidden;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: #171411;
}

.room__fallback,
.room__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.room__fallback {
  display: grid;
  place-items: center;
  opacity: 1;
}

.room__fallback svg {
  width: 86%;
  height: 86%;
}

.svg-wall {
  fill: var(--paint);
}

.svg-wall--right {
  opacity: 0.82;
}

.svg-ceiling {
  fill: #eee7dd;
  opacity: 0.78;
}

.svg-floor {
  fill: #000000;
  opacity: 0.2;
}

.svg-window {
  fill: #a9cadb;
  opacity: 0.9;
}

.svg-door {
  fill: #37291f;
}

.room[data-paint-walls="false"] .svg-wall {
  fill: var(--neutral-wall);
}

.room[data-paint-ceiling="true"] .svg-ceiling {
  fill: var(--paint);
}

.room__canvas {
  display: block;
  opacity: 0;
  touch-action: pan-y;
  transition: opacity 240ms ease-out;
}

.room[data-room-status="ready"] .room__canvas {
  opacity: 1;
}

.room[data-room-status="ready"] .room__fallback {
  opacity: 0;
}

.room__enable {
  position: absolute;
  left: 50%;
  bottom: 0.65rem;
  z-index: 2;
  min-height: 44px;
  padding: 0.55rem 0.9rem;
  transform: translateX(-50%);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-raised);
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 700;
  white-space: nowrap;
}

.room__controls {
  position: absolute;
  right: 0.45rem;
  bottom: 0.45rem;
  z-index: 2;
  display: flex;
  gap: 0.25rem;
}

.room__controls button {
  min-width: 44px;
  min-height: 44px;
  padding: 0.4rem 0.55rem;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 7px;
  background: rgba(24, 21, 18, 0.9);
  color: #f6eee5;
  font-size: 0.7rem;
  font-weight: 700;
}

.room__message {
  position: absolute;
  left: 0.55rem;
  bottom: 0.55rem;
  z-index: 2;
  max-width: calc(100% - 1.1rem);
  margin: 0;
  padding: 0.25rem 0.4rem;
  border-radius: 5px;
  background: rgba(24, 21, 18, 0.82);
  color: #d6c9bc;
  font-size: 0.67rem;
  font-weight: 650;
  pointer-events: none;
}

.room[data-room-status="ready"] .room__message {
  display: none;
}

/* Advanced ---------------------------------------------------------------- */

.advanced {
  border-top: 1px solid var(--border-soft);
}

.advanced > summary span:last-child {
  color: var(--ink-muted);
  font-family: var(--body);
  font-size: 0.7rem;
  font-weight: 500;
}

.advanced__body {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 0.35rem 0 0.2rem;
}

.adv-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.adv-field select {
  min-height: 46px;
  padding: 0 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--control);
  color: var(--ink);
  font-size: 0.84rem;
}

/* FAQ --------------------------------------------------------------------- */

.faq {
  max-width: 800px;
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.faq > h2 {
  margin: 0 0 0.8rem;
  font-family: var(--display);
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  letter-spacing: -0.03em;
}

.faq details {
  border-bottom: 1px solid var(--border-soft);
}

.faq summary {
  position: relative;
  display: flex;
  min-height: 58px;
  align-items: center;
  padding: 0.85rem 2.1rem 0.85rem 0;
  color: var(--ink);
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 650;
  list-style: none;
}

.faq summary::after {
  top: 50%;
  transform: translateY(-50%);
}

.faq details p {
  max-width: 720px;
  margin: 0;
  padding: 0 0 1rem;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

/* Mobile result dock ------------------------------------------------------ */

.result-dock {
  position: fixed;
  right: max(0.75rem, env(safe-area-inset-right));
  bottom: max(0.75rem, env(safe-area-inset-bottom));
  left: max(0.75rem, env(safe-area-inset-left));
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  min-height: 54px;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 0.85rem;
  visibility: hidden;
  transform: translateY(calc(100% + 2rem));
  border: 1px solid var(--accent);
  border-radius: 10px;
  background: var(--accent);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  color: var(--on-accent);
  opacity: 0;
  pointer-events: none;
  transition:
    transform 180ms ease-out,
    opacity 180ms ease-out,
    visibility 0s linear 180ms;
}

.result-dock strong {
  font-family: var(--display);
  font-size: 1.05rem;
}

.result-dock span {
  font-size: 0.7rem;
  font-weight: 700;
}

.result-dock span:last-child {
  text-align: right;
}

.result-dock[data-visible="true"] {
  visibility: visible;
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
  transition-delay: 0s;
}

/* Footer + legal ---------------------------------------------------------- */

.site-footer {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding:
    2rem max(clamp(1rem, 4vw, 2rem), env(safe-area-inset-right))
    max(2.5rem, env(safe-area-inset-bottom))
    max(clamp(1rem, 4vw, 2rem), env(safe-area-inset-left));
  border-top: 1px solid var(--border-soft);
  text-align: center;
}

.footer-disclaimer {
  max-width: 650px;
  margin: 0 auto 0.7rem;
  color: var(--ink-muted);
  font-size: 0.8rem;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.82rem;
}

.footer-link,
.legal-back {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 0.25em;
}

.footer-link:hover,
.legal-back:hover {
  color: var(--accent);
}

.legal-dialog {
  width: min(680px, 92vw);
  max-height: 84svh;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
}

.legal-dialog::backdrop {
  background: rgba(8, 6, 4, 0.72);
}

.legal-dialog-frame {
  position: relative;
  padding: 1.25rem clamp(1rem, 4vw, 1.8rem) 1.8rem;
}

.legal-close {
  position: sticky;
  top: 0.1rem;
  float: right;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--control);
  color: var(--ink);
}

.legal-close:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.legal-page {
  background: var(--bg);
}

.legal-page-shell {
  max-width: 680px;
  margin: 0 auto;
  padding: 2rem clamp(1rem, 4vw, 2rem) 4rem;
}

.legal-back {
  margin-bottom: 1.1rem;
  color: var(--accent);
  font-size: 0.88rem;
}

.legal-copy .eyebrow {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.legal-copy h1 {
  margin: 0 0 0.25rem;
  font-family: var(--display);
  font-size: clamp(1.55rem, 4vw, 2rem);
  letter-spacing: -0.03em;
}

.legal-copy .legal-updated {
  margin: 0 0 1.3rem;
  color: var(--ink-muted);
  font-size: 0.8rem;
}

.legal-copy h2 {
  margin: 1.35rem 0 0.35rem;
  font-family: var(--display);
  font-size: 1.02rem;
}

.legal-copy p,
.legal-copy li {
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.legal-copy a {
  color: var(--accent);
}

.legal-copy footer {
  margin-top: 1.8rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border-soft);
  color: var(--ink-muted);
  font-size: 0.8rem;
}

.error-page main {
  padding-top: 13vh;
  text-align: center;
}

.error-code {
  margin: 0;
  color: var(--accent);
  font-family: var(--display);
  font-size: clamp(4rem, 16vw, 7rem);
  font-weight: 700;
}

/* Responsive -------------------------------------------------------------- */

@media (max-width: 900px) {
  body {
    padding-bottom: calc(4.75rem + env(safe-area-inset-bottom));
  }

  .studio__intro {
    display: block;
  }

  .tagline {
    margin-top: 0.35rem;
    text-align: left;
  }

  .calculator-flow {
    grid-template-columns: 1fr;
    grid-template-areas:
      "core"
      "estimate"
      "advanced"
      "preview";
  }

  .estimate-column {
    position: static;
  }

  .result-dock {
    display: grid;
  }
}

@media (min-width: 901px) {
  .result-dock {
    display: none;
  }

  .room {
    height: 150px;
  }
}

@media (max-width: 560px) {
  .site-header {
    min-height: 54px;
  }

  main {
    padding-inline:
      max(0.75rem, env(safe-area-inset-left))
      max(0.75rem, env(safe-area-inset-right));
  }

  .studio {
    padding: 0.9rem;
  }

  .studio__intro h1 {
    font-size: 1.8rem;
  }

  .tagline {
    font-size: 0.82rem;
  }

  .calculator-flow,
  .core-inputs {
    gap: 0.8rem;
  }

  .dims {
    gap: 0.35rem;
  }

  .dim {
    font-size: 0.7rem;
  }

  .dim__control {
    padding-inline: 0.45rem;
  }

  .dim__control input {
    font-size: 0.9rem;
  }

  .dim__unit {
    font-size: 0.65rem;
  }

  .quick-fields {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 0.45rem;
  }

  .toggle-chip {
    padding-inline: 0.35rem;
    font-size: 0.75rem;
  }

  .result {
    padding: 0.9rem;
  }

  .result__primary {
    font-size: 3rem;
  }

  .visual-preview {
    padding: 0.75rem;
  }

  .room {
    height: 190px;
  }

  .advanced > summary span:last-child {
    display: none;
  }
}

@media (max-width: 420px) {
  .trust {
    font-size: 0;
  }

  .trust::after {
    font-size: 0.68rem;
    content: "Private";
  }

  .brand {
    font-size: 1rem;
  }

  .room__controls button[data-room-action="pause"],
  .room__controls button[data-room-action="reset"] {
    padding-inline: 0.4rem;
  }

  .result-dock {
    grid-template-columns: auto 1fr auto;
  }
}

@media (max-width: 360px) {
  .site-header {
    min-height: 52px;
    padding-top: max(0.25rem, env(safe-area-inset-top));
    padding-bottom: 0.25rem;
  }

  .studio {
    padding: 0.75rem;
  }

  .tagline {
    display: none;
  }

  .studio__intro h1 {
    font-size: 1.7rem;
  }

  .studio__intro {
    padding-bottom: 0.35rem;
  }

  .calculator-flow {
    gap: 0.65rem;
    padding-top: 0.45rem;
  }

  .core-inputs {
    gap: 0.65rem;
  }

  .field__label {
    margin-bottom: 0.25rem;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}