/* Chapter 04 — light shaping, studio lab and flash math */

/* ---------- Top-view light map ---------- */

.light-map-wrap {
  margin: 30px 0;
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 42%, rgba(199, 164, 106, 0.07), transparent 62%),
    var(--surface);
}

.light-map-svg {
  display: block;
  width: 100%;
  max-width: 680px;
  height: auto;
  margin: 0 auto;
}

.lm-ring circle {
  fill: none;
  stroke: rgba(241, 236, 223, 0.08);
  stroke-width: 1;
}

.lm-axis {
  stroke: rgba(199, 164, 106, 0.45);
  stroke-width: 1;
  stroke-dasharray: 3 7;
}

.lm-arc {
  fill: none;
  stroke: var(--gold);
  stroke-width: 1.4;
  stroke-dasharray: 4 5;
}

.lm-angle {
  fill: var(--gold-bright);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-anchor: middle;
}

.lm-camera rect {
  fill: var(--bg);
  stroke: rgba(241, 236, 223, 0.34);
  stroke-width: 1.2;
}

.lm-camera .lm-lens {
  fill: rgba(199, 164, 106, 0.16);
  stroke: var(--gold);
}

.lm-camera text,
.lm-subject text {
  fill: var(--faint);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-anchor: middle;
}

.lm-subject circle {
  fill: rgba(241, 236, 223, 0.06);
  stroke: var(--gold);
  stroke-width: 1.2;
}

.lm-subject path {
  fill: none;
  stroke: rgba(199, 164, 106, 0.55);
  stroke-width: 1.2;
}

.lm-key-icon rect {
  fill: #27241c;
  stroke: var(--gold);
  stroke-width: 1.2;
}

.lm-key-icon .lm-key-face {
  fill: var(--gold-bright);
  stroke: none;
}

.lm-fill-icon rect {
  fill: var(--bg);
  stroke: rgba(241, 236, 223, 0.48);
  stroke-width: 1.2;
}

.lm-rim-glow {
  fill: rgba(230, 195, 139, 0.16);
}

.lm-rim-core {
  fill: var(--gold-bright);
}

.lm-bg-icon rect {
  fill: rgba(241, 236, 223, 0.14);
  stroke: rgba(241, 236, 223, 0.42);
  stroke-width: 1;
}

.lm-label {
  fill: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-anchor: middle;
}

.lm-label--key {
  fill: var(--gold-bright);
}

.light-map-caption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 12px;
  line-height: 1.7;
}

.light-map-caption span:first-child {
  color: var(--gold);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

@media (max-width: 640px) {
  .lm-label,
  .lm-angle {
    font-size: 20px;
  }

  .lm-camera text,
  .lm-subject text {
    font-size: 18px;
  }
}

/* ---------- Pattern library ---------- */

.pattern-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.pattern-card {
  display: flex;
  flex-direction: column;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
}

.pattern-media {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: #080806;
}

.pattern-media::after {
  content: "";
  position: absolute;
  inset: 55% 0 0;
  background: linear-gradient(to bottom, transparent, rgba(8, 8, 6, 0.66));
  pointer-events: none;
}

.pattern-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s var(--ease);
}

.pattern-card:hover .pattern-media img {
  transform: scale(1.025);
}

.pattern-index {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 1;
  padding: 4px 7px;
  border: 1px solid rgba(241, 236, 223, 0.2);
  background: rgba(12, 13, 11, 0.62);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  backdrop-filter: blur(5px);
}

.pattern-tag {
  position: absolute;
  right: 14px;
  bottom: 12px;
  z-index: 1;
  color: var(--gold-bright);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.pattern-card figcaption {
  flex: 1;
  padding: 18px 20px 20px;
}

.pattern-card h3 {
  margin: 0 0 5px;
  font-family: var(--serif);
  font-size: clamp(1.3rem, 1.8vw, 1.55rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.pattern-card .pattern-setup {
  color: var(--gold);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.pattern-card figcaption > p:not(.pattern-setup) {
  max-width: none;
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

.pattern-facts {
  display: grid;
  gap: 6px;
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.pattern-facts div {
  display: flex;
  gap: 10px;
}

.pattern-facts dt {
  flex: 0 0 34px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.7;
}

.pattern-facts dd {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

/* ---------- Compare cards ---------- */

.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.compare-card {
  padding: 22px 24px 24px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.compare-card .mono {
  color: var(--gold);
}

.compare-card h3 {
  margin: 10px 0;
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.45;
}

.compare-card p {
  max-width: none;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

.compare-card ul {
  display: grid;
  gap: 6px;
  margin: 14px 0 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.compare-card li {
  position: relative;
  padding-left: 14px;
  color: var(--faint);
  font-size: 12px;
  line-height: 1.7;
}

.compare-card li::before {
  content: "";
  position: absolute;
  top: 0.66em;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  opacity: 0.7;
}

/* ---------- Step lists ---------- */

.step-list {
  margin: 26px 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.step-list li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 19px 0;
  border-bottom: 1px solid var(--line);
}

.step-num {
  padding-top: 2px;
  color: var(--gold);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.step-list b {
  display: block;
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.6;
}

.step-list p {
  max-width: 62ch;
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

.step-list--compact li {
  padding: 14px 0;
}

.step-list.checklist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 32px;
}

.step-list.checklist li {
  grid-template-columns: 38px minmax(0, 1fr);
  padding: 16px 0;
}

.step-list.checklist li::before {
  content: none;
}

/* ---------- Ratio calculator ---------- */

.ratio-lab {
  margin: 28px 0;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(199, 164, 106, 0.05), transparent 55%),
    var(--surface);
}

.ratio-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
}

.ratio-head .mono {
  color: var(--gold);
}

.ratio-head h3 {
  margin: 8px 0 0;
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

.ratio-value {
  color: var(--gold-bright);
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.9rem);
  letter-spacing: -0.03em;
  line-height: 1;
  white-space: nowrap;
}

.ratio-controls {
  margin-top: 20px;
}

.ratio-controls label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.ratio-controls output {
  color: var(--gold-bright);
  font-family: var(--mono);
  font-size: 12px;
}

.ratio-bar {
  position: relative;
  height: 34px;
  margin-top: 6px;
}

.ratio-track {
  position: absolute;
  top: 8px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, rgba(241, 236, 223, 0.16), var(--gold) 52%, #a06a47);
}

.ratio-needle {
  position: absolute;
  top: 2px;
  left: 40%;
  width: 2px;
  height: 14px;
  background: var(--ink);
  box-shadow: 0 0 0 3px rgba(241, 236, 223, 0.08);
  transform: translateX(-1px);
  transition: left 0.18s var(--ease);
}

.ratio-ticks {
  position: absolute;
  top: 19px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.03em;
}

.ratio-ticks i {
  font-style: normal;
}

.ratio-readout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.ratio-readout span {
  display: block;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.ratio-readout strong {
  display: block;
  margin-top: 5px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
}

.ratio-advice {
  max-width: none;
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

/* ---------- Studio lab ---------- */

.studio-lab {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(300px, 0.94fr);
  margin: 30px 0;
  border: 1px solid var(--line);
  background: var(--surface);
}

.lab-visual {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: clamp(16px, 2.6vw, 26px);
  border-right: 1px solid var(--line);
  background: radial-gradient(circle at 50% 40%, rgba(199, 164, 106, 0.07), transparent 64%);
}

.studio-stage {
  display: block;
  width: 100%;
  max-width: 580px;
  height: auto;
  margin: 0 auto;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.lab-rings circle,
.lab-rings line {
  fill: none;
  stroke: rgba(241, 236, 223, 0.075);
  stroke-width: 1;
}

.lab-rings line {
  stroke: rgba(199, 164, 106, 0.24);
  stroke-dasharray: 3 8;
}

.lab-arc-path {
  fill: none;
  stroke: var(--gold);
  stroke-width: 1.4;
  stroke-dasharray: 4 5;
}

.lab-arc-text {
  fill: var(--gold-bright);
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.05em;
  text-anchor: middle;
}

.lab-subject circle {
  fill: rgba(241, 236, 223, 0.06);
  stroke: var(--gold);
  stroke-width: 1.3;
}

.lab-subject path {
  fill: none;
  stroke: rgba(199, 164, 106, 0.55);
  stroke-width: 1.2;
}

.lab-subject text,
.lab-fill text,
.lab-rim text,
.lab-key text,
.lab-camera text {
  fill: var(--faint);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-anchor: middle;
}

.lab-fill rect {
  fill: var(--bg);
  stroke: rgba(241, 236, 223, 0.5);
  stroke-width: 1.2;
}

.lab-rim-glow {
  fill: rgba(230, 195, 139, 0.15);
}

.lab-rim-core {
  fill: var(--gold-bright);
}

.lab-rim text {
  fill: var(--gold);
}

.lab-key {
  cursor: grab;
  outline: none;
}

.lab-key.is-dragging {
  cursor: grabbing;
}

.lab-key-glow {
  fill: rgba(199, 164, 106, 0.1);
}

.lab-key rect {
  fill: #27241c;
  stroke: var(--gold);
  stroke-width: 1.3;
}

.lab-key .lab-key-face {
  fill: var(--gold-bright);
  stroke: none;
}

.lab-key text {
  fill: var(--gold-bright);
}

.lab-key:focus-visible .lab-key-glow {
  fill: rgba(199, 164, 106, 0.18);
  stroke: var(--gold-bright);
  stroke-width: 1.6;
}

.lab-camera rect {
  fill: var(--bg);
  stroke: rgba(241, 236, 223, 0.34);
  stroke-width: 1.2;
}

.lab-camera .lab-lens {
  fill: rgba(199, 164, 106, 0.16);
  stroke: var(--gold);
}

.lab-stage-hint {
  fill: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-anchor: middle;
}

.lab-ref {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  align-items: end;
  gap: 16px;
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.lab-ref img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--line);
  background: #080806;
}

.lab-ref figcaption {
  display: grid;
  gap: 3px;
  padding-bottom: 2px;
}

.lab-ref .mono {
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.lab-ref strong {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.lab-ref figcaption > span:last-child {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.03em;
  line-height: 1.6;
}

.lab-panel {
  display: flex;
  flex-direction: column;
  gap: 17px;
  padding: clamp(20px, 3vw, 28px);
}

.lab-axis label,
.lab-axis > .lab-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.lab-axis output {
  color: var(--gold-bright);
  font-family: var(--mono);
  font-size: 12px;
}

.lab-hint {
  max-width: none;
  margin-top: 3px;
  color: var(--faint);
  font-size: 11px;
  line-height: 1.65;
}

.lab-axis--fill.is-disabled {
  opacity: 0.42;
}

.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.seg-btn {
  flex: 1 1 0;
  min-height: 36px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.seg-btn:hover {
  border-color: var(--gold);
  color: var(--ink);
}

.seg-btn.is-active {
  border-color: var(--gold);
  background: var(--gold-dim);
  color: var(--gold-bright);
}

.lab-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
  cursor: pointer;
}

.switch input {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 34px;
  height: 18px;
  margin: 0;
  border: 1px solid rgba(241, 236, 223, 0.24);
  border-radius: 999px;
  background-color: rgba(241, 236, 223, 0.06);
  background-image: radial-gradient(circle at center, var(--faint) 0 5px, transparent 5.5px);
  background-repeat: no-repeat;
  background-position: 2px center;
  background-size: 14px 14px;
  cursor: pointer;
  transition: background-color 0.2s ease, background-position 0.2s ease, border-color 0.2s ease;
}

.switch input:checked {
  border-color: var(--gold);
  background-color: var(--gold-dim);
  background-image: radial-gradient(circle at center, var(--gold-bright) 0 5px, transparent 5.5px);
  background-position: 18px center;
}

.switch input:focus-visible {
  outline: 1px solid var(--gold-bright);
  outline-offset: 3px;
}

.lab-readout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.lab-readout div {
  padding: 9px 12px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.lab-readout span {
  display: block;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.lab-readout strong {
  display: block;
  margin-top: 3px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
}

.lab-advice {
  max-width: none;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.lab-panel .presets {
  margin-top: auto;
}

/* ---------- Flash cards ---------- */

.flash-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 26px 0;
}

.flash-card {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
}

.flash-card img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.flash-card figcaption {
  padding: 18px 20px 20px;
}

.flash-card .mono {
  color: var(--gold);
}

.flash-card h3 {
  margin: 8px 0;
  font-family: var(--serif);
  font-size: 1.22rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.45;
}

.flash-card p {
  max-width: none;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

/* ---------- GN calculator ---------- */

.gn-lab {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  margin: 28px 0;
  border: 1px solid var(--line);
  background: var(--surface);
}

.gn-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 17px;
  padding: clamp(20px, 3vw, 28px);
  border-right: 1px solid var(--line);
}

.gn-field {
  min-width: 0;
}

.gn-field--wide {
  grid-column: 1 / -1;
}

.gn-field label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.gn-field output {
  color: var(--gold-bright);
  font-family: var(--mono);
  font-size: 12px;
}

.select {
  display: block;
  width: 100%;
  min-height: 38px;
  margin-top: 8px;
  padding: 8px 30px 8px 10px;
  border: 1px solid var(--line);
  border-radius: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(45deg, transparent 50%, var(--gold) 50%),
    linear-gradient(135deg, var(--gold) 50%, transparent 50%);
  background-repeat: no-repeat;
  background-position:
    calc(100% - 14px) calc(50% - 2px),
    calc(100% - 9px) calc(50% - 2px);
  background-size: 5px 5px, 5px 5px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 13px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.select:hover,
.select:focus {
  border-color: var(--gold);
  outline: none;
}

.select option {
  background: var(--bg);
  color: var(--ink);
}

.gn-readout {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: clamp(20px, 3vw, 28px);
  background: radial-gradient(circle at 80% 0%, rgba(199, 164, 106, 0.08), transparent 70%);
}

.gn-readout > .mono {
  color: var(--gold);
}

.gn-aperture {
  margin-top: 10px;
  color: var(--gold-bright);
  font-family: var(--serif);
  font-size: clamp(2.6rem, 5vw, 3.8rem);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 1;
}

.gn-exact {
  max-width: none;
  margin-top: 8px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  line-height: 1.6;
}

.gn-facts {
  display: grid;
  gap: 8px;
  width: 100%;
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.gn-facts div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.gn-facts dt {
  color: var(--faint);
  font-size: 12px;
  line-height: 1.6;
}

.gn-facts dd {
  margin: 0;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  text-align: right;
  line-height: 1.6;
}

.gn-facts dd.is-warn {
  color: #cf826e;
}

.gn-note {
  max-width: none;
  margin-top: 16px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.formula {
  max-width: none;
  margin: 22px 0 12px;
  padding: 16px 18px;
  border-left: 2px solid var(--gold);
  background: rgba(199, 164, 106, 0.05);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.9;
  overflow-x: auto;
}

.formula sup {
  color: var(--gold-bright);
}

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

@media (max-width: 1180px) {
  .studio-lab {
    grid-template-columns: minmax(0, 1fr);
  }

  .lab-visual {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .studio-stage {
    max-width: 460px;
  }

  .lab-ref {
    grid-template-columns: minmax(0, 190px) minmax(0, 1fr);
    gap: 16px;
  }

  .lab-ref img {
    aspect-ratio: 1 / 1;
  }
}

@media (max-width: 1000px) {
  .gn-lab {
    grid-template-columns: minmax(0, 1fr);
  }

  .gn-controls {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 760px) {
  .pattern-grid,
  .flash-grid,
  .compare-grid,
  .step-list.checklist {
    grid-template-columns: minmax(0, 1fr);
  }

  .step-list.checklist {
    gap: 0;
  }

  .ratio-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .ratio-bar {
    margin-top: 12px;
  }

  .ratio-ticks {
    font-size: 11px;
  }

  .gn-controls {
    grid-template-columns: minmax(0, 1fr);
  }

  .lab-ref {
    grid-template-columns: minmax(0, 150px) minmax(0, 1fr);
  }

  .lab-toggles {
    gap: 14px;
  }

  .step-list li {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 12px;
  }

  .lab-subject text,
  .lab-fill text,
  .lab-rim text,
  .lab-key text,
  .lab-camera text {
    font-size: 16px;
  }

  .lab-stage-hint {
    font-size: 14px;
  }

  .lab-arc-text {
    font-size: 17px;
  }
}

@media (max-width: 480px) {
  .lm-label,
  .lm-angle {
    font-size: 22px;
  }

  .lm-camera text,
  .lm-subject text {
    font-size: 20px;
  }

  .lab-subject text,
  .lab-fill text,
  .lab-rim text,
  .lab-key text,
  .lab-camera text {
    font-size: 21px;
  }

  .lab-stage-hint {
    font-size: 19px;
  }

  .lab-arc-text {
    font-size: 22px;
  }
}

@media (max-width: 460px) {
  .pattern-card figcaption,
  .flash-card figcaption {
    padding: 16px 16px 18px;
  }

  .compare-card,
  .ratio-lab {
    padding: 18px 16px;
  }

  .lab-visual,
  .lab-panel,
  .gn-controls,
  .gn-readout {
    padding: 16px;
  }

  .lab-ref {
    grid-template-columns: minmax(0, 1fr);
  }

  .lab-ref img {
    aspect-ratio: 4 / 5;
  }

  .lab-readout div {
    padding: 8px 9px;
  }

  .lab-panel .presets {
    gap: 6px;
  }
}