styles.css

/* Fonts are served from this site, not Google Fonts: no visitor data goes to a third party. */
@font-face {
  font-family: 'Instrument Sans';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('assets/fonts/instrument-sans.woff2') format('woff2');
}
@font-face {
  font-family: 'Instrument Serif';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('assets/fonts/instrument-serif.woff2') format('woff2');
}
:root {
  --bg: #e6e4dc;
  --panel: #f3f1ec;
  --ink: #23251f;
  --muted: #55584e; /* 4.8:1 on the stage, WCAG AA for small text */
  --line: #cdc9bd;
  --accent: #8f6700;
  --accent-ink: #ffffff;
  --stage: #d6d2c6;
  --track: #c9c5b8;
  color-scheme: light;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #22251f;
    --panel: #2c302a;
    --ink: #ebe7da;
    --muted: #a8aa9b;
    --line: #40453c;
    --accent: #e9b93a;
    --accent-ink: #1f1a0a;
    --stage: #191b17;
    --track: #4a5046;
    color-scheme: dark;
  }
}
:root[data-theme='dark'] {
  --bg: #22251f;
  --panel: #2c302a;
  --ink: #ebe7da;
  --muted: #a8aa9b;
  --line: #40453c;
  --accent: #e9b93a;
  --accent-ink: #1f1a0a;
  --stage: #191b17;
  --track: #4a5046;
  color-scheme: dark;
}
html {
  height: 100%;
  scroll-padding-top: env(safe-area-inset-top, 0px);
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Instrument Sans', 'Helvetica Neue', Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}
.app {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  min-height: 100vh;
}
.stage {
  background: var(--stage);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 28px;
  min-width: 0;
  position: relative;
}
@media (min-width: 861px) {
  /* the rail can be taller than the window: keep the painting centred in view while it scrolls */
  .stage {
    position: sticky;
    top: 0;
    height: 100vh;
    align-self: start;
  }
}
.stage.dragging {
  outline: 3px dashed var(--accent);
  outline-offset: -14px;
}
.frame {
  position: relative;
  display: inline-block;
  max-width: 100%;
  line-height: 0;
}
.frame.lit {
  transform: perspective(1100px) rotateX(calc(var(--ry, 0) * -4deg)) rotateY(calc(var(--rx, 0) * 4deg));
  box-shadow: calc(var(--rx, 0) * -5px) calc(18px + var(--ry, 0) * -5px) 40px -10px rgb(0 0 0 / 0.45);
}
.pic {
  position: absolute;
  inset: var(--iy, 0%) var(--ix, 0%);
  pointer-events: none;
}
[hidden] {
  display: none !important;
}
#paint,
#view {
  display: block;
  max-width: 100%;
  max-height: calc(100vh - 190px);
  width: auto;
  height: auto;
  background: #161a24;
}
#original {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
  transition: opacity 120ms ease;
}
#original.show {
  opacity: 1;
}
.status {
  font-size: 13px;
  color: var(--muted);
  min-height: 20px;
  text-align: center;
}
.bar {
  width: min(420px, 80%);
  height: 3px;
  background: var(--track);
  border-radius: 2px;
  overflow: hidden;
}
.bar > i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width 80ms linear;
}
.rail {
  background: var(--panel);
  border-left: 1px solid var(--line);
  padding: 32px 26px 28px;
  display: flex;
  flex-direction: column;
  gap: 26px;
}
h1 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-weight: 400;
  font-size: 46px;
  line-height: 0.95;
  margin: 0;
}
.lede {
  margin: 10px 0 0;
  color: var(--muted);
  max-width: 34ch;
}
.group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.group h2 {
  font-size: 13px;
  font-weight: 600;
  margin: 0;
  color: var(--ink);
}
.ctl {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 2px 12px;
}
.ctl label {
  font-size: 14px;
}
.ctl output {
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.ctl input[type='range'] {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--accent);
  margin: 2px 0 0;
}
.ctl select {
  grid-column: 1 / -1;
  font: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 8px;
}
.hint {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
}
button,
.filebtn {
  font: inherit;
  font-weight: 500;
  font-size: 14px;
  border-radius: 6px;
  padding: 9px 14px;
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  text-align: center;
}
button.primary,
.filebtn.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}
button:disabled {
  opacity: 0.5;
  cursor: default;
}
button:focus-visible,
.filebtn:focus-within,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.row > * {
  flex: 1 1 auto;
}
.filebtn input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}
.filebtn {
  position: relative;
  display: inline-block;
}
.linkbtn {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  text-decoration: underline;
  font-size: 13px;
  text-align: left;
}
.foot {
  margin-top: auto;
  font-size: 12px;
  color: var(--muted);
}
@media (max-width: 860px) {
  .app {
    grid-template-columns: 1fr;
  }
  .rail {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  #paint,
  #view {
    max-height: 68vh;
  }
  .tools {
    width: 100%;
    flex-wrap: nowrap;
  }
  .tools button {
    flex: 1 1 auto;
    padding: 9px 6px;
    font-size: 13.5px;
    white-space: nowrap;
  }
  .stage {
    padding: 18px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .bar > i,
  #original {
    transition: none;
  }
}

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.preset {
  flex: 0 0 auto;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 13.5px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}
.preset[aria-checked='true'],
.preset[aria-pressed='true'] {
  background: var(--ink);
  color: var(--panel);
  border-color: var(--ink);
}

.tools {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}
.filebtn.primary {
  display: block;
  padding: 11px 14px;
  font-size: 15px;
}
.seg {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  padding: 3px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 9px;
}
.seg button {
  border: 0;
  background: transparent;
  padding: 7px 0;
  border-radius: 6px;
}
.seg button[aria-checked='true'] {
  background: var(--ink);
  color: var(--panel);
}
.confirm {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}
.check input {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
  margin: 0;
}
.fine {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.fine > summary {
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
.fine[open] > summary {
  margin-bottom: 18px;
}
.fine > .group + .group {
  margin-top: 22px;
}
.fine h3 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0;
}

.head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}
button.icon {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: transparent;
  color: var(--ink);
}
button.icon svg {
  width: 18px;
  height: 18px;
}