:root {
  color-scheme: dark;
  --page-bg: #0b0d10;
  --panel: #101317;
  --panel-border: #232a33;
  --ink: #edf2f8;
  --muted: #98a4b3;
  --control-bg: #151a21;
  --control-border: #2a323d;
  --canvas-bg: #05070b;
  --canvas-border: #252d38;
  --draw-soft: rgba(255, 255, 255, 0.2);
  --draw-mid: rgba(255, 255, 255, 0.65);
  --draw-guide: rgba(255, 255, 255, 0.35);
  --draw-reference: rgba(111, 184, 255, 0.46);
  --draw-bridge-debug: #ff4d4d;
  --draw-line: #ffffff;
}

body[data-theme="light"] {
  color-scheme: light;
  --page-bg: #eeece8;
  --panel: #f8f7f3;
  --panel-border: #d7d2c8;
  --ink: #111315;
  --muted: #5f656d;
  --control-bg: #f2efe9;
  --control-border: #cec8bc;
  --canvas-bg: #ffffff;
  --canvas-border: #cfd4da;
  --draw-soft: rgba(10, 14, 20, 0.22);
  --draw-mid: rgba(10, 14, 20, 0.72);
  --draw-guide: rgba(10, 14, 20, 0.4);
  --draw-reference: rgba(21, 88, 169, 0.5);
  --draw-bridge-debug: #d83a3a;
  --draw-line: #0b0e13;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100dvh;
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  background: var(--page-bg);
  color: var(--ink);
}

header,
main {
  width: 100%;
  margin: 0;
}

header {
  padding: 0.7rem 0.7rem 0;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10;
}

h1,
h2,
p,
figure {
  margin: 0;
}

#top {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: flex-start;
  justify-content: flex-start;
}

fieldset {
  margin: 0;
  border: 1px solid var(--panel-border);
  border-radius: 0.5rem;
  padding: 0.45rem 0.5rem;
  min-height: 2.8rem;
  height: 2.8rem;
  background: color-mix(in srgb, var(--panel) 90%, transparent);
  backdrop-filter: blur(8px);
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  justify-content: flex-start;
  align-content: center;
}

.input-controls,
.animation-controls {
  flex-wrap: nowrap;
  align-items: center;
}

.animation-controls label,
.animation-controls output {
  display: inline-flex;
  align-items: center;
  line-height: 1;
}

label,
output,
button,
select,
input {
  font: inherit;
  color: var(--ink);
}

label,
output,
button,
select,
input[type="file"] {
  display: inline-flex;
  align-items: center;
  line-height: 1;
  vertical-align: middle;
}

button,
select,
input[type="file"],
input[type="range"] {
  border: 1px solid var(--control-border);
  background: var(--control-bg);
  border-radius: 0.4rem;
}

button {
  padding: 0.28rem 0.5rem;
  cursor: pointer;
}

select {
  padding: 0.23rem 0.38rem;
}

input[type="file"] {
  min-height: 1.95rem;
}

#sample-shape-select {
  width: 10ch;
  max-width: 10ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#theme-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.theme-switch {
  position: relative;
  display: inline-flex;
  cursor: pointer;
}

.theme-slider {
  width: 3.35rem;
  height: 1.85rem;
  border-radius: 999px;
  border: 1px solid var(--control-border);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--control-bg) 88%, white 12%),
    var(--control-bg)
  );
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0.43rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.theme-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.05rem;
  height: 1.05rem;
  line-height: 1;
  color: var(--muted);
  transition:
    opacity 170ms ease,
    transform 170ms ease;
}

.theme-icon-svg {
  width: 100%;
  height: 100%;
}

#theme-toggle:checked + .theme-slider .moon,
#theme-toggle:not(:checked) + .theme-slider .sun {
  color: var(--ink);
}

#theme-toggle:checked + .theme-slider .moon {
  opacity: 0.95;
  transform: scale(1);
}

#theme-toggle:checked + .theme-slider .sun {
  opacity: 0.32;
  transform: scale(0.92);
}

#theme-toggle:not(:checked) + .theme-slider .moon {
  opacity: 0.32;
  transform: scale(0.92);
}

#theme-toggle:not(:checked) + .theme-slider .sun {
  opacity: 0.95;
  transform: scale(1);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

input[type="file"] {
  max-width: 9rem;
  padding: 0.2rem;
}

input[type="range"] {
  width: 4.5rem;
}

.draw-only[hidden] {
  display: none !important;
}

#status {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.85rem;
}

#status:empty {
  display: none;
}

main {
  flex: 1 1 0;
  min-height: 0;
  padding: 0;
  display: flex;
}

section,
aside {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
}

section {
  height: 100%;
  display: flex;
  flex-direction: column;
  width: 100%;
}

aside {
  display: grid;
  gap: 0.75rem;
}

figure {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
}

canvas {
  flex: 1 1 0;
  min-height: 0;
  height: 100%;
  width: 100%;
  display: block;
  border-radius: 0;
  background: var(--canvas-bg);
  border: none;
}

@media (max-width: 980px) {
  header {
    position: static;
    padding: 0.5rem;
  }

  main {
    padding-bottom: 0;
  }

  fieldset {
    width: 100%;
    height: auto;
    flex-wrap: wrap;
  }
}