* {
  box-sizing: border-box;
}

html,
body,
#root {
  height: 100%;
  margin: 0;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  color: #1c2330;
  background: #f5f6f8;
}

.app {
  display: flex;
  flex-direction: column;
  height: 100%;
}

header {
  padding: 10px 18px 8px;
  border-bottom: 1px solid #dde1e7;
  background: #fff;
}

header h1 {
  margin: 0 0 2px;
  font-size: 19px;
}

header p {
  margin: 0;
  color: #5a6472;
}

a {
  color: #1667c2;
}

.columns {
  display: flex;
  flex: 1;
  min-height: 0;
}

aside {
  width: 340px;
  flex: none;
  overflow-y: auto;
  padding: 8px 16px 24px;
  background: #fff;
  border-right: 1px solid #dde1e7;
}

main {
  flex: 1;
  min-width: 0;
  position: relative;
}

section {
  margin-top: 14px;
}

section + section {
  padding-top: 12px;
  border-top: 1px solid #e7eaee;
}

section h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #5a6472;
  margin: 0 0 8px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

button,
.button {
  font: inherit;
  padding: 5px 12px;
  border: 1px solid #b9c0ca;
  border-radius: 6px;
  background: #f2f4f7;
  cursor: pointer;
  display: inline-block;
}

button:hover:not(:disabled),
.button:hover {
  background: #e6eaef;
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}

button.solve {
  width: 100%;
  padding: 8px;
  font-weight: 600;
  background: #1667c2;
  border-color: #1257a6;
  color: #fff;
}

button.solve:hover:not(:disabled) {
  background: #1257a6;
}

button.linkish {
  border: none;
  background: none;
  padding: 0;
  margin-top: 6px;
  color: #1667c2;
  text-decoration: underline;
}

.hint {
  color: #78818d;
  font-size: 12.5px;
  margin: 6px 0;
}

.status {
  color: #4a5462;
  font-size: 13px;
  margin: 8px 0 0;
}

.error {
  color: #b3261e;
  font-size: 13px;
  margin: 8px 0 0;
  white-space: pre-wrap;
}

.warn {
  color: #8a6d00;
  font-size: 12.5px;
  margin-top: 3px;
}

.meshinfo {
  margin-top: 10px;
  padding: 8px 10px;
  border: 1px solid #dde1e7;
  border-radius: 6px;
  background: #f8f9fb;
  font-size: 13px;
  min-height: 74px;
}

.meshinfo .status,
.meshinfo .error {
  margin: 0;
}

.placeholder {
  color: #9aa3af;
}

.field {
  display: block;
  margin: 10px 0;
}

.field > span {
  display: block;
  font-size: 12.5px;
  color: #4a5462;
  margin-bottom: 4px;
}

.field select,
.field input[type='text'] {
  font: inherit;
  width: 100%;
  padding: 5px 8px;
  border: 1px solid #b9c0ca;
  border-radius: 6px;
  background: #fff;
}

.field select:disabled,
.field input:disabled {
  background: #f2f4f7;
  border-color: #d3d8df;
  color: #9aa3af;
}

.field.inactive > span {
  color: #9aa3af;
}

.pde-note {
  min-height: 4.4em;
}

.solve-status {
  min-height: 42px;
}

.field input[type='range'] {
  width: 100%;
}

.preset-row {
  display: flex;
  gap: 6px;
}

.preset-row select {
  width: 110px;
  flex: none;
  color: #5a6472;
}

.preset-row input {
  flex: 1;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 13px;
}

details summary {
  cursor: pointer;
  font-size: 13px;
  color: #5a6472;
}

.console {
  max-height: 200px;
  overflow-y: auto;
  background: #14181f;
  color: #c7d0dc;
  font-size: 11.5px;
  padding: 8px;
  border-radius: 6px;
  white-space: pre-wrap;
  word-break: break-word;
}

.view-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #9aa3af;
  font-size: 15px;
}

.view-toolbar {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1;
  display: flex;
  gap: 0;
  border: 1px solid #b9c0ca;
  border-radius: 6px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.9);
}

.view-toolbar button {
  border: none;
  border-radius: 0;
  background: transparent;
  padding: 4px 10px;
  font-size: 12px;
  color: #5a6472;
}

.view-toolbar button + button {
  border-left: 1px solid #dde1e7;
}

/* separates the anaglyph toggle from the mutually-exclusive mode group */
.view-toolbar button.sep {
  border-left: 3px double #dde1e7;
}

.view-toolbar button:hover {
  background: #eef1f5;
}

.view-toolbar button.active {
  background: rgba(22, 103, 194, 0.12);
  color: #1257a6;
}