/* static/app.css */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-size: 14px;
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
  background: var(--bg);
}

.mobile-topbar,
.mobile-panel-overlay,
.mobile-close-btn {
  display: none;
}

/* --- Two-column grid layout --- */
.app-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  grid-template-rows: 100vh;
  height: 100vh;
  height: 100dvh;
  gap: 0;
  background: var(--bg);
}

/* --- Sidebar (left controls) --- */
.sidebar {
  background-color: transparent;
  border-right: none;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: flex-start;
  gap: 10px 12px;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
}

.sidebar-header > :first-child,
.sidebar-header-content {
  flex: 1 1 auto;
  min-width: 0;
}

.sidebar-header-content {
  display: flex;
  flex-direction: column;
  grid-column: 1;
  grid-row: 1;
  gap: 10px;
}

.sidebar-brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.app-brand-logo {
  display: block;
  flex: 0 0 auto;
  object-fit: contain;
}

.sidebar-brand-logo {
  width: 38px;
  height: 38px;
}

.sidebar-brand-copy {
  min-width: 0;
}

.sidebar-header h1 {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0;
}

.sidebar-header .subtitle {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.3;
  max-width: none;
}

.sidebar-header-buttons {
  display: flex;
  grid-column: 2;
  grid-row: 1;
  align-self: start;
  justify-content: flex-end;
  margin-left: auto;
  gap: 4px;
  flex: 0 0 auto;
}

.theme-toggle {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  color: var(--text);
  font-weight: 700;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

[data-theme="dark"] .theme-toggle {
  color: white;
}

.theme-toggle:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.theme-toggle:focus-visible {
  outline: none;
  border-color: color-mix(in srgb, var(--primary) 65%, var(--border));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 20%, transparent);
}

.theme-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  line-height: 1;
}

.theme-icon-svg {
  display: block;
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  pointer-events: none;
}

/* --- Section cards --- */
.section {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  padding: 10px;
}

.section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* --- Form controls --- */
.form-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 38px;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  min-width: 0;
}

.form-row label {
  font-size: 12px;
  color: var(--text);
  justify-self: start;
  min-width: 0;
}

.info-label {
  position: relative;
  width: max-content;
  max-width: 100%;
  cursor: pointer;
  border-bottom: none;
  transition: color 0.15s;
}

.info-label::after {
  content: "";
  position: absolute;
  left: 0;
  right: auto;
  bottom: -2px;
  width: 100%;
  border-bottom: 1px dashed transparent;
  transition: border-color 0.15s;
}

.info-label:hover {
  color: var(--primary);
}

.info-label:hover::after {
  border-bottom-color: var(--primary);
}

.form-row input[type="number"],
.form-row input[type="range"],
.form-row select,
.form-row .number-input-shell {
  min-width: 0;
}

.form-row > input[type="number"],
.form-row > input[type="range"],
.form-row > select,
.form-row > .number-input-shell {
  grid-column: 2 / 3;
}

.form-row > button {
  grid-column: 2 / 3;
  justify-self: start;
}

.form-row > input[type="number"]:last-child,
.form-row > input[type="range"]:last-child,
.form-row > select:last-child,
.form-row > .number-input-shell:last-child {
  grid-column: 2 / -1;
}

.form-row > .projection-toggle {
  grid-column: 2 / -1;
}

.form-row-full {
  grid-template-columns: minmax(0, 1fr);
}

.form-row-full > input[type="number"],
.form-row-full > input[type="range"],
.form-row-full > select,
.form-row-full > .number-input-shell,
.form-row-full > input[type="number"]:last-child,
.form-row-full > input[type="range"]:last-child,
.form-row-full > select:last-child,
.form-row-full > .number-input-shell:last-child {
  grid-column: 1 / -1;
}

input[type="number"] {
  background: var(--surface-alt);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 30px 5px 6px;
  font-size: 13px;
  font-family: inherit;
  width: 100%;
  -moz-appearance: textfield;
  appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.number-input-shell {
  position: relative;
  display: block;
  width: 100%;
  min-width: 0;
}

.number-input-shell input[type="number"] {
  padding-right: 30px;
}

.number-input-stepper {
  position: absolute;
  top: 4px;
  right: 4px;
  bottom: 4px;
  display: grid;
  grid-template-rows: 1fr 1fr;
  width: 22px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--border) 88%, transparent);
  border-radius: 5px;
  background: color-mix(in srgb, var(--surface) 88%, var(--surface-alt));
  box-shadow: inset 0 1px 0 color-mix(in srgb, white 6%, transparent);
}

.number-input-stepper button {
  display: grid;
  place-items: center;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
}

.number-input-stepper button + button {
  border-top: 1px solid color-mix(in srgb, var(--border) 82%, transparent);
}

.number-input-stepper button::before {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
}

.number-input-stepper-up::before {
  border-bottom: 5px solid currentColor;
}

.number-input-stepper-down::before {
  border-top: 5px solid currentColor;
}

.number-input-stepper button:hover {
  background: color-mix(in srgb, var(--primary) 16%, transparent);
  color: var(--primary);
}

.number-input-stepper button:active {
  background: color-mix(in srgb, var(--primary) 24%, var(--surface-alt));
}

.number-input-shell:focus-within .number-input-stepper {
  border-color: color-mix(in srgb, var(--primary) 48%, var(--border));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--primary) 16%, transparent);
}

.number-input-shell input[type="number"]:disabled + .number-input-stepper,
.number-input-shell input[type="number"][readonly] + .number-input-stepper {
  opacity: 0.45;
  pointer-events: none;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--primary);
}

select {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 6px;
  font-size: 13px;
  font-family: inherit;
  width: 100%;
  cursor: pointer;
}

select:focus {
  outline: none;
  border-color: var(--primary);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
}

.range-value {
  font-size: 12px;
  color: var(--text-muted);
  min-width: 38px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.unit-select {
  flex: 0 0 58px !important;
}

.btn-small {
  flex: 0 0 auto;
}

.form-row-spacing {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 58px 38px;
  align-items: center;
}

.form-row-spacing label {
  min-width: 0;
}

.form-row-spacing > input[type="number"],
.form-row-spacing > .number-input-shell {
  grid-column: 2 / 3;
}

.form-row-spacing > select {
  grid-column: 3 / 4;
}

.form-row-spacing > button {
  grid-column: 4 / 5;
}

.form-row-spacing input,
.form-row-spacing .number-input-shell,
.form-row-spacing select,
.form-row-spacing button {
  width: 100%;
}

.form-row-spacing .btn-small {
  padding: 3px 0;
}

.form-row-spacing .btn-small:disabled {
  background-color: color-mix(in srgb, var(--surface-alt) 82%, var(--border));
  border: 1px solid color-mix(in srgb, var(--border) 84%, var(--text-muted));
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 1;
}

.form-row-spacing .btn-small:disabled:hover {
  background-color: color-mix(in srgb, var(--surface-alt) 82%, var(--border));
}

.steering-presets {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 4px;
  margin: -2px 10px 8px 20px;
}

.steering-presets .btn-preset {
  background-color: color-mix(in srgb, var(--surface-alt) 72%, var(--border) 28%);
  color: var(--text-muted);
  border: 1px solid color-mix(in srgb, var(--border) 78%, var(--text-muted) 22%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  padding: 3px 0;
  min-width: 0;
}

.steering-presets .btn-preset:hover {
  background-color: var(--primary);
  border-color: var(--primary);
  color: var(--text-over-primary);
}

.btn-small {
  background-color: var(--primary);
  color: var(--text-over-primary);
  border: none;
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.btn-small:hover {
  background-color: var(--primary-hover);
}

.export-pattern-btn {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-family: var(--font-ui);
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease,
    box-shadow 0.15s ease, transform 0.15s ease;
}

#export-image-btn {
  background-color: var(--primary);
  border: 1px solid var(--primary);
  color: var(--text-over-primary);
  box-shadow: var(--shadow-sm);
}

#export-image-btn:hover:not(:disabled) {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-1px);
}

#image-config-btn {
  background-color: color-mix(in srgb, var(--surface-alt) 76%, var(--border) 24%);
  border: 1px solid color-mix(in srgb, var(--border) 82%, var(--text-muted) 18%);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

#image-config-btn:hover {
  background-color: color-mix(in srgb, var(--surface-alt) 62%, var(--border) 38%);
  border-color: var(--text-muted);
  color: var(--text);
  transform: translateY(-1px);
}

.form-row > .export-actions {
  grid-column: 2 / -1;
}

.export-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

.form-row > .desktop-feature-note {
  grid-column: 2 / -1;
  grid-row: 1;
}

.desktop-feature-note {
  margin: 0;
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.4;
}

.desktop-feature-note a {
  color: var(--primary);
}

.export-pattern-btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.plot-export-staging {
  position: fixed;
  top: 0;
  left: -10000px;
  width: 1600px;
  height: 1000px;
  pointer-events: none;
}

.btn-toggle {
  background-color: var(--border);
  color: var(--text-muted);
  border: none;
  border-radius: 4px;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.btn-toggle.active {
  background-color: var(--primary);
  color: var(--text-over-primary);
}

.btn-toggle:hover {
  opacity: 0.85;
}

.projection-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface-alt);
}

.projection-toggle-btn {
  min-width: 0;
  border: 0;
  border-radius: 4px;
  padding: 4px 6px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  font-family: inherit;
}

.projection-toggle-btn.active {
  background: var(--primary);
  color: var(--text-over-primary);
}

.projection-toggle-btn:hover {
  color: var(--text);
}

.projection-toggle-btn.active:hover {
  color: var(--text-over-primary);
}

/* Dynamic taper params container */
.taper-params {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}

.taper-params:empty {
  display: none;
}

/* --- Main center area --- */
.main-area {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: transparent;
  min-width: 0;
  padding-top: 12px;
  padding-left: 10px;
}

/* --- Metrics bar --- */
.metrics-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 0 12px;
  background-color: transparent;
  border-bottom: none;
}

.metric {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 8px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.metric:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.metric:focus-visible {
  outline: none;
  border-color: color-mix(in srgb, var(--primary) 65%, var(--border));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 20%, transparent);
}

.metric-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.3px;
  color: var(--text-muted);
}

.metric-value {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* --- Plot area --- */
.plot-area {
  flex: 1;
  position: relative;
  min-height: 0;
}

.plot-area > div {
  position: absolute;
  inset: 0;
}

.compute-error {
  position: absolute;
  inset: 16px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 8px;
  padding: 18px;
  border: 1px solid color-mix(in srgb, var(--accent-red) 55%, var(--border));
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent-red) 10%, var(--surface));
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.compute-error strong {
  font-family: var(--font-mono);
  color: var(--accent-red);
  letter-spacing: 0;
}

.compute-error span {
  color: var(--text-muted);
  line-height: 1.45;
}

.plot-workspace {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.plot-main-row {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  align-items: stretch;
  overflow: hidden;
}

.plot-resizer {
  width: 8px;
  flex: 0 0 8px;
  cursor: col-resize;
  background: linear-gradient(
    to right,
    transparent 0,
    transparent 2px,
    var(--border) 2px,
    var(--border) 6px,
    transparent 6px,
    transparent 100%
  );
}

.plot-resizer:hover,
.plot-resizer.dragging {
  background: linear-gradient(
    to right,
    transparent 0,
    transparent 2px,
    var(--primary) 2px,
    var(--primary) 6px,
    transparent 6px,
    transparent 100%
  );
}

.cuts-resizer {
  height: 8px;
  flex: 0 0 8px;
  cursor: row-resize;
  background: linear-gradient(
    to bottom,
    transparent 0,
    transparent 2px,
    var(--border) 2px,
    var(--border) 6px,
    transparent 6px,
    transparent 100%
  );
}

.cuts-resizer:hover,
.cuts-resizer.dragging {
  background: linear-gradient(
    to bottom,
    transparent 0,
    transparent 2px,
    var(--primary) 2px,
    var(--primary) 6px,
    transparent 6px,
    transparent 100%
  );
}

/* --- Detail panels --- */
.taper-panel {
  width: 340px;
  min-width: 260px;
  max-width: 55%;
  min-height: 0;
  overflow: hidden;
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border);
  background: var(--surface);
}

.taper-panel.collapsed {
  width: 52px;
  min-width: 52px;
}

.taper-panel.collapsed .taper-panel-header {
  justify-content: center;
  padding: 0;
}

.taper-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 38px;
  padding: 0 10px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  text-align: left;
}

.taper-panel-header:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--primary) 32%, transparent);
}

.taper-panel-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.taper-plot {
  flex: 1;
  min-height: 0;
  margin: 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: var(--surface-alt);
}

.cuts-panel {
  flex: 0 0 28vh;
  min-height: 190px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.cuts-panel.collapsed {
  flex-basis: 38px;
  min-height: 38px;
  overflow: hidden;
}

.cuts-collapsed-title {
  position: absolute;
  inset: 0 42px 0 10px;
  display: none;
  align-items: center;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  pointer-events: none;
}

.cuts-panel.collapsed .cuts-collapsed-title {
  display: inline-flex;
}

.taper-panel-header:hover .taper-panel-title,
.taper-panel-header:hover .taper-panel-chevron,
.cuts-collapse-btn:hover .cuts-panel-chevron {
  color: var(--primary);
}

.taper-panel-chevron,
.cuts-panel-chevron {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--surface-alt);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  line-height: 1;
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.cuts-collapse-btn {
  position: absolute;
  top: 4px;
  right: 6px;
  z-index: 2;
  width: 26px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
}

.cuts-collapse-btn:hover {
  background: color-mix(in srgb, var(--primary) 10%, transparent);
}

.cuts-collapse-btn:hover .cuts-panel-chevron,
.taper-panel-header:hover .taper-panel-chevron {
  border-color: color-mix(in srgb, var(--primary) 70%, var(--border));
  background: color-mix(in srgb, var(--primary) 12%, var(--surface-alt));
}

.cuts-panel.collapsed .cuts-collapse-btn {
  top: 7px;
}

.cuts-collapse-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 32%, transparent);
}

.taper-panel-content {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.cuts-panel-content {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 10px;
}

.taper-panel.collapsed .taper-panel-content,
.taper-panel.collapsed .taper-panel-title,
.cuts-panel.collapsed .cuts-panel-content {
  display: none;
}

.plot-resizer.hidden,
.cuts-resizer.hidden {
  display: none;
}

.cut-plot-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 0;
}

.cut-plot-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.cut-plot {
  flex: 1;
  height: auto;
  min-height: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  background: var(--surface-alt);
}

/* --- Info modal --- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px 28px;
  max-width: 680px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
  padding-right: 30px;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
}

.modal-close:hover {
  color: var(--primary);
}

.modal-body {
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

.modal-body .katex-display {
  margin: 16px 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.modal-body .katex-display > .katex {
  max-width: 100%;
}

.modal-body p {
  margin-bottom: 10px;
}

.modal-body .triangular-note {
  margin: 18px 0 0;
  padding: 10px 12px;
  border-left: 3px solid var(--primary);
  background: var(--surface-alt);
  color: var(--text-muted);
}

.modal-body .triangular-note p {
  margin: 0;
}

.modal.modal-wide {
  max-width: 760px;
}

.image-config-modal {
  max-width: 560px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  font-family: var(--font-ui);
}

.image-config-modal .modal-title {
  font-family: var(--font-mono);
  font-size: 17px;
  letter-spacing: -0.02em;
}

.image-config-modal button,
.image-config-modal input,
.image-config-modal select {
  font-family: var(--font-ui);
}

.image-config-form {
  display: grid;
  gap: 18px;
  color: var(--text);
}

.image-config-options {
  display: grid;
  gap: 8px;
}

.image-config-toggle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface-alt);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease,
    box-shadow 0.15s ease;
}

.image-config-toggle:hover {
  border-color: color-mix(in srgb, var(--border) 55%, var(--text-muted));
  box-shadow: var(--shadow-sm);
}

.image-config-toggle input {
  margin-top: 3px;
  width: 15px;
  height: 15px;
  accent-color: var(--primary);
}

.image-config-toggle span {
  display: grid;
  gap: 2px;
}

.image-config-toggle strong,
.image-config-field > span {
  font-size: 13px;
  color: var(--text);
}

.image-config-toggle small,
.image-config-field small {
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.35;
}

.image-config-field {
  display: grid;
  gap: 6px;
}

.image-config-field select {
  width: 100%;
  min-height: 34px;
  border-radius: 6px;
  background-color: var(--surface-alt);
}

.image-config-camera-fields {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface-alt);
}

.image-config-camera-fields[hidden] {
  display: none;
}

.image-config-camera-fields label {
  display: grid;
  gap: 5px;
  color: var(--text-muted);
  font-size: 11px;
}

.image-config-camera-fields input {
  width: 100%;
  min-width: 0;
  min-height: 34px;
  border-radius: 6px;
}

.image-config-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 4px;
}

.image-config-action-spacer {
  flex: 1;
}

.image-config-actions .btn-primary,
.image-config-actions > .btn-small {
  min-height: 34px;
  border-radius: 6px;
  font-family: var(--font-ui);
  font-weight: 700;
}

#image-config-reset,
#image-config-cancel {
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--text);
}

#image-config-reset:hover,
#image-config-cancel:hover {
  background-color: color-mix(in srgb, var(--surface-alt) 70%, var(--border) 30%);
  border-color: var(--text-muted);
  color: var(--text);
}

.image-config-actions .btn-primary {
  border: 1px solid var(--primary);
  box-shadow: var(--shadow-sm);
}

.video-embed {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  margin: 12px 0;
  border-radius: 6px;
  overflow: hidden;
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-top: 14px;
  margin-bottom: 2px;
}

.resource-list {
  list-style: none;
  padding: 0;
  margin: 4px 0 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.resource-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  font-size: 13px;
  line-height: 1.4;
}

.resource-list a {
  color: var(--accent-cyan);
  text-decoration: none;
}

.resource-list a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.resource-tag {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--text-muted);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* --- Scrollbar styling --- */
.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

/* --- Pair inputs (side by side) --- */
.form-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.form-pair .form-row {
  grid-template-columns: 30px minmax(0, 1fr);
  margin-bottom: 0;
}

.form-pair .form-row label {
  min-width: 0;
}

@media (max-width: 980px) {
  body {
    overflow: auto;
    min-height: 100dvh;
    height: auto;
  }

  body.mobile-panel-open {
    overflow: hidden;
  }

  .mobile-topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 10px;
    padding: calc(env(safe-area-inset-top, 0px) + 10px) 12px 10px;
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
  }

  .mobile-topbar-brand {
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .mobile-topbar-title {
    font-family: var(--font-mono);
    font-size: 15px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0;
  }

  .mobile-topbar-subtitle {
    font-size: 10px;
    color: var(--text-muted);
    white-space: nowrap;
  }

  .mobile-topbar-btn {
    min-height: 38px;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface-alt);
    color: var(--text);
    font: inherit;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
  }

  .mobile-panel-overlay {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 45;
    background: rgba(7, 10, 14, 0.42);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
  }

  .mobile-panel-overlay.active {
    opacity: 1;
    pointer-events: auto;
  }

  .app-layout {
    display: block;
    height: auto;
    min-height: calc(100dvh - 64px);
  }

  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    z-index: 50;
    width: min(86vw, 360px);
    max-width: 360px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
    transition: transform 0.24s ease;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .sidebar {
    left: 0;
    transform: translateX(-100%);
    border-right: 1px solid var(--border);
  }

  .sidebar.mobile-open {
    transform: translateX(0);
  }

  .mobile-close-btn {
    display: flex;
  }

  .sidebar-header {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--surface);
    padding-top: calc(env(safe-area-inset-top, 0px) + 6px);
  }

  .main-area {
    min-height: calc(100dvh - 64px);
    overflow-x: clip;
    overflow-y: visible;
    padding-top: 0;
    padding-left: 0;
  }

  .metrics-bar {
    position: static;
    z-index: 20;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow: visible;
    padding: 8px 12px;
  }

  .metric {
    min-width: 0;
  }

  .plot-workspace {
    display: flex;
    flex-direction: column;
    overflow: visible;
  }

  .plot-main-row {
    flex: 1 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: minmax(320px, 1fr) auto;
    overflow: visible;
  }

  .plot-area {
    min-height: 320px;
  }

  .plot-resizer,
  .cuts-resizer {
    display: none;
  }

  .cuts-panel.expanded {
    flex: 0 0 auto;
  }

  .taper-panel,
  .taper-panel.collapsed,
  .taper-panel.expanded,
  .cuts-panel,
  .cuts-panel.collapsed,
  .cuts-panel.expanded {
    width: auto;
    min-width: 0;
    max-width: none;
    border-left: none;
    border-top: 1px solid var(--border);
  }

  .taper-panel.collapsed,
  .cuts-panel.collapsed {
    flex-basis: auto;
    min-height: 38px;
  }

  .taper-panel.expanded {
    min-height: 300px;
  }

  .taper-panel.collapsed .taper-panel-title,
  .taper-panel.collapsed .taper-panel-content {
    display: none;
  }

  .taper-panel-header {
    padding: 12px;
  }

  .taper-panel-content,
  .cuts-panel-content {
    padding: 12px;
  }

  .cuts-panel-content {
    grid-template-columns: 1fr;
  }

  .cut-plot {
    height: 220px;
    min-height: 220px;
  }

  .taper-panel {
    min-height: 260px;
  }

  .taper-plot {
    min-height: 220px;
  }

  .modal {
    width: min(94vw, 640px);
    max-height: 84dvh;
    padding: 20px 18px;
  }
}

@media (max-width: 640px) {
  .modal-body .katex-display > .katex {
    font-size: 0.88em;
  }

  .metrics-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section {
    padding: 12px;
  }

  .form-pair {
    grid-template-columns: 1fr;
  }

  .image-config-camera-fields {
    grid-template-columns: 1fr;
  }

  .image-config-actions {
    flex-wrap: wrap;
  }

  .form-row > .export-actions {
    grid-column: 1;
  }

  .form-row > .desktop-feature-note {
    grid-column: 1;
    grid-row: auto;
  }

  .image-config-action-spacer {
    display: none;
  }

  .form-row,
  .form-row-spacing {
    grid-template-columns: 1fr;
    display: grid;
    gap: 6px;
    align-items: stretch;
    margin-bottom: 10px;
  }

  .form-row label,
  .form-row-spacing label {
    min-width: 0;
  }

  .form-row > input[type="number"],
  .form-row > input[type="range"],
  .form-row > select,
  .form-row > .number-input-shell,
  .form-row > input[type="number"]:last-child,
  .form-row > input[type="range"]:last-child,
  .form-row > select:last-child,
  .form-row > .number-input-shell:last-child {
    grid-column: 1;
  }

  .form-row > .projection-toggle {
    grid-column: 1;
  }

  .range-value {
    min-width: 0;
    text-align: left;
  }

  .unit-select,
  .form-row-spacing .btn-small {
    width: 100%;
  }

  .steering-presets {
    margin: 2px 0 10px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .btn-small,
  .btn-toggle,
  .theme-toggle,
  .mobile-topbar-btn {
    min-height: 40px;
  }

  input[type="number"],
  select {
    min-height: 40px;
    font-size: 16px;
  }

  .plot-main-row {
    grid-template-rows: minmax(280px, 1fr) auto;
  }

  .plot-area {
    min-height: 280px;
  }

  .cut-plot {
    height: 200px;
    min-height: 200px;
  }

  .resource-list li {
    flex-direction: column;
    align-items: flex-start;
  }
}