/*
 * Styles of the demo's panel and page.
 *
 * The panel part (.gui…) is adapted from guspira's css/gui.css and the page
 * part (#panel, #buttons, .icon-button, body.ui-hidden, the phone layout) from
 * css/styles.css of bumpy-metaballs-2026, both by Jaume Sanchez (@thespite):
 *
 *   https://github.com/spite/guspira                 MIT License, Copyright (c) 2026 Jaume Sanchez
 *   https://github.com/spite/bumpy-metaballs-2026    MIT License, Copyright (c) 2022 thespite
 *
 *   Permission is hereby granted, free of charge, to any person obtaining a copy
 *   of this software and associated documentation files (the "Software"), to deal
 *   in the Software without restriction, including without limitation the rights
 *   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *   copies of the Software, and to permit persons to whom the Software is
 *   furnished to do so, subject to the following conditions:
 *
 *   The above copyright notice and this permission notice shall be included in all
 *   copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 *   SOFTWARE.
 *
 * The group list, the key table, the toast and the native range slider are this
 * demo's own.
 */

/* ------------------------------------------------------------------ page */
:root {
  color-scheme: dark;
  --accent: #ffa683;
}

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

html,
body {
  width: 100%;
  height: 100%;
}

body {
  color: #eee;
  font-family: "DM Sans", system-ui, sans-serif;
  font-size: 13px;
  line-height: 1.4em;
  text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.5);
  background-color: #03030a;
  overflow: hidden;
}

#container {
  position: absolute;
  inset: 0;
  touch-action: none;
}

#container canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

a {
  color: white;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.5);
}

[hidden] {
  display: none !important;
}

#panel {
  position: fixed;
  top: calc(10px + env(safe-area-inset-top, 0px));
  right: 10px;
  z-index: 2;
  width: 380px;
  max-width: calc(100vw - 20px);
}

#buttons {
  position: fixed;
  top: calc(10px + env(safe-area-inset-top, 0px));
  right: calc(10px + 380px + 8px);
  z-index: 2;
  display: flex;
  gap: 8px;
}

/* 65px is the folded panel's height (20px padding either side of a 24px
   title, plus a pixel of its rows), so the buttons line up with it. */
.icon-button {
  display: grid;
  place-items: center;
  width: 65px;
  height: 65px;
  border: none;
  border-radius: 6px;
  background: #2c2c2c;
  color: #e0e0e0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.icon-button:hover {
  background: #3e3e3e;
  color: #fff;
}

.icon-button:active {
  background: #333;
}

.icon-button:focus-visible {
  outline: 2px solid #888;
  outline-offset: 2px;
}

.icon-button[aria-pressed="true"] .when-off,
.icon-button[aria-pressed="false"] .when-on {
  display: none;
}

#randomize svg {
  transition: transform 0.35s ease;
}

#randomize.turned svg {
  transform: rotate(180deg);
}

/* The toggle stays, alone in the corner, or nothing could bring the rest back. */
body.ui-hidden #panel,
body.ui-hidden #buttons > :not(#ui-toggle),
body.ui-hidden #toast {
  display: none;
}

body.ui-hidden #buttons {
  right: 10px;
}

body.ui-hidden #ui-toggle {
  opacity: 0.4;
}

body.ui-hidden #ui-toggle:hover,
body.ui-hidden #ui-toggle:focus-visible {
  opacity: 1;
}

/* Status pills, top left: generating, saved, link copied; errors in red. */
#status-area {
  position: fixed;
  z-index: 3;
  left: 10px;
  top: calc(10px + env(safe-area-inset-top, 0px));
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  max-width: min(40em, calc(100vw - 20px));
  pointer-events: none;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  font-size: 12px;
  line-height: 1.35;
}

#error {
  border-radius: 8px;
  background: rgba(70, 10, 12, 0.92);
  color: #ffd9d3;
  overflow-wrap: anywhere;
  pointer-events: auto;
}

@media (prefers-reduced-motion: reduce) {
  #randomize svg {
    transition: none;
  }
}

/* Touch devices leave fullscreen with the system gesture or a double tap. */
@media (hover: none) and (pointer: coarse) {
  #fullscreen[aria-pressed="true"] {
    display: none;
  }
}

/* ------------------------------------------------------------------ panel */
.gui {
  --gui-bg: #2c2c2c;
  --gui-fg: #e0e0e0;
  --gui-muted: #888;
  --gui-field-bg: #3e3e3e;
  --gui-border: #555;
  --gui-focus: #888;
  --gui-accent: #ffffff;
  --gui-btn-bg: #4a4a4a;
  --gui-btn-hover: #5a5a5a;
  --gui-btn-active: #333333;
  --gui-track: #333333;
  --gui-fill: #e0e0e0;
  --gui-thumb: #ffffff;
  --gui-check: var(--gui-bg);
  --gui-font: "DM Sans", system-ui, sans-serif;
  --gui-font-size: 13px;
  --gui-padding: 20px;
  --gui-gap: 8px;
  --gui-row-height: 24px;
  --gui-label-width: 140px;
  --gui-radius: 4px;
  --gui-panel-radius: 6px;
  --gui-check-size: 16px;
  --gui-track-height: 4px;
  --gui-warn: #ff6b4a;
  --gui-max-height: calc(100vh - 80px);
  position: relative;
  background-color: var(--gui-bg);
  color: var(--gui-fg);
  font-family: var(--gui-font);
  font-size: var(--gui-font-size);
  padding: var(--gui-padding);
  border-radius: var(--gui-panel-radius);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  user-select: none;
  display: none;
}

.gui.visible {
  display: block;
}

.gui-title,
.gui-section-title {
  appearance: none;
  -webkit-appearance: none;
  background: none;
  border: none;
  border-radius: 0;
  padding: 0;
  width: 100%;
  text-align: left;
  font-family: inherit;
  color: inherit;
}

.gui-title:focus-visible,
.gui-section-title:focus-visible,
.gui-tab-btn:focus-visible {
  outline: 2px solid var(--gui-focus);
  outline-offset: 2px;
}

.gui-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  min-height: 24px;
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
}

.gui-title-text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gui-title-preset {
  font-weight: 400;
  color: var(--accent);
}

.gui-title-preset:not(:empty)::before {
  content: " · ";
}

/* guspira draws its chevron as an SVG; here it is two borders, so the JS builds no SVG. */
.gui-chevron {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  transition: transform 150ms ease-in-out;
}

.gui-chevron::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
}

.gui-section-title .gui-chevron {
  width: 10px;
  height: 10px;
}

.gui-section-title .gui-chevron::before {
  width: 5px;
  height: 5px;
}

.gui.collapsed .gui-title > .gui-chevron {
  transform: rotate(-90deg);
}

.gui-scroller {
  max-height: var(--gui-max-height);
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
}

.gui-scroller::-webkit-scrollbar {
  display: none;
}

.gui-rows {
  display: flex;
  flex-direction: column;
  gap: var(--gui-gap);
  height: 0;
  overflow: hidden;
  opacity: 0;
  border-top: 1px solid var(--gui-muted);
  transition: opacity 100ms ease-in-out;
}

.gui-rows.visible {
  height: auto;
  overflow: visible;
  margin-top: 12px;
  padding-top: 12px;
  opacity: 1;
}

.gui-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--gui-gap);
  min-height: var(--gui-row-height);
}

.gui-row.disabled {
  pointer-events: none;
  opacity: 0.5;
}

.gui-label {
  opacity: 0.8;
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* A label that rerolls its control when clicked says so on hover (guspira). */
.gui-label.gui-randomizable {
  cursor: pointer;
  text-decoration: underline dotted transparent;
  text-underline-offset: 3px;
  transition: text-decoration-color 120ms ease-in-out, opacity 120ms ease-in-out;
}

.gui-label.gui-randomizable:hover {
  opacity: 1;
  text-decoration-color: var(--gui-muted);
}

.gui-section.disabled {
  pointer-events: none;
  opacity: 0.5;
}

:where(.gui) :where(input, select, button, textarea) {
  box-sizing: border-box;
  height: var(--gui-row-height);
  background: var(--gui-field-bg);
  border: 1px solid var(--gui-border);
  color: var(--gui-fg);
  padding: 0 6px;
  border-radius: var(--gui-radius);
  font-size: 12px;
  font-family: inherit;
  line-height: 1;
  outline: none;
}

.gui input:focus,
.gui select:focus,
.gui button:focus-visible {
  border-color: var(--gui-focus);
}

.gui button:disabled {
  opacity: 0.45;
  cursor: default;
}

.gui input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: 0 0 auto;
  width: var(--gui-check-size);
  height: var(--gui-check-size);
  padding: 0;
  border: 1px solid var(--gui-border);
  border-radius: var(--gui-radius);
  background: var(--gui-field-bg);
  cursor: pointer;
}

.gui input[type="checkbox"]:checked {
  background: var(--gui-accent);
  border-color: var(--gui-accent);
}

.gui input[type="checkbox"]::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 46%;
  width: 0.3em;
  height: 0.62em;
  border: solid var(--gui-check);
  border-width: 0 2px 2px 0;
  transform: translate(-50%, -50%) rotate(45deg) scale(0.6);
  opacity: 0;
  transition: opacity 90ms ease-in-out, transform 90ms ease-in-out;
}

.gui input[type="checkbox"]:checked::after {
  opacity: 1;
  transform: translate(-50%, -50%) rotate(45deg) scale(1);
}

.gui-control,
.gui-select,
.gui-input-text,
.gui-color {
  flex: 0 0 calc(100% - var(--gui-label-width));
  min-width: 0;
}

.gui-color {
  padding: 0;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.gui-color::-webkit-color-swatch-wrapper {
  padding: 2px;
}

.gui-color::-webkit-color-swatch {
  border: none;
  border-radius: 2px;
}

.gui-segmented {
  display: flex;
}

.gui-segment {
  flex: 1 1 0;
  min-width: 0;
  font-size: 11px;
  color: var(--gui-muted);
  cursor: pointer;
  border-radius: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gui-segment + .gui-segment {
  margin-left: -1px;
}

.gui-segment:first-child {
  border-radius: var(--gui-radius) 0 0 var(--gui-radius);
}

.gui-segment:last-child {
  border-radius: 0 var(--gui-radius) var(--gui-radius) 0;
}

.gui-segment:hover {
  color: var(--gui-fg);
}

.gui-segment.active {
  background: var(--gui-btn-bg);
  color: var(--gui-fg);
  border-color: var(--gui-focus);
  position: relative;
  z-index: 1;
}

.gui-row.gui-row-block {
  flex-direction: column;
  align-items: stretch;
  gap: 3px;
}

.gui-btn {
  width: 100%;
  cursor: pointer;
  background: var(--gui-btn-bg);
}

.gui-btn:hover {
  background: var(--gui-btn-hover);
}

.gui-btn:active {
  background: var(--gui-btn-active);
}

.gui-btn-group {
  display: flex;
  gap: 4px;
  flex: 1 1 auto;
  min-width: 0;
}

.gui-btn-group .gui-btn {
  flex: 1 1 0;
  width: auto;
  min-width: 0;
}

.gui-btn-group .gui-btn-mini {
  flex: 0 0 auto;
  padding: 0 9px;
}

/* The preset row: ← select →, the select taking what is left. */
.gui-row.gui-compact {
  gap: 4px;
}

.gui-row.gui-compact > .gui-select,
.gui-row.gui-compact > .gui-input-text {
  flex: 1 1 auto;
}

.gui-row.gui-compact > .gui-btn-mini {
  flex: 0 0 auto;
  width: auto;
  padding: 0 9px;
}

/* Four color swatches sharing the control column. */
.gui-colors {
  display: flex;
  gap: 4px;
}

.gui-colors .gui-color {
  flex: 1 1 0;
  min-width: 0;
}

.gui-monitor {
  flex: 0 0 auto;
  opacity: 0.7;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  text-align: right;
}

.gui-monitor.gui-over {
  color: var(--gui-warn);
  opacity: 1;
}

.gui-slider-container {
  display: flex;
  align-items: center;
  gap: var(--gui-gap);
  flex: 0 0 calc(100% - var(--gui-label-width));
  min-width: 0;
}

/* A native range styled like guspira's: a thin track filled up to the thumb. */
.gui input[type="range"].gui-slider {
  flex: 1 1 auto;
  min-width: 0;
  height: var(--gui-row-height);
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  --fill: 50%;
}

.gui-slider::-webkit-slider-runnable-track {
  height: var(--gui-track-height);
  border-radius: 2px;
  background: linear-gradient(to right, var(--gui-fill) var(--fill), var(--gui-track) var(--fill));
}

.gui-slider::-moz-range-track {
  height: var(--gui-track-height);
  border-radius: 2px;
  background: linear-gradient(to right, var(--gui-fill) var(--fill), var(--gui-track) var(--fill));
}

.gui-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  margin-top: -4px;
  border-radius: 50%;
  background: var(--gui-thumb);
  border: none;
}

.gui-slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gui-thumb);
  border: none;
}

.gui-slider-val,
.gui-slider-edit {
  flex: 0 0 auto;
  width: 52px;
  text-align: right;
  opacity: 0.7;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.gui-slider-val {
  cursor: text;
}

.gui-slider-val:hover {
  opacity: 1;
}

.gui .gui-slider-edit {
  opacity: 1;
  padding: 2px 4px;
}

.gui-text {
  width: 100%;
  opacity: 0.75;
  line-height: 1.4;
  font-size: 12px;
  white-space: normal;
}

.gui-text a {
  color: inherit;
}

.gui-row:has(.gui-separator) {
  min-height: 12px;
  height: 12px;
}

.gui-separator {
  background: var(--gui-muted);
  opacity: 0.5;
  height: 1px;
  width: 100%;
}

.gui-tabbar {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  margin-top: 4px;
}

.gui-tab-btn {
  flex: 1 1 auto;
  min-width: 46px;
  padding: 5px 4px;
  font-size: 11px;
  background: var(--gui-field-bg);
  border: 1px solid var(--gui-border);
  border-bottom: none;
  border-radius: var(--gui-radius) var(--gui-radius) 0 0;
  color: var(--gui-muted);
  cursor: pointer;
}

.gui-tab-btn:hover {
  color: var(--gui-fg);
}

.gui-tab-btn.active {
  background: var(--gui-bg);
  color: var(--gui-fg);
}

.gui-tab-panel {
  display: none;
}

.gui-tab-panel.active {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.gui-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.gui-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--gui-muted);
}

.gui-section-title.gui-collapsible {
  cursor: pointer;
}

.gui-section-title.gui-collapsible:hover {
  color: var(--gui-fg);
}

.gui-section:not(.open) .gui-section-title .gui-chevron {
  transform: rotate(-90deg);
}

.gui-section-body {
  display: flex;
  flex-direction: column;
  gap: var(--gui-gap);
}

.gui-section:not(.open) > .gui-section-body {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .gui-rows,
  .gui-chevron {
    transition: none;
  }
}

/* ------------------------------------------------------------------ the demo's own rows */
.group-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.group-list li {
  display: flex;
  gap: 3px;
}

.group-list .group-pick {
  flex: 1 1 auto;
  min-width: 0;
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
  background: var(--gui-field-bg);
}

.group-list .group-eye {
  flex: 0 0 auto;
  width: 64px;
  font-size: 11px;
  color: var(--gui-muted);
  cursor: pointer;
}

.group-list li.active .group-pick {
  border-color: var(--gui-fg);
  color: #fff;
}

.group-list li.off .group-pick {
  opacity: 0.5;
}

/* The stats rows, as bumpy-metaballs': the reading in bold, its range dimmed. */
#panel .stat-value {
  flex: 0 0 auto;
  margin-left: auto;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  font-variant-numeric: tabular-nums;
}

#panel .stat-value.stat-warn {
  color: #ff6b5a;
}

#panel .stat-range {
  flex: 0 0 7.5em;
  white-space: nowrap;
  text-align: right;
  font-size: 11px;
  opacity: 0.5;
  font-variant-numeric: tabular-nums;
}

/* The help at the top of the panel, as bumpy-metaballs' #help. */
#help {
  font-size: 12px;
  line-height: 1.45;
  opacity: 0.85;
}

#help p {
  margin-bottom: 8px;
}

#help .credits {
  opacity: 0.7;
}

.keys {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.keys td {
  padding: 2px 0;
  vertical-align: top;
  opacity: 0.8;
}

.keys td:first-child {
  width: 96px;
  opacity: 1;
  white-space: nowrap;
}

kbd {
  display: inline-block;
  min-width: 1.6em;
  padding: 0 4px;
  border: 1px solid var(--gui-border, #555);
  border-radius: 3px;
  font: 11px/16px ui-monospace, monospace;
  text-align: center;
  text-shadow: none;
}

/* ------------------------------------------------------------------ phones */
@media (max-width: 600px) {
  #panel {
    width: auto;
    max-width: none;
    top: auto;
    bottom: calc(10px + env(safe-area-inset-bottom, 0px));
    left: 10px;
    right: 10px;
  }

  #panel .gui {
    --gui-max-height: 60vh;
    --gui-padding: 14px;
    --gui-label-width: 120px;
  }

  #buttons {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
  }

  .icon-button {
    width: 52px;
    height: 52px;
  }

  body.ui-hidden #buttons {
    left: auto;
    right: 10px;
    transform: none;
  }

  #status-area {
    left: 50%;
    top: calc(10px + env(safe-area-inset-top, 0px) + 60px);
    transform: translateX(-50%);
    align-items: center;
  }
}