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

:root {
  --bg: #d4d0c8;
  --panel-bg: rgba(236, 233, 226, 0.96);
  --panel-border: rgba(0,0,0,0.18);
  --accent: #0057d8;
  --text: #222;
  --text-dim: #777;
  --text-bright: #000;
  --panel-w: 220px;
  --radius: 4px;
}

html, body {
  width: 100%; height: 100%;
  font-family: 'IBM Plex Sans', sans-serif;
  color: var(--text);
  overflow: hidden;
  background-color: #1a1a1a;
}

canvas { display: block; }

/* ── FLOATING PANEL ── */
#panel {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--panel-w);
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  z-index: 200;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.4), 0 1px 0 rgba(255,255,255,0.8) inset;
  user-select: none;
}

#panel-header {
  display: flex;
  flex-direction: column;
  padding: 10px 14px 8px;
  border-bottom: 1px solid var(--panel-border);
  cursor: grab;
  background: linear-gradient(to bottom, #2a2a2a, #1e1e1e);
  border-radius: 4px 4px 0 0;
}

#panel-header:active { cursor: grabbing; }

.panel-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.panel-title {
  font-size: 15px;
  font-weight: 300;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #f0f0f0;
}

.panel-minimize {
  width: 22px; height: 22px;
  border-radius: 3px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s;
}

.panel-minimize:hover { background: rgba(255,255,255,0.12); }
.panel-minimize svg { display: block; }

.panel-byline {
  font-size: 10px;
  color: rgba(255,255,255,0.3);
  letter-spacing: 0.03em;
}

.panel-byline a { color: rgba(255,255,255,0.45); }

#panel-body {
  overflow-y: auto;
  overflow-x: hidden;
  max-height: calc(100vh - 80px);
  transition: max-height 0.25s ease, opacity 0.2s ease;
  opacity: 1;
}

#panel-body.collapsed {
  max-height: 0;
  opacity: 0;
}

/* ── SECTIONS ── */
.section {
  border-bottom: 1px solid var(--panel-border);
}

.section:last-child { border-bottom: none; }

.section-label {
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 8px 12px;
  margin-bottom: 0;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  outline: none;
  user-select: none;
}

.section-label::-webkit-details-marker { display: none; }

.section-label::after {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5'%3E%3Cpath d='M0 0l4 5 4-5z' fill='%23999'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

details[open] > .section-label::after {
  transform: rotate(180deg);
}

.section-content {
  padding: 0 12px 8px;
}

/* plain (non-details) section gets its own padding */
div.section {
  padding: 8px 12px;
}

/* ── CONTROL ROWS ── */
.ctrl {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 5px;
  gap: 5px;
}

.ctrl:last-child { margin-bottom: 0; }

/* toggles laid out 2 across, 2 down */
.ctrl-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px 14px;
  margin-bottom: 5px;
}

.ctrl-grid .ctrl { margin-bottom: 0; }

.ctrl-label {
  font-size: 12px;
  color: var(--text);
  white-space: nowrap;
  min-width: 42px;
  letter-spacing: 0.04em;
}

.ctrl-val {
  font-size: 11px;
  color: var(--accent);
  width: 28px;
  flex-shrink: 0;
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  overflow: hidden;
}

/* ── TEXTAREA ── */
textarea {
  flex: 1;
  width: 100%;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  color: var(--text-bright);
  background: linear-gradient(to bottom, #f4f4f4, #e8e8e8);
  border: 1px solid #bbb;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.12), 0 1px 0 rgba(255,255,255,0.7);
  border-radius: var(--radius);
  padding: 6px 8px;
  outline: none;
  resize: vertical;
  line-height: 1.5;
}

textarea:focus {
  border-color: rgba(0,87,216,0.5);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.1), 0 0 0 2px rgba(0,87,216,0.12);
}

/* ── SELECT ── */
select {
  -webkit-appearance: none;
  appearance: none;
  background: linear-gradient(to bottom, #f4f4f4, #e8e8e8);
  border: 1px solid #bbb;
  box-shadow: 0 1px 2px rgba(0,0,0,0.12), 0 1px 0 rgba(255,255,255,0.7) inset;
  color: var(--text-bright);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 4px 24px 4px 8px;
  border-radius: var(--radius);
  cursor: pointer;
  flex: 1;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23444'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 9px center;
  outline: none;
}

select:focus { border-color: rgba(0,87,216,0.35); }

/* ── RANGE ── */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 4px;
  background: linear-gradient(to right, #1a60e8 var(--fill, 0%), #b8b8b8 var(--fill, 0%));
  border-radius: 2px;
  border: 1px solid #aaa;
  box-shadow: inset 0 1px 1px rgba(0,0,0,0.15), 0 1px 0 rgba(255,255,255,0.6);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: linear-gradient(145deg, #4d8aff 0%, #1a60e8 50%, #0044cc 100%);
  border: 1px solid #0040bb;
  box-shadow: 0 1px 2px rgba(0,0,0,0.25), 0 1px 0 rgba(255,255,255,0.25) inset;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb:active {
  background: linear-gradient(145deg, #3378ff 0%, #0050d0 50%, #003aaa 100%);
}

input[type="range"]::-moz-range-thumb {
  width: 13px; height: 13px;
  border-radius: 50%;
  background: linear-gradient(145deg, #4d8aff 0%, #1a60e8 50%, #0044cc 100%);
  border: 1px solid #0040bb;
  box-shadow: 0 1px 2px rgba(0,0,0,0.25);
  cursor: pointer;
}

/* ── STATUS BAR ── */
#statusbar {
  display: flex;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: 26px;
  align-items: center;
  padding: 0 16px;
  gap: 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  background: rgba(20, 20, 20, 0.92);
  backdrop-filter: blur(10px);
  z-index: 100;
}

.stat {
  font-size: 11px;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.35);
  text-transform: uppercase;
}

.stat em {
  color: rgba(255,255,255,0.65);
  font-style: normal;
  margin-left: 5px;
}

.stat-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #3d8;
  display: inline-block;
  margin-right: 6px;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ── BUTTONS ── */
.btn-animate {
  width: 100%;
  padding: 7px 0;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #f0f0f0;
  background: linear-gradient(to bottom, #2a2a2a, #1e1e1e);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s;
}

.btn-animate:hover  { background: linear-gradient(to bottom, #3a3a3a, #2e2e2e); }
.btn-animate:active { background: linear-gradient(to bottom, #1e1e1e, #141414); }

/* ── CHECKBOX (flip toggle) ── */
input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 12px;
  background: #b8b8b8;
  border: 1px solid #aaa;
  border-radius: 7px;
  box-shadow: inset 0 1px 1px rgba(0,0,0,0.15), 0 1px 0 rgba(255,255,255,0.6);
  cursor: pointer;
  position: relative;
  margin: 0;
  flex-shrink: 0;
  transition: background 0.15s;
  outline: none;
}

input[type="checkbox"]::before {
  content: '';
  position: absolute;
  top: 1px;
  left: 1px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(145deg, #ffffff 0%, #e4e4e4 100%);
  box-shadow: 0 1px 2px rgba(0,0,0,0.25);
  transition: left 0.15s;
}

input[type="checkbox"]:checked {
  background: linear-gradient(to right, #1a60e8, #4d8aff);
  border-color: #0040bb;
}

input[type="checkbox"]:checked::before {
  left: 13px;
}

/* ── ACTION BUTTONS (Reset / Reroll) ── */
.btn-row {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}

.action-btn {
  flex: 1;
  padding: 6px 0;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-bright);
  background: linear-gradient(to bottom, #f4f4f4, #e8e8e8);
  border: 1px solid #bbb;
  box-shadow: 0 1px 2px rgba(0,0,0,0.12), 0 1px 0 rgba(255,255,255,0.7) inset;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}

.action-btn:hover {
  border-color: rgba(0,87,216,0.5);
  background: linear-gradient(to bottom, #fafafa, #ececec);
}

.action-btn:active {
  background: linear-gradient(to bottom, #e4e4e4, #dcdcdc);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.15);
}

/* ── GRID STEPPERS (Columns / Rows) ── */
.grid-steppers {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.stepper-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stepper-label {
  font-size: 11px;
  color: var(--text);
  letter-spacing: 0.04em;
  text-align: center;
}

.stepper {
  display: flex;
  align-items: center;
  gap: 4px;
}

.stepper-btn {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 15px;
  line-height: 1;
  color: var(--text-bright);
  background: linear-gradient(to bottom, #f4f4f4, #e8e8e8);
  border: 1px solid #bbb;
  box-shadow: 0 1px 2px rgba(0,0,0,0.12), 0 1px 0 rgba(255,255,255,0.7) inset;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}

.stepper-btn:hover {
  border-color: rgba(0,87,216,0.5);
  background: linear-gradient(to bottom, #fafafa, #ececec);
}

.stepper-btn:active {
  background: linear-gradient(to bottom, #e4e4e4, #dcdcdc);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.15);
}

.stepper-val {
  flex: 1;
  text-align: center;
  font-size: 12px;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

/* ── PALETTE BUTTONS ── */
.palette-row {
  display: flex;
  gap: 6px;
}

.btn-palette {
  flex: 1;
  height: 28px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.12);
  background: linear-gradient(to bottom, #2a2a2a, #1e1e1e);
  color: #f0f0f0;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.1s, border-color 0.1s;
}

.btn-palette:hover { background: linear-gradient(to bottom, #3a3a3a, #2e2e2e); }

.btn-palette--active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0,87,216,0.25);
}

/* ── SLIDER WRAPPERS ── */
.slider-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
}

.slider-wrap input[type="range"] {
  width: 100%;
}

.slider-tick-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
}

.slider-tick-wrap input[type="range"] {
  width: 100%;
}

.slider-tick {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: 10px;
  background: rgba(0,0,0,0.25);
  border-radius: 1px;
  pointer-events: none;
  z-index: 0;
}

/* ══════════════════════════════════════════════════════════════════
   MOBILE  —  below typical phone width the floating panel becomes a
   full-width bottom sheet with larger, thumb-friendly controls. Same
   palette / type as the desktop panel, just re-flowed for touch.
   !important beats the drag handler's inline top/left when a desktop
   session is narrowed into the mobile range.
   ══════════════════════════════════════════════════════════════════ */
@media (max-width: 600px) {
  /* Bottom-sheet panel, edge to edge */
  #panel {
    top: auto !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100% !important;
    max-width: 100%;
    border-radius: 14px 14px 0 0;
    border-left: none;
    border-right: none;
    border-bottom: none;
    box-shadow: 0 -6px 30px rgba(0,0,0,0.45), 0 1px 0 rgba(255,255,255,0.8) inset;
  }

  /* Header: no drag, add an iOS-style grab handle at the top */
  #panel-header {
    cursor: default;
    padding: 13px 16px 8px;
    border-radius: 14px 14px 0 0;
    position: relative;
  }
  #panel-header:active { cursor: default; }
  #panel-header::before {
    content: '';
    position: absolute;
    top: 7px; left: 50%;
    transform: translateX(-50%);
    width: 40px; height: 4px;
    border-radius: 2px;
    background: rgba(255,255,255,0.28);
  }
  .panel-title  { font-size: 15px; }
  .panel-byline { font-size: 10px; }
  .panel-minimize { width: 26px; height: 26px; }

  /* Bottom sheet leaves the canvas visible above; respect the home bar */
  #panel-body {
    max-height: 50vh;
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
  .section-content { padding: 11px 13px 13px; }

  /* Steppers — compact tap targets */
  .grid-steppers { gap: 10px; margin-bottom: 11px; }
  .stepper-label { font-size: 12px; margin-bottom: 2px; }
  .stepper-btn   { width: 38px; height: 38px; font-size: 19px; border-radius: 7px; }
  .stepper-val   { font-size: 15px; }

  /* Toggles — 2×2 grid of button-style on/off pills (label centered, whole cell tappable) */
  .ctrl-grid { gap: 9px; margin-bottom: 11px; }
  .ctrl-grid .ctrl {
    position: relative;
    justify-content: center;
    padding: 10px 6px;
    background: linear-gradient(to bottom, #f4f4f4, #e8e8e8);
    border: 1px solid #bbb;
    box-shadow: 0 1px 2px rgba(0,0,0,0.12), 0 1px 0 rgba(255,255,255,0.7) inset;
    border-radius: 8px;
    transition: background 0.12s, border-color 0.12s, box-shadow 0.12s;
  }
  .ctrl-grid .ctrl-label {
    min-width: 0;
    text-align: center;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-bright);
    transition: color 0.12s;
  }

  /* Checkbox becomes an invisible full-cell tap layer over the button */
  .ctrl-grid input[type="checkbox"] {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    opacity: 0;
    border: none;
    border-radius: 8px;
  }
  .ctrl-grid input[type="checkbox"]::before { display: none; }

  /* Pressed feedback */
  .ctrl-grid .ctrl:active {
    background: linear-gradient(to bottom, #e4e4e4, #dcdcdc);
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.15);
  }

  /* ON state */
  .ctrl-grid .ctrl:has(input:checked) {
    background: linear-gradient(to bottom, #2f74ff, #0f5ae0);
    border-color: #0040bb;
    box-shadow: 0 1px 2px rgba(0,0,0,0.2), 0 1px 0 rgba(255,255,255,0.25) inset;
  }
  .ctrl-grid .ctrl:has(input:checked) .ctrl-label { color: #fff; }
  .ctrl-grid .ctrl:has(input:checked):active {
    background: linear-gradient(to bottom, #0f5ae0, #0a48c0);
  }

  /* Action buttons — compact but easy to hit */
  .btn-row { gap: 8px; margin-top: 10px; }
  .action-btn { padding: 11px 0; font-size: 13px; border-radius: 7px; }
}