:root {
  color-scheme: dark;
  --bg: #05090b;
  --glass: #0d171bb8;
  --glass-strong: #0d171bf0;
  --line: #ffffff17;
  --line-strong: #ffffff2b;
  --text: #e6eeea;
  --muted: #94a3a5;
  --accent: #5fc27e;
  --mint: #a2edbf;
  --radius: 18px;
  --gap: 16px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.55;
  background: var(--bg);
  color: var(--text);
}
* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
  margin: 0;
  /* The playground is one fixed canvas view; panels scroll internally. */
  overflow: hidden;
  overscroll-behavior: none;
}
body {
  background: radial-gradient(ellipse at 50% 50%, #0b1519 0%, var(--bg) 70%);
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input {
  font: inherit;
  color: inherit;
}
button {
  cursor: pointer;
}
:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

#preview {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100dvh;
  display: block;
}
.fallback {
  position: fixed;
  inset: 50% auto auto 50%;
  translate: -50% -50%;
  color: var(--muted);
}

/* Frosted glass shared by every floating surface. */
.glass {
  background: var(--glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow:
    0 20px 50px #0007,
    inset 0 1px #ffffff0d;
}

.topbar {
  position: fixed;
  inset: var(--gap) var(--gap) auto;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  pointer-events: none;
}
.topbar > * {
  pointer-events: auto;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px 7px 9px;
  border-radius: 40px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.topbar-actions {
  display: flex;
  gap: 8px;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 15px;
  border-radius: 40px;
  font-size: 13px;
  font-weight: 500;
}
.pill:hover,
.tool:hover {
  border-color: var(--line-strong);
  background: var(--glass-strong);
}
#toggle-panel[aria-expanded="true"] {
  border-color: #5fc27e60;
  color: var(--mint);
}

.intro {
  position: fixed;
  left: calc(var(--gap) + 8px);
  bottom: calc(var(--gap) + 40px);
  z-index: 1;
  max-width: 380px;
  pointer-events: none;
}
.intro h1 {
  margin: 0;
  font-size: clamp(34px, 4.4vw, 56px);
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(180deg, #ffffff, #9fb3ad);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}
.intro p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.credit {
  position: fixed;
  left: calc(var(--gap) + 8px);
  bottom: var(--gap);
  z-index: 1;
  max-width: min(560px, calc(50vw - 200px));
  color: #7d8c8e;
  font-size: 11.5px;
}
.credit a {
  color: var(--mint);
}

.panel {
  position: fixed;
  top: calc(var(--gap) + 54px);
  right: var(--gap);
  bottom: var(--gap);
  z-index: 2;
  width: 312px;
  padding: 18px;
  border-radius: var(--radius);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: #ffffff22 transparent;
  transition:
    opacity 0.25s,
    translate 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.panel[data-hidden] {
  opacity: 0;
  translate: calc(100% + var(--gap)) 0;
  pointer-events: none;
}
.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.panel h2,
.panel legend {
  margin: 0;
  padding: 0;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.link {
  padding: 0;
  border: 0;
  background: none;
  color: var(--muted);
  font-size: 12px;
}
.link:hover {
  color: var(--mint);
}
.presets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-bottom: 18px;
}
.preset {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 10px 4px 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffff05;
  font-size: 11.5px;
  color: var(--muted);
}
.preset:hover {
  border-color: #5fc27e70;
  color: var(--text);
}
.swatch {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--swatch);
  box-shadow: 0 0 14px #ffffff10;
}
fieldset {
  margin: 0 0 14px;
  padding: 14px 0 0;
  border: 0;
  border-top: 1px solid var(--line);
}
fieldset legend {
  float: left;
  width: 100%;
  margin-bottom: 10px;
}
.field {
  display: grid;
  gap: 2px;
  margin-bottom: 9px;
  /* Sit below the floated legend instead of beside it. */
  clear: both;
}
.field label {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
}
.field output {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.field.color {
  grid-template-columns: 1fr auto;
  align-items: center;
}
input[type="range"] {
  width: 100%;
  height: 20px;
  margin: 0;
  accent-color: var(--accent);
}
input[type="color"] {
  width: 40px;
  height: 26px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: none;
  cursor: pointer;
}
input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 3px;
}
input[type="color"]::-webkit-color-swatch {
  border: 0;
  border-radius: 5px;
}

.toolbar {
  position: fixed;
  left: 50%;
  bottom: var(--gap);
  z-index: 2;
  translate: -50% 0;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px;
  border-radius: 40px;
}
.tool {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  min-width: 38px;
  justify-content: center;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 40px;
  background: none;
  font-size: 13px;
}
#toggle .icon-play,
#toggle[data-paused="true"] .icon-pause {
  display: none;
}
#toggle[data-paused="true"] .icon-play {
  display: block;
}
.primary,
.ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  padding: 0 18px;
  border-radius: 40px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}
.primary {
  border: 1px solid #e7fff2;
  background: linear-gradient(#f5fff9, #cfe7da);
  color: #10291e;
  box-shadow: 0 0 24px #8fffc630;
}
.primary:hover {
  background: #fff;
}
.ghost {
  border: 1px solid var(--line-strong);
  background: transparent;
  font-weight: 500;
}
.ghost:hover {
  border-color: #5fc27e90;
}

.code {
  width: min(880px, calc(100vw - 2 * var(--gap)));
  max-height: min(720px, calc(100dvh - 2 * var(--gap)));
  padding: 22px;
  border-radius: 22px;
  color: var(--text);
  overflow: hidden;
  flex-direction: column;
  gap: 14px;
}
.code[open] {
  display: flex;
  animation: rise 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}
.code::backdrop {
  background: #02050680;
  backdrop-filter: blur(4px);
}
@keyframes rise {
  from {
    opacity: 0;
    translate: 0 16px;
  }
}
.code-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}
.code-head h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.02em;
}
.code-head p {
  margin: 4px 0 0;
  color: var(--muted);
}
.close {
  display: grid;
  place-items: center;
  flex: none;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #ffffff08;
}
.close:hover {
  border-color: var(--line-strong);
}
.code-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.code-actions {
  display: flex;
  gap: 8px;
}
.tabs {
  display: flex;
  gap: 2px;
  padding: 4px;
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 40px;
  background: #00000040;
}
.tabs button {
  padding: 6px 14px;
  border: 0;
  border-radius: 40px;
  background: none;
  color: var(--muted);
  font-size: 12.5px;
  white-space: nowrap;
}
.tabs button[aria-selected="true"] {
  background: #ffffff14;
  color: var(--text);
}
.snippet {
  flex: 1;
  min-height: 0;
  margin: 0;
  overflow: auto;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #03070899;
  font: 12.5px/1.65 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: #cfe3d8;
}
/* The agent prompt is prose, so let it wrap instead of scrolling sideways. */
.snippet.prose {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-family: inherit;
  font-size: 13.5px;
  line-height: 1.7;
}
.snippet.prose code {
  font: inherit;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--gap) + 64px);
  z-index: 10;
  translate: -50% 8px;
  padding: 8px 16px;
  border-radius: 40px;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.2s,
    translate 0.2s;
}
.toast[data-visible] {
  opacity: 1;
  translate: -50% 0;
}

@media (max-width: 760px) {
  :root {
    --gap: 12px;
  }
  .topbar .pill span {
    display: none;
  }
  .topbar .pill {
    width: 38px;
    padding: 0;
    justify-content: center;
  }
  .intro {
    top: 64px;
    bottom: auto;
    left: var(--gap);
    right: var(--gap);
    max-width: none;
  }
  .intro p {
    font-size: 13.5px;
    margin-top: 8px;
  }
  .credit {
    display: none;
  }
  /* Settings become a sheet above the toolbar. */
  .panel {
    top: auto;
    left: var(--gap);
    right: var(--gap);
    bottom: calc(var(--gap) + 58px);
    width: auto;
    max-height: 52dvh;
  }
  .panel[data-hidden] {
    translate: 0 calc(100% + 80px);
  }
  .presets {
    grid-template-columns: repeat(5, 1fr);
  }
  .tool-label {
    display: none;
  }
  .code {
    padding: 16px;
  }
  .code-head p {
    font-size: 13px;
  }
}