:root {
  --panel: rgba(9, 11, 26, 0.6);
  --line: rgba(255, 255, 255, 0.09);
  --text: #eef1fb;
  --dim: #8e97b8;
  --accent: #22e4ff;
  --hot: #ff2bd6;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #05060f;
  color: var(--text);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}

#c {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  touch-action: none;
}

/* ---------------------------------------------------------------- HUD */

#hud {
  position: fixed;
  top: 20px;
  left: 24px;
  pointer-events: none;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.5);
}

.kicker {
  pointer-events: auto;
  color: var(--accent);
  font: 600 13px/1 'Outfit', sans-serif;
  letter-spacing: 0.16em;
  text-decoration: none;
}

.kicker:hover { color: var(--text); }

h1 {
  margin: 6px 0 14px;
  font: 800 44px/1 'Outfit', sans-serif;
  letter-spacing: 0.01em;
  background: linear-gradient(90deg, #fff 0%, #fff 55%, #ffb7f1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stats { display: flex; gap: 8px; }

.stat {
  min-width: 98px;
  padding: 7px 10px 8px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel);
  backdrop-filter: blur(10px);
}

.stat span {
  display: block;
  font-size: 9.5px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

.stat b {
  display: block;
  margin-top: 3px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.stat:first-child b { color: var(--accent); }

.perf, .api {
  margin-top: 12px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--dim);
}

.perf b { color: var(--text); margin-left: 4px; }
.perf b:first-child { margin-left: 0; }
.api { margin-top: 8px; color: var(--text); font-weight: 700; }

.badges { margin-top: 10px; display: flex; gap: 6px; }

.badge {
  display: none;
  padding: 3px 8px;
  border-radius: 5px;
  background: var(--hot);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.badge.cool { background: var(--accent); color: #041018; }
.badge.on { display: inline-block; }

/* -------------------------------------------------------------- panel */

#panelToggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px 8px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  backdrop-filter: blur(12px);
  color: var(--text);
  font: 600 13px 'Outfit', sans-serif;
  letter-spacing: 0.02em;
  cursor: pointer;
}

#panelToggle:hover { border-color: rgba(255, 255, 255, 0.22); }
#panelToggle svg { width: 16px; height: 16px; transition: transform 0.2s; }
#panelToggle[aria-expanded='true'] svg { transform: rotate(180deg); }

#panel {
  position: fixed;
  top: 64px;
  right: 20px;
  width: 260px;
  padding: 12px 14px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  backdrop-filter: blur(12px);
  transform-origin: top right;
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
}

body.panel-closed #panel {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.98);
}

#panel section + section { margin-top: 12px; }

#panel h2 {
  display: flex;
  justify-content: space-between;
  margin: 0 0 6px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--dim);
}

#panel h2 span { color: var(--text); }

.seg {
  display: flex;
  padding: 2px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
}

.seg button, #newCity {
  flex: 1;
  padding: 6px 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--dim);
  font: 600 11.5px 'Outfit', sans-serif;
  cursor: pointer;
}

.seg button:hover { color: var(--text); }
.seg button.on { background: rgba(255, 255, 255, 0.14); color: var(--text); }

input[type='range'] { width: 100%; accent-color: var(--accent); }

.note { font-size: 9.5px; color: var(--dim); }

.seedrow { display: flex; gap: 6px; }

#seed {
  width: 0;
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.3);
  color: var(--text);
  font: 500 12px 'JetBrains Mono', monospace;
}

#newCity {
  flex: 0 0 auto;
  padding: 6px 12px;
  background: var(--hot);
  color: #fff;
}

#newCity:hover { filter: brightness(1.1); }

.panelhint {
  margin: 12px 0 0;
  font-size: 9.5px;
  color: var(--dim);
}

button:focus-visible, input:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

/* --------------------------------------------------------------- hint */

#hint {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 14px;
  width: max-content;
  max-width: calc(100vw - 32px);
  padding: 8px 14px;
  border-radius: 10px;
  background: var(--panel);
  backdrop-filter: blur(10px);
  color: var(--dim);
  font-size: 11px;
  pointer-events: none;
}

#hint span { white-space: nowrap; }
#hint .mouse b { color: var(--text); font-weight: 700; }

kbd {
  display: inline-block;
  min-width: 18px;
  margin-right: 2px;
  padding: 1px 5px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font: 700 10px 'JetBrains Mono', monospace;
  text-align: center;
}

/* ---------------------------------------------------------- film mode */

body.film #hud,
body.film #panel,
body.film #panelToggle,
body.film #hint { display: none; }

body::before,
body::after {
  content: '';
  position: fixed;
  left: 0;
  right: 0;
  height: 0;
  background: #000;
  pointer-events: none;
  transition: height 0.4s ease;
  z-index: 3;
}

body::before { top: 0; }
body::after { bottom: 0; }
body.film::before,
body.film::after { height: 11vh; }

#error {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: #05060f;
  font-size: 14px;
  text-align: center;
}

#error[hidden] { display: none; }

@media (max-width: 720px) {
  #hud { top: 12px; left: 16px; }
  h1 { font-size: 30px; margin-bottom: 10px; }
  .kicker { font-size: 11px; }
  .stat { min-width: 0; padding: 6px 8px; }
  .stat b { font-size: 14px; }
  .perf { font-size: 9.5px; }
  #panelToggle { top: auto; bottom: 16px; right: 16px; }
  #panelToggle[aria-expanded='true'] svg { transform: none; }
  #panelToggle svg { transform: rotate(180deg); }
  #panel {
    top: auto;
    right: 16px;
    bottom: 62px;
    left: 16px;
    width: auto;
    padding: 10px 12px;
    transform-origin: bottom right;
  }
  #panel section + section { margin-top: 8px; }
  #hint { display: none; }
}