:root {
  --font-display: 'Baloo 2', cursive;
  --font-body: 'Nunito', sans-serif;
  --text-xs: clamp(0.75rem, 0.72rem + 0.2vw, 0.875rem);
  --text-sm: clamp(0.9rem, 0.84rem + 0.2vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.3vw, 1.1rem);
  --text-lg: clamp(1.2rem, 1rem + 0.7vw, 1.7rem);
  --text-xl: clamp(1.7rem, 1.2rem + 1.5vw, 2.7rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  --shadow-soft: 0 12px 40px rgba(13, 22, 39, 0.15);
  --shadow-glow: 0 0 40px rgba(255, 255, 255, 0.18);

  --bg-image: url("images/cozy.png");
  --surface: rgba(255, 243, 247, 0.82);
  --surface-strong: rgba(255, 233, 240, 0.95);
  --border: rgba(47, 37, 71, 0.16);
  --text: #2f2547;
  --muted: #625878;
  --accent: #ff6ea8;
  --accent-2: #5bbcff;
  --warning: #ff9c52;
  --screen-tint: rgba(255, 255, 255, 0.22);
  --screen-glow: rgba(255, 255, 255, 0.35);
  --particle-color: rgba(255,255,255,0.5);
  --panel-fill: #ffe8f1;
  --panel-fill-2: #fff4f8;
  --frame-stroke: #232838;
  --frame-shadow: rgba(30, 36, 52, 0.24);
}

html[data-theme="cyberpunk"] {
  --bg-image: url("images/cyberpunk.jpg");
  --surface: rgba(18, 24, 44, 0.78);
  --surface-strong: rgba(26, 35, 62, 0.96);
  --border: rgba(111, 232, 255, 0.24);
  --text: #e3f8ff;
  --muted: #9fc3d2;
  --accent: #ff4fa2;
  --accent-2: #52f7ff;
  --warning: #ffe15d;
  --screen-tint: rgba(57, 203, 255, 0.1);
  --screen-glow: rgba(82, 247, 255, 0.2);
  --particle-color: rgba(82,247,255,0.5);
  --panel-fill: #18233d;
  --panel-fill-2: #223055;
}

html[data-theme="cartoon"] {
  --bg-image: url("images/cartoon.jpg");
  --surface: rgba(255, 251, 222, 0.88);
  --surface-strong: rgba(255, 245, 182, 0.96);
  --border: rgba(36, 49, 78, 0.18);
  --text: #24314e;
  --muted: #4d5d7c;
  --accent: #ff5a7b;
  --accent-2: #4679ff;
  --warning: #ff9c2f;
  --screen-tint: rgba(255, 255, 255, 0.18);
  --screen-glow: rgba(255, 236, 160, 0.34);
  --particle-color: rgba(255,255,255,0.7);
  --panel-fill: #fff1a8;
  --panel-fill-2: #fff8cf;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--text);
  background-image:
    linear-gradient(rgba(255,255,255,0.08), rgba(255,255,255,0.08)),
    var(--bg-image);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  overflow-x: hidden;
}

img, svg, canvas { display: block; max-width: 100%; }
button { font: inherit; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: #111;
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 100;
}
.skip-link:focus { top: 1rem; }

.background-image-hint {
  position: fixed;
  inset: 0;
  background-image: var(--bg-image);
  background-size: cover;
  background-position: center;
  opacity: 0.14;
  pointer-events: none;
}

.floating-dust,
.floating-dust::before,
.floating-dust::after {
  position: fixed;
  inset: 0;
  pointer-events: none;
  content: "";
}

.floating-dust {
  background-image:
    radial-gradient(circle at 10% 10%, var(--particle-color) 0 2px, transparent 3px),
    radial-gradient(circle at 30% 70%, var(--particle-color) 0 1px, transparent 2px),
    radial-gradient(circle at 80% 25%, var(--particle-color) 0 2px, transparent 3px),
    radial-gradient(circle at 68% 80%, var(--particle-color) 0 1.6px, transparent 3px);
  animation: floatDust 18s linear infinite;
  opacity: 0.7;
}

.floating-dust::before {
  background-image:
    radial-gradient(circle at 15% 50%, var(--particle-color) 0 1px, transparent 2px),
    radial-gradient(circle at 55% 18%, var(--particle-color) 0 1.8px, transparent 3px),
    radial-gradient(circle at 92% 75%, var(--particle-color) 0 1px, transparent 2px);
  animation: floatDust 23s linear infinite reverse;
  opacity: 0.55;
}

.floating-dust::after {
  background: linear-gradient(transparent, rgba(255,255,255,0.06), transparent);
  mix-blend-mode: soft-light;
}

.topbar,
.hud-panel,
.info-grid,
.app-shell {
  width: min(1180px, calc(100% - 2rem));
  margin-inline: auto;
}

.topbar {
  display: flex;
  gap: var(--space-4);
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) 0 var(--space-2);
  flex-wrap: wrap;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  overflow: visible;
}

.topbar::before {
  content: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  position: relative;
  z-index: 1;
}

.brand-logo {
  width: 58px;
  height: 58px;
  color: var(--accent);
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.12));
}

.eyebrow {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  line-height: 1;
}

h1 { font-size: var(--text-xl); }
h2 { font-size: clamp(1.8rem, 1.2rem + 1.8vw, 3rem); }
h3 { font-size: var(--text-lg); }
p { color: var(--muted); }

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  position: relative;
  z-index: 1;
}

.control-btn {
  border: 3px solid var(--frame-stroke);
  background: linear-gradient(180deg, var(--panel-fill-2), var(--panel-fill));
  color: var(--text);
  padding: 0.9rem 1.1rem;
  min-height: 44px;
  box-shadow: 0 6px 0 color-mix(in srgb, var(--frame-stroke) 72%, black);
  border-radius: 18px;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.control-btn:hover,
.control-btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 0 color-mix(in srgb, var(--frame-stroke) 72%, black);
}

.control-btn.primary {
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 55%, white), var(--accent));
  color: white;
  border-color: color-mix(in srgb, var(--frame-stroke) 75%, var(--accent));
}

.app-shell {
  display: grid;
  gap: var(--space-6);
  padding-bottom: var(--space-12);
}

.glass-panel,
.glass-card,
.hud-panel,
.info-card {
  background: linear-gradient(180deg, var(--panel-fill-2), var(--panel-fill));
  border: 5px solid var(--frame-stroke);
  border-radius: 28px;
  box-shadow:
    0 14px 0 var(--frame-stroke),
    0 24px 48px var(--frame-shadow);
  position: relative;
  overflow: hidden;
}

.glass-panel::before,
.glass-card::before,
.hud-panel::before,
.info-card::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 2px solid color-mix(in srgb, var(--frame-stroke) 55%, white);
  border-radius: 18px;
  pointer-events: none;
  opacity: 0.45;
}

.hud-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  padding: var(--space-5);
}

.panel-label {
  margin: 0 0 0.25rem;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.panel-value {
  margin: 0;
  color: var(--text);
  font-weight: 800;
  font-size: var(--text-lg);
}

.screen-stage { min-height: 60vh; }

.screen-frame {
  position: relative;
  min-height: 68vh;
  padding: 1rem;
  overflow: hidden;
  background: #ffffff;
  border: 6px solid var(--frame-stroke);
  border-radius: 28px;
  box-shadow:
    0 18px 0 var(--frame-stroke),
    0 28px 60px var(--frame-shadow);
}

.screen-frame::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 3px solid color-mix(in srgb, var(--frame-stroke) 55%, white);
  border-radius: 20px;
  pointer-events: none;
  opacity: 0.75;
}

.screen-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.2), rgba(255,255,255,0.02));
  pointer-events: none;
}

.screen-glow {
  position: absolute;
  inset: -20%;
  background: radial-gradient(circle, rgba(255,255,255,0.16), transparent 55%);
  filter: blur(60px);
  pointer-events: none;
}

#dirtCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: none;
  background: transparent;
}

.cleaner {
  position: absolute;
  top: 0;
  left: 0;
  bottom: auto;
  right: auto;
  z-index: 30;
  width: clamp(104px, 11vw, 150px);
  transform-origin: center center;
  will-change: left, top, transform;
  pointer-events: none;
}

.cleaner img {
  width: 100%;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 12px 18px rgba(0,0,0,0.18));
  user-select: none;
  pointer-events: none;
}

.cleaner.walking { animation: bob 0.55s ease-in-out infinite alternate; }
.cleaner.cleaning { animation: cleanPulse 0.32s ease-in-out infinite alternate; }
.cleaner.slipping { animation: slip 0.9s ease; }
.cleaner.dancing { animation: dance 0.7s ease-in-out 4; }
.cleaner.sleeping { animation: sleepy 1.3s ease-in-out infinite; }
.cleaner.angry { animation: angryBounce 0.45s ease-in-out infinite alternate; }

.speech-bubble {
  position: absolute;
  right: 1rem;
  bottom: 8rem;
  z-index: 40;
  max-width: 280px;
  background: linear-gradient(180deg, #ffffff, #fff6f8);
  color: #2d2743;
  padding: 0.9rem 1rem;
  box-shadow: 0 10px 24px rgba(0,0,0,0.12);
  border: 3px solid var(--frame-stroke);
  border-radius: 20px;
  opacity: 0;
  transform: translateY(12px) scale(0.96);
  transition: 220ms ease;
}

.speech-bubble.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.speech-bubble::after {
  content: "";
  position: absolute;
  bottom: -11px;
  left: 24px;
  width: 18px;
  height: 18px;
  background: inherit;
  border-right: 3px solid var(--frame-stroke);
  border-bottom: 3px solid var(--frame-stroke);
  transform: rotate(45deg);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.info-card {
  padding: 1.2rem;
}

@keyframes bob {
  from { transform: translateY(0); }
  to { transform: translateY(-6px); }
}

@keyframes cleanPulse {
  from { transform: rotate(-4deg) scale(1.02); }
  to { transform: rotate(3deg) scale(1.05); }
}

@keyframes slip {
  0% { transform: translateY(0) rotate(0); }
  30% { transform: translateY(-6px) rotate(8deg); }
  60% { transform: translateY(2px) rotate(-18deg); }
  100% { transform: translateY(0) rotate(0); }
}

@keyframes dance {
  0%, 100% { transform: rotate(0deg) translateY(0); }
  25% { transform: rotate(-10deg) translateY(-4px); }
  75% { transform: rotate(10deg) translateY(-4px); }
}

@keyframes sleepy {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(4px) scale(0.98); }
}

@keyframes angryBounce {
  from { transform: scale(1.02) translateY(0); }
  to { transform: scale(1.08) translateY(-4px); }
}

@keyframes floatDust {
  from { transform: translateY(0); }
  to { transform: translateY(-25px); }
}

@media (max-width: 900px) {
  .hud-panel,
  .info-grid { grid-template-columns: 1fr; }

  .screen-frame { min-height: 74vh; }
  .screen-content { min-height: calc(74vh - 2rem); }

  .welcome-card {
    position: relative;
    top: 0;
    left: 0;
    margin: 1rem;
    max-width: calc(100% - 2rem);
  }

  .speech-bubble {
    right: 0.8rem;
    left: 0.8rem;
    bottom: 7.2rem;
    max-width: none;
  }
}

@media (max-width: 620px) {
  .topbar,
  .hud-panel,
  .info-grid,
  .app-shell {
    width: min(100% - 1rem, 1180px);
  }

  .topbar { padding: 1rem 0 0.25rem; }
  .controls { width: 100%; }
  .control-btn { flex: 1 1 calc(50% - 0.5rem); }

  .glass-panel,
  .glass-card,
  .hud-panel,
  .info-card {
    border-width: 4px;
    border-radius: 22px;
    box-shadow:
      0 10px 0 var(--frame-stroke),
      0 18px 36px var(--frame-shadow);
  }

  .glass-panel::before,
  .glass-card::before,
  .hud-panel::before,
  .info-card::before {
    inset: 8px;
    border-radius: 14px;
  }

  .screen-frame {
    padding: 0.7rem;
    min-height: 78vh;
    border-width: 5px;
    border-radius: 22px;
  }

  .screen-frame::before {
    inset: 8px;
    border-width: 2px;
    border-radius: 16px;
  }

  .screen-content { min-height: calc(78vh - 1.4rem); }
  .cleaner { width: 108px; }

  .speech-bubble {
    border-width: 2px;
    border-radius: 16px;
  }

  .speech-bubble::after {
    bottom: -9px;
    width: 16px;
    height: 16px;
    border-right-width: 2px;
    border-bottom-width: 2px;
  }
}