/* Malen Studio minimalist palette */
:root {
  --bg: #f7f7f7;
  --ink: #1f2a33;
  --muted: #6b7a86;
  --primary: #2b8a6e; /* teal-green */
  --accent: #ff7b5c;  /* soft coral */
  --beam: #3b4a57;
  --pan: #e6e9ed;
  --fulcrum: #3b4a57;
  --good: #2e8b57;
}

* { box-sizing: border-box; }
html, body { 
  height: 100%; 
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans", sans-serif;
  color: var(--ink);
  background: var(--bg);
  touch-action: manipulation;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid #e0e0e0;
  background: #fff;
}
.brand {
  font-size: 1.25rem;
  margin: 0;
}
.controls { display: flex; gap: 1rem; align-items: center; }
.select-row { display: flex; gap: .5rem; align-items: center; }
.select-row label {
  color: var(--muted);
  font-size: 0.9rem;
}
.select-row select {
  padding: 0.4rem 0.6rem;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  background: #f5f5f5;
  color: var(--ink);
  font-size: 0.9rem;
  cursor: pointer;
}
.select-row select:hover {
  border-color: #ccc;
}
.btn {
  font-size: 1rem;
  padding: .6rem 1rem;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s;
}
.btn.primary { 
  background: #5a9bd5;
  color: #fff;
  font-weight: 600;
  padding: 0.7rem 1.4rem;
  font-size: 1.1rem;
  box-shadow: 0 3px 8px rgba(90, 155, 213, 0.3);
}
.btn.primary:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 12px rgba(90, 155, 213, 0.4);
}
.btn.primary.success { 
  background: var(--good); 
  animation: pulse 0.5s ease-in-out infinite alternate;
}
@keyframes pulse {
  from { transform: scale(1); }
  to { transform: scale(1.05); }
}

.switch { position: relative; display: inline-flex; align-items: center; gap: .5rem; cursor: pointer; }
.switch input { display: none; }
.switch .slider { width: 42px; height: 24px; background: #ddd; border-radius: 999px; position: relative; transition: background 0.2s; }
.switch .slider::after {
  content: ""; width: 18px; height: 18px; background: white; border-radius: 50%; position: absolute; top: 3px; left: 3px; transition: left .2s ease; box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.switch input:checked + .slider { background: #5a9bd5; }
.switch input:checked + .slider::after { left: 21px; }
.switch .switch-label { color: var(--muted); font-size: 0.9rem; }
.switch-label { font-size: .95rem; color: var(--muted); }

main#game { max-width: 960px; margin: 0 auto; padding: 1rem; }
.hint { text-align: center; color: var(--muted); font-size: 1.1rem; }

/* Scale layout */
.scale {
  position: relative;
  height: auto;
  min-height: 550px;
  margin: 1rem auto 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  gap: 0.5rem;
}

.speak-buttons {
  display: flex;
  flex-direction: row;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.btn.speak-circle {
  background: #f5f5f5;
  color: #333;
  border: 2px solid #e0e0e0;
  border-radius: 16px;
  width: auto;
  height: 48px;
  padding: 0 14px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.btn.speak-circle:hover {
  background: #fff;
  box-shadow: 0 4px 8px rgba(0,0,0,0.15);
  transform: scale(1.05);
}
.btn.speak-circle:active {
  transform: scale(0.95);
}

.lang-label {
  font-weight: 600;
  font-size: 0.9rem;
  color: #555;
}

.sound-icon {
  font-size: 1rem;
  opacity: 0.7;
}

.scale-wrapper {
  position: relative;
  width: 600px;
  height: 380px;
}

.beam {
  position: absolute;
  width: 480px; 
  height: 12px; 
  background: linear-gradient(180deg, #5a6b7a 0%, #3b4a57 50%, #2d3a45 100%);
  top: 60px; 
  left: 50%; 
  transform: translateX(-50%) rotate(0deg);
  transform-origin: center center;
  border-radius: 6px;
  transition: transform .35s ease;
  box-shadow: 0 3px 6px rgba(0,0,0,.2);
  z-index: 10;
}

.fulcrum {
  position: absolute;
  top: 68px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 320px;
  background: linear-gradient(90deg, #4a5568 0%, #5a6b7a 50%, #4a5568 100%);
  border-radius: 4px;
  z-index: 5;
  box-shadow: 0 4px 12px rgba(0,0,0,.15);
}
.fulcrum::before {
  content: '';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 15px solid transparent;
  border-right: 15px solid transparent;
  border-bottom: 15px solid #5a6b7a;
}
.fulcrum-base {
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 20px;
  background: linear-gradient(180deg, #5a6b7a 0%, #3b4a57 100%);
  border-radius: 6px 6px 10px 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,.2);
}

/* Pan assemblies - positioned at beam ends */
.pan-assembly {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  top: 12px; /* Start just below the beam */
  transition: transform .35s ease;
  transform-origin: top center; /* Rotate from the attachment point */
}
.left-assembly {
  left: 0;
}
.right-assembly {
  right: 0;
}

/* String connecting to beam */
.pan-assembly::before {
  content: '';
  width: 3px;
  height: 140px;
  background: linear-gradient(180deg, #6b7a86 0%, #4a5568 100%);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

/* The actual pan (bowl shape) */
.pan {
  width: 140px;
  height: 120px; /* Fixed height so content doesn't push bowl down */
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
}
/* Visual string extension that goes through the pan */
.pan::before {
  content: '';
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 100px;
  background: linear-gradient(180deg, #6b7a86 0%, #4a5568 100%);
  z-index: 0;
}
.pan::after {
  content: '';
  width: 140px;
  height: 55px;
  background: linear-gradient(180deg, #d4dce4 0%, #b8c4d0 40%, #a0acb8 100%);
  border-radius: 0 0 70px 70px;
  box-shadow: 
    inset 0 -6px 12px rgba(0,0,0,.1),
    0 6px 16px rgba(0,0,0,.12);
  flex-shrink: 0;
}

/* Content area - positioned to sit inside the bowl and cover the string */
.pan-content {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 130px;
  height: 120px;
  z-index: 10;
}

.number-card {
  position: absolute;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);
  width: 70px; 
  height: 70px; 
  border-radius: 14px; 
  background: linear-gradient(145deg, #ffffff 0%, #f0f4f8 100%); 
  display: grid; 
  place-items: center; 
  font-size: 2.5rem; 
  font-weight: 700; 
  color: var(--ink);
  box-shadow: 0 4px 12px rgba(0,0,0,.1);
  border: 2px solid #e8edf2;
}

/* Tray */
.tray { margin: 10px 0; padding: 15px; }
.tray-items { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: center; }
.item {
  width: 80px; height: 80px; border-radius: 16px; 
  background: linear-gradient(145deg, #ffffff 0%, #f0f4f8 100%); 
  display: grid; place-items: center; 
  box-shadow: 0 6px 16px rgba(0,0,0,.1);
  border: 2px solid #e8edf2;
  touch-action: none;
  cursor: grab;
}
.item:active {
  cursor: grabbing;
}
.item img { width: 56px; height: 56px; pointer-events: none; }

/* Pile items in bowl */
.pile-item {
  width: 44px;
  height: 44px;
}

/* Dragging */
.dragging { 
  position: fixed; 
  z-index: 99; 
  pointer-events: none;
  opacity: 0.9;
}

/* Celebration */\n.celebration { position: fixed; inset: 0; display: none; pointer-events: none; }
.celebration.active { display: block; }

.dancing-cat {
  position: fixed;
  bottom: 100px;
  right: 20px;
  font-size: 80px;
  animation: dance 0.4s ease-in-out infinite alternate;
  z-index: 1000;
}
@keyframes dance {
  0% { transform: rotate(-15deg) translateY(0); }
  100% { transform: rotate(15deg) translateY(-10px); }
}

.footer { 
  text-align: center; 
  color: var(--muted); 
  padding: 2rem 1rem; 
}
.footer .copyright {
  margin-top: 0.25rem;
  font-size: 0.9rem;
}

/* Accessibility helpers */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* Responsive - Tablet */
@media (max-width: 768px) {
  .topbar {
    flex-direction: column;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
  }
  .brand {
    font-size: 1.1rem;
  }
  .controls {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
  }
  .hint {
    font-size: 0.95rem;
    padding: 0 0.5rem;
  }
}

/* Responsive - Mobile */
@media (max-width: 680px) {
  .topbar {
    padding: 0.5rem;
  }
  .brand {
    font-size: 1rem;
    text-align: center;
  }
  .controls {
    width: 100%;
    justify-content: center;
  }
  .btn.primary {
    padding: 0.5rem 1rem;
    font-size: 1rem;
  }
  .select-row label {
    display: none;
  }
  
  .scale {
    flex-direction: column;
    align-items: center;
    height: auto;
    min-height: 480px;
    gap: 0.5rem;
  }
  
  .speak-buttons {
    flex-direction: row;
    margin-top: 0;
    margin-bottom: 0;
    order: -2;
  }
  .btn.speak-circle {
    height: 40px;
    padding: 0 10px;
  }
  .lang-label {
    font-size: 0.8rem;
  }
  .sound-icon {
    font-size: 0.9rem;
  }
  
  .tray {
    order: -1;
    margin: 10px 0;
    padding: 10px;
  }
  .item {
    width: 70px;
    height: 70px;
    box-shadow: 0 0 0 4px rgba(90, 155, 213, 0.5), 0 6px 16px rgba(0,0,0,.1);
  }
  .item img {
    width: 48px;
    height: 48px;
  }
  
  .scale-wrapper { 
    width: 100%;
    max-width: 100%;
    height: 300px;
  }
  .beam { 
    width: 95%;
    max-width: 340px;
    height: 10px;
    top: 40px;
  }
  .fulcrum {
    height: 230px;
    top: 46px;
  }
  
  .pan-assembly::before {
    height: 90px;
  }
  .pan { 
    width: 100px; 
    height: 32px; 
    border-radius: 0 0 50px 50px; 
  }
  .pan::before {
    height: 32px;
  }
  .pan::after {
    width: 100px;
    height: 40px;
    border-radius: 0 0 50px 50px;
  }
  .pan-content { 
    width: 90px;
    max-width: 90px; 
    min-height: 70px;
    height: 90px;
  }
  .number-card { 
    width: 50px; 
    height: 50px; 
    font-size: 1.6rem; 
  }
  .left-assembly { left: 0; }
  .right-assembly { right: 0; }
  
  .pile-item {
    width: 32px;
    height: 32px;
  }
  
  .dancing-cat {
    font-size: 60px;
    bottom: 70px;
    right: 10px;
  }
  
  .footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    background: var(--bg);
    border-top: 1px solid #e0e0e0;
  }
  .footer p {
    margin: 0.15rem 0;
  }
}

/* Extra small phones */
@media (max-width: 400px) {
  .scale-wrapper {
    max-width: 100%;
    height: 260px;
  }
  .beam {
    width: 92%;
    max-width: 280px;
    height: 8px;
    top: 35px;
  }
  .fulcrum {
    height: 190px;
    top: 40px;
    width: 22px;
  }
  .pan-assembly::before {
    height: 75px;
  }
  .pan {
    width: 85px;
    height: 26px;
  }
  .pan::after {
    width: 85px;
    height: 34px;
  }
  .pan-content {
    width: 75px;
    max-width: 75px;
    min-height: 60px;
    height: 75px;
  }
  .number-card {
    width: 42px;
    height: 42px;
    font-size: 1.4rem;
  }
  .left-assembly { left: 0; }
  .right-assembly { right: 0; }
  
  .item {
    width: 60px;
    height: 60px;
  }
  .item img {
    width: 42px;
    height: 42px;
  }
  
  .pile-item {
    width: 28px;
    height: 28px;
  }
  
  .pile-item {
    width: 24px;
    height: 24px;
  }
  
  .btn.speak-circle {
    height: 38px;
    padding: 0 8px;
  }
}