:root {
  --navy: #062a4d;
  --gold: #c69214;
  --muted: #64748b;
  --bg: #0b1220;
  --panel: #0f172a;
  --green: #22c55e;
  --red: #ef4444;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  overflow-x: hidden;
}

body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: var(--bg);
  color: #fff;
  min-height: -webkit-fill-available;
  min-height: 100vh;
}

/* Header */
.sd-header {
  border-bottom: 1px solid #1f2937;
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 10;
}

.sd-container {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(10px, 3vw, 16px);
  flex-wrap: wrap;
  gap: 10px;
}

.sd-container h1 {
  font-size: clamp(1.1rem, 4vw, 1.5rem);
  margin: 0;
  color: var(--gold);
}

.sd-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.sd-btn {
  background: #1f2937;
  color: #fff;
  border: 1px solid #374151;
  padding: clamp(8px, 2.5vw, 12px) clamp(12px, 3vw, 16px);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  font-size: clamp(0.85rem, 3vw, 1rem);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.1s, background 0.15s;
}

.sd-btn:active {
  transform: scale(0.97);
  background: #374151;
}

.sd-btn[disabled] {
  opacity: .5;
  cursor: not-allowed;
}

.sd-primary {
  background: var(--gold);
  color: #111;
  border-color: #eab308;
}

.sd-primary:active {
  background: #a57b0f;
}

/* Stats bar */
.sd-stats {
  display: flex;
  gap: clamp(8px, 2vw, 18px);
  padding: 10px clamp(10px, 3vw, 16px);
  max-width: 1000px;
  margin: 0 auto;
  color: #cbd5e1;
  flex-wrap: wrap;
  justify-content: center;
}

.sd-stats .stat {
  display: flex;
  gap: 6px;
  align-items: center;
  background: #111827;
  padding: clamp(6px, 2vw, 8px) clamp(8px, 2.5vw, 12px);
  border-radius: 8px;
  border: 1px solid #1f2937;
}

.sd-stats .stat span {
  font-size: clamp(0.65rem, 2vw, 0.75rem);
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #94a3b8;
}

.sd-stats .stat strong {
  font-size: clamp(0.9rem, 3vw, 1rem);
  color: #fff;
}

/* Main game area */
.sd-main {
  max-width: 1000px;
  margin: clamp(10px, 3vw, 22px) auto;
  padding: 0 clamp(10px, 3vw, 16px);
}

.sd-board {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(8px, 2vw, 16px);
}

.sd-imgwrap {
  position: relative;
  background: var(--panel);
  border: 1px solid #1f2937;
  border-radius: 12px;
  overflow: hidden;
  touch-action: manipulation;
}

.sd-imgwrap canvas {
  display: block;
  width: 100%;
  height: auto;
  cursor: crosshair;
  touch-action: manipulation;
}

.sd-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.sd-marker {
  position: absolute;
  border: 2px solid var(--green);
  border-radius: 50%;
  background: transparent;
  transform: translate(-50%, -50%);
  pointer-events: none;
  animation: markerPop 0.3s ease;
}

@keyframes markerPop {
  0% { transform: translate(-50%, -50%) scale(0); }
  50% { transform: translate(-50%, -50%) scale(1.2); }
  100% { transform: translate(-50%, -50%) scale(1); }
}

.sd-notify {
  text-align: center;
  margin-top: clamp(10px, 3vw, 16px);
  color: #cbd5e1;
  min-height: 24px;
  font-size: clamp(0.9rem, 3vw, 1rem);
}

/* Tablet */
@media (max-width: 900px) {
  .sd-board {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
}

/* Mobile */
@media (max-width: 500px) {
  .sd-container {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
  .sd-controls {
    justify-content: center;
  }
  .sd-stats {
    justify-content: center;
    gap: 6px;
  }
  .sd-stats .stat {
    padding: 5px 8px;
  }
  .sd-imgwrap {
    border-radius: 8px;
  }
}

@media (max-width: 360px) {
  .sd-btn {
    padding: 8px 10px;
    font-size: 0.8rem;
  }
  .sd-stats .stat span {
    font-size: 0.6rem;
  }
}

/* Landscape mobile */
@media (max-height: 500px) and (orientation: landscape) {
  .sd-header {
    position: static;
  }
  .sd-board {
    grid-template-columns: 1fr 1fr;
    max-width: none;
  }
  .sd-imgwrap canvas {
    max-height: 60vh;
    width: auto;
    margin: 0 auto;
  }
}