/* Labirin Daur Ulang — eco theme hijau/biru/bumi, responsif */
:root {
  --green-900: #1b4332;
  --green-700: #2d6a4f;
  --green-500: #40916c;
  --green-300: #95d5b2;
  --green-100: #d8f3dc;
  --earth: #8b5e34;
  --sky: #caf0f8;
  --ink: #10231a;
  --card: #ffffff;
  --danger: #d90429;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  color: var(--ink);
  background: linear-gradient(160deg, var(--green-100), var(--sky));
  min-height: 100vh;
}

.bg-leaves {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.15;
  background-image: radial-gradient(circle at 20% 30%, var(--green-500) 0 8px, transparent 9px),
    radial-gradient(circle at 80% 20%, var(--green-700) 0 6px, transparent 7px),
    radial-gradient(circle at 60% 80%, var(--earth) 0 7px, transparent 8px);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--green-900);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 5;
}

.logo span { font-weight: 800; }

.layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.hud {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.hud-card {
  background: var(--card);
  border-radius: 12px;
  padding: 10px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  font-size: 14px;
}

.hud-card strong { display: block; font-size: 20px; }

.board-wrap {
  position: relative;
  display: flex;
  justify-content: center;
}

canvas {
  width: min(92vw, 560px);
  height: auto;
  aspect-ratio: 1 / 1;
  background: #f4fbf5;
  border-radius: 16px;
  border: 6px solid var(--green-900);
  box-shadow: 0 10px 30px rgba(27, 67, 50, 0.25);
  touch-action: none;
}

.toast {
  position: absolute;
  top: 12px;
  background: var(--green-900);
  color: #fff;
  padding: 8px 14px;
  border-radius: 999px;
  opacity: 0;
  transform: translateY(-8px);
  transition: 0.25s;
  font-weight: 700;
}

.toast.show { opacity: 1; transform: translateY(0); }

.controls { text-align: center; }

.btn {
  border: none;
  border-radius: 12px;
  padding: 10px 18px;
  font-weight: 800;
  cursor: pointer;
  background: #fff;
  border: 2px solid var(--green-700);
}

.btn-primary { background: var(--green-700); color: #fff; }
.btn-primary:hover { background: var(--green-900); }
.btn-ghost { background: transparent; color: #fff; border-color: #fff; }
.btn-small { padding: 6px 12px; font-size: 13px; margin-top: 8px; }
.panel h2 small { font-size: 12px; opacity: 0.6; font-weight: 400; }

.actions { display: flex; gap: 10px; justify-content: center; }
.hint { opacity: 0.7; font-size: 13px; }

.panel {
  background: var(--card);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

.panel h2 { margin: 8px 0; font-size: 18px; }
.legend { padding-left: 18px; }

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(16, 35, 26, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 10;
}

.overlay.show { display: flex; }

.modal {
  background: #fff;
  border-radius: 18px;
  padding: 24px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  animation: pop 0.3s ease;
}

.modal input {
  width: 100%;
  padding: 10px;
  border-radius: 10px;
  border: 2px solid var(--green-300);
  margin: 12px 0;
}

@keyframes pop {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.footer { text-align: center; padding: 20px; opacity: 0.7; }

@media (min-width: 900px) {
  .layout { grid-template-columns: 1fr 300px; }
  .hud { grid-column: 1 / -1; }
  .board-wrap { grid-column: 1; }
  .controls { grid-column: 1; }
  .panel { grid-column: 2; grid-row: 2 / span 2; }
}

@media (max-width: 600px) {
  .hud { grid-template-columns: repeat(3, 1fr); }
  .hud-card { font-size: 12px; }
  .hud-card strong { font-size: 16px; }
}