:root {
  --bg-0: #f1ece3;
  --bg-1: #d9c7a4;
  --ink: #2f231f;
  --card: rgba(255, 250, 242, 0.88);
  --line: rgba(47, 35, 31, 0.16);
  --accent: #d94e1f;
  --accent-2: #1f6d6f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Space Mono", monospace;
  background:
    radial-gradient(circle at 0% 0%, rgba(255, 255, 255, 0.85) 0%, transparent 40%),
    radial-gradient(circle at 100% 100%, rgba(217, 78, 31, 0.2) 0%, transparent 32%),
    linear-gradient(145deg, var(--bg-0), var(--bg-1));
}

.app-shell {
  width: min(1020px, 94vw);
  margin: 0 auto;
  padding: 1.2rem 0 2rem;
  display: grid;
  gap: 0.9rem;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.1);
}

.kicker {
  margin: 0;
  color: var(--accent-2);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero h1 {
  margin: 0.2rem 0 0;
  font-family: "Bungee", sans-serif;
  font-size: clamp(1.8rem, 6vw, 3.1rem);
}

.subhead {
  margin: 0.3rem 0 0;
  max-width: 70ch;
}

label {
  font-weight: 700;
}

textarea {
  width: 100%;
  margin-top: 0.5rem;
  border: 2px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  padding: 0.8rem;
  font-family: inherit;
  font-size: 1rem;
}

.setup,
.controls {
  display: grid;
  gap: 0.7rem;
}

.mode-row,
.tool-group,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

button {
  border: 2px solid var(--ink);
  border-radius: 12px;
  background: #fdefc8;
  color: var(--ink);
  padding: 0.55rem 0.9rem;
  font-family: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  filter: brightness(0.97);
}

button.ghost {
  background: transparent;
}

button.active {
  background: var(--accent);
  color: #fff8ed;
}

.hint {
  margin: 0;
  font-size: 0.92rem;
}

.shortcuts kbd {
  display: inline-block;
  padding: 0.08rem 0.4rem;
  margin: 0 0.08rem;
  border: 1px solid rgba(47, 35, 31, 0.4);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.85);
  font-family: inherit;
  font-size: 0.85em;
}

.precision-actions button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.sim-panel {
  display: grid;
  gap: 0.7rem;
}

#simCanvas {
  width: 100%;
  height: min(62vh, 540px);
  border-radius: 14px;
  background:
    radial-gradient(circle at 20% 10%, rgba(255, 255, 255, 0.16) 0%, transparent 45%),
    linear-gradient(180deg, #273036 0%, #1f262b 100%);
  border: 2px solid rgba(255, 255, 255, 0.08);
  touch-action: none;
}

.hud {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.5rem;
}

.hud p {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem 0.7rem;
  background: rgba(255, 255, 255, 0.55);
}

@media (max-width: 640px) {
  .app-shell {
    width: 95vw;
  }

  #simCanvas {
    height: 56vh;
  }
}