:root {
  --bg: #f2efe8;
  --paper: #fffdf9;
  --ink: #2b231c;
  --accent: #0c7c59;
  --warn: #c86b00;
  --goal: #b59f00;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 20%, #f7c87366, transparent 35%),
    radial-gradient(circle at 80% 15%, #b8d9c466, transparent 30%),
    linear-gradient(180deg, #f8f4ec, #e8e2d7);
}

.layout {
  width: min(96vw, 1680px);
  margin: 0 auto;
  padding: clamp(0.8rem, 1vw, 1.35rem);
  display: grid;
  gap: clamp(0.8rem, 1vw, 1.15rem);
  grid-template-columns: 1fr;
}

.panel {
  background: var(--paper);
  border: 2px solid #d9cdb6;
  border-radius: 14px;
  padding: 0.95rem 1rem;
  box-shadow: 0 10px 30px #6f5b3b1f;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.35rem, 1.2rem + 0.8vw, 2rem);
}

h2 {
  margin: 0;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #2a3d57;
}

p {
  margin: 0;
  line-height: 1.35;
}

.project-note {
  margin-top: 0.45rem;
  color: #5a4d3f;
}

.credit-line {
  margin-top: 0.35rem;
  font-weight: 700;
}

.credit-line a {
  color: #0c7c59;
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
}

.stats {
  margin-top: 0.75rem;
  font-weight: 700;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.stats span {
  background: #f7f1e6;
  border: 1px solid #d7c7ab;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
}

.controls {
  margin-top: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

label {
  font-weight: 700;
}

select,
button {
  border: 2px solid #8f7d63;
  background: #fffefb;
  color: #2b231c;
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  font-weight: 700;
}

button {
  cursor: pointer;
}

.tutorial {
  margin-top: 0.7rem;
  background: linear-gradient(180deg, #edf5ff, #e3eefb);
  border: 1px solid #c6d4e9;
  border-radius: 10px;
  padding: 0.6rem 0.7rem;
}

#tutorialText {
  margin-top: 0.35rem;
  color: #253446;
}

canvas {
  width: 100%;
  height: auto;
  max-height: 78vh;
  aspect-ratio: 16 / 9;
  border: 2px solid #8f7d63;
  border-radius: 14px;
  background: linear-gradient(180deg, #b5d2df, #dbeff7 45%, #f2f5f4);
  box-shadow: 0 12px 34px #3d3f451f;
}

@media (min-width: 900px) {
  .layout {
    padding: 1.1rem 1.4rem 1.5rem;
  }

  h1 {
    font-size: 1.9rem;
  }
}