:root {
  --bg1: #fff5fb;
  --bg2: #eef8ff;
  --ink: #22233a;
  --soft: #686c88;
  --line: rgba(34, 35, 58, 0.12);
  --accent: #7658ff;
  --accent-dark: #5b3ee0;
  --card: rgba(255, 255, 255, 0.9);
  --shadow: 0 18px 46px rgba(76, 61, 138, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 187, 220, 0.65), transparent 30%),
    radial-gradient(circle at top right, rgba(166, 225, 255, 0.7), transparent 32%),
    linear-gradient(180deg, var(--bg1), var(--bg2));
}

h1 {
  font-family: "Trebuchet MS", Arial, sans-serif;
}

button,
input {
  font: inherit;
}

.shell {
  width: min(1440px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0 2rem;
}

.appLayout {
  display: grid;
  grid-template-columns: minmax(270px, 30fr) minmax(0, 70fr);
  gap: 1rem;
  align-items: start;
}

.card {
  background: var(--card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.sidePanel {
  position: sticky;
  top: 1rem;
  min-height: calc(100vh - 2rem);
  padding: clamp(1rem, 2vw, 1.5rem);
  display: flex;
  flex-direction: column;
}

.hero {
  margin-bottom: 1.4rem;
}

.eyebrow {
  margin: 0 0 0.45rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: clamp(2.7rem, 5vw, 4.7rem);
  line-height: 0.96;
  letter-spacing: -0.055em;
}

.intro {
  margin: 1rem 0 0;
  color: var(--soft);
  line-height: 1.62;
  font-size: 1rem;
}

.controls {
  display: grid;
  gap: 1rem;
}

.field {
  display: grid;
  gap: 0.45rem;
  font-weight: 750;
}

.field input {
  width: 100%;
  min-height: 50px;
  border-radius: 15px;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
  padding: 0.8rem 0.95rem;
}

.buttonRow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
}

button {
  width: 100%;
  min-height: 46px;
  padding: 0.72rem 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 700;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(50, 44, 101, 0.12);
}

button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(118, 88, 255, 0.28);
  outline-offset: 2px;
}

.primary {
  background: var(--accent);
  border-color: transparent;
  color: #ffffff;
}

.primary:hover {
  background: var(--accent-dark);
}

.helpText {
  margin-top: auto;
  padding-top: 1.25rem;
}

.helpText p {
  margin: 0;
}

#statusText {
  font-weight: 750;
  line-height: 1.45;
}

.hint {
  margin-top: 0.55rem !important;
  color: var(--soft);
  font-size: 0.88rem;
  line-height: 1.5;
}

.visualPanel {
  min-width: 0;
  display: grid;
  gap: 1rem;
}

.workspace {
  padding: 0.75rem;
  overflow: hidden;
}

canvas {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  border-radius: 18px;
  background: #f8faff;
}

.legend {
  padding: 1rem;
}

.legend h2 {
  margin: 0 0 0.8rem;
  font-size: 1.05rem;
}

.legendGrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: 0.55rem;
}

.legendItem {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.82);
  padding: 0.65rem 0.75rem;
  font-size: 0.92rem;
}

.legendItem b {
  display: inline-block;
  min-width: 1.4rem;
}

.legendItem span {
  color: var(--soft);
  font-size: 0.82rem;
}

@media (max-width: 900px) {
  .shell {
    width: min(100% - 1rem, 900px);
    padding-top: 0.5rem;
  }

  .appLayout {
    grid-template-columns: 1fr;
  }

  .sidePanel {
    position: static;
    min-height: auto;
  }

  .buttonRow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .helpText {
    margin-top: 1rem;
  }
}

@media (max-width: 540px) {
  .buttonRow {
    grid-template-columns: 1fr;
  }

  .sidePanel,
  .workspace,
  .legend {
    border-radius: 18px;
  }
}