:root {
  color-scheme: light;
  --ink: #18202a;
  --muted: #5f6976;
  --line: #d9e1e4;
  --paper: #f6f8f5;
  --panel: #ffffff;
  --aqua: #1d8a8a;
  --aqua-dark: #13686a;
  --coral: #d45f4b;
  --amber: #d2a13a;
  --green: #4b8d5d;
  --blue: #496e9f;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(29,138,138,.08), transparent 34rem),
    var(--paper);
}

button, input, select, textarea { font: inherit; }

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 1.1rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.88);
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(14px);
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(2rem, 5vw, 4.2rem); letter-spacing: 0; }
h2 { margin-bottom: .65rem; font-size: 1.25rem; }
.eyebrow { margin-bottom: .15rem; color: var(--aqua-dark); font-weight: 800; text-transform: uppercase; font-size: .78rem; }

.top-actions, footer, .button-row, .legend, .tabs {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-wrap: wrap;
}

a { color: var(--aqua-dark); font-weight: 800; text-decoration: none; }
.pill, button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 8px;
  padding: .68rem .9rem;
  font-weight: 800;
  cursor: pointer;
}
.pill.active, button:hover, .tab.active {
  background: var(--aqua);
  border-color: var(--aqua);
  color: #fff;
}

.shell { padding: clamp(1rem, 3vw, 2rem); }
.workspace {
  max-width: 1240px;
  margin: 0 auto;
}
.tabs { margin-bottom: 1rem; }
.tab { min-width: 7rem; }

.view { display: none; }
.view.active { display: block; }

.panel, .canvas-wrap, .score-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 40px rgba(24,32,42,.08);
}
.intro-panel { padding: 1.1rem; margin-bottom: 1rem; }
.intro-panel p { color: var(--muted); max-width: 68ch; margin-bottom: 0; line-height: 1.55; }

.grid { display: grid; gap: .85rem; }
.form-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
label {
  display: grid;
  gap: .42rem;
  padding: .9rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
}
label span { color: var(--muted); font-size: .82rem; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .72rem;
  color: var(--ink);
  background: #fbfcfd;
}
input[type="range"] { padding: .35rem 0; accent-color: var(--aqua); }

.map-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 1rem;
}
.canvas-wrap { padding: .75rem; min-height: 420px; }
canvas { display: block; width: 100%; height: auto; border-radius: 6px; background: #eef3f4; }
.score-panel { padding: 1rem; align-self: start; }
.score-list { display: grid; gap: .7rem; }
.score-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: .5rem;
  align-items: center;
  padding-bottom: .65rem;
  border-bottom: 1px solid var(--line);
}
.score-row strong { font-size: 1.45rem; }
.score-row span { color: var(--muted); font-weight: 800; }
.legend { margin-top: 1rem; color: var(--muted); font-size: .85rem; font-weight: 800; }
.swatch { width: 1rem; height: 1rem; border-radius: 999px; display: inline-block; }
.good { background: var(--green); }
.warn { background: var(--amber); }
.bad { background: var(--coral); }

.plan-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.plan-grid .panel { padding: 1rem; }
.wide { grid-column: 1 / -1; }
ol { padding-left: 1.35rem; line-height: 1.7; }
.chips { display: flex; gap: .55rem; flex-wrap: wrap; }
.chip {
  padding: .58rem .72rem;
  border-radius: 999px;
  background: #edf6f5;
  border: 1px solid #bee0dd;
  color: var(--aqua-dark);
  font-weight: 800;
}
textarea { resize: vertical; min-height: 9rem; line-height: 1.45; }
.status { min-height: 1.2rem; color: var(--green); font-weight: 800; margin: .75rem 0 0; }
footer { justify-content: center; padding: 1.5rem; }

@media (max-width: 900px) {
  .form-grid, .map-layout, .plan-grid { grid-template-columns: 1fr; }
  .topbar { align-items: flex-start; }
}

@media (max-width: 560px) {
  .topbar { display: grid; }
  .tab { flex: 1 1 30%; min-width: 0; }
  .shell { padding: .75rem; }
  h1 { font-size: 2.35rem; }
}