:root {
  color-scheme: light;
  --series-1: #2a78d6;
  --baseline: #c3c2b7;
  --gridline: #e1e0d9;
  --primary: #0b0b0b;
  --secondary: #52514e;
  --muted: #898781;
  --chart-surface: #fcfcfb;
  --page-plane: #f9f9f7;
  --border: #deddd6;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --series-1: #3987e5;
    --baseline: #383835;
    --gridline: #2c2c2a;
    --primary: #ffffff;
    --secondary: #c3c2b7;
    --muted: #898781;
    --chart-surface: #1a1a19;
    --page-plane: #0d0d0d;
    --border: #30302e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--page-plane);
  color: var(--primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

button { font: inherit; }

.app-shell {
  width: min(100% - 32px, 680px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 48px 0;
  display: grid;
  align-content: center;
}

.screen {
  border: 1px solid var(--border);
  background: var(--chart-surface);
  padding: clamp(24px, 6vw, 48px);
  border-radius: 12px;
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 24px; font-size: clamp(1.45rem, 4vw, 2rem); line-height: 1.2; }
h2 { margin-bottom: 8px; font-size: 1.2rem; }
p { color: var(--secondary); line-height: 1.55; }
.eyebrow { margin-bottom: 12px; color: var(--muted); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }
.status-message { color: var(--secondary); }
.error-message { color: #b23a32; }

.option-list { display: grid; gap: 10px; }
.option-button {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--primary);
  padding: 14px 16px;
  text-align: left;
  cursor: pointer;
}
.option-button:hover, .option-button:focus-visible { border-color: var(--series-1); outline: 2px solid color-mix(in srgb, var(--series-1) 30%, transparent); }
.option-button:disabled { cursor: wait; opacity: .55; }

.results-chart {
  margin-top: 24px;
  padding: 18px 16px;
  background: var(--chart-surface);
  border-top: 1px solid var(--gridline);
  border-bottom: 1px solid var(--gridline);
}
.result-row {
  display: grid;
  grid-template-columns: minmax(7rem, 1fr) minmax(7rem, 2fr) 3.5rem;
  align-items: center;
  gap: 10px;
  min-height: 22px;
}
.result-row + .result-row { margin-top: 2px; }
.result-label, .result-percent { overflow-wrap: anywhere; font-size: .9rem; }
.result-percent { color: var(--secondary); text-align: right; }
.bar-track { height: 7px; background: var(--baseline); }
.bar-fill { height: 100%; min-width: 0; background: var(--series-1); border-radius: 0 4px 4px 0; }
.choice-note { margin: 20px 0 0; color: var(--series-1); font-weight: 600; }
.closed-note { margin: 0 0 20px; color: var(--secondary); }

@media (max-width: 520px) {
  .app-shell { width: min(100% - 20px, 680px); padding: 20px 0; }
  .screen { padding: 24px 18px; }
  .result-row { grid-template-columns: minmax(5rem, 1fr) minmax(5rem, 1.5fr) 3.25rem; gap: 7px; }
}