:root {
  --accent: #1f6feb;
  --accent-dark: #1a5fcc;
  --text: #1a1a1a;
  --muted: #555;
  --border: #e5e7eb;
  --bg: #ffffff;
  --card-bg: #fafafa;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

h1 {
  font-size: 2rem;
  line-height: 1.2;
  margin: 0 0 0.5rem;
}

.subhead {
  color: var(--muted);
  margin: 0 0 2rem;
}

h2 {
  font-size: 1.2rem;
  margin: 0 0 0.75rem;
}

h3 {
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
}

/* Form */
form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  border: 0;
  padding: 0;
  margin: 0;
}

label,
legend {
  font-weight: 600;
}

legend {
  padding: 0;
  margin-bottom: 0.4rem;
}

select {
  padding: 0.6rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.radio-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.radio-row label {
  font-weight: 400;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

input[type="radio"] {
  accent-color: var(--accent);
}

/* Tooltip hint */
.hint {
  position: relative;
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--accent);
  cursor: help;
  text-decoration: underline dotted;
  width: fit-content;
}

.hint-bubble {
  position: absolute;
  left: 0;
  top: 1.6rem;
  z-index: 10;
  width: 16rem;
  max-width: 80vw;
  padding: 0.6rem 0.75rem;
  background: var(--text);
  color: #fff;
  font-size: 0.85rem;
  line-height: 1.4;
  border-radius: 6px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.12s ease;
}

.hint:hover .hint-bubble,
.hint:focus .hint-bubble {
  opacity: 1;
  visibility: visible;
}

/* CTA */
.cta {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 6px;
  padding: 0.85rem 1.25rem;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
}

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

.form-error {
  color: #b91c1c;
  font-weight: 600;
  margin: 0;
}

/* Results */
.results {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  background: var(--card-bg);
}

.range {
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text);
}

.verdict {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.breakdown {
  margin: 0 0 0.5rem;
  color: var(--muted);
}

.circuit-note {
  margin: 0 0 0.5rem;
  font-weight: 600;
  color: var(--accent);
}

.fine-print {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.5rem 0 0;
}

#state-rebate {
  margin-top: 0.75rem;
}

a {
  color: var(--accent);
}

.vary {
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
}

.vary ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.vary li {
  margin-bottom: 0.4rem;
}

.about {
  margin-top: 3rem;
  color: var(--muted);
}

.about h2 {
  color: var(--text);
}

footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.6rem;
  }
  .range {
    font-size: 1.5rem;
  }
  .container {
    padding: 1.5rem 1rem 3rem;
  }
}