:root {
  --bg: #f5f3ff;
  --surface: #ffffff;
  --ink: #1e1b4b;
  --muted: #6366a0;
  --indigo: #4f46e5;
  --violet: #7c3aed;
  --band: rgba(79, 70, 229, 0.18);
  --up: #059669;
  --down: #dc2626;
  --border: #e0e7ff;
  --shadow: 0 10px 30px rgba(79, 70, 229, 0.08);
  --radius: 1rem;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  min-height: 100vh;
  background:
    radial-gradient(900px 400px at 100% 0%, #ddd6fe 0%, transparent 55%),
    radial-gradient(700px 360px at 0% 20%, #e0e7ff 0%, transparent 50%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.5;
  padding: 0 1rem 2rem;
}

.hero {
  padding: 1.75rem 0 1.25rem;
}
.hero-inner {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.logo-row { display: flex; gap: 0.85rem; align-items: center; }
.logo { width: 2.5rem; height: 2.5rem; flex-shrink: 0; }
h1 {
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.subtitle { color: var(--muted); font-size: 0.92rem; }
.pill {
  background: #eef2ff;
  color: var(--indigo);
  border: 1px solid var(--border);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
}

.shell {
  max-width: 920px;
  margin: 0 auto;
  display: grid;
  gap: 1.1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.4rem;
  box-shadow: var(--shadow);
}
.card h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--indigo);
  margin-bottom: 0.35rem;
}
.lede { color: var(--muted); font-size: 0.92rem; margin-bottom: 1.1rem; }
.lede code {
  background: #eef2ff;
  color: var(--violet);
  padding: 0.1rem 0.35rem;
  border-radius: 0.3rem;
  font-size: 0.85rem;
}

.fields {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
}
.fields label { display: flex; flex-direction: column; gap: 0.35rem; }
.fields label > span {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
}
.fields input[type="number"] {
  border: 1.5px solid var(--border);
  border-radius: 0.65rem;
  padding: 0.7rem 0.8rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  background: #fafaff;
}
.fields input[type="number"]:focus {
  outline: none;
  border-color: var(--indigo);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}
.check {
  grid-column: 1 / -1;
  flex-direction: row !important;
  align-items: center;
  gap: 0.55rem !important;
  margin-top: 0.25rem;
  font-size: 0.9rem;
  color: var(--ink);
}
.check em { color: var(--muted); font-style: normal; font-size: 0.82rem; }
.check input { width: 1.05rem; height: 1.05rem; accent-color: var(--indigo); }

.estimate-note {
  background: linear-gradient(90deg, #eef2ff, #f5f3ff);
  border-left: 3px solid var(--violet);
  padding: 0.65rem 0.85rem;
  border-radius: 0 0.55rem 0.55rem 0;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.1rem;
}
.estimate-note strong { color: var(--violet); }

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.35rem;
}
.metric {
  background: #f8f7ff;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.85rem;
}
.metric .label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.3rem;
}
.metric .val {
  font-size: 1.25rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}
.metric .val.up { color: var(--up); }
.metric .val.down { color: var(--down); }

.axis-wrap { margin-bottom: 1.1rem; }
.axis-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.4rem;
}
.axis {
  position: relative;
  height: 3.2rem;
  background: linear-gradient(90deg, #f1f5f9, #e2e8f0, #f1f5f9);
  border-radius: 999px;
  border: 1px solid #cbd5e1;
  overflow: visible;
}
.band {
  position: absolute;
  top: 0.35rem;
  bottom: 0.35rem;
  background: var(--band);
  border: 1.5px solid rgba(79, 70, 229, 0.45);
  border-radius: 999px;
  left: 25%;
  width: 50%;
  transition: left 0.2s ease, width 0.2s ease;
}
.spot-mark {
  position: absolute;
  top: -0.2rem;
  bottom: -0.2rem;
  width: 4px;
  margin-left: -2px;
  background: var(--indigo);
  border-radius: 2px;
  left: 50%;
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.2);
  transition: left 0.2s ease;
}
.tick {
  position: absolute;
  top: 50%;
  width: 8px;
  height: 8px;
  margin: -4px 0 0 -4px;
  border-radius: 50%;
  background: var(--violet);
  transition: left 0.2s ease;
}
.axis-caption {
  margin-top: 0.55rem;
  font-size: 0.8rem;
  color: var(--violet);
  font-weight: 600;
}

.bullets {
  padding-left: 1.15rem;
  color: var(--muted);
  font-size: 0.86rem;
}
.bullets li { margin-bottom: 0.3rem; }

.foot {
  max-width: 920px;
  margin: 1.5rem auto 0;
  padding: 1rem 1.15rem;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  font-size: 0.82rem;
  color: var(--muted);
}
.foot strong { color: var(--violet); }
.foot .meta { margin-top: 0.4rem; font-size: 0.75rem; }

@media (max-width: 720px) {
  .fields { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr 1fr; }
}