:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: rgba(18, 27, 52, 0.82);
  --panel-solid: #121b34;
  --line: rgba(148, 163, 184, 0.22);
  --text: #eef2ff;
  --muted: #94a3b8;
  --accent: #7dd3fc;
  --accent-2: #38bdf8;
  --good: #86efac;
  --warn: #fde68a;
  --danger: #fca5a5;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.32);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.22), transparent 34rem),
    radial-gradient(circle at bottom right, rgba(99, 102, 241, 0.16), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, input { font: inherit; }

.shell {
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  font-size: 12px;
}

h1, h2, p { margin-top: 0; }

h1 {
  margin-bottom: 16px;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 0.95;
  letter-spacing: -0.055em;
}

h2 {
  margin-bottom: 0;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.heroText {
  max-width: 760px;
  color: #cbd5e1;
  font-size: 18px;
  line-height: 1.65;
}

.heroCard, .panel, .priceCard {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.heroCard {
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
}

.heroCard span, .priceCard span {
  color: var(--muted);
  font-size: 14px;
}

.heroCard strong {
  font-size: 28px;
  letter-spacing: -0.035em;
}

.heroCard small, .priceCard small {
  color: #cbd5e1;
  line-height: 1.5;
}

.layout {
  display: grid;
  grid-template-columns: 520px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.panel {
  padding: 24px;
}

.panelHeader {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.grid {
  display: grid;
  gap: 16px;
}

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

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: #cbd5e1;
  font-size: 13px;
  line-height: 1.25;
}

.field input {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.26);
  background: rgba(15, 23, 42, 0.82);
  color: var(--text);
  border-radius: 14px;
  padding: 13px 14px;
  outline: none;
  transition: border 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.field input:focus {
  border-color: rgba(125, 211, 252, 0.72);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.12);
  background: rgba(15, 23, 42, 0.96);
}

.ghost {
  border: 1px solid rgba(125, 211, 252, 0.28);
  background: rgba(56, 189, 248, 0.08);
  color: var(--accent);
  border-radius: 999px;
  padding: 9px 14px;
  cursor: pointer;
}

.ghost:hover { background: rgba(56, 189, 248, 0.14); }

.advanced {
  margin-top: 20px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.advanced summary {
  cursor: pointer;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 18px;
}

.advancedGrid { margin-top: 16px; }

.status {
  margin: 18px 0 0;
  min-height: 24px;
  color: var(--muted);
  font-size: 14px;
}

.status.error { color: var(--danger); }

.results {
  display: grid;
  gap: 24px;
}

.priceCards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.priceCard {
  padding: 22px;
  min-height: 170px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}

.priceCard strong {
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: -0.05em;
  line-height: 1;
}

.priceCard.self strong { color: var(--good); }
.priceCard.friends strong { color: var(--warn); }
.priceCard.commercial strong { color: var(--danger); }

.rows {
  display: grid;
  gap: 10px;
}

.row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
  color: #cbd5e1;
}

.row:last-child { border-bottom: 0; }
.row strong { color: var(--text); white-space: nowrap; }

.explanation {
  color: #cbd5e1;
  line-height: 1.6;
}

.explanation p:last-child { margin-bottom: 0; }

@media (max-width: 1080px) {
  .hero, .layout { grid-template-columns: 1fr; }
  .heroCard { max-width: none; }
}

@media (max-width: 760px) {
  .shell { width: min(100% - 20px, 1280px); padding-top: 24px; }
  .grid.two, .priceCards { grid-template-columns: 1fr; }
  .panel, .heroCard, .priceCard { border-radius: 22px; padding: 20px; }
  .panelHeader { align-items: flex-start; flex-direction: column; }
  .ghost { width: 100%; }
}