:root {
  color-scheme: light;
  --bg: #f3f5f9;
  --panel: #ffffff;
  --panel-soft: #f7f9fd;
  --border: #d6deea;
  --text: #0f1726;
  --muted: #5d6d82;
  --accent: #1f5eff;
  --accent-2: #0f9d58;
  --shadow: 0 18px 50px rgba(15, 23, 38, 0.08);
  font-family: Inter, Segoe UI, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(31, 94, 255, 0.10), transparent 28%),
    radial-gradient(circle at top right, rgba(15, 157, 88, 0.08), transparent 24%),
    linear-gradient(180deg, #fbfcfe 0%, #eef2f7 100%);
}

body {
  overflow-x: hidden;
}

.app-shell {
  width: min(1400px, calc(100% - 20px));
  margin: 0 auto;
  padding: 6px 0 10px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.page-head {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 14px;
  padding: 14px 16px;
  align-items: center;
  grid-column: 1 / -1;
}

.eyebrow {
  display: inline-flex;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(31, 94, 255, 0.08);
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 800;
}

h1 {
  margin: 6px 0 4px;
  font-size: clamp(1.6rem, 2.6vw, 2.25rem);
  line-height: 1.03;
  letter-spacing: -0.04em;
}

.lead {
  margin: 0;
  max-width: 68ch;
  color: var(--muted);
  line-height: 1.45;
  font-size: 1rem;
}

.head-note {
  justify-self: end;
  display: grid;
  gap: 4px;
  min-width: 240px;
  padding: 12px 14px;
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.note-title {
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.note-value {
  font-weight: 800;
  font-size: 1rem;
}

.note-help {
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-strip {
  padding: 8px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  grid-column: 1 / -1;
}

.hero-chip {
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #fff 0%, #f7f9fd 100%);
  border-radius: 14px;
  padding: 10px 12px;
}

.chip-label {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.chip-value {
  display: block;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.15;
}

.calculator {
  padding: 14px;
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 14px;
  min-width: 0;
}

.inputs,
.output {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px;
}

.section-title {
  margin-bottom: 10px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  font-weight: 800;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.field {
  display: grid;
  gap: 6px;
}

.field span {
  color: var(--muted);
  font-size: 0.86rem;
}

input,
select {
  width: 100%;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 12px;
  padding: 9px 10px;
  font: inherit;
  outline: none;
}

input:focus,
select:focus {
  border-color: rgba(31, 94, 255, 0.8);
  box-shadow: 0 0 0 3px rgba(31, 94, 255, 0.12);
}

.toggle-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

.toggle-row label {
  display: flex;
  gap: 8px;
  align-items: center;
}

.toggle-row input {
  width: auto;
}

.result-frame {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px;
}

.result-main {
  font-size: clamp(1.8rem, 3vw, 2.45rem);
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 1;
}

.result-subtitle {
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.35;
  font-size: 0.92rem;
}

.breakdown {
  margin-top: 10px;
  display: grid;
  gap: 7px;
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 11px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--border);
}

.breakdown-row span:first-child {
  color: var(--muted);
}

.breakdown-row span:last-child {
  font-weight: 700;
}

code {
  color: var(--accent-2);
}

@media (max-width: 1140px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .page-head,
  .calculator {
    grid-template-columns: 1fr;
  }

  .page-head,
  .hero-strip,
  .calculator {
    grid-column: auto;
  }

  .head-note {
    justify-self: start;
  }
}

@media (max-width: 780px) {
  .app-shell {
    width: min(100% - 10px, 1360px);
    padding: 4px 0 6px;
  }

  .hero-strip,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .page-head,
  .calculator,
  .inputs,
  .output {
    padding: 10px;
  }
}