:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #18202a;
  --muted: #5f6c7b;
  --line: #dbe3ee;
  --brand: #1459ff;
  --brand-dark: #0d42bf;
  --accent: #eef4ff;
  --success: #0f8f5b;
  --shadow: 0 18px 50px rgba(22, 34, 51, 0.08);
  --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}
a { color: inherit; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.top-strip {
  background: #0f1722;
  color: #dfe8f4;
  padding: 12px 16px;
  text-align: center;
  font-size: 0.92rem;
}
.hero {
  padding: 56px 0 32px;
  background: linear-gradient(180deg, #eef4ff 0%, #f5f7fb 100%);
}
.hero-grid, .calc-grid, .reminder-grid, .clarity-grid { display: grid; gap: 24px; }
.hero-grid { grid-template-columns: 1.5fr 0.9fr; align-items: start; }
.eyebrow {
  font-weight: 700; color: var(--brand); letter-spacing: 0.01em; margin-bottom: 16px;
}
h1, h2, h3 { line-height: 1.1; margin: 0 0 14px; }
h1 { font-size: clamp(2.2rem, 4vw, 4rem); max-width: 13ch; }
.subheadline { font-size: 1.08rem; color: var(--muted); max-width: 62ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0; }
.btn {
  border: 0; border-radius: 999px; padding: 14px 20px; font-weight: 700;
  cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-secondary { background: var(--accent); color: var(--brand-dark); }
.btn-full { width: 100%; }
.trust-points, .legal-list { padding-left: 18px; color: var(--muted); }
.hero-card, .panel, .clarity-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.hero-card { padding: 24px; }
.hero-card ol { padding-left: 18px; color: var(--muted); }
.mini-note { color: var(--muted); font-size: 0.94rem; }
.section { padding: 32px 0; }
.section-alt { background: #edf2f8; }
.section-head { margin-bottom: 20px; }
.clarity-grid { grid-template-columns: repeat(2, 1fr); }
.clarity-card { padding: 22px; }
.calc-grid { grid-template-columns: 1.05fr 0.95fr; }
.panel { padding: 24px; }
.field-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
label span { display: block; font-weight: 600; margin-bottom: 8px; }
input, select, textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 12px; background: #fff;
  padding: 14px 14px; font: inherit; color: var(--text);
}
textarea { min-height: 168px; resize: vertical; }
.form-help { color: var(--muted); font-size: 0.95rem; }
.checkbox-row { display: flex; gap: 10px; align-items: center; padding-top: 28px; }
.checkbox-row input { width: auto; transform: scale(1.12); }
.empty-state {
  padding: 20px; border: 1px dashed var(--line); border-radius: 14px; color: var(--muted); background: #fafcff;
}
.hidden { display: none; }
.result-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-bottom: 16px; }
.result-card {
  border: 1px solid var(--line); border-radius: 16px; padding: 18px; background: #fbfdff;
}
.result-card span { display: block; color: var(--muted); margin-bottom: 8px; }
.result-card strong { font-size: 1.45rem; }
.result-card.total { grid-column: 1 / -1; background: #eef8f3; }
.explain-box {
  margin-top: 14px; border-top: 1px solid var(--line); padding-top: 16px;
}
.copy-btn { margin-top: 12px; }
.reminder-grid { grid-template-columns: repeat(2, 1fr); }
.faq-list { display: grid; gap: 12px; }
details {
  background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px;
}
summary { font-weight: 700; cursor: pointer; }
.site-footer {
  padding: 24px 0 40px; background: #0f1722; color: #e7eef9; margin-top: 24px;
}
.footer-wrap {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
}
.footer-wrap nav { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-wrap a { text-decoration: none; color: #e7eef9; }
.toast {
  position: fixed; right: 16px; bottom: 16px; background: #0f1722; color: #fff; padding: 12px 16px;
  border-radius: 999px; box-shadow: var(--shadow); z-index: 20;
}
.toast-success { background: #0f1722; }
.toast-error { background: #9f1239; }
@media (max-width: 860px) {
  .hero-grid, .calc-grid, .reminder-grid, .clarity-grid, .field-grid, .result-cards { grid-template-columns: 1fr; }
  h1 { max-width: 100%; }
  .checkbox-row { padding-top: 0; }
  .hero { padding-top: 34px; }
}