:root {
  --ink: #17253d;
  --muted: #657187;
  --line: #dce3eb;
  --soft: #f4f7fa;
  --white: #ffffff;
  --navy: #173f5f;
  --teal: #0f8b8d;
  --teal-dark: #086b6d;
  --mint: #e8f7f5;
  --orange: #f4a261;
  --danger: #b42318;
  --danger-bg: #fff1f0;
  --shadow: 0 12px 35px rgba(23, 37, 61, .08);
  --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 15px/1.55 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--ink); background: #f7f9fb; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
a { color: var(--teal-dark); }
.site-header { height: 72px; padding: 0 max(24px, calc((100vw - 1180px) / 2)); display: flex; align-items: center; justify-content: space-between; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; backdrop-filter: blur(12px); }
.brand { display: flex; gap: 10px; align-items: center; text-decoration: none; color: var(--ink); font-weight: 800; font-size: 20px; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 11px; color: #fff; background: linear-gradient(135deg, var(--navy), var(--teal)); }
.privacy-pill { display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: 999px; color: var(--teal-dark); background: var(--mint); font-size: 13px; font-weight: 700; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #1aa981; box-shadow: 0 0 0 4px rgba(26,169,129,.12); }
.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.hero { display: grid; grid-template-columns: 1.55fr .65fr; gap: 40px; padding: 64px 0 36px; align-items: end; }
.eyebrow, .step-label { margin: 0 0 8px; color: var(--teal-dark); font-weight: 800; text-transform: uppercase; letter-spacing: .11em; font-size: 12px; }
h1 { margin: 0; max-width: 800px; font-size: clamp(42px, 6vw, 72px); line-height: 1.02; letter-spacing: -.055em; }
h1 span { color: var(--teal); }
.lead { max-width: 760px; margin: 22px 0 0; color: var(--muted); font-size: 19px; }
.hero-note { padding: 22px; border: 1px solid #b9e6de; border-radius: var(--radius); background: var(--mint); }
.hero-note strong { font-size: 17px; }
.hero-note p { margin: 8px 0 0; color: #456269; }
.card, .recipient-card, .item-card, .result-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.settings-card { padding: 26px; }
.form-grid { display: grid; gap: 16px; }
.form-grid.four { grid-template-columns: repeat(4, minmax(0,1fr)); }
.form-grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }
.form-grid.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
label { display: grid; gap: 7px; font-size: 13px; color: #445066; font-weight: 700; }
input, select, textarea { width: 100%; min-height: 44px; padding: 10px 12px; color: var(--ink); background: #fff; border: 1px solid #cbd5e1; border-radius: 10px; outline: none; transition: border-color .15s, box-shadow .15s; }
input:focus, select:focus, textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(15,139,141,.13); }
.input-suffix { position: relative; }
.input-suffix input { padding-right: 48px; }
.input-suffix span { position: absolute; right: 12px; top: 11px; color: var(--muted); font-size: 13px; }
.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin: 24px 0 0; }
.steps a { display: flex; gap: 10px; align-items: center; padding: 14px 16px; border-radius: 12px; color: var(--ink); background: #fff; border: 1px solid var(--line); text-decoration: none; font-weight: 750; }
.steps span { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; color: white; background: var(--navy); font-size: 12px; }
.section-block { padding: 68px 0 0; scroll-margin-top: 88px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 22px; }
.section-heading.compact { margin-bottom: 18px; }
.section-heading h2 { margin: 0; font-size: 30px; letter-spacing: -.03em; }
.section-heading p:not(.step-label) { max-width: 760px; margin: 8px 0 0; color: var(--muted); }
.button-row { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.button { min-height: 42px; padding: 10px 15px; border-radius: 10px; border: 1px solid transparent; font-weight: 800; }
.button.primary { color: #fff; background: var(--teal); }
.button.primary:hover { background: var(--teal-dark); }
.button.secondary { color: var(--ink); background: #fff; border-color: #cbd5e1; }
.button.secondary:hover { background: var(--soft); }
.button.danger { color: var(--danger); background: #fff; border-color: #f1c5c1; }
.button.small { min-height: 36px; padding: 7px 11px; font-size: 13px; }
.button[disabled] { cursor: not-allowed; opacity: .55; }
.stack { display: grid; gap: 16px; }
.recipient-card, .item-card { padding: 22px; }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.card-title { display: flex; align-items: center; gap: 12px; }
.card-index { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 10px; background: var(--soft); color: var(--navy); font-weight: 850; }
.card-top h3 { margin: 0; font-size: 18px; }
.recipient-grid { display: grid; grid-template-columns: 1.15fr 1.25fr 1.4fr .9fr; gap: 14px; }
.recipient-grid .wide { grid-column: span 2; }
.inline-check { display: flex; align-items: center; gap: 9px; min-height: 44px; padding: 10px 12px; border: 1px solid #cbd5e1; border-radius: 10px; background: #fff; }
.inline-check input { width: 18px; min-height: 18px; margin: 0; }
.average-box { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 14px; border-radius: 12px; background: var(--mint); color: var(--teal-dark); }
.average-box strong { font-size: 20px; }
.helper { margin-top: 6px; color: var(--muted); font-size: 12px; font-weight: 500; }
.item-grid { display: grid; grid-template-columns: 1.2fr .75fr 1.35fr; gap: 14px; align-items: end; }
.item-extra { margin-top: 14px; }
.recipient-picker { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line); }
.recipient-picker summary { cursor: pointer; color: var(--navy); font-weight: 800; }
.check-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 9px; margin-top: 12px; }
.check-chip { display: flex; align-items: center; gap: 8px; padding: 9px 10px; border-radius: 9px; background: var(--soft); font-size: 13px; }
.check-chip input { width: 16px; min-height: 16px; margin: 0; }
.summary-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; margin-bottom: 18px; }
.summary-card { padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: 14px; }
.summary-card span { color: var(--muted); font-size: 13px; font-weight: 700; }
.summary-card strong { display: block; margin-top: 5px; font-size: 25px; letter-spacing: -.025em; }
.validation { margin: 0 0 16px; padding: 14px 16px; border-radius: 12px; background: var(--danger-bg); color: var(--danger); border: 1px solid #f5c5c0; }
.validation strong { display: block; margin-bottom: 5px; }
.validation ul { margin: 0; padding-left: 20px; }
.ok-box { margin: 0 0 16px; padding: 12px 15px; border-radius: 12px; background: var(--mint); color: var(--teal-dark); border: 1px solid #b9e6de; font-weight: 750; }
.results-list { display: grid; gap: 14px; }
.result-card { overflow: hidden; }
.result-head { display: grid; grid-template-columns: 1.4fr .7fr auto; gap: 18px; align-items: center; padding: 20px 22px; }
.result-head h3 { margin: 0; font-size: 18px; }
.result-meta { color: var(--muted); font-size: 13px; }
.result-total { text-align: right; }
.result-total span { display: block; color: var(--muted); font-size: 12px; font-weight: 700; text-transform: uppercase; }
.result-total strong { font-size: 25px; color: var(--teal-dark); }
.result-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.result-details { border-top: 1px solid var(--line); padding: 0 22px 20px; }
.result-details summary { padding: 15px 0; cursor: pointer; font-weight: 800; color: var(--navy); }
.calc-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.calc-table th { padding: 9px 8px; text-align: left; color: var(--muted); border-bottom: 1px solid var(--line); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; }
.calc-table td { padding: 10px 8px; border-bottom: 1px solid #edf1f5; vertical-align: top; }
.calc-table td:last-child, .calc-table th:last-child { text-align: right; white-space: nowrap; }
.calc-table .muted-row { color: #8a94a6; }
.toast { position: fixed; right: 24px; bottom: 24px; max-width: min(420px, calc(100% - 48px)); padding: 14px 17px; color: #fff; background: var(--ink); border-radius: 12px; box-shadow: 0 16px 45px rgba(0,0,0,.2); transform: translateY(120px); opacity: 0; transition: .25s ease; z-index: 40; }
.toast.show { transform: translateY(0); opacity: 1; }
.toast.error { background: var(--danger); }
footer { padding: 58px 20px 32px; text-align: center; color: var(--muted); }
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; align-items: start; }
  .form-grid.four, .summary-grid { grid-template-columns: repeat(2,1fr); }
  .recipient-grid, .item-grid { grid-template-columns: repeat(2,1fr); }
  .check-grid { grid-template-columns: repeat(2,1fr); }
  .result-head { grid-template-columns: 1fr auto; }
  .result-actions { grid-column: 1 / -1; justify-content: flex-start; }
}
@media (max-width: 620px) {
  .site-header { height: 64px; padding: 0 16px; }
  .privacy-pill { font-size: 0; padding: 10px; }
  .privacy-pill .status-dot { margin: 0; }
  .shell { width: min(100% - 22px, 1180px); }
  .hero { padding-top: 40px; gap: 24px; }
  h1 { font-size: 42px; }
  .lead { font-size: 17px; }
  .steps { grid-template-columns: 1fr; }
  .section-heading { align-items: stretch; flex-direction: column; }
  .section-heading .button, .button-row .button { width: 100%; }
  .button-row { width: 100%; }
  .form-grid.four, .form-grid.three, .form-grid.two, .summary-grid, .recipient-grid, .item-grid, .check-grid { grid-template-columns: 1fr; }
  .recipient-grid .wide { grid-column: auto; }
  .recipient-card, .item-card, .settings-card { padding: 17px; }
  .result-head { grid-template-columns: 1fr; }
  .result-total { text-align: left; }
  .result-actions { grid-column: auto; }
  .result-actions .button { flex: 1 1 140px; }
  .calc-table { display: block; overflow-x: auto; }
}