:root {
  color-scheme: light;
  --ink: #102a43;
  --ink-soft: #334e68;
  --blue: #2e5d75;
  --blue-deep: #173b4f;
  --blue-pale: #dce9ed;
  --paper: #ffffff;
  --ground: #eef3f5;
  --line: #cfdbe0;
  --line-dark: #9fb3bd;
  --quiet: #627d8b;
  --signal: #b84f2e;
  --signal-pale: #f6e7e1;
  --success: #1f6a52;
  --success-pale: #e2f0eb;
  --error: #9d2f2f;
  --error-pale: #f7e7e7;
  --radius: 6px;
  --shadow: 0 12px 28px rgba(16, 42, 67, 0.08);
  --sans: "Avenir Next", "Aptos", "Helvetica Neue", Arial, sans-serif;
  --condensed: "Avenir Next Condensed", "Arial Narrow", "Aptos Narrow", "Helvetica Neue", sans-serif;
  --mono: "SFMono-Regular", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
}
button, input { font: inherit; }
a { color: inherit; }

:focus-visible {
  outline: 3px solid rgba(184, 79, 46, 0.45);
  outline-offset: 3px;
}

.site-header {
  background:
    linear-gradient(rgba(159, 179, 189, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 179, 189, 0.18) 1px, transparent 1px),
    #f8fafb;
  background-size: 36px 36px;
  border-bottom: 1px solid var(--line-dark);
}

.topbar {
  width: min(1220px, calc(100% - 40px));
  min-height: 74px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: inline-grid;
  grid-template-columns: auto auto auto;
  align-items: baseline;
  gap: 5px;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--condensed);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.wordmark span:first-child { color: var(--blue); }
.wordmark small {
  margin-left: 4px;
  padding: 1px 4px;
  border: 1px solid var(--line-dark);
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.04em;
}

.nav-links { display: flex; flex-wrap: wrap; gap: 24px; }
.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-family: var(--condensed);
  font-size: 0.92rem;
  font-weight: 600;
}
.nav-links a:hover { color: var(--signal); }

.intro {
  width: min(1220px, calc(100% - 40px));
  margin: 0 auto;
  padding: 70px 0 58px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(480px, 0.9fr);
  gap: 70px;
  align-items: end;
}

.edition-line,
.section-kicker,
.sheet-code {
  margin: 0;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.intro h1 {
  max-width: 690px;
  margin: 12px 0 20px;
  font-family: var(--condensed);
  font-size: clamp(3.15rem, 6.3vw, 6.4rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.89;
}
.intro-copy > p:last-child {
  max-width: 665px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.period-register {
  border-top: 3px solid var(--ink);
  border-bottom: 1px solid var(--line-dark);
}
.register-cell {
  padding: 17px 0;
  display: grid;
  grid-template-columns: 86px 145px 1fr;
  gap: 14px;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
}
.register-cell:last-child { border-bottom: 0; }
.register-cell strong {
  font-family: var(--condensed);
  font-size: 1.06rem;
  letter-spacing: -0.01em;
}
.register-cell small { color: var(--quiet); }
.register-date {
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 600;
}
.register-cell--total { background: var(--blue-pale); }
.register-cell--total > *:first-child { margin-left: 10px; }
.register-arrow { display: none; }

.page-shell {
  width: min(1220px, calc(100% - 40px));
  margin: 0 auto 90px;
}

.notice {
  margin-top: -1px;
  padding: 20px 0;
  display: grid;
  grid-template-columns: 170px 1fr auto;
  gap: 26px;
  align-items: center;
  border-bottom: 1px solid var(--line-dark);
}
.notice-label {
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.notice p { margin: 0; color: var(--ink-soft); }
.notice p strong { color: var(--ink); }
.notice-actions { display: flex; gap: 8px; }

.rate-sheet,
.sheet-panel,
.carry-sheet,
.monthly-summary,
.documentation-card {
  background: var(--paper);
  border: 1px solid var(--line-dark);
  box-shadow: var(--shadow);
}

.rate-sheet {
  margin-top: 32px;
  display: grid;
  grid-template-columns: minmax(300px, 1.2fr) minmax(240px, 0.75fr) minmax(210px, 0.55fr);
  gap: 0;
}
.rate-sheet > * { padding: 27px 30px; }
.rate-sheet > * + * { border-left: 1px solid var(--line); }
.sheet-heading { display: grid; grid-template-columns: 68px 1fr; gap: 20px; }
.sheet-heading h2,
.period-heading h2,
.documentation-card h2 {
  margin: 3px 0 5px;
  font-family: var(--condensed);
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1;
}
.sheet-heading p:last-child,
.period-heading p:last-child,
.documentation-card p { margin: 0; color: var(--quiet); }

.field { display: grid; gap: 7px; }
.field > span {
  color: var(--ink-soft);
  font-family: var(--condensed);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.field input {
  width: 100%;
  min-height: 45px;
  padding: 10px 12px;
  border: 1px solid var(--line-dark);
  border-radius: 2px;
  background: #fbfcfd;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
  transition: border-color 140ms ease, background 140ms ease;
}
.field input:hover { border-color: var(--blue); }
.field input:focus { border-color: var(--signal); background: white; outline: 0; box-shadow: inset 3px 0 var(--signal); }
.field input[readonly] { background: #eaf0f3; color: var(--ink-soft); }

.currency-input {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  border: 1px solid var(--line-dark);
  background: #fbfcfd;
}
.currency-input:focus-within { border-color: var(--signal); box-shadow: inset 3px 0 var(--signal); background: white; }
.currency-input b {
  padding: 0 12px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}
.currency-input input { border: 0; background: transparent; box-shadow: none !important; }
.field--rate input { min-height: 55px; font-size: 1.15rem; }

.rate-preview {
  display: grid;
  align-content: center;
  gap: 9px;
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.76rem;
}
.rate-preview span { display: flex; justify-content: space-between; gap: 20px; }
.rate-preview strong { color: var(--ink); font-weight: 600; }

.status {
  margin-top: 18px;
  padding: 12px 14px;
  border-left: 4px solid var(--blue);
  background: var(--blue-pale);
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.status[data-type="success"] { border-color: var(--success); background: var(--success-pale); }
.status[data-type="error"] { border-color: var(--error); background: var(--error-pale); color: var(--error); }

.period { padding-top: 92px; scroll-margin-top: 16px; }
.period-heading {
  margin-bottom: 23px;
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
}
.period-heading--summary { grid-template-columns: 82px minmax(0, 1fr); }
.period-stamp {
  width: 74px;
  min-height: 78px;
  padding: 10px 8px;
  display: grid;
  align-content: space-between;
  border: 1px solid var(--ink);
  background: var(--paper);
  font-family: var(--mono);
  line-height: 1;
}
.period-stamp span { color: var(--signal); font-size: 0.72rem; }
.period-stamp b { font-size: 1.55rem; font-weight: 500; }
.period-stamp--end b { font-size: 1rem; }
.period-stamp--month { background: var(--blue-deep); color: white; }
.period-tag {
  padding-bottom: 4px;
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
}

.form-grid { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.75fr); gap: 20px; }
.sheet-panel { padding: 0 28px 24px; }
.panel-heading,
.results-heading {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
  border-bottom: 1px solid var(--line-dark);
}
.panel-heading h3,
.results-heading h3,
.result-group h3 {
  margin: 0;
  font-family: var(--condensed);
  font-weight: 600;
  letter-spacing: -0.015em;
}
.panel-heading span,
.results-heading > span { color: var(--quiet); font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; }
.results-heading > div { display: grid; gap: 4px; }

.fields-grid {
  padding-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px 16px;
}
.fields-grid--compact { grid-template-columns: 1fr; }

.carry-sheet {
  margin-bottom: 20px;
  padding: 24px 28px;
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) 1fr;
  gap: 35px;
  align-items: end;
}
.field--carry { margin-top: 10px; }
.checkbox-field {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--quiet);
  font-size: 0.9rem;
}
.checkbox-field input {
  width: 17px;
  height: 17px;
  margin: 3px 0 0;
  flex: 0 0 auto;
  accent-color: var(--signal);
}

.button {
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 2px;
  padding: 10px 16px;
  cursor: pointer;
  font-family: var(--condensed);
  font-weight: 600;
  letter-spacing: 0.015em;
  transition: background 140ms ease, border-color 140ms ease, color 140ms ease;
}
.button--quiet { border-color: var(--line-dark); background: transparent; color: var(--ink-soft); }
.button--quiet:hover { border-color: var(--ink); background: white; color: var(--ink); }
.button--primary { background: var(--blue-deep); color: white; }
.button--primary:hover { background: var(--signal); }
.button--wide { width: 100%; margin-top: 14px; min-height: 52px; }

.results { margin-top: 20px; }
.result-group { padding: 24px 0 7px; }
.result-group + .result-group { border-top: 2px solid var(--ink); }
.result-group h3 { margin-bottom: 8px; color: var(--blue-deep); font-size: 1.18rem; }
.result-group--summary {
  margin: 14px -28px -24px;
  padding: 18px 28px;
  border-top: 1px solid var(--line-dark) !important;
  background: var(--blue-pale);
}
.result-row {
  min-height: 55px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 25px;
  align-items: center;
  border-bottom: 1px solid var(--line);
}
.result-row:last-child { border-bottom: 0; }
.result-row > div { display: grid; gap: 2px; }
.result-row strong { font-size: 0.9rem; font-weight: 600; }
.result-row small { color: var(--quiet); font-family: var(--mono); font-size: 0.68rem; }
.result-row output {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.84rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.empty-state { margin: 24px 0 0; color: var(--quiet); }

.monthly-summary {
  position: relative;
  padding: 23px 30px 30px;
  overflow: hidden;
}
.monthly-summary::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: repeating-linear-gradient(90deg, var(--blue-deep) 0 18px, transparent 18px 25px);
}
.grand-total {
  margin: 22px -30px -30px;
  padding: 25px 30px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 30px;
  background: var(--blue-deep);
  color: white;
}
.grand-total span { font-family: var(--condensed); font-size: 1rem; }
.grand-total strong { font-family: var(--mono); font-size: clamp(1.5rem, 4vw, 2.45rem); font-weight: 500; }

.documentation-card {
  margin-top: 92px;
  padding: 38px 40px;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 60px;
  align-items: center;
  background: var(--ink);
  color: white;
}
.documentation-card .sheet-code { color: #9ec2d0; }
.documentation-card p { max-width: 670px; color: #b9c8d2; }
.doc-links { border-top: 1px solid rgba(255,255,255,0.28); }
.doc-links a {
  min-height: 51px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.28);
  color: white;
  text-decoration: none;
  font-family: var(--condensed);
  font-weight: 600;
}
.doc-links a:hover { color: #b9dce7; }
.doc-links b { font-family: var(--mono); font-weight: 400; }

footer {
  padding: 34px 20px 48px;
  border-top: 1px solid var(--line-dark);
  color: var(--quiet);
  text-align: center;
  font-size: 0.82rem;
}
footer p { margin: 5px 0; }
footer span { margin: 0 8px; }

@media (max-width: 980px) {
  .intro { grid-template-columns: 1fr; gap: 40px; }
  .period-register { max-width: 760px; }
  .rate-sheet { grid-template-columns: 1fr 1fr; }
  .rate-sheet > :first-child { grid-column: 1 / -1; border-bottom: 1px solid var(--line); }
  .rate-sheet > :nth-child(2) { border-left: 0; }
  .form-grid { grid-template-columns: 1fr; }
  .fields-grid--compact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .documentation-card { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 720px) {
  .topbar, .intro, .page-shell { width: min(100% - 28px, 1220px); }
  .nav-links { display: none; }
  .intro { padding: 48px 0 40px; }
  .intro h1 { font-size: clamp(3rem, 16vw, 5rem); }
  .register-cell { grid-template-columns: 72px 1fr; gap: 8px 12px; }
  .register-cell small { grid-column: 2; }
  .notice { grid-template-columns: 1fr; gap: 10px; padding: 18px 0 22px; }
  .notice-actions { margin-top: 5px; }
  .rate-sheet { grid-template-columns: 1fr; }
  .rate-sheet > * { padding: 23px 20px; }
  .rate-sheet > * + * { border-left: 0; border-top: 1px solid var(--line); }
  .sheet-heading { grid-template-columns: 1fr; gap: 7px; }
  .period { padding-top: 72px; }
  .period-heading, .period-heading--summary { grid-template-columns: 62px minmax(0, 1fr); gap: 15px; }
  .period-tag { display: none; }
  .period-stamp { width: 58px; min-height: 66px; }
  .period-stamp b { font-size: 1.2rem; }
  .sheet-panel { padding: 0 18px 20px; }
  .fields-grid, .fields-grid--compact { grid-template-columns: 1fr; }
  .carry-sheet { grid-template-columns: 1fr; padding: 22px 20px; gap: 20px; }
  .results-heading { align-items: flex-start; flex-direction: column; justify-content: center; padding: 13px 0; gap: 4px; }
  .result-group--summary { margin-left: -18px; margin-right: -18px; margin-bottom: -20px; padding-left: 18px; padding-right: 18px; }
  .monthly-summary { padding-left: 20px; padding-right: 20px; }
  .grand-total { margin-left: -20px; margin-right: -20px; margin-bottom: -30px; padding-left: 20px; padding-right: 20px; flex-direction: column; gap: 4px; }
  .documentation-card { padding: 30px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

@media print {
  .site-header, .notice, .button, .status, .documentation-card, footer, .form-grid, .carry-sheet, .rate-sheet { display: none !important; }
  body { background: white; }
  .page-shell { width: 100%; margin: 0; }
  .period { padding-top: 20px; break-inside: avoid; }
  .sheet-panel, .monthly-summary { box-shadow: none; }
}