:root {
  --bg: #f5f0e5;
  --paper: rgba(255, 251, 243, 0.88);
  --paper-strong: #fffaf0;
  --ink: #14211d;
  --muted: #5d665f;
  --line: rgba(20, 33, 29, 0.13);
  --accent: #0d7a53;
  --accent-soft: rgba(13, 122, 83, 0.12);
  --accent-warm: #d5842b;
  --danger: #9f2f27;
  --shadow: 0 24px 60px rgba(60, 46, 24, 0.12);
  --radius: 22px;
  --mono: "IBM Plex Mono", monospace;
  --sans: "Space Grotesk", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  color: var(--ink);
  background:
    linear-gradient(rgba(255, 255, 255, 0.34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.34) 1px, transparent 1px),
    radial-gradient(circle at top left, rgba(213, 132, 43, 0.14), transparent 36%),
    radial-gradient(circle at bottom right, rgba(13, 122, 83, 0.12), transparent 34%),
    var(--bg);
  background-size: 24px 24px, 24px 24px, auto, auto, auto;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 250, 240, 0.26), rgba(245, 240, 229, 0.62));
}

a {
  color: var(--accent);
}

code {
  font-family: var(--mono);
  font-size: 0.92em;
}

.page-shell {
  position: relative;
  z-index: 1;
  max-width: 1340px;
  margin: 0 auto;
  padding: 32px 20px 72px;
}

.hero {
  display: grid;
  gap: 18px;
  padding: 28px 0 40px;
}

.back-link {
  width: fit-content;
  font-family: var(--mono);
  text-decoration: none;
  color: var(--muted);
}

.eyebrow,
.panel-label {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero-copy h1,
.panel h2 {
  margin: 0;
  letter-spacing: -0.04em;
}

.hero-copy h1 {
  max-width: 14ch;
  font-size: clamp(2.7rem, 6vw, 5rem);
  line-height: 0.95;
}

.lead {
  max-width: 64ch;
  margin: 0;
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
  line-height: 1.7;
  color: var(--muted);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.meta-pill {
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.56);
  font-family: var(--mono);
  font-size: 0.83rem;
}

.layout,
.summary-grid,
.foot-grid {
  display: grid;
  gap: 18px;
}

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

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.controls-panel,
.status-panel,
.rates-panel,
.sheet-panel,
.notes-panel,
.source-panel {
  padding: 24px;
}

.controls-panel {
  display: grid;
  gap: 18px;
}

.controls-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: end;
  justify-content: space-between;
}

.field {
  display: grid;
  gap: 8px;
  min-width: min(100%, 340px);
}

.field span,
.helper {
  color: var(--muted);
}

.field span {
  font-size: 0.92rem;
}

select,
button,
input {
  font: inherit;
}

select,
.sheet-input {
  min-height: 48px;
  border: 1px solid rgba(20, 33, 29, 0.18);
  border-radius: 14px;
  background: var(--paper-strong);
  color: var(--ink);
}

select {
  padding: 0 14px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

button {
  min-height: 48px;
  padding: 0 16px;
  border: 0;
  border-radius: 14px;
  background: var(--accent);
  color: #f7fff9;
  font-weight: 700;
  cursor: pointer;
  transition: transform 160ms ease, opacity 160ms ease, background 160ms ease;
}

button:hover,
button:focus-visible {
  transform: translateY(-1px);
}

button.secondary {
  background: rgba(20, 33, 29, 0.08);
  color: var(--ink);
}

button:focus-visible,
select:focus-visible,
.sheet-input:focus-visible {
  outline: 3px solid rgba(13, 122, 83, 0.18);
  outline-offset: 2px;
}

.status-panel {
  display: grid;
  gap: 8px;
}

.status-copy {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.status-details {
  display: grid;
  gap: 8px;
  margin-top: 8px;
}

.status-details span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(20, 33, 29, 0.06);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.rates-panel {
  display: grid;
  gap: 18px;
}

.rates-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.rates-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.rate-card {
  min-height: 120px;
  padding: 16px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 248, 235, 0.9));
  border: 1px solid rgba(20, 33, 29, 0.1);
  display: grid;
  gap: 10px;
}

.rate-card strong {
  font-size: 1.35rem;
  letter-spacing: -0.04em;
}

.rate-card p,
.rate-card small {
  margin: 0;
}

.rate-card small {
  color: var(--muted);
  font-family: var(--mono);
}

.rate-card.skeleton {
  background: linear-gradient(90deg, rgba(20, 33, 29, 0.08), rgba(20, 33, 29, 0.03), rgba(20, 33, 29, 0.08));
  background-size: 200% 100%;
  animation: shimmer 1.4s linear infinite;
}

@keyframes shimmer {
  from {
    background-position: 200% 0;
  }

  to {
    background-position: -200% 0;
  }
}

.sheet-panel {
  display: grid;
  gap: 18px;
}

.sheet-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-end;
}

.sheet-wrap {
  overflow: auto;
  border-radius: 18px;
  border: 1px solid rgba(20, 33, 29, 0.08);
  background: rgba(255, 255, 255, 0.52);
}

.sheet-table {
  width: 100%;
  min-width: 1180px;
  border-collapse: collapse;
}

.sheet-table th,
.sheet-table td {
  padding: 12px 10px;
  border-bottom: 1px solid rgba(20, 33, 29, 0.08);
  vertical-align: top;
}

.sheet-table th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: rgba(255, 250, 240, 0.96);
  text-align: left;
  font-size: 0.83rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.sheet-table td:first-child,
.sheet-table th:first-child {
  width: 52px;
  text-align: center;
  font-family: var(--mono);
}

.sheet-input {
  width: 100%;
  padding: 0 12px;
}

.sheet-input::placeholder {
  color: rgba(93, 102, 95, 0.62);
}

.mono {
  font-family: var(--mono);
  font-size: 0.88rem;
}

.result-cell strong,
.result-cell span,
.result-cell small {
  display: block;
}

.result-cell strong {
  font-size: 0.96rem;
}

.result-cell small {
  margin-top: 4px;
  color: var(--muted);
}

.empty-result {
  color: rgba(93, 102, 95, 0.58);
}

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

.ok-text {
  color: var(--accent);
}

.notes-list,
.source-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.source-list a {
  font-family: var(--mono);
  text-decoration-thickness: 1px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 1040px) {
  .summary-grid,
  .foot-grid {
    grid-template-columns: 1fr;
  }

  .sheet-header,
  .rates-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .rates-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .page-shell {
    padding: 20px 14px 56px;
  }

  .controls-panel,
  .status-panel,
  .rates-panel,
  .sheet-panel,
  .notes-panel,
  .source-panel {
    padding: 18px;
  }

  .controls-grid {
    flex-direction: column;
    align-items: stretch;
  }

  .button-row {
    width: 100%;
  }

  .button-row button {
    flex: 1 1 0;
  }
}