:root {
  color-scheme: light;
  --bg: #f3efe6;
  --ink: #1c1914;
  --muted: #5c564c;
  --panel: #fffdf8;
  --line: #d8d0c2;
  --accent: #0f6a5a;
  --accent-ink: #f5fffb;
  --danger: #8b2e1f;
  --up: #8b2e1f;
  --down: #0f6a5a;
  --shadow: 0 12px 40px rgba(28, 25, 20, 0.08);
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(15, 106, 90, 0.12), transparent 40%),
    linear-gradient(180deg, #f7f2e8 0%, var(--bg) 100%);
  color: var(--ink);
}

a { color: inherit; text-decoration: none; }

.app-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 3rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.brand {
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 1.15rem;
}

.topbar nav {
  display: flex;
  gap: 1rem;
}

.topbar a.active {
  color: var(--accent);
  font-weight: 600;
}

.hero-panel, .page, .bill-editor, .result {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 18px;
  padding: 1.5rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

h1, h2, h3 { letter-spacing: -0.03em; margin-top: 0; }

.lede, .page-header p, .muted { color: var(--muted); }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.65rem 1rem;
  cursor: pointer;
  font: inherit;
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.btn.small { padding: 0.35rem 0.7rem; font-size: 0.9rem; }
.btn.danger { color: var(--danger); }
.btn:disabled { opacity: 0.6; cursor: wait; }

.bill-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
  color: var(--muted);
}

input, select {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

.lines { margin-top: 1rem; }
.lines-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.line-row {
  display: grid;
  grid-template-columns: 0.8fr 1.4fr 0.9fr 0.6fr 0.6fr 0.8fr auto;
  gap: 0.4rem;
  margin-bottom: 0.4rem;
}

.usage-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr 0.7fr 0.6fr auto;
  gap: 0.4rem;
  margin-bottom: 0.4rem;
}

.banner.ok {
  background: #e5f4ef;
  border: 1px solid #b7d9cd;
  color: var(--down);
  padding: 0.85rem 1rem;
  border-radius: 12px;
  margin-bottom: 1rem;
}

.page.narrow { max-width: 640px; }
.page-header.row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: flex-start;
}
.form-grid.single { grid-template-columns: 1fr; }
.linkish {
  background: none;
  border: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
  padding: 0;
}
.export-preview {
  margin-top: 1rem;
  padding: 1rem;
  background: #f7f3ea;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: auto;
  white-space: pre-wrap;
}

.result { margin-top: 1.5rem; }
.result-header, .result-columns {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.delta {
  text-align: right;
}

.delta.up strong { color: var(--up); }
.delta.down strong { color: var(--down); }
.delta-label {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
}

.narrative, .drivers, .anomalies {
  margin: 0;
  padding-left: 1.1rem;
}

.drivers li, .narrative li, .anomalies li { margin-bottom: 0.45rem; }

.anomaly-panel {
  margin-bottom: 1.25rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fbf7ef;
}

.anomaly.critical { color: var(--danger); }
.anomaly.warning { color: #7a4b12; }

.pill.critical {
  border-color: var(--danger);
  color: var(--danger);
}

.pill.warning {
  border-color: #b7791f;
  color: #7a4b12;
}

.pill {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
  font-size: 0.75rem;
  margin-right: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th, td {
  text-align: left;
  padding: 0.65rem 0.4rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

#blazor-error-ui {
  background: #f8e6e1;
  bottom: 0;
  box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.2);
  display: none;
  left: 0;
  padding: 0.6rem 1.25rem;
  position: fixed;
  width: 100%;
  z-index: 1000;
}

#blazor-error-ui .dismiss {
  cursor: pointer;
  position: absolute;
  right: 0.75rem;
  top: 0.5rem;
}

.loading-progress {
  position: relative;
  display: block;
  width: 8rem;
  height: 8rem;
  margin: 20vh auto 1rem;
}

.loading-progress circle {
  fill: none;
  stroke: var(--line);
  stroke-width: 0.6rem;
  transform-origin: 50% 50%;
  transform: rotate(-90deg);
}

.loading-progress circle:last-child {
  stroke: var(--accent);
  stroke-dasharray: calc(3.14159265359 * 8rem);
  stroke-dashoffset: calc(3.14159265359 * 8rem);
  animation: progress 1.2s ease-out infinite;
}

@keyframes progress {
  0% { stroke-dashoffset: calc(3.14159265359 * 8rem); }
  50% { stroke-dashoffset: calc(3.14159265359 * 2rem); }
  100% { stroke-dashoffset: calc(3.14159265359 * 8rem); }
}

.loading-progress-text {
  text-align: center;
  font-weight: 600;
  color: var(--muted);
}

@media (max-width: 800px) {
  .form-grid, .line-row, .usage-row {
    grid-template-columns: 1fr;
  }
}