:root {
  --color-bg: #0f1117;
  --color-surface: #1a1d2e;
  --color-surface-raised: #21253a;
  --color-accent: #6c63ff;
  --color-accent-light: #a89dff;
  --color-text: #e2e8f0;
  --color-muted: #8892a4;
  --color-border: #2d3148;
  --color-danger: #ff6b6b;
  --color-danger-bg: #3a1f24;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --max-width: 1100px;
  --radius: 12px;
  --transition: 0.15s ease;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font);
  line-height: 1.5;
}

.page-header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 1rem;
}

.home-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.9rem;
}
.home-link:hover { color: var(--color-accent-light); }

.page-header h1 {
  margin: 0.75rem 0 0.25rem;
  font-size: 2rem;
}

.subtitle {
  color: var(--color-muted);
  margin: 0 0 0.75rem;
}

.currency-note {
  color: var(--color-muted);
  font-size: 0.82rem;
  line-height: 1.5;
  margin: 0;
  padding: 0.6rem 0.85rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  max-width: 640px;
}
.currency-note strong { color: var(--color-text); }

.layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.panel-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.panel-header h2 { margin: 0; font-size: 1.25rem; }
.panel-hint { color: var(--color-muted); font-size: 0.8rem; }

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 560px) {
  .field-grid { grid-template-columns: 1fr; }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.9rem;
}

.field[hidden] { display: none; }

.field span { color: var(--color-text); font-weight: 500; }

.field-standalone { margin-bottom: 1rem; max-width: 320px; }

.field small {
  color: var(--color-muted);
  font-size: 0.78rem;
  line-height: 1.35;
}

input[type='number'],
select {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  padding: 0.55rem 0.65rem;
  font-size: 1rem;
  font-family: inherit;
  width: 100%;
}

input[type='number']:focus,
select:focus {
  outline: none;
  border-color: var(--color-accent-light);
}

input.invalid {
  border-color: var(--color-danger);
}

.tiers-block { margin-top: 1.5rem; }

.tiers-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.tiers-header h3 { margin: 0; font-size: 1rem; }

.tiers-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.tier-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 0.6rem;
  align-items: end;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.6rem;
}

.tier-row label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.78rem;
  color: var(--color-muted);
}

.tier-remove {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  border-radius: 8px;
  height: 2.4rem;
  width: 2.4rem;
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition);
}
.tier-remove:hover {
  color: var(--color-danger);
  border-color: var(--color-danger);
}
.tier-remove:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.tcv-block { margin-bottom: 1.25rem; }

.tcv-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.tcv-header h3 { margin: 0; font-size: 1rem; }

.tcv-lines-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.tcv-line-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
  align-items: end;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.6rem;
}

.tcv-line-row label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.78rem;
  color: var(--color-muted);
}

.tcv-total {
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: var(--color-text);
}
.tcv-total .mono { color: var(--color-accent-light); }

.btn {
  border-radius: 8px;
  padding: 0.6rem 1.1rem;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover { background: var(--color-accent-light); }

.btn-secondary {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-secondary:hover { border-color: var(--color-accent-light); color: var(--color-accent-light); }

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--color-muted);
}
.btn-ghost:hover { color: var(--color-text); }

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

.save-status {
  color: var(--color-accent-light);
  font-size: 0.85rem;
}

.errors {
  margin-top: 1rem;
  color: var(--color-danger);
  background: var(--color-danger-bg);
  border: 1px solid var(--color-danger);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  display: none;
}
.errors:not(:empty) { display: block; }
.errors ul { margin: 0; padding-left: 1.1rem; }

.results { margin-top: 1.75rem; }

.result-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.result-card {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.result-card-accent {
  border-color: var(--color-accent);
  background: linear-gradient(160deg, var(--color-surface-raised), #26224a);
}

.result-label {
  color: var(--color-muted);
  font-size: 0.8rem;
}

.year-breakdown {
  margin-top: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.75rem 1rem 1rem;
}
.year-breakdown h3 { margin: 0 0 0.35rem; font-size: 1rem; }
.year-breakdown .panel-hint { display: block; margin-bottom: 0.75rem; }

.year-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.year-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.5rem 0.65rem;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.88rem;
}

.year-row-total {
  border-color: var(--color-accent);
  font-weight: 600;
}

.year-label { color: var(--color-text); }
.year-amounts { color: var(--color-accent-light); font-variant-numeric: tabular-nums; }

.result-value {
  font-size: 1.6rem;
  font-weight: 600;
}

.breakdown {
  margin-top: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

.breakdown summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--color-accent-light);
}

.breakdown-list {
  margin: 0.75rem 0 0.25rem;
  padding-left: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.88rem;
  color: var(--color-text);
}

.breakdown-list li span.mono {
  color: var(--color-accent-light);
  font-variant-numeric: tabular-nums;
}

.page-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  color: var(--color-muted);
  font-size: 0.8rem;
}

.page-footer code {
  background: var(--color-surface);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}