/* VAT Calculator. Shared tokens (colors, radius, shadow, fonts) come from /shared/tokens.css */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
}

/* Components set display (grid, flex); keep the hidden attribute stronger */
[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.tool {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.vat {
  display: grid;
  gap: 1rem;
}

.vat-intro {
  display: grid;
  gap: 0.4rem;
}

.vat-title {
  margin: 0;
  font-family: var(--font-display);
  text-transform: var(--display-case);
  font-size: clamp(1.5rem, 6vw, 2rem);
  font-weight: 800;
  letter-spacing: var(--tracking-display);
}

.card {
  display: grid;
  gap: 1rem;
  min-width: 0;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card-title {
  margin: 0;
  font-family: var(--font-display);
  text-transform: var(--display-case);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: var(--tracking-display);
}

.card-hint {
  margin: 0;
  color: var(--text-muted);
}

.note {
  font-size: 0.85rem;
}

.note strong {
  color: var(--text);
}

.sub-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ── controls ─────────────────────────────────────────────────────────────── */

.field {
  display: grid;
  gap: 0.4rem;
  min-width: 0;
  align-content: start;
}

.field-label {
  padding: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.field-hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.field-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.field--rate {
  flex: 1 1 9rem;
}

.input {
  width: 100%;
  min-width: 0;
  padding: 0.6rem 0.75rem;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 4px);
}

.input[aria-invalid="true"] {
  border-color: var(--danger);
}

.input--amount {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-variant-numeric: tabular-nums;
}

.input:focus-visible,
.btn:focus-visible,
.icon-btn:focus-visible,
.source a:focus-visible {
  outline: 2px solid var(--accent-text);
  outline-offset: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.5rem;
  padding: 0.55rem 1rem;
  font: 600 0.9rem/1.2 var(--button-font);
  text-transform: var(--button-case);
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 4px);
  cursor: pointer;
}

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

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

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

.btn-icon {
  width: 1rem;
  height: 1rem;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
}

.button-row,
.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  flex: none;
  padding: 0;
  color: var(--text-muted);
  background: transparent;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
}

.icon-btn:hover {
  color: var(--danger);
  background: rgba(var(--accent-rgb), 0.12);
}

.icon-btn svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

.form-error {
  margin: 0;
  font-size: 0.9rem;
  color: var(--danger);
}

.action-status {
  flex-basis: 100%;
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.action-status:empty {
  display: none;
}

/* Radio groups drawn as a segmented control; the radios stay focusable (arrow keys) */
.choice {
  display: grid;
  gap: 0.4rem;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.2rem;
  padding: 0.2rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 2px);
}

.seg {
  position: relative;
  display: flex;
  min-width: 0;
}

.seg > span {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0 0.3rem;
  min-height: 2.25rem;
  padding: 0.35rem 0.6rem;
  font: 600 0.85rem/1.2 var(--font-sans);
  text-align: center;
  color: var(--text-muted);
  border-radius: calc(var(--radius) - 5px);
  cursor: pointer;
}

.seg > span:hover {
  color: var(--text);
}

.seg input:checked + span {
  color: var(--on-accent);
  background: var(--accent);
}

.seg input:focus-visible + span {
  outline: 2px solid var(--accent-text);
  outline-offset: 2px;
}

/* ── one amount ───────────────────────────────────────────────────────────── */

.results {
  display: grid;
  gap: 0.5rem;
  margin: 0;
}

.result-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 0.65rem 0.9rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 4px);
}

.result-row dt {
  color: var(--text-muted);
}

.result-row dd {
  margin: 0;
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  text-align: right;
  overflow-wrap: anywhere;
}

.result-row--main {
  background: rgba(var(--accent-rgb), 0.1);
  border-color: rgba(var(--accent-rgb), 0.35);
}

.result-row--main dt {
  color: var(--text);
  font-weight: 600;
}

.result-row--main dd {
  font-family: var(--font-display);
  text-transform: var(--display-case);
  font-size: clamp(1.15rem, 5vw, 1.5rem);
  font-weight: 700;
  letter-spacing: var(--tracking-display);
  color: var(--accent-text);
}

.copy-fallback {
  display: grid;
  gap: 0.4rem;
}

.copy-text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  resize: vertical;
}

/* ── invoice lines ────────────────────────────────────────────────────────── */

.lines {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.lines:empty {
  display: none;
}

.line {
  display: grid;
  gap: 0.6rem;
  min-width: 0;
  padding: 0.6rem 0.75rem 0.85rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 4px);
}

.line .input {
  background: var(--surface);
}

.line-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-right: -0.35rem;
}

.line-number {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* 8rem keeps the rate names readable: one column on phones, four on wider screens. The
   fields align at the bottom, so a label that wraps doesn't push its input down. */
.line-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  align-items: end;
  gap: 0.6rem;
}

.line-grid .input {
  font-variant-numeric: tabular-nums;
}

.line-amount {
  display: grid;
  gap: 0.4rem;
  align-content: start;
  min-width: 0;
}

.line-amount-value {
  padding: 0.6rem 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

/* ── totals ───────────────────────────────────────────────────────────────── */

.totals,
.groups {
  display: grid;
  gap: 0.6rem;
}

.group {
  display: grid;
  gap: 0.4rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 4px);
}

.group-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.group-rows {
  display: grid;
  gap: 0.25rem;
  margin: 0;
}

.group-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0 1rem;
}

.group-row dd {
  margin: 0;
  margin-left: auto;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
  overflow-wrap: anywhere;
}

.group--grand {
  background: rgba(var(--accent-rgb), 0.1);
  border-color: rgba(var(--accent-rgb), 0.35);
}

.group--grand .group-title {
  color: var(--text);
}

.group-row--total {
  align-items: baseline;
  margin-top: 0.2rem;
  font-weight: 600;
}

.group--grand .group-row--total dd {
  font-family: var(--font-display);
  text-transform: var(--display-case);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: var(--tracking-display);
  color: var(--accent-text);
}

/* ── rates ────────────────────────────────────────────────────────────────── */

.source {
  font-size: 0.85rem;
}

.source a {
  color: var(--accent-text);
  text-underline-offset: 0.15em;
}

@media (max-width: 400px) {
  .tool {
    padding-inline: 0.75rem;
  }

  .card {
    padding: 1rem;
  }
}