/*
  Shared calculator / tool workspace chrome.
  Depends on design tokens from /site.css — load site.css first.
  Used by LetterROI, SponsorQuote, SubTarget.
*/

body.tool-page {
  /* clip (not hidden): Firefox treats overflow-x:hidden as a scroll
     container and breaks position:sticky on .results */
  overflow-x: clip;
}

.brand-tool {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 0;
}

.brand-tool .brand-logo {
  width: min(38px, 11vw);
}

.brand-tool-name {
  margin: 0;
  padding-left: var(--space-sm);
  border-left: 1px solid var(--line-strong);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.5vw, 1.35rem);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.1;
  text-decoration: none;
}

.brand-tool-name:hover {
  color: var(--pine);
}

.tool-page .hero {
  max-width: 36rem;
  margin-bottom: var(--space-xl);
}

.tool-page .hero h1 {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 5.5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.12;
  color: var(--ink);
}

.tool-page .lede {
  margin: 0;
  max-width: 42ch;
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.7;
}

.workspace {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  animation: rise 0.8s var(--ease) 0.08s both;
}

@media (min-width: 900px) {
  .workspace {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--space-2xl);
    align-items: start;
  }
}

.inputs,
.results {
  min-width: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  padding: 0;
}

.results {
  position: relative;
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius);
}

@media (prefers-reduced-motion: no-preference) {
  .results[data-result-state="updating"]::before,
  .results[data-result-state="ready"]::before {
    content: "";
    position: absolute;
    top: -1px;
    right: -1px;
    left: -1px;
    height: 2px;
    background: var(--accent);
    pointer-events: none;
    transform-origin: left center;
  }

  .results[data-result-state="updating"]::before {
    opacity: 0;
    transform: scaleX(0);
  }

  .results[data-result-state="ready"]::before {
    animation: result-rule 0.65s var(--ease) both;
  }

  .results[data-result-state="updating"] .total,
  .results[data-result-state="updating"] .results-note,
  .results[data-result-state="updating"] .explanation-panel,
  .results[data-result-state="updating"] .chart-wrap,
  .results[data-result-state="updating"] [id$="-table-wrap"],
  .results[data-result-state="updating"] .target-prob,
  .results[data-result-state="updating"] .next-steps {
    opacity: 0.74;
    transform: translateY(6px);
  }

  .results[data-result-state="ready"] .total,
  .results[data-result-state="ready"] .results-note,
  .results[data-result-state="ready"] .explanation-panel,
  .results[data-result-state="ready"] .chart-wrap,
  .results[data-result-state="ready"] [id$="-table-wrap"],
  .results[data-result-state="ready"] .target-prob,
  .results[data-result-state="ready"] .next-steps {
    opacity: 1;
    transform: none;
    transition:
      opacity 0.34s var(--ease),
      transform 0.34s var(--ease);
  }

  .results[data-result-state="ready"] .explanation-panel {
    transition-delay: 0.05s;
  }

  .results[data-result-state="ready"] .chart-wrap,
  .results[data-result-state="ready"] [id$="-table-wrap"] {
    transition-delay: 0.1s;
  }

  .results[data-result-state="ready"] .target-prob,
  .results[data-result-state="ready"] .next-steps {
    transition-delay: 0.15s;
  }
}

@keyframes result-rule {
  0% {
    opacity: 0;
    transform: scaleX(0);
  }
  65% {
    opacity: 1;
    transform: scaleX(1);
  }
  100% {
    opacity: 0;
    transform: scaleX(1);
  }
}

.results .data-table-wrap {
  min-width: 0;
  max-width: 100%;
}

@media (min-width: 900px) {
  .results {
    position: sticky;
    top: 1.25rem;
  }
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}

.field-wide {
  grid-column: 1 / -1;
}

.field[hidden] {
  display: none !important;
}

.field-hint {
  margin: 0;
  font-size: 0.78rem;
  color: var(--ink-soft);
  line-height: 1.4;
}

.optional-kicker {
  grid-column: 1 / -1;
  margin: var(--space-2xs) 0 0;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.inputs label {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.field-error {
  margin: 0;
  min-height: 1.1em;
  font-size: 0.8rem;
  line-height: 1.35;
  color: var(--danger-text);
}

.field-error:empty {
  display: none;
}

.inputs input[aria-invalid="true"],
.inputs select[aria-invalid="true"] {
  border-color: rgba(138, 59, 40, 0.55);
}

.inputs input,
.inputs select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-weight: 500;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.inputs input:hover,
.inputs select:hover {
  border-color: var(--line-strong);
}

.inputs input:focus-visible,
.inputs select:focus-visible {
  outline: none;
  border-color: rgba(74, 93, 78, 0.45);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(74, 93, 78, 0.1);
}

.inputs input:disabled,
.inputs select:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.channel-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--line);
}

.channel-name-field {
  grid-column: 1 / -1;
}

.channel-row input {
  padding: 0.65rem 0.85rem;
}

.form-actions {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xs);
  margin-top: var(--space-2xs);
}

@media (min-width: 520px) {
  .form-actions {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }
}

.primary,
.secondary-action {
  grid-column: 1 / -1;
  border-radius: var(--radius);
  padding: 0.95rem 1.25rem;
  font: inherit;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

.form-actions .primary,
.form-actions .secondary-action {
  grid-column: auto;
  min-width: 0;
}

.primary {
  border: 0;
  background: var(--pine);
  color: var(--surface);
}

.secondary-action {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
}

.primary:hover {
  background: #24382e;
}

.secondary-action:hover {
  background: var(--surface-2);
  border-color: var(--line-strong);
}

.primary:focus-visible,
.secondary-action:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.sample-note {
  grid-column: 1 / -1;
}

/* ─── Textarea (forecast CSV input) ─── */
.inputs textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 0.9rem;
  resize: vertical;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.inputs textarea:hover {
  border-color: var(--line-strong);
}

.inputs textarea:focus-visible {
  outline: none;
  border-color: rgba(74, 93, 78, 0.45);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(74, 93, 78, 0.1);
}

/* ─── Manual data-entry rows (forecast) ─── */
.manual-label {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.manual-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.manual-row input {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.7rem;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 0.9rem;
  transition: border-color 0.2s var(--ease);
}

.manual-row input:hover {
  border-color: var(--line-strong);
}

.manual-row input:focus-visible {
  outline: none;
  border-color: rgba(74, 93, 78, 0.45);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(74, 93, 78, 0.1);
}

.add-row {
  margin-top: 0.5rem;
}

/* ─── Chart wrapper + canvas ─── */
.chart-wrap {
  margin-bottom: 1.5rem;
}

.chart-wrap canvas {
  display: block;
  width: 100%;
  max-width: 500px;
  height: auto;
}

/* ─── Target-probability callout (forecast) ─── */
.target-prob {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--surface-2);
  border-radius: var(--radius);
  border-left: 3px solid var(--accent);
}

.target-prob-text {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.6;
}

@media (hover: hover) {
  .primary:hover {
    transform: translateY(-1px);
  }
}

.primary:active {
  transform: translateY(0);
}

.primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.results-kicker {
  margin: 0 0 var(--space-2xs);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.total {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.5vw, 2.9rem);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.12;
  color: var(--ink);
}

.results-note {
  margin: var(--space-xs) 0 var(--space-lg);
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.6;
}

.explanation-panel {
  margin: 0 0 var(--space-lg);
  padding: var(--space-sm) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.explanation-panel h2 {
  margin: 0 0 var(--space-xs);
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  line-height: 1.2;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.explanation-panel dl {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-sm);
  margin: 0;
}

.explanation-panel div {
  min-width: 0;
}

.explanation-panel dt {
  margin: 0 0 0.2rem;
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.25;
  text-transform: uppercase;
}

.explanation-panel dd {
  margin: 0;
  color: var(--ink);
  font-size: 0.88rem;
  line-height: 1.45;
}

.streams {
  list-style: none;
  margin: 0 0 var(--space-lg);
  padding: 0;
  display: grid;
  gap: 0;
}

.streams li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-top: 1px solid var(--line);
  font-size: 0.98rem;
  color: var(--ink-soft);
}

.streams li:last-child {
  border-bottom: 1px solid var(--line);
}

.streams li[hidden] {
  display: none !important;
}

.streams strong {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--ink);
}

.cta {
  border-radius: var(--radius);
  padding: var(--space-md) 1.3rem 1.35rem;
  background: var(--pine);
  color: var(--surface);
}

.cta h2 {
  margin: 0 0 var(--space-xs);
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0;
  line-height: 1.25;
}

.cta p {
  margin: 0 0 var(--space-md);
  color: var(--paper);
  font-size: 0.94rem;
  line-height: 1.6;
}

.cta-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius);
  background: var(--accent);
  color: #2a1810;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s var(--ease), filter 0.2s var(--ease);
}

.cta-link:hover {
  filter: brightness(1.04);
}

.cta-link:focus-visible {
  outline: 2px solid var(--surface);
  outline-offset: 3px;
}

@media (hover: hover) {
  .cta-link:hover {
    transform: translateY(-1px);
  }
}

.cta-fine {
  margin: var(--space-sm) 0 0 !important;
  font-size: 0.78rem !important;
  color: var(--paper) !important;
}

.content-block {
  margin-top: var(--space-2xl);
  max-width: 40rem;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--line);
  animation: rise 0.8s var(--ease) 0.15s both;
}

.content-block h2 {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.65rem);
  letter-spacing: 0;
  line-height: 1.25;
}

.content-block p {
  margin: 0 0 var(--space-md);
  color: var(--ink-soft);
  line-height: 1.7;
}

.content-block p:last-child {
  margin-bottom: 0;
}

.plain-list {
  margin: 0 0 var(--space-md);
  padding-left: 1.15rem;
  color: var(--ink-soft);
}

.plain-list li {
  margin-bottom: var(--space-xs);
  line-height: 1.6;
}

.plain-list strong {
  color: var(--ink);
  font-weight: 600;
}

.faq-item {
  border-top: 1px solid var(--line);
  padding: var(--space-md) 0;
}

.faq-item:last-child {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  color: var(--ink);
  line-height: 1.45;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  color: var(--accent-text);
  font-weight: 500;
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-item p {
  margin: 0.7rem 0 0;
  line-height: 1.7;
}

.faq-item a {
  color: var(--accent-text);
  font-weight: 600;
}

.related-tools {
  margin-top: var(--space-md);
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.related-tools a {
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.related-tools a:hover {
  text-decoration: underline;
  text-underline-offset: 0.14em;
  color: var(--accent-text);
}

.total.is-pop {
  animation: pop 0.45s var(--ease);
}

@keyframes pop {
  from {
    opacity: 0.45;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  .inputs {
    grid-template-columns: 1fr;
  }

  .field-wide,
  .optional-kicker {
    grid-column: auto;
  }

  .channel-row {
    grid-template-columns: 1fr;
  }

  .results {
    padding: var(--space-md);
  }

  .explanation-panel dl {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }
}

@media (prefers-reduced-motion: reduce) {
  .workspace,
  .content-block,
  .total.is-pop {
    animation: none !important;
  }
}

/* ─── Premium analytics workspace refinements ─── */
.brand-tool-name,
.tool-page .hero h1,
.content-block h2 {
  font-weight: 600;
  letter-spacing: -0.045em;
}

.brand-tool-name {
  font-size: clamp(1.05rem, 2.3vw, 1.25rem);
}

.tool-page .hero h1 {
  font-size: clamp(2.4rem, 5.2vw, 3.3rem);
  line-height: 1;
}

.tool-page .lede {
  letter-spacing: -0.018em;
}

@media (min-width: 900px) {
  .workspace {
    grid-template-columns: minmax(0, 0.94fr) minmax(30rem, 1.06fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }
}

.inputs {
  align-content: start;
}

.inputs label,
.optional-kicker,
.manual-label,
.results-kicker,
.explanation-panel h2,
.explanation-panel dt,
.next-steps-label {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.inputs label,
.optional-kicker,
.manual-label {
  color: var(--accent-text);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.field-hint,
.sample-note {
  font-size: 0.7rem;
}

.inputs input,
.inputs select,
.inputs textarea,
.manual-row input {
  border-color: var(--line);
  border-radius: 2px;
  background: rgba(20, 23, 21, 0.86);
  color: var(--ink);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.inputs input:focus-visible,
.inputs select:focus-visible,
.inputs textarea:focus-visible,
.manual-row input:focus-visible {
  border-color: var(--accent);
  background: var(--surface-raised);
  color: var(--ink);
  box-shadow: 0 0 0 3px rgba(66, 162, 142, 0.12);
}

.channel-row {
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-strong);
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    rgba(20, 23, 21, 0.55);
  background-size: 24px 24px;
}

.channel-row:focus-within {
  border-left-color: var(--accent);
}

.primary,
.secondary-action,
.ghost-btn {
  min-height: 2.8rem;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: -0.01em;
}

.primary {
  background: var(--accent);
  color: #07110e;
}

.primary:hover {
  background: var(--accent-text);
}

.secondary-action {
  border-color: var(--line-strong);
  background: rgba(20, 23, 21, 0.76);
}

.results {
  overflow: hidden;
  padding: var(--space-lg);
  border-color: var(--line-strong);
  border-radius: 3px;
  background:
    linear-gradient(90deg, var(--accent) 0 78%, var(--signal) 78%) top /
      100% 2px no-repeat,
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    var(--surface);
  background-size:
    100% 2px,
    28px 28px,
    28px 28px,
    auto;
  box-shadow:
    0 1px 0 rgba(245, 243, 239, 0.05) inset,
    0 26px 70px rgba(0, 0, 0, 0.32);
}

.results-kicker {
  color: var(--accent-text);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.total {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 2.7rem);
  font-weight: 600;
  letter-spacing: -0.065em;
  line-height: 1.06;
  font-variant-numeric: tabular-nums;
}

.results-note {
  font-size: 0.84rem;
}

.explanation-panel {
  padding: 0;
  border-color: var(--line-strong);
}

.explanation-panel h2 {
  margin: 0;
  padding: 0.65rem 0;
  color: var(--accent-text);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
}

.explanation-panel dl {
  gap: 0;
  border-top: 1px solid var(--line);
  background: rgba(12, 12, 12, 0.46);
}

.explanation-panel div {
  padding: 0.75rem;
}

.explanation-panel div + div {
  border-left: 1px solid var(--line);
}

.explanation-panel dt {
  color: var(--ink-soft);
  font-size: 0.58rem;
  letter-spacing: 0.05em;
}

.explanation-panel div:nth-child(3) dt {
  color: var(--signal-text);
}

.explanation-panel dd {
  margin-top: 0.35rem;
  font-size: 0.76rem;
}

.chart-wrap {
  padding: 0.6rem;
  border: 1px solid var(--line);
  background: rgba(12, 12, 12, 0.72);
}

.data-table {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
}

.data-table thead th {
  color: var(--accent-text);
  font-size: 0.56rem;
}

.data-table td {
  color: var(--ink);
}

.target-prob {
  border: 1px solid var(--signal-line);
  border-left: 2px solid var(--signal);
  border-radius: 2px;
  background: var(--signal-soft);
}

.target-prob-text {
  font-size: 0.8rem;
}

.next-steps {
  border-top-color: var(--line-strong);
}

.next-steps-label {
  color: var(--signal-text);
  font-size: 0.58rem;
}

.content-block {
  max-width: 44rem;
}

.faq-item summary::after {
  font-family: var(--font-mono);
}

@media (max-width: 640px) {
  .channel-row {
    padding: 0.75rem;
  }

  .results {
    padding: var(--space-md);
  }

  .explanation-panel div {
    padding: 0.55rem 0;
  }

  .explanation-panel div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}