.calculator-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
  color: #0f172a;
}

.calculator-hero {
  background:
    radial-gradient(circle at top left, rgba(40, 104, 167, 0.16), transparent 34%),
    linear-gradient(135deg, #0f172a, #1f527d 60%, #2868a7);
  color: #ffffff;
  padding: 2.5rem;
  border-radius: 28px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.18);
}

.calculator-hero__eyebrow,
.calculator-category__eyebrow {
  margin: 0 0 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 700;
  opacity: 0.78;
}

.calculator-hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.04;
}

.calculator-hero__lead {
  max-width: 820px;
  margin: 1rem 0 0;
  font-size: 1.04rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.88);
}

.calculator-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.calculator-hero__meta span {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.calculator-anchor-nav {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin: 1.1rem 0 0;
}

.calculator-anchor-nav a {
  display: inline-flex;
  align-items: center;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid #d7e0ea;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.06);
  color: #0f172a;
  text-decoration: none;
  font-weight: 600;
}

.calculator-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 1rem;
  margin-top: 1.4rem;
}

.calculator-toolbar--single {
  grid-template-columns: minmax(0, 1fr);
}

.calculator-toolbar__field {
  display: grid;
  gap: 0.45rem;
}

.calculator-toolbar__field label {
  font-size: 0.92rem;
  font-weight: 700;
  color: #334155;
}

.calculator-toolbar__field input,
.calculator-toolbar__field select,
.calculator-form__label input {
  width: 100%;
}

.calculator-toolbar__field input,
.calculator-toolbar__field select,
.calculator-form__label input,
.calculator-form__label textarea,
.calculator-form__label select {
  padding: 0.95rem 1rem;
  border: 1px solid #cbd5e1;
  border-radius: 16px;
  background: #ffffff;
  font: inherit;
  color: #0f172a;
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.04);
}

.calculator-toolbar__field input:focus,
.calculator-toolbar__field select:focus,
.calculator-form__label input:focus,
.calculator-form__label textarea:focus,
.calculator-form__label select:focus,
.calculator-btn:focus,
.calculator-filter:focus,
.calculator-anchor-nav a:focus {
  outline: 3px solid rgba(40, 104, 167, 0.18);
  outline-offset: 2px;
  border-color: #2868a7;
}

.calculator-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.calculator-filter {
  padding: 0.8rem 1rem;
  border-radius: 999px;
  border: 1px solid #cbd5e1;
  background: #ffffff;
  color: #0f172a;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.05);
}

.calculator-filter.is-active {
  background: rgba(40, 104, 167, 0.08);
  border-color: #2868a7;
  color: #174267;
}

.calculator-empty-state,
.calculator-cta,
.calculator-faq {
  margin-top: 1.5rem;
  background: #ffffff;
  border: 1px solid #d7e0ea;
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.calculator-empty-state h2,
.calculator-section-heading h2,
.calculator-cta h2 {
  margin-top: 0;
}

.calculator-category {
  margin-top: 1.8rem;
}

.calculator-category__header {
  display: grid;
  gap: 0.65rem;
  max-width: 880px;
  margin-bottom: 1rem;
}

.calculator-category__header h2,
.calculator-card__summary h3 {
  margin: 0;
}

.calculator-category__header p {
  margin: 0;
}

.calculator-category__header p:last-child {
  color: #475569;
  line-height: 1.65;
}

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

.calculator-card {
  min-width: 0;
}

.calculator-card__details {
  background: #ffffff;
  border: 1px solid #d7e0ea;
  border-radius: 22px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  overflow: hidden;
}

.calculator-card__summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.3rem 1.4rem;
  cursor: pointer;
}

.calculator-card__summary::-webkit-details-marker {
  display: none;
}

.calculator-card__eyebrow {
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: #2868a7;
  font-weight: 700;
}

.calculator-card__summary p {
  margin: 0.55rem 0 0;
  color: #475569;
  line-height: 1.55;
}

.calculator-card__toggle {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 68px;
  padding: 0.65rem 0.8rem;
  border-radius: 999px;
  background: #f8fafc;
  border: 1px solid #d7e0ea;
  font-size: 0.85rem;
  font-weight: 700;
  color: #334155;
}

.calculator-card__details[open] .calculator-card__toggle {
  background: rgba(40, 104, 167, 0.08);
  border-color: #2868a7;
  color: #174267;
}

.calculator-card__details[open] .calculator-card__toggle::after {
  content: "Close";
}

.calculator-card__details[open] .calculator-card__toggle {
  color: transparent;
  position: relative;
}

.calculator-card__details[open] .calculator-card__toggle::after {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #174267;
}

.calculator-card__body {
  display: grid;
  gap: 1.2rem;
  padding: 0 1.4rem 1.4rem;
}

.calculator-card__copy p {
  margin: 0;
  color: #475569;
  line-height: 1.65;
}

.calculator-card__copy p + p {
  margin-top: 0.75rem;
}

.calculator-card__formula {
  color: #0f172a;
}

.calculator-form {
  display: grid;
  gap: 1rem;
}

.calculator-form__fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.calculator-form__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.calculator-form__label {
  display: grid;
  gap: 0.45rem;
  min-width: 0;
}

.calculator-form__label span {
  font-weight: 700;
  color: #0f172a;
}

.calculator-form__label small {
  color: #64748b;
  line-height: 1.45;
}

.calculator-form__label textarea {
  min-height: 130px;
  resize: vertical;
}

.calculator-form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.calculator-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.calculator-btn:hover,
.calculator-anchor-nav a:hover,
.calculator-filter:hover {
  transform: translateY(-1px);
}

.calculator-btn[disabled] {
  cursor: not-allowed;
  opacity: 0.6;
  transform: none;
}

.calculator-btn--primary {
  background: #2868a7;
  color: #ffffff;
  box-shadow: 0 12px 24px rgba(40, 104, 167, 0.18);
}

.calculator-btn--ghost {
  background: #ffffff;
  color: #174267;
  border-color: #cbd5e1;
}

.calculator-form__error {
  padding: 0.95rem 1rem;
  border-radius: 16px;
  border: 1px solid #fecaca;
  background: #fef2f2;
  color: #991b1b;
}

.calculator-form__error p {
  margin: 0;
}

.calculator-form__error p + p {
  margin-top: 0.35rem;
}

.calculator-result {
  background:
    radial-gradient(circle at top right, rgba(40, 104, 167, 0.1), transparent 32%),
    #f8fafc;
  border: 1px solid #d7e0ea;
  border-radius: 18px;
  padding: 1.2rem;
}

.calculator-result__header {
  display: flex;
  gap: 1rem;
  align-items: end;
  justify-content: space-between;
  flex-wrap: wrap;
}

.calculator-result__label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: #2868a7;
  font-weight: 700;
}

.calculator-result__primary {
  font-size: clamp(1.5rem, 3vw, 2.45rem);
  font-weight: 800;
  line-height: 1.05;
  color: #0f172a;
}

.calculator-result__explanation {
  margin: 0.85rem 0 0;
  color: #334155;
  line-height: 1.65;
}

.calculator-result__progress,
.calculator-result__preview {
  margin-top: 1rem;
}

.calculator-result__metrics {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.65rem 1rem;
  margin: 1rem 0 0;
}

.calculator-result__metrics dt {
  color: #475569;
}

.calculator-result__metrics dd {
  margin: 0;
  text-align: right;
  font-weight: 700;
  color: #0f172a;
}

.calculator-result__proposal {
  margin-top: 1rem;
  border-top: 1px solid #d7e0ea;
  padding-top: 1rem;
}

.calculator-result__channels {
  margin-top: 1rem;
}

.calculator-channel-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.calculator-channel {
  padding: 1rem;
  border-radius: 16px;
  border: 1px solid #d7e0ea;
  background: #ffffff;
}

.calculator-channel__header {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
}

.calculator-channel__header h4 {
  margin: 0;
  font-size: 1rem;
  color: #0f172a;
}

.calculator-channel__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 700;
  white-space: nowrap;
}

.calculator-channel__badge--good-length {
  background: #ecfdf5;
  color: #166534;
  border: 1px solid #86efac;
}

.calculator-channel__badge--good {
  background: #ecfdf5;
  color: #166534;
  border: 1px solid #86efac;
}

.calculator-channel__badge--too-short {
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #93c5fd;
}

.calculator-channel__badge--needs-improvement {
  background: #fffbeb;
  color: #a16207;
  border: 1px solid #fcd34d;
}

.calculator-channel__badge--too-long {
  background: #fff7ed;
  color: #c2410c;
  border: 1px solid #fdba74;
}

.calculator-channel__badge--poor {
  background: #fef2f2;
  color: #b91c1c;
  border: 1px solid #fca5a5;
}

.calculator-channel__meta,
.calculator-channel__detail {
  margin: 0.55rem 0 0;
  color: #475569;
  line-height: 1.55;
}

.calculator-channel__meta {
  font-size: 0.88rem;
}

.calculator-progress,
.calculator-preview {
  border: 1px solid #d7e0ea;
  border-radius: 16px;
  background: #ffffff;
  padding: 1rem;
}

.calculator-progress__header,
.calculator-preview__heading {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.calculator-progress__header h4,
.calculator-preview__heading h4 {
  margin: 0;
  font-size: 1rem;
  color: #0f172a;
}

.calculator-preview__heading span {
  color: #64748b;
  font-size: 0.84rem;
}

.calculator-progress__meta {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.8rem;
}

.calculator-progress__meta strong {
  color: #0f172a;
}

.calculator-progress__meta span {
  color: #475569;
  line-height: 1.55;
}

.calculator-progress__track {
  position: relative;
  margin-top: 0.9rem;
  height: 14px;
  border-radius: 999px;
  background: #e2e8f0;
  overflow: hidden;
}

.calculator-progress__target {
  position: absolute;
  top: 2px;
  bottom: 2px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.22);
}

.calculator-progress__fill {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 0;
  border-radius: 999px;
  background: linear-gradient(90deg, #60a5fa, #2868a7);
}

.calculator-progress__limit {
  position: absolute;
  top: -2px;
  bottom: -2px;
  width: 2px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.28);
}

.calculator-progress[data-status="too-short"] .calculator-progress__fill {
  background: linear-gradient(90deg, #93c5fd, #60a5fa);
}

.calculator-progress[data-status="good"] .calculator-progress__fill {
  background: linear-gradient(90deg, #4ade80, #16a34a);
}

.calculator-progress[data-status="needs-improvement"] .calculator-progress__fill {
  background: linear-gradient(90deg, #facc15, #f59e0b);
}

.calculator-progress[data-status="too-long"] .calculator-progress__fill {
  background: linear-gradient(90deg, #fb923c, #dc2626);
}

.calculator-progress[data-status="poor"] .calculator-progress__fill {
  background: linear-gradient(90deg, #f97316, #dc2626);
}

.calculator-preview__card {
  margin-top: 0.8rem;
  padding: 1rem;
  border-radius: 14px;
  background: #f8fafc;
  border: 1px solid #d7e0ea;
}

.calculator-preview__title,
.calculator-preview__url,
.calculator-preview__description,
.calculator-preview__note {
  margin: 0;
}

.calculator-preview__title {
  color: #1a0dab;
  font-size: 1.12rem;
  line-height: 1.35;
}

.calculator-preview__url {
  margin-top: 0.35rem;
  color: #166534;
  font-size: 0.9rem;
  word-break: break-word;
}

.calculator-preview__description {
  margin-top: 0.45rem;
  color: #475569;
  line-height: 1.6;
}

.calculator-preview__note {
  margin-top: 0.7rem;
  color: #64748b;
  line-height: 1.55;
}

.calculator-preview[data-truncated="true"] .calculator-preview__description {
  color: #9a3412;
}

.calculator-result__proposal h4 {
  margin: 0 0 0.55rem;
}

.calculator-result__proposal pre {
  margin: 0;
  padding: 1rem;
  border-radius: 16px;
  border: 1px solid #d7e0ea;
  background: #ffffff;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: Consolas, "Courier New", monospace;
  color: #1e293b;
  line-height: 1.6;
}

.calculator-faq__list {
  display: grid;
  gap: 0.85rem;
}

.calculator-faq__item {
  border: 1px solid #d7e0ea;
  border-radius: 18px;
  padding: 0 1.1rem;
  background: #ffffff;
}

.calculator-faq__item summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 0;
  font-weight: 700;
  color: #0f172a;
}

.calculator-faq__item summary::-webkit-details-marker {
  display: none;
}

.calculator-faq__item p {
  margin: 0 0 1rem;
  color: #475569;
  line-height: 1.65;
}

.calculator-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.2rem;
  align-items: center;
}

.calculator-cta__copy p:last-child {
  margin-bottom: 0;
  color: #475569;
  line-height: 1.7;
}

.calculator-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: flex-end;
}

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

@media (max-width: 960px) {
  .calculator-toolbar,
  .calculator-grid,
  .calculator-form__grid,
  .calculator-cta {
    grid-template-columns: 1fr;
  }

  .calculator-result__metrics {
    grid-template-columns: 1fr;
  }

  .calculator-result__metrics dd {
    text-align: left;
  }

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

  .calculator-cta__actions {
    justify-content: flex-start;
  }

  .calculator-progress__header,
  .calculator-preview__heading {
    align-items: start;
  }
}

@media (max-width: 680px) {
  .calculator-shell {
    padding-top: 1.8rem;
  }

  .calculator-hero {
    padding: 1.8rem;
  }

  .calculator-card__summary,
  .calculator-card__body,
  .calculator-empty-state,
  .calculator-faq,
  .calculator-cta {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .calculator-card__summary {
    align-items: start;
  }
}