.flcc-calculator,
.flcc-calculator * {
  box-sizing: border-box;
}

.flcc-calculator {
  --flcc-bg: #f3f5f7;
  --flcc-panel: #ffffff;
  --flcc-panel-strong: #eef1f4;
  --flcc-text: #111827;
  --flcc-muted: #5f6b7a;
  --flcc-border: #d8dee6;
  --flcc-border-strong: #b8c1cc;
  --flcc-accent: #374151;
  --flcc-accent-strong: #111827;
  --flcc-accent-soft: #e5e7eb;
  --flcc-good: #116149;
  --flcc-warning: #8a4b00;
  --flcc-shadow: 0 18px 45px rgba(15, 23, 42, 0.13);
  --flcc-radius-lg: 24px;
  --flcc-radius-md: 16px;
  --flcc-radius-sm: 12px;
  color: var(--flcc-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.5;
  margin: 0 auto;
  max-width: 1240px;
  width: 100%;
}

.flcc-calculator[data-theme="dark"] {
  --flcc-bg: #101318;
  --flcc-panel: #171b22;
  --flcc-panel-strong: #202631;
  --flcc-text: #f8fafc;
  --flcc-muted: #b7c0cc;
  --flcc-border: #303946;
  --flcc-border-strong: #4b5563;
  --flcc-accent: #cbd5e1;
  --flcc-accent-strong: #ffffff;
  --flcc-accent-soft: #28303d;
  --flcc-good: #70e0b8;
  --flcc-warning: #ffc46b;
  --flcc-shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
}

.flcc-shell {
  background:
    radial-gradient(circle at top left, rgba(148, 163, 184, 0.2), transparent 32rem),
    var(--flcc-bg);
  border: 1px solid var(--flcc-border);
  border-radius: var(--flcc-radius-lg);
  box-shadow: var(--flcc-shadow);
  overflow: hidden;
  padding: clamp(16px, 3vw, 28px);
}

.flcc-header {
  align-items: flex-start;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 18px;
}

.flcc-eyebrow {
  color: var(--flcc-muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  margin: 0 0 4px;
  text-transform: uppercase;
}

.flcc-header h2 {
  color: var(--flcc-text);
  font-size: clamp(1.45rem, 3vw, 2.3rem);
  line-height: 1.1;
  margin: 0;
}

.flcc-theme-toggle,
.flcc-btn {
  align-items: center;
  background: var(--flcc-accent);
  border: 1px solid transparent;
  border-radius: 999px;
  color: #ffffff;
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-weight: 800;
  gap: 8px;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
}

.flcc-calculator[data-theme="dark"] .flcc-theme-toggle,
.flcc-calculator[data-theme="dark"] .flcc-btn {
  color: #111827;
}

.flcc-theme-toggle:hover,
.flcc-btn:hover {
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.16);
  transform: translateY(-1px);
}

.flcc-theme-toggle:focus-visible,
.flcc-btn:focus-visible,
.flcc-field input:focus-visible,
.flcc-field select:focus-visible,
.flcc-check input:focus-visible {
  outline: 3px solid var(--flcc-warning);
  outline-offset: 3px;
}

.flcc-layout {
  display: grid;
  gap: 18px;
}

.flcc-panel {
  background: var(--flcc-panel);
  border: 1px solid var(--flcc-border);
  border-radius: var(--flcc-radius-lg);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  min-width: 0;
  padding: clamp(16px, 2.4vw, 24px);
}

.flcc-panel-heading {
  border-bottom: 1px solid var(--flcc-border);
  margin-bottom: 18px;
  padding-bottom: 14px;
}

.flcc-panel-heading h3,
.flcc-subsection h4 {
  color: var(--flcc-text);
  line-height: 1.2;
  margin: 0;
}

.flcc-panel-heading p,
.flcc-status {
  color: var(--flcc-muted);
  margin: 6px 0 0;
}

.flcc-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.flcc-subsection {
  background: var(--flcc-panel-strong);
  border: 1px solid var(--flcc-border);
  border-radius: var(--flcc-radius-md);
  margin-top: 18px;
  padding: 16px;
}

.flcc-subsection h4 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.flcc-field {
  color: var(--flcc-text);
  display: grid;
  font-weight: 750;
  gap: 7px;
  min-width: 0;
}

.flcc-field span {
  align-items: center;
  display: flex;
  gap: 6px;
  justify-content: space-between;
}

.flcc-field input,
.flcc-field select {
  appearance: none;
  background: var(--flcc-panel);
  border: 1px solid var(--flcc-border-strong);
  border-radius: var(--flcc-radius-sm);
  color: var(--flcc-text);
  font: inherit;
  min-height: 46px;
  padding: 10px 12px;
  width: 100%;
}

.flcc-field select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--flcc-muted) 50%),
    linear-gradient(135deg, var(--flcc-muted) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 50%,
    calc(100% - 12px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 34px;
}

.flcc-field input[type="range"] {
  cursor: pointer;
  padding: 0;
}

.flcc-field input.flcc-invalid {
  border-color: #b42318;
  box-shadow: 0 0 0 3px rgba(180, 35, 24, 0.14);
}

.flcc-options {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.flcc-check {
  align-items: flex-start;
  background: var(--flcc-panel-strong);
  border: 1px solid var(--flcc-border);
  border-radius: var(--flcc-radius-sm);
  color: var(--flcc-text);
  cursor: pointer;
  display: flex;
  gap: 10px;
  padding: 12px;
}

.flcc-check input {
  accent-color: var(--flcc-accent-strong);
  flex: 0 0 auto;
  height: 20px;
  margin-top: 2px;
  width: 20px;
}

.flcc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.flcc-btn-secondary {
  background: var(--flcc-panel);
  border-color: var(--flcc-border-strong);
  color: var(--flcc-text);
}

.flcc-calculator[data-theme="dark"] .flcc-btn-secondary {
  color: var(--flcc-text);
}

.flcc-result-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.flcc-result-card {
  background: var(--flcc-panel-strong);
  border: 1px solid var(--flcc-border);
  border-radius: var(--flcc-radius-md);
  padding: 16px;
}

.flcc-result-card span {
  color: var(--flcc-muted);
  display: block;
  font-size: 0.88rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.flcc-result-card strong {
  color: var(--flcc-text);
  display: block;
  font-size: clamp(1.2rem, 4vw, 1.8rem);
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.flcc-primary-result {
  background: linear-gradient(135deg, var(--flcc-accent-strong), var(--flcc-accent));
}

.flcc-primary-result span,
.flcc-primary-result strong {
  color: #ffffff;
}

.flcc-calculator[data-theme="dark"] .flcc-primary-result span,
.flcc-calculator[data-theme="dark"] .flcc-primary-result strong {
  color: #111827;
}

.flcc-range {
  margin: 18px 0;
}

.flcc-range-track {
  background: var(--flcc-panel-strong);
  border: 1px solid var(--flcc-border);
  border-radius: 999px;
  height: 16px;
  overflow: hidden;
}

.flcc-range-track span {
  background: linear-gradient(90deg, var(--flcc-good), var(--flcc-warning));
  display: block;
  height: 100%;
  min-width: 18%;
  width: 65%;
}

.flcc-range-values {
  color: var(--flcc-muted);
  display: flex;
  font-size: 0.92rem;
  font-weight: 800;
  justify-content: space-between;
  margin-top: 8px;
}

.flcc-chart {
  background: var(--flcc-panel-strong);
  border: 1px solid var(--flcc-border);
  border-radius: var(--flcc-radius-md);
  display: block;
  height: auto;
  margin: 18px 0;
  max-width: 100%;
  width: 100%;
}

.flcc-table-wrap {
  border: 1px solid var(--flcc-border);
  border-radius: var(--flcc-radius-md);
  overflow-x: auto;
}

.flcc-breakdown {
  border-collapse: collapse;
  color: var(--flcc-text);
  min-width: 420px;
  width: 100%;
}

.flcc-breakdown caption {
  color: var(--flcc-muted);
  font-weight: 800;
  padding: 12px;
  text-align: left;
}

.flcc-breakdown th,
.flcc-breakdown td {
  border-top: 1px solid var(--flcc-border);
  padding: 12px;
  text-align: left;
}

.flcc-breakdown th:last-child,
.flcc-breakdown td:last-child {
  text-align: right;
}

.flcc-breakdown tbody tr:nth-child(odd) {
  background: var(--flcc-panel-strong);
}

.flcc-note {
  background: var(--flcc-panel-strong);
  border: 1px solid var(--flcc-border);
  border-radius: var(--flcc-radius-md);
  color: var(--flcc-muted);
  font-weight: 700;
  margin-top: 16px;
  padding: 14px;
}

.flcc-actions-results .flcc-btn {
  flex: 1 1 145px;
}

@media (min-width: 640px) {
  .flcc-grid,
  .flcc-result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .flcc-layout {
    align-items: start;
    grid-template-columns: minmax(0, 1.25fr) minmax(360px, 0.75fr);
  }

  .flcc-results {
    position: sticky;
    top: 24px;
  }
}

@media (min-width: 1180px) {
  .flcc-inputs > .flcc-grid,
  .flcc-subsection .flcc-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .flcc-header {
    display: grid;
  }

  .flcc-theme-toggle,
  .flcc-btn {
    width: 100%;
  }

  .flcc-shell,
  .flcc-panel,
  .flcc-subsection {
    border-radius: 18px;
  }
}

@media print {
  body * {
    visibility: hidden !important;
  }

  .flcc-calculator,
  .flcc-calculator * {
    visibility: visible !important;
  }

  .flcc-calculator {
    left: 0;
    max-width: none;
    position: absolute;
    top: 0;
    width: 100%;
  }

  .flcc-actions,
  .flcc-theme-toggle {
    display: none !important;
  }

  .flcc-shell,
  .flcc-panel {
    box-shadow: none !important;
  }
}