/* SheetMetalCalc — Design Preview v2 (industrial premium) */

:root {
  --graphite: #0e1218;
  --navy: #15202b;
  --navy-soft: #1c2a38;
  --steel: #5c6b7a;
  --steel-light: #8b98a8;
  --off-white: #f6f4f0;
  --canvas: #faf9f7;
  --white: #ffffff;
  --ink: #1a2332;
  --ink-muted: #3d4a59;
  --ink-soft: #5a6674;
  --electric: #2b8cff;
  --electric-hover: #1a74db;
  --electric-glow: rgba(43, 140, 255, 0.22);
  --amber: #e8952e;
  --amber-soft: rgba(232, 149, 46, 0.15);
  --border: #d9dde4;
  --border-dark: rgba(255, 255, 255, 0.1);
  --success: #22a06b;

  --font-sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Cascadia Mono", "Consolas", "Segoe UI Mono", monospace;

  --text-base: 1.0625rem;
  --text-lg: 1.1875rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: clamp(2rem, 3vw, 2.5rem);
  --text-4xl: clamp(2.5rem, 4.2vw, 3.35rem);
  --text-display: clamp(2.625rem, 5vw, 3.75rem);

  --container: 80rem;
  --header-h: 4.25rem;
  --radius: 6px;
  --radius-lg: 10px;
  --shadow-deep: 0 24px 60px rgba(14, 18, 24, 0.35);
  --shadow-lift: 0 16px 40px rgba(14, 18, 24, 0.12);
  --ease: 200ms ease;
}
/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3rem;
  padding: 0 1.5rem;
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--ease), border-color var(--ease), transform var(--ease);
}

.btn--primary {
  background: var(--electric);
  color: var(--white);
  border-color: var(--electric);
  box-shadow: 0 4px 14px var(--electric-glow);
}

.btn--primary:hover {
  background: var(--electric-hover);
  color: var(--white);
}

.btn--secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
}

.btn--secondary:hover {
  border-color: var(--steel);
  color: var(--ink);
}

.btn--amber {
  background: var(--amber);
  color: var(--graphite);
  border-color: var(--amber);
}

.btn--ghost-light {
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  border-color: var(--border-dark);
}

.btn--block {
  width: 100%;
}
/* Calculator page */
.calc-hero {
  padding: 2.5rem 0 2rem;
  background: var(--off-white);
  border-bottom: 1px solid var(--border);
}

.calc-hero h1 {
  margin: 0 0 0.75rem;
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--ink);
}

.calc-hero p {
  margin: 0;
  max-width: 40rem;
  font-size: var(--text-lg);
  color: var(--ink-soft);
}

.breadcrumbs {
  padding: 1rem 0 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li::after {
  content: "›";
  margin-left: 0.5rem;
  color: var(--steel-light);
}

.breadcrumbs li:last-child::after {
  content: none;
}

.breadcrumbs a {
  color: var(--ink-soft);
  text-decoration: none;
}

.breadcrumbs [aria-current="page"] {
  color: var(--ink);
}

.calc-workspace {
  padding: 2.5rem 0 4rem;
}

.calc-workspace__grid {
  display: grid;
  gap: 1.5rem;
  align-items: start;
}

.calc-main {
  background: linear-gradient(165deg, #1a2531, var(--graphite));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-deep);
  overflow: hidden;
}

.calc-main__head {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-dark);
}

.calc-main__head h2 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--white);
}

.calc-main__head p {
  margin: 0.35rem 0 0;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
}

.calc-form {
  padding: 1.5rem;
}

.calc-form fieldset {
  margin: 0;
  padding: 0 0 1.5rem;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.calc-form fieldset:last-of-type {
  border-bottom: 0;
  padding-bottom: 0.5rem;
}

.calc-form .form-field {
  margin-bottom: 0.25rem;
}

.calc-form legend {
  padding: 0;
  margin-bottom: 1rem;
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
}

.calc-form label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.75);
}

.calc-form input,
.calc-form select {
  width: 100%;
  min-height: 2.85rem;
  padding: 0 0.85rem;
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
}

.calc-form input::placeholder {
  color: rgba(255, 255, 255, 0.35);
  font-weight: 500;
}

.calc-form input:focus,
.calc-form select:focus,
.calc-form input:focus-visible,
.calc-form select:focus-visible,
.btn:focus-visible {
  outline: none;
  border-color: var(--electric);
  box-shadow: 0 0 0 3px var(--electric-glow);
}

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

.calc-form .input-with-unit {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
}

.calc-form .input-with-unit select {
  min-width: 5.25rem;
}

.calc-form .form-hint {
  margin: 0.35rem 0 0;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.45);
}

.calc-form .form-check {
  display: flex;
  gap: 0.65rem;
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.55);
}

.calc-form .form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.calc-sidebar {
  display: grid;
  gap: 1.25rem;
}

.results-hero {
  padding: 1.5rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lift);
}

.results-hero h3 {
  margin: 0 0 1rem;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--ink);
}

.results-empty {
  padding: 2rem 1rem;
  text-align: center;
  background: var(--off-white);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
}

.results-empty p {
  margin: 0 auto;
  max-width: 16rem;
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.results-metrics {
  display: grid;
  gap: 0.5rem;
}

.results-metric {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--off-white);
  border-radius: var(--radius);
}

.results-metric span:last-child {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  color: rgba(26, 35, 50, 0.35);
}

.side-card {
  padding: 1.25rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.side-card h3 {
  margin: 0 0 0.65rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--ink);
}

.side-card p,
.side-card ul {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-soft);
}

.side-card ul {
  padding-left: 1.15rem;
}

.ref-table-wrap {
  overflow-x: auto;
  margin-top: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.ref-table th,
.ref-table td {
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.ref-table th {
  font-weight: 800;
  color: var(--ink);
  background: var(--off-white);
}

.ref-table td {
  color: var(--steel);
}

.calc-below {
  padding: 0 0 3rem;
}

.calc-below .formula-dark {
  margin-bottom: 2.5rem;
}

.related-links {
  display: grid;
  gap: 0.5rem;
}

.related-links a {
  display: block;
  padding: 0.85rem 1rem;
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.related-links a:hover {
  border-color: var(--electric);
  color: var(--electric);
}

@media (min-width: 1024px) {
  .calc-workspace__grid {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .calc-form .form-row--2 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px) {
  .calc-form .form-row--3 {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

/* Plugin-specific */
.smc-calculator { width: 100%; }
.smc-thickness-mode { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 0.35rem; font-size: 0.875rem; color: rgba(255,255,255,0.75); }
.smc-thickness-mode label { display: inline-flex; align-items: center; gap: 0.35rem; cursor: pointer; }
.smc-form-errors { color: #ffb4b4; font-size: 0.875rem; margin: 0.5rem 0 0; }
.results-loading, .results-error { padding: 1.5rem 1rem; text-align: center; font-size: 0.9375rem; color: var(--ink-soft); }
.results-error { color: #c62828; background: #ffebee; border-radius: var(--radius); }
.smc-total-highlight { margin: 0 0 1rem; padding: 1rem; background: var(--off-white); border-radius: var(--radius); border: 1px solid var(--border); }
.smc-total-highlight span { display: block; font-size: 0.75rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); }
.smc-total-highlight strong { display: block; font-size: 1.75rem; font-weight: 800; color: var(--ink); font-variant-numeric: tabular-nums; }
.smc-total-highlight small { display: block; margin-top: 0.25rem; font-size: 1rem; color: var(--ink-muted); font-variant-numeric: tabular-nums; }
.results-input-summary {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.results-metric--summary span:first-child { color: var(--ink-muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; }
.smc-formula-note { margin: 1rem 0 0; font-size: 0.8125rem; color: var(--ink-soft); }
.smc-density-reset-wrap .btn { min-height: 2.85rem; width: 100%; }
.results-metric span:last-child { color: var(--ink); }
.results-success .results-metric span:last-child { color: var(--ink); }