:root{
  --steel-950:#161412; --steel-900:#201d1a; --steel-700:#443e34; --steel-500:#8a8172;
  --paper-dim:#c9c1b1; --safety:#f2c14e; --ink:#17140f;
  --f-display:'Oswald', sans-serif; --f-body:'Barlow', sans-serif; --f-mono:'IBM Plex Mono', monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--f-body);
  background: var(--steel-950);
  color: var(--paper-dim);
  min-height: 100vh;
  position: relative;
}
body::before {
  content: ''; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: url('/assets/logo-watermark.png');
  background-repeat: no-repeat; background-position: center 55%; background-size: 760px auto;
  opacity: .05;
}
.hazard-bar{height:7px; width:100%; background:repeating-linear-gradient(-45deg, var(--safety), var(--safety) 12px, var(--ink) 12px, var(--ink) 24px); position:relative; z-index:1;}
.topbar{
  display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px;
  padding:18px 32px; background:var(--steel-900); border-bottom:2px solid var(--steel-700);
  position:relative; z-index:1;
}
.brand{display:flex; align-items:center; gap:14px;}
.brand-mark{display:flex; align-items:center; justify-content:center;}
.brand-mark img{width:44px; height:auto; display:block;}
.rivet{position:absolute; width:5px; height:5px; border-radius:50%; background:var(--steel-500);}
.rivet.tl{top:4px; left:4px;} .rivet.tr{top:4px; right:4px;} .rivet.bl{bottom:4px; left:4px;} .rivet.br{bottom:4px; right:4px;}
.brand-text{font-family:var(--f-display); font-weight:600; font-size:17px; color:#fff; text-transform:uppercase; letter-spacing:.3px;}
.brand-sub{font-family:var(--f-mono); font-size:10px; color:var(--steel-500); margin-top:2px;}
.topbar-actions{display:flex; align-items:center; gap:10px;}
.ghost-link-btn{background:none; border:1px solid var(--steel-700); color:var(--paper-dim); border-radius:4px; padding:8px 13px; font-size:12px; text-decoration:none; display:inline-block; font-family:var(--f-mono);}
.ghost-link-btn:hover{border-color:var(--safety); color:#fff;}

/* LMS Strip Width Calculator — styles are scoped under .lms-swc so they
   never leak into the rest of the page. The calculator card itself stays
   light/white for legibility of the numbers, sitting on the dark shell
   above — same "light content on dark chrome" pattern used elsewhere. */

.lms-swc {
  --lms-swc-bg: #ffffff;
  --lms-swc-card: #f6f7f8;
  --lms-swc-card-border: #e3e7ea;
  --lms-swc-field: #eef0f2;
  --lms-swc-text: #171b1f;
  --lms-swc-text-dim: #697680;
  --lms-swc-accent: #b9701f;
  --lms-swc-accent-dim: #8f5817;
  --lms-swc-good-bg: #e9f6ee;
  --lms-swc-good-border: #bfe6cc;
  --lms-swc-good-text: #2f7a4d;
  --lms-swc-radius: 14px;

  box-sizing: border-box;
  background: transparent;
  color: var(--lms-swc-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding: 36px 20px 60px;
  position: relative;
  z-index: 1;
}
.lms-swc *,
.lms-swc *::before,
.lms-swc *::after {
  box-sizing: border-box;
}
.lms-swc-app {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
}

.lms-swc-header {
  text-align: center;
  margin-bottom: 28px;
}
.lms-swc-title {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
  color: #ffffff;
}
.lms-swc-subtitle {
  color: var(--paper-dim);
  font-size: 14px;
  margin: 0;
}
.lms-swc-unit-toggle {
  display: inline-flex;
  margin-top: 18px;
  background: var(--lms-swc-field);
  border: 1px solid var(--lms-swc-card-border);
  border-radius: 10px;
  padding: 3px;
}
.lms-swc-unit-btn {
  background: none;
  border: none;
  padding: 7px 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--lms-swc-text-dim);
  cursor: pointer;
  border-radius: 7px;
  font-family: inherit;
}
.lms-swc-unit-btn.active {
  background: var(--lms-swc-accent);
  color: #fff;
}

.lms-swc-card {
  background: var(--lms-swc-card);
  border: 1px solid var(--lms-swc-card-border);
  border-radius: var(--lms-swc-radius);
  padding: 22px;
  margin-bottom: 16px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
}

.lms-swc-field {
  padding: 16px 0;
  border-bottom: 1px solid var(--lms-swc-card-border);
}
.lms-swc-field:last-of-type {
  border-bottom: none;
}
.lms-swc-field label {
  display: block;
  font-size: 14.5px;
  color: var(--lms-swc-text-dim);
  margin-bottom: 10px;
}
.lms-swc-field-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.lms-swc-field input[type="number"] {
  flex: 1;
  background: var(--lms-swc-field);
  border: 1px solid var(--lms-swc-card-border);
  border-radius: 10px;
  color: var(--lms-swc-text);
  font-size: 20px;
  font-weight: 600;
  padding: 12px 14px;
  text-align: right;
  width: 100%;
  -moz-appearance: textfield;
}
.lms-swc-field input[type="number"]::-webkit-outer-spin-button,
.lms-swc-field input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.lms-swc-field input:focus {
  outline: none;
  border-color: var(--lms-swc-accent);
}
.lms-swc-unit {
  color: var(--lms-swc-text-dim);
  font-size: 14px;
  min-width: 30px;
}
.lms-swc-stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--lms-swc-field);
  border: 1px solid var(--lms-swc-card-border);
  color: var(--lms-swc-text-dim);
  cursor: pointer;
  user-select: none;
  font-size: 16px;
}
.lms-swc-stepper:hover {
  color: var(--lms-swc-accent);
  border-color: var(--lms-swc-accent);
}
.lms-swc-calib-note {
  margin-top: 4px;
  background: var(--lms-swc-good-bg);
  border: 1px solid var(--lms-swc-good-border);
  color: var(--lms-swc-good-text);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14px;
}

.lms-swc-result-card {
  text-align: center;
  padding: 30px 22px;
}
.lms-swc-result-value {
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--lms-swc-text);
}
.lms-swc-unit-lg {
  font-size: 24px;
  font-weight: 700;
  color: var(--lms-swc-accent);
  margin-left: 6px;
}
.lms-swc-result-label {
  color: var(--lms-swc-text-dim);
  font-size: 14px;
  margin-top: 10px;
}
.lms-swc-breakdown {
  margin-top: 22px;
  background: var(--lms-swc-field);
  border: 1px solid var(--lms-swc-card-border);
  border-radius: 10px;
  padding: 16px 18px;
  text-align: left;
  font-size: 14px;
  line-height: 1.9;
  color: var(--lms-swc-text-dim);
}
.lms-swc-breakdown .lms-swc-final {
  color: var(--lms-swc-accent);
  font-weight: 600;
}

.lms-swc-card-heading {
  font-size: 14px;
  font-weight: 600;
  color: var(--lms-swc-text-dim);
  margin: 0 0 16px;
}
.lms-swc-calib-card .lms-swc-card-heading {
  font-size: 16px;
  margin: 0 0 4px;
}
.lms-swc-desc {
  color: var(--lms-swc-text-dim);
  font-size: 13px;
  margin: 0 0 18px;
  line-height: 1.6;
}
.lms-swc-calib-input-row {
  display: flex;
  gap: 10px;
}
.lms-swc-calib-input-row input {
  flex: 1;
  background: var(--lms-swc-field);
  border: 1px solid var(--lms-swc-card-border);
  border-radius: 10px;
  color: var(--lms-swc-text);
  font-size: 16px;
  padding: 12px 14px;
  min-width: 0;
}
.lms-swc-calib-input-row input:focus {
  outline: none;
  border-color: var(--lms-swc-accent);
}
.lms-swc-btn {
  background: var(--lms-swc-accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.lms-swc-btn:hover {
  background: var(--lms-swc-accent-dim);
}
.lms-swc-btn-ghost {
  background: none;
  color: var(--lms-swc-accent);
  border: 1.5px solid var(--lms-swc-card-border);
  padding: 9px 16px;
  height: auto;
  font-size: 13.5px;
}
.lms-swc-btn-ghost:hover {
  background: var(--lms-swc-field);
  border-color: var(--lms-swc-accent);
}
.lms-swc-seg-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.lms-swc-seg-row {
  padding: 14px 0;
  border-bottom: 1px solid var(--lms-swc-card-border);
}
.lms-swc-seg-row label {
  display: block;
  font-size: 12.5px;
  color: var(--lms-swc-text-dim);
  margin-bottom: 8px;
  font-weight: 600;
}
.lms-swc-seg-row .lms-swc-field-row input {
  font-size: 16px;
  padding: 9px 12px;
}
.lms-swc-bend-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 12px 14px;
  margin: 4px 0;
  background: var(--lms-swc-field);
  border-radius: 10px;
  border-left: 3px solid var(--lms-swc-accent);
}
.lms-swc-bend-angle, .lms-swc-bend-ded {
  flex: 1;
  min-width: 0;
}
.lms-swc-bend-row label {
  display: block;
  font-size: 11px;
  color: var(--lms-swc-text-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .3px;
}
.lms-swc-bend-row .lms-swc-field-row input {
  font-size: 14px;
  padding: 8px 10px;
  background: var(--lms-swc-bg, #fff);
  min-width: 0;
}
.lms-swc-bend-row .lms-swc-unit {
  min-width: auto;
  white-space: nowrap;
}
.lms-swc-reset-btn {
  background: none;
  border: 1px solid var(--lms-swc-card-border);
  color: var(--lms-swc-text-dim);
  border-radius: 8px;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  cursor: pointer;
  font-size: 15px;
}
.lms-swc-reset-btn:hover {
  color: var(--lms-swc-accent);
  border-color: var(--lms-swc-accent);
}
.lms-swc-saved-calib {
  margin-top: 18px;
}
.lms-swc-saved-label {
  color: var(--lms-swc-text-dim);
  font-size: 13px;
  margin-bottom: 8px;
}

.lms-swc-diagram-card svg {
  width: 100%;
  height: auto;
  display: block;
}
.lms-swc-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--lms-swc-text-dim);
}
.lms-swc-legend span b {
  color: var(--lms-swc-accent);
  font-weight: 600;
}

.lms-swc-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--lms-swc-field);
  border: 1px solid var(--lms-swc-card-border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13.5px;
  color: var(--lms-swc-text-dim);
  margin-right: 8px;
  margin-bottom: 8px;
}
.lms-swc-chip b {
  color: var(--lms-swc-accent);
  font-weight: 600;
}
.lms-swc-chip .lms-swc-x {
  margin-left: 6px;
  cursor: pointer;
  color: var(--lms-swc-text-dim);
}
.lms-swc-chip .lms-swc-x:hover {
  color: #d92d20;
}

.lms-swc-footer {
  text-align: center;
  color: var(--steel-500);
  font-size: 12px;
  margin-top: 24px;
  line-height: 1.7;
}

@media (max-width: 480px) {
  .lms-swc-bend-row {
    flex-wrap: wrap;
  }
  .lms-swc-bend-angle, .lms-swc-bend-ded {
    flex-basis: 100%;
  }
  .lms-swc-reset-btn {
    margin-left: auto;
  }
}

@media (max-width: 400px) {
  .lms-swc-result-value {
    font-size: 42px;
  }
}