:root {
  --bg: #f3f7fb;
  --panel: #ffffff;
  --panel-strong: #0047aa;
  --panel-strong-2: #278ebb;
  --text: #263648;
  --text-muted: #627287;
  --line: rgba(0, 71, 170, 0.10);
  --accent: #c16b84;
  --star: #c97f00;
  --shadow: 0 12px 28px rgba(12, 56, 122, 0.08);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

#ls-optical-calculator-root * { box-sizing: border-box; }
#ls-optical-calculator-root { color: var(--text); font-family: inherit; }
#ls-optical-calculator-root .app-shell { display: grid; grid-template-columns: minmax(260px, 320px) 1fr; background: linear-gradient(180deg, #ffffff 0%, var(--bg) 100%); border: 1px solid rgba(0, 71, 170, 0.08); border-radius: 28px; overflow: clip; box-shadow: 0 18px 44px rgba(12, 56, 122, 0.08); }
#ls-optical-calculator-root .sidebar { position: sticky; top: 0; align-self: start; max-height: 100vh; overflow: auto; padding: 28px 20px; background: linear-gradient(180deg, rgba(244, 249, 255, 0.98), rgba(255, 255, 255, 0.94)); border-right: 1px solid var(--line); }
#ls-optical-calculator-root .brand { padding: 10px 8px 20px; border-bottom: 1px solid rgba(0, 71, 170, 0.08); margin-bottom: 14px; }
#ls-optical-calculator-root .eyebrow { margin: 0 0 6px; color: var(--accent); text-transform: uppercase; letter-spacing: 0.16em; font-size: 0.73rem; font-weight: 700; }
#ls-optical-calculator-root h1, #ls-optical-calculator-root h2, #ls-optical-calculator-root h3, #ls-optical-calculator-root h4, #ls-optical-calculator-root p { margin: 0; }
#ls-optical-calculator-root h1, #ls-optical-calculator-root #calculator-title, #ls-optical-calculator-root .input-card h4, #ls-optical-calculator-root .results-card h4 { font-family: inherit; }
#ls-optical-calculator-root h1 { font-size: clamp(1.35rem, 2.1vw, 1.8rem); line-height: 1.08; overflow-wrap: anywhere; color: #13365f; }
#ls-optical-calculator-root .sidebar-section + .sidebar-section { margin-top: 18px; }
#ls-optical-calculator-root .section-head { display: flex; align-items: center; justify-content: space-between; padding: 0 8px 10px; }
#ls-optical-calculator-root .stack-list, #ls-optical-calculator-root .card-grid, #ls-optical-calculator-root .results-grid { display: grid; gap: 12px; }
#ls-optical-calculator-root .stack-item { border: 1px solid rgba(0, 71, 170, 0.08); background: rgba(255,255,255,0.92); border-radius: var(--radius-md); padding: 12px 14px; text-align: left; cursor: pointer; transition: border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease, background-color 120ms ease; }
#ls-optical-calculator-root .stack-item:hover { transform: translateY(-1px); border-color: rgba(39, 142, 187, 0.30); background: #ffffff; box-shadow: 0 8px 18px rgba(12, 56, 122, 0.06); }
#ls-optical-calculator-root .stack-item.active { background: linear-gradient(180deg, #ffffff, #f5faff); border-color: rgba(39, 142, 187, 0.34); box-shadow: 0 10px 22px rgba(39, 142, 187, 0.10); }
#ls-optical-calculator-root .stack-item-row { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; }
#ls-optical-calculator-root .stack-item-title { margin-bottom: 0; font-weight: 700; line-height: 1.25; }
#ls-optical-calculator-root .stack-item-star { border: 0; background: transparent; cursor: pointer; color: var(--text-muted); font-size: 1.1rem; }
#ls-optical-calculator-root .stack-item-star.active, #ls-optical-calculator-root .favorite-toggle.active { color: var(--star); }
#ls-optical-calculator-root .content { padding: 20px; }
#ls-optical-calculator-root .hero { display: flex; justify-content: space-between; gap: 18px; background: linear-gradient(180deg, #ffffff 0%, #f6fbff 100%); color: var(--text); border: 1px solid rgba(39, 142, 187, 0.14); border-radius: var(--radius-lg); padding: 20px; box-shadow: var(--shadow); position: relative; }
#ls-optical-calculator-root .hero::before { content: ""; position: absolute; top: 14px; bottom: 14px; left: 0; width: 6px; border-radius: 0 999px 999px 0; background: linear-gradient(180deg, var(--panel-strong) 0%, var(--panel-strong-2) 100%); }
#ls-optical-calculator-root #calculator-title { color: #13365f; padding-left: 8px; }
#ls-optical-calculator-root .hero-copy { margin-top: 10px; color: var(--text-muted); line-height: 1.45; padding-left: 8px; }
#ls-optical-calculator-root .favorite-toggle { border: 1px solid rgba(39, 142, 187, 0.22); background: #ffffff; color: #2b5ea8; border-radius: 999px; padding: 10px 14px; cursor: pointer; font-size: 1.1rem; line-height: 1; min-width: 48px; box-shadow: 0 6px 14px rgba(12, 56, 122, 0.06); }
#ls-optical-calculator-root .workspace { display: grid; grid-template-columns: 1fr; gap: 14px; margin-top: 14px; }
#ls-optical-calculator-root .panel { background: var(--panel); border-radius: var(--radius-lg); padding: 14px; box-shadow: var(--shadow); border: 1px solid rgba(0, 71, 170, 0.07); }
#ls-optical-calculator-root .panel-inputs { min-height: 360px; }
#ls-optical-calculator-root .panel-results { min-height: 220px; }
#ls-optical-calculator-root .results-description, #ls-optical-calculator-root .empty-state { color: var(--text-muted); margin-bottom: 10px; }
#ls-optical-calculator-root .input-card { border: 1px solid var(--line); border-radius: var(--radius-md); padding: 14px; background: linear-gradient(180deg, rgba(255,255,255,1), rgba(251,253,255,1)); }
#ls-optical-calculator-root .field-grid { display: grid; grid-template-columns: repeat(var(--columns, 2), minmax(0, 1fr)); gap: 12px; }
#ls-optical-calculator-root .field { display: grid; gap: 7px; min-width: 0; }
#ls-optical-calculator-root .field-label { font-size: 0.82rem; font-weight: 700; color: var(--text-muted); letter-spacing: 0.01em; }
#ls-optical-calculator-root .field-input-wrap { position: relative; }
#ls-optical-calculator-root .field-control, #ls-optical-calculator-root .field-output { width: 100%; max-width: 100%; min-width: 0; border: 1px solid rgba(39, 142, 187, 0.16); border-radius: var(--radius-sm); background: #fff; color: var(--text); min-height: 46px; padding: 11px 14px; box-shadow: inset 0 1px 2px rgba(12, 56, 122, 0.03); }
#ls-optical-calculator-root .field-control:focus { outline: 2px solid rgba(39, 142, 187, 0.16); border-color: #278ebb; box-shadow: 0 0 0 4px rgba(39, 142, 187, 0.08); }
#ls-optical-calculator-root select.field-control { appearance: none; -webkit-appearance: none; text-overflow: ellipsis; white-space: nowrap; overflow: hidden; padding-right: 14px; }
#ls-optical-calculator-root .field-spinner { position: absolute; top: 6px; right: 6px; bottom: 6px; display: flex; flex-direction: column; gap: 3px; width: 26px; }
#ls-optical-calculator-root .spinner-button { flex: 1; border: 0; border-radius: 6px; background: rgba(39,142,187,0.08); color: #0047aa; cursor: pointer; padding: 0; line-height: 1; font-size: 0.6rem; font-weight: 700; transition: background-color 120ms ease, color 120ms ease; }
#ls-optical-calculator-root .spinner-button:hover { background: rgba(39,142,187,0.16); color: #003985; }
#ls-optical-calculator-root .prefix, #ls-optical-calculator-root .suffix { position: absolute; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-weight: 700; pointer-events: none; z-index: 1; }
#ls-optical-calculator-root .prefix { left: 14px; }
#ls-optical-calculator-root .suffix { right: 40px; }
#ls-optical-calculator-root .has-prefix .field-control { padding-left: 28px; }
#ls-optical-calculator-root .has-suffix .field-control { padding-right: 72px; }
#ls-optical-calculator-root .field-input-wrap .field-control[type="text"] { padding-right: 38px; }
#ls-optical-calculator-root .has-suffix .field-input-wrap .field-control[type="text"] { padding-right: 76px; }
#ls-optical-calculator-root .results-card { background: linear-gradient(135deg, #0d4fae 0%, #2f91bb 100%); color: white; border-radius: var(--radius-md); padding: 14px; box-shadow: inset 0 1px 0 rgba(255,255,255,0.12); }
#ls-optical-calculator-root .results-card .field-label { color: rgba(255,255,255,0.76); }
#ls-optical-calculator-root .field-output { background: rgba(255,255,255,0.10); border-color: rgba(255,255,255,0.12); color: white; display: flex; align-items: center; font-weight: 700; }
#ls-optical-calculator-root.is-calculating .results-card { opacity: 0.72; transform: translateY(1px); transition: opacity 120ms ease, transform 120ms ease; }
#ls-optical-calculator-root.is-calculating .field-output { animation: lsoc-pulse 0.8s ease-in-out infinite alternate; }
#ls-optical-calculator-root.is-calculating .panel-inputs,
#ls-optical-calculator-root.is-calculating .panel-results { position: relative; }
#ls-optical-calculator-root .empty-state { border: 1px dashed var(--line); border-radius: var(--radius-md); padding: 14px; background: rgba(244, 249, 255, 0.6); }

@keyframes lsoc-pulse {
  from { background: rgba(255,255,255,0.08); }
  to { background: rgba(255,255,255,0.16); }
}

@media (max-width: 880px) { #ls-optical-calculator-root .app-shell { grid-template-columns: 1fr; border-radius: 22px; } #ls-optical-calculator-root .sidebar { border-right: 0; border-bottom: 1px solid var(--line); } }
@media (max-width: 640px) {
  #ls-optical-calculator-root .content { padding: 14px; }
  #ls-optical-calculator-root .sidebar { padding: 18px 14px; }
  #ls-optical-calculator-root .hero { padding: 18px; flex-direction: column; }
  #ls-optical-calculator-root .stack-item-row { flex-direction: column; }
  #ls-optical-calculator-root .field-grid { grid-template-columns: 1fr; }
}