.lt-page { padding: 56px 0 100px; }
.lt-intro { text-align: center; max-width: 56ch; margin: 0 auto 30px; }
.lt-intro .hero__eyebrow { margin-bottom: 18px; }
.lt-intro h1 { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.4rem); letter-spacing: -0.02em; margin: 0 0 10px; }
.lt-intro p { color: var(--ink-soft); margin: 0; line-height: 1.6; }

.lt-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.lt-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 24px; }
.lt-card-head h2 { font-family: var(--font-display); font-size: 1.15rem; margin: 0 0 16px; }

.lt-triangle { display: flex; justify-content: center; margin-bottom: 20px; }
.lt-triangle-center { background: rgba(231,76,60,0.08); border: 2px solid rgba(231,76,60,0.3); color: #c0392b; font-family: var(--font-mono); font-weight: 700; font-size: 1.15rem; padding: 14px 26px; border-radius: 14px; }

.lt-fields { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.lt-fields--2col { grid-template-columns: repeat(3, 1fr); }
.lt-field { display: flex; flex-direction: column; gap: 6px; }
.lt-field label { font-size: 0.78rem; font-weight: 600; color: var(--ink-soft); }
.lt-field input, .lt-select { border: 2px solid var(--line); border-radius: 12px; padding: 11px 13px; font-family: var(--font-mono); font-size: 1rem; font-weight: 600; background: var(--bg); color: var(--ink); transition: border-color var(--dur-fast) var(--ease); }
.lt-field input:focus, .lt-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(var(--accent-rgb, 11, 122, 85),0.12); }
.lt-output { border: 2px solid var(--line); border-radius: 12px; padding: 11px 13px; font-family: var(--font-mono); font-size: 1rem; font-weight: 700; color: var(--accent-ink); background: rgba(var(--accent-rgb, 11, 122, 85),0.06); min-height: 21px; word-break: break-all; }
.lt-hint { font-size: 0.8rem; color: var(--ink-soft); margin: 12px 0 0; line-height: 1.5; }

.lt-kwh { margin-top: 14px; }
.lt-seri-result { display: flex; align-items: center; justify-content: space-between; gap: 12px; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 16px; margin-top: 10px; }
.lt-result-label { font-size: 0.82rem; font-weight: 600; color: var(--ink-soft); }
.lt-result-value { font-family: var(--font-mono); font-size: 1.05rem; font-weight: 700; color: var(--accent-ink); }

.lt-color-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 16px; }
.lt-select { padding: 10px 8px; font-size: 0.85rem; cursor: pointer; }

.lt-resistor { display: flex; justify-content: center; margin: 18px 0; }
.lt-resistor__body { position: relative; width: 240px; height: 46px; background: #e7c7a0; border-radius: 12px; box-shadow: inset 0 -4px 10px rgba(0,0,0,0.15); display: flex; align-items: center; gap: 0; padding: 0 26px; }
.lt-band { width: 14px; height: 100%; display: block; }
.lt-band--wide { width: 22px; margin-left: auto; margin-right: 0; }
.lt-resistor__body::before, .lt-resistor__body::after { content: ''; position: absolute; top: 50%; transform: translateY(-50%); width: 46px; height: 18px; background: #d4a86e; border-radius: 999px; }
.lt-resistor__body::before { left: -34px; }
.lt-resistor__body::after { right: -34px; }

.lt-color-table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 0.8rem; }
.lt-color-table th { text-align: left; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-soft); padding: 6px 8px; border-bottom: 1px solid var(--line); }
.lt-color-table td { padding: 6px 8px; border-bottom: 1px solid var(--line); font-family: var(--font-mono); }
.lt-color-swatch { width: 12px; height: 12px; border-radius: 3px; display: inline-block; margin-right: 6px; vertical-align: middle; border: 1px solid rgba(0,0,0,0.15); }

@media (max-width: 880px) {
  .lt-layout { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .lt-fields, .lt-fields--2col { grid-template-columns: 1fr; }
  .lt-color-row { grid-template-columns: repeat(2, 1fr); }
}