.pcb-layout{display:grid;grid-template-columns:1fr 380px;gap:16px;margin-bottom:16px}@media(max-width:900px){.pcb-layout{grid-template-columns:1fr}}.panel-card{background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}.pcb-form{display:flex;flex-direction:column;gap:20px;margin-top:16px}.field-group{display:flex;flex-direction:column;gap:4px}.field-label{font-size:13px;font-weight:600;color:var(--text);display:flex;align-items:center;gap:8px}.unit-badge{display:inline-block;padding:1px 7px;border-radius:4px;background:var(--accent-dim);color:var(--accent);font-size:11px;font-weight:700;font-family:monospace}.pcb-input{padding:9px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg3);color:var(--text);font-size:14px;font-family:Inter,sans-serif;transition:border-color .2s;width:100%}.pcb-input:focus{outline:none;border-color:var(--accent)}.field-hint{font-size:11px;color:var(--muted)}.toggle-group{display:flex;gap:6px;flex-wrap:wrap}.toggle-btn{padding:7px 14px;border-radius:8px;border:1px solid var(--border);background:var(--bg3);color:var(--muted);font-size:12px;font-weight:600;cursor:pointer;transition:all .2s}.toggle-btn.active{background:var(--accent-dim);border-color:var(--accent);color:var(--accent)}.results-col{display:flex;flex-direction:column;gap:14px}.main-result{text-align:center;padding:20px;background:var(--bg3);border-radius:10px;border:1px solid var(--border)}.result-badge{font-size:2.5rem;font-weight:800;color:var(--accent);font-family:JetBrains Mono,monospace;letter-spacing:-.02em}.result-sub{font-size:12px;color:var(--muted);margin-top:4px}.result-list{display:flex;flex-direction:column;gap:6px}.result-row{display:flex;justify-content:space-between;align-items:center;padding:7px 10px;background:var(--bg3);border-radius:6px;border:1px solid var(--border)}.rl-label{font-size:12px;color:var(--muted)}.rl-val{font-size:13px;font-weight:700;color:var(--text);font-family:monospace}.rl-val.accent{color:var(--accent)}.trace-visual{background:var(--bg3);border-radius:10px;border:1px solid var(--border);padding:14px}.trace-label{font-size:11px;color:var(--muted);margin-bottom:10px;text-align:center}.trace-cross{display:flex;flex-direction:column;align-items:center;gap:0}.trace-copper{background:linear-gradient(180deg,#f7c948,#d4a017);border-radius:3px 3px 0 0;transition:all .3s ease;min-width:20px;min-height:8px;border:1px solid #a07010}.trace-substrate{width:100%;height:16px;background:linear-gradient(180deg,#1a3a1a,#0d2010);border-radius:0 0 4px 4px;border:1px solid #2a5a2a;border-top:none}.trace-dims{text-align:center;font-size:11px;color:var(--muted);margin-top:8px}.formula-note{font-size:11px;color:var(--muted);border-top:1px solid var(--border);padding-top:10px;text-align:center;font-family:monospace}.ref-table{width:100%;border-collapse:collapse;font-size:13px;margin-top:14px}.ref-table th{text-align:left;padding:8px 12px;background:var(--bg3);border-bottom:2px solid var(--border);color:var(--muted);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.04em}.ref-table td{padding:7px 12px;border-bottom:1px solid var(--border);font-family:monospace;color:var(--text)}.ref-table tr:hover td{background:var(--bg3)}.ref-table tr.highlight td{color:var(--accent);font-weight:700;background:var(--accent-dim)}