/* Power & Solar Calculator – Frontend */
.psc-card{--bg:#fff;--fg:#0f172a;--mut:#64748b;--brand:#2563eb;--bord:#e2e8f0;--soft:#f8fafc;
  background:var(--bg);color:var(--fg);border:1px solid var(--bord);border-radius:14px;padding:22px;
  box-shadow:0 4px 20px rgba(15,23,42,.06);max-width:640px;margin:18px auto;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
.psc-card.psc-theme-dark{--bg:#0f172a;--fg:#f1f5f9;--mut:#94a3b8;--bord:#1e293b;--soft:#1e293b}
.psc-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.psc-head h3{margin:0;font-size:18px}
.psc-theme-toggle{background:transparent;border:1px solid var(--bord);border-radius:8px;padding:4px 10px;cursor:pointer;color:var(--fg)}
.psc-form{display:grid;gap:10px}
.psc-form label{display:flex;flex-direction:column;font-size:12px;color:var(--mut);gap:4px}
.psc-form input,.psc-form select{padding:9px 11px;border:1px solid var(--bord);border-radius:8px;background:var(--bg);color:var(--fg);font:inherit}
.psc-form input:focus,.psc-form select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.psc-btn{background:var(--brand);color:#fff;border:0;padding:10px 18px;border-radius:8px;font-weight:600;cursor:pointer;margin-top:6px}
.psc-btn:hover{filter:brightness(1.07)}
.psc-result{margin-top:14px;background:var(--soft);border-radius:10px;padding:12px;font-size:14px;display:none}
.psc-result.show{display:block}
.psc-result table{width:100%;border-collapse:collapse}
.psc-result td{padding:6px 4px;border-bottom:1px solid var(--bord)}
.psc-result td:first-child{color:var(--mut)}
.psc-result td:last-child{text-align:right;font-weight:600}
.psc-chart{margin-top:14px;max-width:100%}
.psc-ai-box{margin-top:14px;background:linear-gradient(135deg,#eef2ff,#fdf4ff);border-radius:10px;padding:12px;color:#0f172a;font-size:13px;line-height:1.5}
.psc-disabled{padding:16px;background:#fff7ed;color:#9a3412;border:1px dashed #fdba74;border-radius:10px;text-align:center}
.psc-err{color:#b91c1c;margin-top:8px}
@media(max-width:520px){.psc-card{padding:16px;margin:10px}}