:root {
  --bg: #0f1419; --panel: #171d26; --panel2: #1e2630; --line: #2a3340;
  --text: #e6edf3; --muted: #95a3b3; --accent: #4ea1ff; --accent2: #ffce5c;
  --pv: #ffce5c; --batt: #4ea1ff; --ev: #6ee7a8; --grid: #ff7b72; --load: #c9d4e0;
  --good: #3fb950; --warn: #d29922;
  --radius: 12px; --shadow: 0 1px 3px rgba(0,0,0,.4);
  font-synthesis: none;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 14px; line-height: 1.55; }
a { color: var(--accent); }
h1, h2, h3 { font-weight: 650; line-height: 1.25; }
.wrap { max-width: 1280px; margin: 0 auto; padding: 18px clamp(12px, 3vw, 28px) 60px; }

header.app { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 16px; margin-bottom: 6px; }
header.app h1 { font-size: clamp(18px, 2.4vw, 24px); margin: 0; }
header.app .tag { color: var(--muted); font-size: 12px; }
.lead { color: var(--muted); font-size: 13px; margin: 2px 0 16px; max-width: 80ch; }

.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 14px; }
.toolbar select, .toolbar button { background: var(--panel2); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px; padding: 7px 12px; font-size: 13px; cursor: pointer; }
.toolbar button:hover { border-color: var(--accent); }
.toolbar .spacer { flex: 1; }

.layout { display: grid; grid-template-columns: 340px 1fr; gap: 18px; align-items: start; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

/* --- parameter panel --- */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.params { padding: 6px; position: sticky; top: 12px; max-height: calc(100vh - 24px); overflow-y: auto; }
details.sec { border-bottom: 1px solid var(--line); }
details.sec:last-child { border-bottom: none; }
details.sec > summary { cursor: pointer; padding: 11px 12px; font-weight: 600; font-size: 13px;
  list-style: none; display: flex; align-items: center; gap: 8px; user-select: none; }
details.sec > summary::-webkit-details-marker { display: none; }
details.sec > summary::before { content: "▸"; color: var(--muted); transition: transform .15s; }
details.sec[open] > summary::before { transform: rotate(90deg); }
.sec .body { padding: 4px 12px 12px; }
.field { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 6px 10px; margin: 9px 0; }
.field label { font-size: 12.5px; color: var(--text); }
.field .hint { grid-column: 1 / -1; font-size: 11px; color: var(--muted); margin-top: -4px; }
.field input[type=number] { width: 92px; background: var(--panel2); color: var(--text);
  border: 1px solid var(--line); border-radius: 6px; padding: 5px 7px; font-size: 13px; text-align: right; }
.field .unit { color: var(--muted); font-size: 11px; min-width: 36px; }
.field.range input[type=range] { grid-column: 1 / -1; width: 100%; }
.field select { background: var(--panel2); color: var(--text); border: 1px solid var(--line);
  border-radius: 6px; padding: 5px 7px; font-size: 12.5px; }
.field.check { grid-template-columns: auto 1fr; }
.field.check input { width: 16px; height: 16px; }

/* --- results --- */
.results { display: grid; gap: 16px; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }
.kpi .k { font-size: 11.5px; color: var(--muted); }
.kpi .v { font-size: clamp(18px, 2.4vw, 23px); font-weight: 700; margin-top: 2px; }
.kpi .v small { font-size: 12px; font-weight: 500; color: var(--muted); }
.kpi.good .v { color: var(--good); } .kpi.warn .v { color: var(--warn); }

.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.card h3 { font-size: 13.5px; margin: 0 0 4px; }
.card .sub { font-size: 11.5px; color: var(--muted); margin: 0 0 10px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } }

.legend { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 11.5px; color: var(--muted); margin-top: 8px; }
.legend span { display: inline-flex; align-items: center; gap: 5px; }
.legend i { width: 11px; height: 11px; border-radius: 3px; display: inline-block; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 7px; overflow: hidden; }
.seg button { background: var(--panel2); color: var(--muted); border: none; padding: 5px 10px; font-size: 12px; cursor: pointer; }
.seg button.on { background: var(--accent); color: #04121f; font-weight: 600; }

svg { display: block; width: 100%; height: auto; overflow: visible; }
.axis { stroke: var(--line); stroke-width: 1; }
.axis-label, .tick { fill: var(--muted); font-size: 10px; }
.bar-label { fill: var(--text); font-size: 11px; }

.note { font-size: 11.5px; color: var(--muted); }
.callout { background: var(--panel2); border-left: 3px solid var(--accent); border-radius: 6px; padding: 9px 12px; font-size: 12.5px; }
footer.app { margin-top: 26px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11.5px; }
footer.app a { color: var(--accent); }
.src { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 6px; }

/* --- リアルタイム エネルギーフローシミュレータ --- */
.simctl { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; margin-bottom: 10px; }
.simctl button { background: var(--panel2); color: var(--text); border: 1px solid var(--line); border-radius: 8px; padding: 6px 12px; font-size: 12.5px; cursor: pointer; min-width: 78px; }
.simctl button:hover { border-color: var(--accent); }
.simfield { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; color: var(--muted); }
.simfield input[type=range] { width: 130px; }
.simfield.check { gap: 5px; cursor: pointer; }
.simfield.check input { width: 15px; height: 15px; }
.simfield input:disabled { opacity: .4; }
.simval { color: var(--text); font-size: 12px; min-width: 58px; }
#chartSim { display: block; width: 100%; height: 260px; }