/* NavStudio - styles */
:root {
  --navy: #0f2a43;
  --navy-2: #16405f;
  --blue: #0b6bcb;
  --blue-lt: #e8f1fb;
  --teal: #0f8a86;
  --accent: #e07b2a;
  --ink: #1c2733;
  --muted: #5c6b7a;
  --line: #dfe6ee;
  --bg: #f4f7fb;
  --card: #ffffff;
  --ok: #2f9e68;
  --warn: #c9a227;
  --err: #c0392b;
  --shadow: 0 4px 18px rgba(15,42,67,.10);
  --radius: 10px;
  --font: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", sans-serif, "Noto Sans CJK SC", "PingFang SC", "Malgun Gothic", "Meiryo";
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font); color: var(--ink);
  background: linear-gradient(180deg, #eef3f9 0, var(--bg) 260px);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.app-header { background: linear-gradient(90deg, var(--navy), var(--navy-2) 60%, #1a4a6e); color: #fff; }
.header-inner { display: flex; align-items: center; gap: 14px; padding: 10px 14px; flex-wrap: wrap; }
.brand { display: flex; align-items: baseline; gap: 4px; color:#fff; font-weight: 700; letter-spacing:.2px; }
.brand:hover { text-decoration: none; }
.brand-mark { font-size: 19px; }
.brand-sfx { font-size: 12.5px; color:#9fd0ff; font-weight:600; }
.main-nav { display: flex; gap: 2px; flex-wrap: wrap; }
.main-nav a { color: #cfe4ff; padding: 6px 9px; border-radius: 6px; font-size: 13.5px; font-weight: 500; white-space: nowrap; }
.main-nav a:hover { background: rgba(255,255,255,.08); text-decoration: none; color:#fff; }
.main-nav a.active { background: var(--blue); color:#fff; }
.header-util { margin-left: auto; display: flex; gap: 6px; align-items: center; flex-wrap: nowrap; }
.btn-util {
  display: inline-flex; align-items: center; gap: 5px;
  background: rgba(255,255,255,.10); color:#fff; border:1px solid rgba(255,255,255,.22);
  padding: 5px 9px; border-radius: 7px; font-size: 13px; font-weight:600; cursor:pointer; white-space: nowrap;
}
.btn-util:hover { background: rgba(255,255,255,.20); text-decoration:none; }
.btn-util .ico { font-size: 13px; line-height: 1; }
.btn-mail { background: var(--teal); border-color: transparent; }
.btn-mail:hover { background:#0d7773; }
.lang-select {
  appearance:auto; background:#fff; color:var(--ink); border:1px solid var(--line);
  border-radius:7px; padding:5px 5px; font-size:13px; font-weight:500; cursor:pointer;
  flex:none; max-width:120px;
}
.unit-select {
  appearance:auto; background:rgba(255,255,255,.10); color:inherit; border:1px solid rgba(255,255,255,.30);
  border-radius:7px; padding:5px 5px; font-size:12.5px; font-weight:600; cursor:pointer;
  flex:none; max-width:124px;
}
.unit-select:hover { background:rgba(255,255,255,.20); }
.unit-select option { color:#10213f; }

.app-toolbar { background:#fff; border-bottom:1px solid var(--line); }
.toolbar-actions { display:flex; gap:8px; padding:9px 0; flex-wrap:wrap; }

.btn {
  border-radius: 8px; padding: 10px 18px; font-size: 14.5px; font-weight: 600;
  border: 1px solid var(--line); background:#fff; color:var(--ink); cursor:pointer; transition:.15s;
}
.btn:hover { border-color: var(--blue); color: var(--blue); }
.btn-ghost { background:transparent; border:1px solid var(--line); color:var(--muted); padding:6px 12px; font-size:13px; }
.btn-ghost:hover { border-color:var(--blue); color:var(--blue); }
.btn-primary { background: var(--blue); border-color: var(--blue); color:#fff; }
.btn-primary:hover { background:#0959b4; color:#fff; }
.btn-block { width:100%; }
.btn-accent { background: var(--accent); border-color: var(--accent); color:#fff; }
.btn-accent:hover { background:#cf6d1f; color:#fff; }

/* Layout */
main { padding: 28px 0 40px; }
.page-head { margin-bottom: 22px; }
.page-head h1 { font-size: 27px; margin: 0 0 4px; color: var(--navy); letter-spacing:-.3px; }
.page-head p { margin: 0; color: var(--muted); font-size: 15px; max-width: 780px; }
h2.sec { font-size: 17px; color: var(--navy); border-bottom: 2px solid var(--blue-lt); padding-bottom: 8px; margin: 26px 0 14px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 18px; }
@media (max-width: 860px){ .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 20px 22px;
}
.card h3 { margin: 0 0 14px; font-size: 15px; color: var(--navy); display:flex; align-items:center; gap:8px; }
.card h3 .tag { font-size: 11px; color: var(--muted); font-weight: 600; background: var(--bg); padding: 2px 7px; border-radius: 20px; }

.field { margin-bottom: 13px; }
.field label { display: flex; justify-content: space-between; align-items: baseline; gap: 6px; font-size: 13.5px; color: var(--ink); margin-bottom: 5px; }
.field .sym { color: var(--muted); font-size: 12px; }
.input-row { display: flex; align-items: center; }
.input-row input, input[type=number], input[type=text], select {
  width: 100%; padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px;
  font-size: 14px; font-family: var(--font); background: #fff; color: var(--ink);
}
.input-row input { border-radius: 8px 0 0 8px; border-right: none; }
.input-row .unit-tag {
  background: var(--bg); border: 1px solid var(--line); border-left: none;
  border-radius: 0 8px 8px 0; padding: 9px 11px; font-size: 12.5px; color: var(--muted);
  white-space: nowrap; min-width: 52px; text-align: center;
}
input:focus, select:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(11,107,203,.10); }
.hint { font-size: 12px; color: var(--muted); margin-top: 4px; }

.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg button {
  flex:1; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); background:#fff;
  font-size: 13px; color: var(--ink); cursor: pointer; font-family: var(--font);
}
.seg button.on { background: var(--blue-lt); border-color: var(--blue); color: var(--blue); font-weight:600; }
.seg select { flex: 1; }

.chip { display:inline-flex; align-items:center; gap:6px; background:var(--bg); border:1px solid var(--line); border-radius:20px; padding:4px 10px; font-size:12.5px; color:var(--navy); }
.chip b { color: var(--blue); }

/* Results */
.res-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.res-cell { background: var(--bg); border:1px solid var(--line); border-radius: 9px; padding: 10px 13px; }
.res-cell.strong { background: var(--blue-lt); border-color: var(--blue); }
.res-label { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.res-val { display: flex; align-items: baseline; gap: 6px; }
.res-num { font-size: 20px; font-weight: 700; color: var(--navy); font-variant-numeric: tabular-nums; }
.res-cell.strong .res-num { color: var(--blue); }
.res-unit { font-size: 12px; color: var(--muted); }

.notes { font-size: 12.5px; color: var(--muted); line-height: 1.65; }
.notes li { margin: 3px 0; }

/* table */
.table-scroll { overflow-x: auto; margin-top: 6px; }
table.data { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data th { background: var(--navy); color: #fff; padding: 8px 10px; text-align: left; font-weight: 600; white-space: nowrap; }
table.data td { padding: 6px 10px; border-bottom: 1px solid var(--line); font-variant-numeric: tabular-nums; white-space: nowrap; }
table.data tbody tr:nth-child(even){ background: var(--bg); }
table.data tbody tr:hover { background: var(--blue-lt); }

/* chart */
.chartwrap { position: relative; }
.chartwrap svg { display:block; }
.grid-h, .grid-v { stroke: #dfe6ee; stroke-width: 1; }
.tick { font-size: 10.5px; fill: var(--muted); font-variant-numeric: tabular-nums; }
.axis-label { fill: var(--ink); font-size: 11px; font-weight: 600; }
.y2label { text-anchor: end; }
.chart-legend { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-top: 6px; }
.legend-item { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink); }
.legend-item i { width: 14px; height: 4px; border-radius: 2px; display: inline-block; }
.chart-xlabel { text-align: center; font-size: 12.5px; color: var(--muted); margin-top: 2px; }
/* bar chart (power chain) */
.barchart { display: flex; flex-direction: column; gap: 10px; }
.bar-row { display: grid; grid-template-columns: minmax(150px, 210px) 1fr 92px; align-items: center; gap: 12px; }
.bar-label { font-size: 12.5px; color: var(--ink); text-align: right; line-height: 1.3; }
.bar-track { height: 18px; background: #eef2f7; border-radius: 5px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 5px; transition: width .3s; }
.bar-val { font-size: 12.5px; color: var(--navy); font-variant-numeric: tabular-nums; text-align: left; }

/* home cards */
.hero { background: linear-gradient(120deg, var(--navy), var(--navy-2) 55%, #1c5178); color:#fff; border-radius: 14px; padding: 34px 32px; margin-bottom: 26px; }
.hero .kicker { color:#9fd0ff; font-weight:600; letter-spacing:.6px; font-size:12.5px; text-transform:uppercase; }
.hero h1 { font-size: 30px; margin: 8px 0 8px; line-height:1.2; }
.hero p { color:#d8e7f5; max-width: 760px; font-size: 15.5px; }
.mcard { background:#fff; border:1px solid var(--line); border-radius:12px; padding:20px; box-shadow:var(--shadow); }
.mcard h2 { font-size:17px; margin:0 0 8px; color:var(--navy); }
.mcard p { color:var(--muted); font-size:14px; margin:0 0 14px; min-height: 40px; }
.mcard a { font-weight:600; }
.mcard .mnum { font-size:12px; color:var(--blue); font-weight:700; letter-spacing:.4px; }
.feats { display:grid; grid-template-columns:repeat(auto-fit,minmax(190px,1fr)); gap:12px; margin-top:6px; }
.feat { background:#fff; border:1px solid var(--line); border-radius:10px; padding:14px 16px; font-size:14px; display:flex; gap:10px; align-items:flex-start; }
.feat .fi { color:var(--teal); font-size:18px; line-height:1; }
.feat b { display:block; font-size:13.5px; }

/* hero CTA on page tops */
.cta-band { display:flex; justify-content:center; gap:12px; margin-top:8px; }

/* toast */
.toast {
  position: fixed; bottom: 22px; left: 50%; transform: translate(-50%, 20px);
  background: var(--ink); color: #fff; padding: 12px 20px; border-radius: 10px;
  font-size: 14px; opacity: 0; pointer-events: none; transition: .25s; z-index: 99;
  box-shadow: 0 6px 22px rgba(0,0,0,.25); max-width: 88vw;
}
.toast.show { opacity: 1; transform: translate(-50%,0); }
.toast.error { background: var(--err); }

@media (max-width: 720px) {
  .header-inner { flex-direction: column; align-items: stretch; }
  .header-util { margin-left: 0; flex-wrap: wrap; }
  .hero { padding: 24px 20px; }
}