/* ===== Winding Calculator - global styles ===== */
:root {
  --bg: #eef1f5;
  --panel: #ffffff;
  --border: #c9d1da;
  --border-2: #dde3ea;
  --text: #1f2933;
  --text-2: #52606d;
  --accent: #1a5fb4;
  --accent-2: #2f81d1;
  --accent-soft: #e7f1fb;
  --ok: #2e7d32;
  --warn: #ef6c00;
  --danger: #c62828;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(20,40,60,.08), 0 1px 2px rgba(20,40,60,.06);
  --mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

/* ---- top bar ---- */
.topbar {
  display: flex; align-items: center; gap: 12px;
  background: linear-gradient(180deg, #1b4f91, #153d73);
  color: #fff; padding: 0 18px; min-height: 54px;
  position: sticky; top: 0; z-index: 50;
  box-shadow: 0 2px 6px rgba(0,0,0,.18);
}
.topbar .brand { font-size: 17px; font-weight: 700; letter-spacing: .3px; display:flex; align-items:center; gap:8px; }
.topbar .brand .logo {
  width: 26px; height: 26px; border-radius: 6px;
  background: rgba(255,255,255,.15); display:inline-flex; align-items:center; justify-content:center;
  font-size: 14px;
}
.topbar .spacer { flex: 1; }
.topbar a.topbtn {
  color: #fff; text-decoration: none; font-size: 13px;
  padding: 7px 14px; border-radius: 6px; border: 1px solid rgba(255,255,255,.35);
  display: inline-flex; align-items: center; gap: 6px; transition: background .15s;
}
.topbar a.topbtn:hover { background: rgba(255,255,255,.16); border-color: rgba(255,255,255,.6); }
.topbar a.topbtn svg { width: 15px; height: 15px; }

.lang-select-wrap { display:flex; align-items:center; gap:6px; }
.lang-select-wrap label { font-size: 12px; opacity:.85; }
.lang-select-wrap select {
  background: rgba(255,255,255,.14); color:#fff; border:1px solid rgba(255,255,255,.4);
  border-radius: 6px; padding: 6px 8px; font-size: 13px; cursor:pointer;
  max-width: 110px;
}
.lang-select-wrap select option { color:#222; }

/* ---- layout ---- */
.wrap { max-width: 1500px; margin: 0 auto; padding: 16px; }
.nav-tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.nav-tabs button {
  border: 1px solid var(--border); background: #fff; color: var(--text-2);
  padding: 9px 18px; border-radius: 8px; cursor: pointer; font-size: 14px;
  font-weight: 600; box-shadow: var(--shadow); transition: all .15s;
}
.nav-tabs button:hover { border-color: var(--accent-2); color: var(--accent); }
.nav-tabs button.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.nav-tabs button svg { width: 16px; height: 16px; vertical-align: -2px; margin-right: 6px; opacity:.9; }

.panel {
  background: var(--panel); border: 1px solid var(--border-2); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 16px; margin-bottom: 16px;
}
.panel h2 { margin: 0 0 4px; font-size: 16px; }
.panel .hint { color: var(--text-2); font-size: 12px; margin: 0 0 12px; }
.panel-title { font-size: 15px; font-weight: 700; margin: 0 0 12px; display:flex; align-items:center; gap:8px; }

.split { display: grid; grid-template-columns: 360px 1fr; gap: 16px; align-items: start; }
.split.narrow { grid-template-columns: 300px 1fr; }
@media (max-width: 980px) { .split { grid-template-columns: 1fr; } }

.inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 12px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 12px; color: var(--text-2); font-weight: 600; }
.field input, .field select {
  border: 1px solid var(--border); border-radius: 6px; padding: 7px 9px; font-size: 13px;
  width: 100%; background: #fff; color: var(--text);
}
.field input:focus, .field select:focus { outline: none; border-color: var(--accent-2); box-shadow: 0 0 0 2px rgba(47,129,209,.15); }
.field.full { grid-column: 1 / -1; }

.radio-group { display: flex; gap: 6px; flex-wrap: wrap; }
.radio-group label {
  display: inline-flex; align-items: center; gap: 5px; border: 1px solid var(--border);
  border-radius: 6px; padding: 5px 10px; cursor: pointer; font-size: 12.5px; color: var(--text);
  line-height: 1.2;
}
.radio-group label.active { border-color: var(--accent-2); background: var(--accent-soft); }
.radio-group input { margin: 0; }

.buttons { margin-top: 14px; display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  border: 1px solid var(--border); background: #fff; color: var(--text);
  padding: 9px 16px; border-radius: 7px; cursor: pointer; font-size: 14px; font-weight: 600;
  transition: all .15s;
}
.btn:hover { border-color: var(--accent-2); }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.primary:hover { background: var(--accent-2); }
.btn.mono { font-family: var(--mono); }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn.danger { border-color: var(--danger); color: var(--danger); }
.btn.danger:hover { background: var(--danger); color: #fff; }
.btn-row { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.tbl-scroll { overflow-x: auto; }
.tbl.compare th:first-child, .tbl.compare .cmp-label { text-align: left; color: var(--text-2); font-weight: 600; white-space: nowrap; }
.tbl.compare th { background: var(--accent-soft); }

/* table */
.tbl { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.tbl th, .tbl td { border: 1px solid var(--border-2); padding: 5px 8px; text-align: right; }
.tbl thead th { background: #f4f7fa; color: var(--text-2); font-weight: 700; position: sticky; top: 0; }
.tbl.editable td { cursor: text; }
.tbl .num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.tbl-wrap { max-height: 420px; overflow: auto; border: 1px solid var(--border-2); border-radius: 6px; }
.tbl.small thead th:first-child { text-align: left; }

/* charts / svg */
.chart-host { width: 100%; }
.chart-host svg { width: 100%; height: auto; display: block; }
.subtabs { display: flex; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.subtabs button {
  border: 1px solid var(--border); background: #f7f9fb; color: var(--text-2);
  padding: 6px 13px; border-radius: 6px; cursor: pointer; font-size: 13px; font-weight: 600;
}
.subtabs button.active { background: var(--accent-soft); color: var(--accent); border-color: var(--accent-2); }

/* wizard matrix */
.pole-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.pole-btn {
  border: 1px solid var(--border); background: #fff; border-radius: 6px; padding: 6px 12px;
  cursor: pointer; font-size: 13px; font-weight: 600; color: var(--text-2);
}
.pole-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.spin { display:inline-flex; align-items:center; border:1px solid var(--border); border-radius:6px; overflow:hidden; }
.spin button { border:none; background:#f4f7fa; width:26px; height:28px; cursor:pointer; font-size:15px; font-weight:700; }
.spin button:hover { background:#e3eaf2; }
.spin b { min-width: 44px; text-align: center; font-size: 13px; font-family: var(--mono); }

.legend { display: flex; gap: 14px; flex-wrap: wrap; margin: 10px 0; font-size: 12px; align-items: center; }
.legend .it { display: inline-flex; align-items: center; gap: 6px; }
.swatch { width: 14px; height: 14px; border-radius: 3px; border: 1px solid rgba(0,0,0,.2); display:inline-block; }
.wz-grid { display: grid; gap: 2px; }
.wz-grid .hz { display: flex; margin-bottom: 6px; font-weight: 700; font-size: 12px; color: var(--text-2); }
.wz-cell {
  display: flex; align-items: center; justify-content: center; height: 30px;
  border-radius: 3px; font-family: var(--mono); font-size: 12px; color: #0b1220; cursor: default;
}
.wz-legend-lbl { font-size: 12px; color: var(--text-2); margin-bottom: 6px; }

.badge { display:inline-block; padding:2px 8px; border-radius: 10px; font-size:11px; font-weight:700; }
.badge.ok { background:#e3f2e6; color:#1b5e20; }
.badge.info { background: var(--accent-soft); color: var(--accent); }
.badge.warn { background:#fff3e0; color:#e65100; }

.result-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(160px,1fr)); gap:12px; margin-bottom:6px; }
.stat { background:#f7f9fb; border:1px solid var(--border-2); border-radius:8px; padding:10px 12px; }
.stat .k { font-size:11px; color:var(--text-2); }
.stat .v { font-size:20px; font-weight:700; color:var(--accent); font-family:var(--mono); }
.inline-inputs { display:grid; grid-template-columns:repeat(auto-fit, minmax(150px,1fr)); gap:12px; }
.sat-flag { display:flex; align-items:center; gap:8px; font-weight:700; color:var(--accent); font-size:15px; }
.sat-flag .dot { width:10px; height:10px; border-radius:50%; background:var(--accent); }
.sat-flag .dot.warn { background:#e53e3e; }
.sat-flag .note { margin-left:auto; font-size:12px; font-weight:600; color:var(--text-2); }
.sweep-ov { display:flex; flex-wrap:wrap; gap:10px; padding-top:6px; }
.sweep-ov .swl { display:inline-flex; align-items:center; gap:5px; font-size:12px; color:var(--text-2); cursor:pointer; }
.sweep-ov .swch { width:10px; height:10px; border-radius:50%; display:inline-block; }

.footer { text-align:center; color:var(--text-2); font-size:12px; padding:20px 0 30px; }
.footer a { color: var(--accent); text-decoration:none; }

.hidden { display: none !important; }
.mt { margin-top: 12px; }
.mono { font-family: var(--mono); }