/* ============================================================
   Stirrer Design & Calculation Tool — shared stylesheet
   Windows standard software style: menu bar + group boxes
   ============================================================ */
:root {
  --win-bg: #ece9d8;
  --win-panel: #ffffff;
  --win-border: #7f9db9;
  --win-dark: #0f3460;
  --win-blue: #1e5fa8;
  --win-blue-hi: #2f7fd1;
  --win-text: #1a1a1a;
  --win-muted: #555555;
  --win-group: #f5f7fa;
  --win-header: linear-gradient(180deg, #fdfdfd, #e8f1f9);
  --win-ok: #1d7a1d;
  --win-bad: #b00020;
  --win-warn: #9a6b00;
  --mono: Consolas, "Courier New", monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "Microsoft YaHei", "Noto Sans", Arial, sans-serif;
  background: var(--win-bg);
  color: var(--win-text);
  font-size: 14px;
  line-height: 1.5;
}

/* ---------- top bar ---------- */
#topbar {
  background: linear-gradient(180deg, #2b579a 0%, #1e4e8c 55%, #173f73 100%);
  color: #fff;
  display: flex;
  align-items: center;
  padding: 6px 14px;
  gap: 10px;
  flex-wrap: wrap;
}
#topbar .app-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .3px;
  margin-right: auto;
}
#topbar .tb-group { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
#topbar .btn-top {
  color: #fff;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,.55);
  border-radius: 3px;
  padding: 3px 12px;
  font-size: 12.5px;
  line-height: 1.3;
  background: rgba(255,255,255,.12);
  transition: background .15s;
  font-family: inherit;
  display: inline-block;
  vertical-align: middle;
  overflow: hidden;
  white-space: nowrap;
}
#topbar .btn-top:hover { background: rgba(255,255,255,.28); }
#topbar button.btn-top {
  -webkit-appearance: none;
  appearance: none;
  margin: 0;
  text-align: center;
}
#topbar select {
  font-size: 12.5px;
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid #8aa4c4;
  background: #fff;
  color: #1a1a1a;
}

/* ---------- menu bar ---------- */
#menubar {
  background: var(--win-header);
  border-bottom: 1px solid var(--win-border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  padding: 3px 8px;
  gap: 2px;
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
}
#menubar .menu-item {
  display: inline-block;
  padding: 5px 14px;
  font-size: 13px;
  color: #222;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 3px;
}
#menubar .menu-item:hover { background: #dcebf7; border-color: #b8d4ee; }
#menubar .menu-item.active {
  background: #cfe3f7;
  border-color: var(--win-blue);
  color: var(--win-dark);
  font-weight: 600;
}
#menubar .menu-sep {
  width: 1px; height: 20px;
  background: #c4cdd8;
  margin: 0 6px;
}
#menubar .menu-group { display: flex; align-items: center; gap: 2px; flex-wrap: wrap; }
.menu-drop { position: relative; display: inline-block; }
.menu-drop-items {
  display: none; position: absolute; top: 100%; left: 0;
  background: #fff; border: 1px solid var(--win-border);
  border-radius: 3px; box-shadow: 0 4px 12px rgba(0,0,0,.16);
  z-index: 60; min-width: 210px; padding: 4px;
}
.menu-drop-items .menu-item { display: block; width: 100%; box-sizing: border-box; }
.menu-drop:hover .menu-drop-items, .menu-drop:focus-within .menu-drop-items { display: block; }
.menu-drop:hover > a.menu-item { background: #dcebf7; border-color: #b8d4ee; }

/* ---------- layout ---------- */
.page-wrap { max-width: 1180px; margin: 16px auto 40px; padding: 0 16px; }
.page-title {
  font-size: 19px;
  font-weight: 600;
  color: var(--win-dark);
  margin: 6px 0 14px;
  padding-left: 10px;
  border-left: 5px solid var(--win-blue);
}
.page-desc { color: var(--win-muted); margin: -8px 0 16px 15px; font-size: 13px; }

/* ---------- group box (Windows style) ---------- */
.group {
  border: 1px solid var(--win-border);
  border-radius: 4px;
  background: var(--win-panel);
  margin: 0 0 18px;
  box-shadow: 0 1px 2px rgba(0,0,0,.06);
  overflow: hidden;
}
.group > .group-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--win-dark);
  padding: 8px 14px;
  background: var(--win-header);
  border-bottom: 1px solid #cfdaea;
}
.group > .group-body { padding: 14px 16px; }

/* ---------- grid / form ---------- */
.cols2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
@media (max-width: 900px) { .cols2 { grid-template-columns: 1fr; } }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 10px 22px; }
.field { display: flex; flex-direction: column; gap: 3px; }
.field label { font-size: 12.5px; color: #333; font-weight: 600; }
.field label .sym { font-style: italic; font-family: var(--mono); color: var(--win-blue); }
.field input[type=number], .field input[type=text], .field select {
  font-family: var(--mono);
  font-size: 13.5px;
  padding: 5px 8px;
  border: 1px solid #9db2c8;
  border-radius: 3px;
  background: #fff;
  color: #111;
  width: 100%;
}
.field input:focus, .field select:focus { outline: 2px solid #8ec0ee; border-color: var(--win-blue); }
.field .unit { font-size: 12px; color: var(--win-muted); }
.field.hint label::after { content: " ?"; color: var(--win-warn); cursor: help; }
.field.hint label { text-decoration: dotted underline 1px; text-underline-offset: 3px; }

/* ---------- buttons ---------- */
.actions { display: flex; gap: 10px; margin: 14px 0 4px; flex-wrap: wrap; }
button.btn {
  font-size: 13.5px;
  padding: 6px 22px;
  border: 1px solid #7a9cc5;
  border-radius: 3px;
  background: linear-gradient(180deg, #fdfdfd, #e6eef7);
  color: #1a1a1a;
  cursor: pointer;
}
button.btn:hover { background: linear-gradient(180deg, #f0f7ff, #d8e9f9); border-color: var(--win-blue); }
button.btn.primary {
  background: linear-gradient(180deg, #3f87d8, #2364b0);
  color: #fff;
  border-color: #1d5aa0;
  font-weight: 600;
}
button.btn.primary:hover { background: linear-gradient(180deg, #4f97e4, #2b6fc0); }

/* ---------- results ---------- */
.results { margin-top: 10px; }
table.out {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
table.out th, table.out td {
  border: 1px solid #c3cedb;
  padding: 6px 10px;
  text-align: left;
}
table.out th {
  background: var(--win-header);
  font-weight: 600;
  color: var(--win-dark);
}
table.out td.num { font-family: var(--mono); text-align: right; }
table.out tr:nth-child(even) td { background: #f7f9fc; }
table.out td.kpi {
  background: #eaf2ff !important;
  font-weight: 700;
  color: var(--win-dark);
}
.result-banner {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: 4px;
  font-size: 14.5px;
  font-weight: 600;
  border: 1px solid;
}
.result-banner.ok { background: #e8f5e9; color: var(--win-ok); border-color: #9ed0a4; }
.result-banner.bad { background: #fdecec; color: var(--win-bad); border-color: #e5b3b3; }
.result-banner.warn { background: #fff8e1; color: var(--win-warn); border-color: #e6cf8a; }

/* ---------- notes / formula ---------- */
.formula {
  font-family: var(--mono);
  font-size: 12.8px;
  background: #f3f6fa;
  border: 1px dashed #b7c6d8;
  border-radius: 3px;
  padding: 8px 12px;
  margin: 8px 0;
  color: #24405e;
  overflow-x: auto;
}
.note { font-size: 12.5px; color: var(--win-muted); margin: 6px 0; }
.ref-list { font-size: 12.5px; color: #444; }
.ref-list li { margin: 3px 0; }

/* ---------- tables (data lookup) ---------- */
.data-table-wrap { overflow-x: auto; max-height: 520px; overflow-y: auto; }
table.data {
  border-collapse: collapse;
  font-size: 13px;
  width: 100%;
}
table.data th, table.data td { border: 1px solid #cfd8e3; padding: 5px 9px; text-align: left; white-space: nowrap; }
table.data th { position: sticky; top: 0; background: #eaf1f9; color: var(--win-dark); z-index: 2; }
table.data tr:nth-child(even) td { background: #f7f9fc; }
table.data td.num { font-family: var(--mono); text-align: right; }
table.data tr:hover td { background: #eef6ff; }
.search-row { display: flex; gap: 10px; margin-bottom: 10px; align-items: center; flex-wrap: wrap; }
.search-row input, .search-row select {
  font-size: 13px; padding: 5px 9px; border: 1px solid #9db2c8; border-radius: 3px;
}

/* ---------- tabs ---------- */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--win-border); margin-bottom: 14px; flex-wrap: wrap; }
.tab-btn {
  padding: 7px 18px;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  background: transparent;
  font-size: 13.5px;
  cursor: pointer;
  color: #333;
}
.tab-btn.active {
  background: #fff;
  border-color: var(--win-border);
  color: var(--win-dark);
  font-weight: 600;
  position: relative;
  top: 1px;
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- status chips ---------- */
.chip { display: inline-block; padding: 2px 10px; border-radius: 10px; font-size: 12px; font-weight: 600; }
.chip.ok { background: #e3f3e3; color: var(--win-ok); }
.chip.bad { background: #fbe3e3; color: var(--win-bad); }
.chip.warn { background: #fdf3d9; color: var(--win-warn); }

/* ---------- home page ---------- */
.hero {
  background: linear-gradient(135deg, #1e4e8c 0%, #2f7fd1 100%);
  color: #fff;
  border-radius: 6px;
  padding: 26px 30px;
  margin-bottom: 20px;
}
.hero h1 { margin: 0 0 8px; font-size: 24px; }
.hero p { margin: 0; opacity: .92; font-size: 14px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.card {
  background: #fff;
  border: 1px solid var(--win-border);
  border-radius: 5px;
  padding: 16px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow .15s, transform .1s;
}
.card:hover { box-shadow: 0 3px 10px rgba(15,52,96,.18); transform: translateY(-1px); }
.card .card-title { font-weight: 700; font-size: 15px; color: var(--win-dark); margin-bottom: 6px; }
.card .card-desc { font-size: 12.5px; color: var(--win-muted); }
.card .card-tag {
  display: inline-block;
  margin-top: 8px;
  font-size: 11.5px;
  color: var(--win-blue);
  background: #eaf2ff;
  border-radius: 3px;
  padding: 2px 8px;
}
.feature-list { margin: 10px 0 0; padding-left: 18px; }
.feature-list li { margin: 4px 0; font-size: 13px; }

/* ---------- footer ---------- */
.footer {
  text-align: center;
  color: var(--win-muted);
  font-size: 12px;
  padding: 18px 0 26px;
}

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  #topbar { justify-content: space-between; }
}
@media print {
  #topbar, #menubar, .actions, .footer { display: none !important; }
  body { background: #fff; }
}