:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --ink: #1f2a37;
  --muted: #5b6b7b;
  --line: #dce3ec;
  --accent: #1f6feb;
  --accent-2: #0b8a5a;
  --warn: #b54708;
  --shadow: 0 1px 3px rgba(16, 24, 40, .08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "Noto Sans", "Microsoft YaHei", "Malgun Gothic", "Hiragino Sans", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 18px;
  background: #0f172a;
  color: #fff;
  box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 8px; font-size: 16px; }
.logo { font-size: 18px; }
.top-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 7px 14px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  background: var(--accent);
  color: #fff;
  transition: filter .15s ease;
}
.btn:hover { filter: brightness(1.08); }
.btn-home { background: #1f6feb; }
.btn-mail { background: #0b8a5a; }
.lang-select { display: flex; align-items: center; gap: 6px; font-size: 13px; color: #cbd5e1; }
.lang-select select {
  padding: 6px 8px; border-radius: 8px; border: 1px solid #334155;
  background: #1e293b; color: #fff; font-size: 13px;
}

.tagline {
  margin: 12px 18px 0;
  color: var(--muted);
  font-size: 14px;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 18px 0;
}
.tab {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  padding: 9px 16px;
  border-radius: 10px 10px 0 0;
  cursor: pointer;
  font-size: 14px;
}
.tab.active { color: var(--ink); border-bottom-color: var(--panel); font-weight: 600; box-shadow: var(--shadow); }

main { padding: 0 18px 24px; }
.panel {
  display: none;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0 12px 12px 12px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.panel.active { display: block; }
.panel h2 { margin: 0 0 14px; font-size: 18px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px 16px;
}
.grid label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.grid input, .grid select {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink);
  background: #fff;
}
.grid input[readonly] { background: #eef2f7; color: var(--muted); }

.results {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 8px 16px;
  font-size: 14px;
}
.results b { color: var(--accent); font-size: 15px; }

.tip {
  margin: 12px 0 0;
  padding: 8px 12px;
  background: #fff7ed;
  border-left: 3px solid var(--warn);
  border-radius: 6px;
  font-size: 13px;
  color: #7c2d12;
}

.table-wrap { overflow-x: auto; margin-top: 12px; }
.mat-table { border-collapse: collapse; width: 100%; font-size: 13px; }
.mat-table th, .mat-table td { border: 1px solid var(--line); padding: 8px 10px; text-align: right; }
.mat-table th { background: #f1f5f9; color: var(--muted); }
.mat-table tbody tr { cursor: pointer; }
.mat-table tbody tr:hover { background: #eef6ff; }

.report-actions { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.report-out {
  background: #0f172a; color: #d1e7ff; padding: 14px 16px; border-radius: 10px;
  white-space: pre-wrap; word-break: break-word; font-size: 13px; min-height: 120px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.disclaimer {
  margin: 18px;
  padding: 12px 14px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 10px;
  color: #78350f;
  font-size: 12.5px;
}

@media (max-width: 560px) {
  .topbar { flex-direction: column; align-items: flex-start; }
  .brand { font-size: 14px; }
}

/* sub-nav (module links under the top bar) */
.subnav { display: flex; flex-wrap: wrap; gap: 4px; padding: 8px 18px 0; }
.subnav a {
  padding: 7px 14px; border-radius: 8px; background: var(--panel);
  border: 1px solid var(--line); color: var(--muted);
  text-decoration: none; font-size: 13px;
}
.subnav a:hover { color: var(--ink); }
.subnav a.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* home cards */
.home { padding: 18px; }
.home h1 { font-size: 22px; margin: 4px 0 6px; }
.cards {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px; margin-top: 14px;
}
.card {
  display: flex; flex-direction: column; gap: 8px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px; text-decoration: none; color: var(--ink);
  box-shadow: var(--shadow); transition: transform .12s ease, border-color .12s ease;
}
.card:hover { transform: translateY(-2px); border-color: var(--accent); }
.card h3 { margin: 0; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 13px; }
.card-go { margin-top: auto; color: var(--accent); font-weight: 600; font-size: 13px; }

/* misc */
.btn-use { background: var(--accent-2); }
.warn {
  margin: 12px 0 0; padding: 8px 12px; background: #fef2f2;
  border-left: 3px solid #dc2626; border-radius: 6px;
  font-size: 13px; color: #7f1d1d;
}

/* engagement status (neck) */
.results b.ok { color: #0b8a5a; }
.results b.warn { color: #b54708; }
.results b.fail { color: #dc2626; }
.results b.na { color: var(--muted); }

/* anisotropy -> cooling / warping guidance box */
.warp {
  margin-top: 12px; padding: 10px 12px; border-radius: 6px;
  border: 1px solid #ccc; background: #f7f7f7; font-size: 13px; color: var(--muted);
  line-height: 1.5;
}
.warp.low { border-color: #7bbf6a; background: #eef7ec; color: #2f5d27; }
.warp.mod { border-color: #e0b341; background: #fbf4e2; color: #7a5b10; }
.warp.high { border-color: #d9534f; background: #fbecec; color: #8a2b27; }

/* cooling layout diagram (end section) */
.cool-layout {
  width: 100%; max-width: 320px; height: auto; margin: 12px 0;
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
}

/* conformal cooling-hole coordinate table */
.cool-table {
  width: 100%; max-width: 360px; border-collapse: collapse; margin: 8px 0;
  font-size: 12px; background: #fff;
}
.cool-table th, .cool-table td {
  border: 1px solid var(--line); padding: 3px 7px; text-align: right;
}
.cool-table th { background: #f1f5f9; font-weight: 600; }
.cool-table td:first-child, .cool-table th:first-child { text-align: center; width: 2.2em; }
.cool-table tbody tr:nth-child(even) { background: #f8fafc; }

/* cavity cross-section shape selector (cooling profile) */
.profile-box { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: flex-end; margin: 8px 0 2px; }
.profile-box > label { display: flex; flex-direction: column; font-size: 13px; gap: 3px; }
.profile-box select { padding: 5px 8px; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
.prof-fields { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.prof-fields label { display: flex; flex-direction: column; font-size: 13px; gap: 3px; }
.prof-fields input { width: 84px; padding: 5px 8px; border: 1px solid var(--line); border-radius: 7px; }

/* report page actions */
.actions { display: flex; gap: 8px; margin: 16px 0 12px; flex-wrap: wrap; }
.actions .btn { background: var(--accent-2); }

/* bilingual report comparison */
.lang2-row { margin: 10px 0 6px; }
.lang2-row .lang-select { color: var(--muted); font-size: 13px; }
.lang2-row select {
  padding: 6px 8px; border-radius: 8px; border: 1px solid var(--line);
  background: #fff; color: var(--ink); font-size: 13px;
}
.bilingual-wrap { overflow-x: auto; margin-top: 8px; }
table.bilingual { border-collapse: collapse; width: 100%; font-size: 13px; }
table.bilingual th, table.bilingual td {
  border: 1px solid var(--line); padding: 7px 10px; text-align: left; vertical-align: top;
}
table.bilingual thead th { background: #f1f5f9; color: var(--muted); }
table.bilingual th.bk, table.bilingual td.bk { color: var(--muted); font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; white-space: nowrap; }
table.bilingual tr.bsec td { background: #eef6ff; font-weight: 600; color: var(--ink); }

/* print: clean report sheet (hide chrome, neutral colors) */
@media print {
  .topbar, .subnav, .lang-select, .actions { display: none !important; }
  body { background: #fff; color: #000; }
  main { padding: 0; }
  .panel { display: block !important; border: none; box-shadow: none; padding: 0; border-radius: 0; }
  .panel h2 { font-size: 20px; }
  .results b { color: #000; }
  .tip, .warn { background: #fff; color: #000; border-left: 2px solid #999; }
  .report-out {
    background: #fff; color: #000; border: 1px solid #999; border-radius: 0;
    font-size: 12px; min-height: 0;
  }
  .disclaimer {
    background: #fff; color: #000; border: 1px solid #999; border-radius: 0;
    font-size: 11px; page-break-inside: avoid;
  }
}