/* EngTool GeoSim Web - global styles (light engineering theme) */
:root {
  --bg: #eef1f5;
  --panel: #ffffff;
  --panel2: #f6f8fa;
  --border: #d7dde5;
  --text: #24303c;
  --text2: #5b6b7a;
  --text3: #8a98a6;
  --accent: #1a6fb0;
  --accent2: #0e5a93;
  --danger: #c0392b;
  --ok: #1e8e5a;
  --topbar: #1d2b3a;
  --topbar2: #16222e;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(20, 40, 60, .10);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0 0 8px; font-weight: 600; }
h2 { font-size: 20px; }
h3 { font-size: 15px; color: var(--text2); }
input[type=number], input[type=text], input[type=range], select, button {
  font: inherit; color: inherit;
}
input[type=number], input[type=text], select {
  width: 100%; padding: 5px 8px;
  border: 1px solid var(--border); border-radius: 6px;
  background: #fff; color: var(--text);
}
input[type=number]:focus, input[type=text]:focus, select:focus {
  outline: 2px solid rgba(26,111,176,.35); border-color: var(--accent);
}
input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--accent); }
input[type=range] { width: 100%; accent-color: var(--accent); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 7px 14px; border: 1px solid transparent; border-radius: 7px;
  background: var(--accent); color: #fff; cursor: pointer; font-weight: 600;
  transition: background .15s, opacity .15s;
  white-space: nowrap;
}
.btn:hover { background: var(--accent2); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-sm { padding: 3px 8px; font-size: 12px; }
.btn-ghost { background: transparent; color: var(--accent); border-color: var(--border); }
.btn-ghost:hover { background: #eef4fa; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #a93226; }
.btn-block { width: 100%; }

/* ---------------- topbar ---------------- */
#topbar { background: var(--topbar); color: #dfe7ef; }
.tb-inner {
  max-width: 1400px; margin: 0 auto; padding: 0 16px;
  display: flex; align-items: center; gap: 18px; height: 54px;
}
.brand { display: flex; align-items: center; gap: 8px; color: #fff !important; font-size: 16px; font-weight: 700; text-decoration: none !important; }
.brand-ico { font-size: 20px; }
.brand-txt b { color: #5db2ff; font-weight: 800; }
.tb-nav { display: flex; gap: 4px; flex: 1; }
.tb-nav a {
  color: #b9c6d2; padding: 6px 12px; border-radius: 6px; font-weight: 500;
  text-decoration: none !important;
}
.tb-nav a:hover { color: #fff; background: rgba(255,255,255,.08); }
.tb-nav a.active { color: #fff; background: rgba(91,178,255,.22); }
.tb-actions { display: flex; align-items: center; gap: 8px; }
.tb-actions select { width: auto; padding: 4px 6px; background: var(--topbar2); color: #dfe7ef; border-color: #3a4c5e; }
.btn-home, .btn-mail {
  padding: 6px 12px; font-size: 13px; border-radius: 6px; text-decoration: none !important;
}
.btn-home { background: rgba(255,255,255,.1); color: #fff; }
.btn-home:hover { background: rgba(255,255,255,.2); }
.btn-mail { background: #2e6da4; color: #fff; }
.btn-mail:hover { background: #3c7fb8; }

/* ---------------- footer ---------------- */
#footer { background: var(--topbar2); color: #9fb0bf; margin-top: auto; }
.ft-inner { max-width: 1400px; margin: 0 auto; padding: 18px 16px; text-align: center; }
.ft-tagline { margin: 0 0 8px; font-size: 12.5px; max-width: 760px; margin-left: auto; margin-right: auto; }
.ft-meta { margin: 0; font-size: 12px; color: #7f92a3; }
.ft-meta a { color: #9fb0bf; }

/* ---------------- page hero / sections (index, examples, docs) ---------------- */
.page { max-width: 1100px; margin: 0 auto; padding: 28px 20px 60px; width: 100%; }
.hero { background: linear-gradient(135deg, #16324a 0%, #1d4d74 60%, #1a6fb0 100%); color: #fff; border-radius: 14px; padding: 42px 38px; margin-bottom: 30px; }
.hero .badge { display: inline-block; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.25); border-radius: 999px; padding: 3px 12px; font-size: 12.5px; margin-bottom: 14px; }
.hero h1 { font-size: 30px; line-height: 1.25; margin-bottom: 12px; }
.hero p { color: #d5e4f2; max-width: 720px; font-size: 15px; }
.hero .cta-row { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero .btn { font-size: 15px; padding: 10px 22px; }
.hero .btn-primary { background: #ffb84d; color: #16222e; }
.hero .btn-primary:hover { background: #ffc96e; }
.hero .btn-outline { background: transparent; border: 1px solid rgba(255,255,255,.5); color: #fff; }
.hero .btn-outline:hover { background: rgba(255,255,255,.12); }

.section { margin: 26px 0; }
.section h2 { font-size: 21px; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 6px; color: var(--text); font-size: 15.5px; }
.card h3 .ico { margin-right: 6px; }
.card p { margin: 0; color: var(--text2); font-size: 13.5px; }
.card .tag { display: inline-block; font-size: 11.5px; color: var(--accent); background: #e8f1f9; padding: 2px 8px; border-radius: 999px; margin-top: 10px; }

.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; }
.step { display: flex; gap: 12px; }
.step .n { flex: none; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; }
.step b { display: block; margin-bottom: 2px; }
.step p { margin: 0; color: var(--text2); font-size: 13px; }

/* ---------------- app layout ---------------- */
.app-wrap { display: flex; flex: 1; min-height: 0; }
.app-side {
  width: 300px; flex: none; background: var(--panel); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
.app-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.app-viewport { flex: 1; position: relative; min-height: 0; }
.app-viewport canvas { display: block; }
.app-right {
  width: 300px; flex: none; background: var(--panel); border-left: 1px solid var(--border);
  display: flex; flex-direction: column; overflow-y: auto;
}

/* tabs */
.tabs { display: flex; border-bottom: 1px solid var(--border); background: var(--panel2); }
.tabs button {
  flex: 1; padding: 10px 4px; background: none; border: none; cursor: pointer;
  font-weight: 600; color: var(--text2); border-bottom: 3px solid transparent;
}
.tabs button.active { color: var(--accent); border-bottom-color: var(--accent); background: #fff; }
.tab-panel { display: none; padding: 14px; overflow-y: auto; flex: 1; }
.tab-panel.active { display: block; }

.panel-body { display: flex; flex-direction: column; gap: 12px; }
.panel-section { border: 1px solid var(--border); border-radius: 8px; padding: 12px; background: var(--panel2); }
.panel-section h4 { margin: 0 0 10px; font-size: 13px; color: var(--accent); text-transform: uppercase; letter-spacing: .4px; }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 8px; }
.f-row .full { grid-column: 1 / -1; }
.f-row label { font-size: 12px; color: var(--text2); display: block; margin-bottom: 2px; }
.f-row label .u { color: var(--text3); }
.model-f { display: none; }

/* material table */
.mat-scroll { overflow-x: auto; }
#matTable { width: 100%; border-collapse: collapse; font-size: 12.5px; }
#matTable th { text-align: left; padding: 4px 6px; color: var(--text3); font-weight: 600; border-bottom: 1px solid var(--border); white-space: nowrap; }
#matTable td { padding: 3px 4px; border-bottom: 1px solid #eef1f5; white-space: nowrap; }
#matTable input { padding: 3px 5px; min-width: 74px; }
#matTable input[data-ms] { min-width: 84px; }

/* checkbox rows */
.chk-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; font-size: 13px; }

/* structure element list */
.struct-item {
  display: flex; align-items: center; gap: 8px;
  border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 8px; margin-bottom: 6px; font-size: 12.5px; background: #fff;
}

/* status bar */
.app-status {
  display: flex; align-items: center; gap: 12px; padding: 6px 12px;
  background: var(--panel); border-top: 1px solid var(--border); font-size: 12.5px;
  flex-wrap: wrap;
}
.app-status .sp { color: var(--text2); display: inline-flex; gap: 5px; align-items: center; }
.app-status .sp b { color: var(--text); font-weight: 600; }
#statusText { color: var(--text2); flex: 1; min-width: 200px; }
progress, #solveBar { flex: 1; min-width: 140px; height: 8px; accent-color: var(--accent); }

/* results */
.field-row { margin-bottom: 10px; }
.field-row label { display: block; font-size: 12px; color: var(--text2); margin-bottom: 3px; }
.slice-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; font-size: 12.5px; }
.slice-row input[type=range] { flex: 1; }
.slice-row span { color: var(--text3); font-size: 11px; min-width: 34px; text-align: right; }

.legend-box { display: flex; gap: 6px; align-items: center; }
.legend-box canvas { border: 1px solid var(--border); border-radius: 3px; }
.legend-mm { font-size: 10.5px; color: var(--text2); line-height: 2.2; }
.legend-title { font-size: 12px; color: var(--text2); margin-bottom: 4px; }

#histChart { width: 100%; height: 150px; background: #fff; border: 1px solid var(--border); border-radius: 6px; }

.note { font-size: 12px; color: var(--text3); }
.warn-note { font-size: 12px; color: #8a6d1a; background: #fdf6e3; border: 1px solid #f0e0b0; border-radius: 6px; padding: 8px 10px; }

/* examples page */
.ex-card { display: flex; flex-direction: column; gap: 10px; }
.ex-card .params { font-size: 12.5px; color: var(--text2); border-top: 1px dashed var(--border); padding-top: 10px; margin-top: auto; }
.ex-card .params div { display: flex; justify-content: space-between; }
.ex-card .params .k { color: var(--text3); }

/* docs */
.docs-grid { display: grid; grid-template-columns: 1fr; gap: 16px; max-width: 860px; }
.doc-card h3 { color: var(--accent); }
.doc-card p, .doc-card li { color: var(--text2); font-size: 13.5px; }
.doc-card ul { margin: 6px 0 0; padding-left: 20px; }
.doc-card li { margin-bottom: 6px; }

/* responsive */
@media (max-width: 1000px) {
  .app-wrap { flex-direction: column; }
  .app-side, .app-right { width: 100%; border: none; border-bottom: 1px solid var(--border); max-height: 45vh; }
  .app-main { order: -1; height: 60vh; }
  .tb-nav { display: none; }
}