*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #0f1117;
  --bg2:     #181c27;
  --bg3:     #1e2333;
  --border:  rgba(255,255,255,0.08);
  --border2: rgba(255,255,255,0.14);
  --text:    #e8eaf0;
  --text2:   #8b90a0;
  --text3:   #555b6e;
  --accent:  #5b7fff;
  --accent2: #3d5cdb;
  --ok:      #2ecc88;
  --warn:    #f5a623;
  --danger:  #e8415a;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --sans: 'Inter', system-ui, sans-serif;
}

html, body { height: 100%; overflow: hidden; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  display: grid;
  grid-template-rows: 48px 1fr;
  grid-template-columns: 260px 1fr 280px;
}

/* ── TOPBAR ── */
#topbar {
  grid-column: 1 / -1;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
}
.logo { font-size: 13px; font-weight: 700; letter-spacing: .08em; color: var(--accent); text-transform: uppercase; }
.logo span { color: var(--text2); font-weight: 400; }
.sep { width: 1px; height: 20px; background: var(--border); }
.mode-btn {
  font-size: 12px; padding: 4px 12px; border-radius: 4px;
  border: 1px solid var(--border2); background: transparent;
  color: var(--text2); cursor: pointer; transition: all .15s;
}
.mode-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.mode-btn:hover:not(.active) { color: var(--text); }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.sim-label { font-family: var(--mono); font-size: 11px; color: var(--text3); }

/* ── LEFT PANEL ── */
#left {
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.ptitle {
  font-size: 10px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--text3);
  padding: 12px 14px 6px; flex-shrink: 0;
}
#node-list { flex: 1; overflow-y: auto; padding: 0 8px 8px; min-height: 0; }
.nitem {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 8px; border-radius: 6px; cursor: pointer;
  transition: background .1s; font-size: 12px;
}
.nitem:hover { background: var(--bg3); }
.nitem.sel { background: rgba(91,127,255,.12); }
.ndot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.nlabel { flex: 1; color: var(--text); }
.nrisk { font-family: var(--mono); font-size: 10px; color: var(--text3); }
.nbadge {
  font-size: 9px; padding: 1px 5px; border-radius: 3px; display: none;
}
.nbadge.fail { background: rgba(232,65,90,.2); color: var(--danger); }
.nbadge.spof { background: rgba(245,166,35,.2); color: var(--warn); }
.nbadge.on { display: block; }

.psection { padding: 8px 14px; border-top: 1px solid var(--border); flex-shrink: 0; }
.row { display: flex; gap: 6px; margin-top: 6px; }
input.tinput {
  flex: 1; background: var(--bg3); border: 1px solid var(--border2);
  border-radius: 4px; color: var(--text); font-size: 12px;
  padding: 5px 8px; outline: none; font-family: var(--sans);
}
input.tinput:focus { border-color: var(--accent); }
select.tsel {
  flex: 1; background: var(--bg3); border: 1px solid var(--border2);
  border-radius: 4px; color: var(--text); font-size: 12px;
  padding: 5px 8px; outline: none; cursor: pointer;
}
select.tsel:focus { border-color: var(--accent); }
.btn {
  font-size: 11px; padding: 5px 10px; border-radius: 4px;
  border: 1px solid var(--border2); background: var(--bg3);
  color: var(--text2); cursor: pointer; white-space: nowrap; transition: all .15s;
}
.btn:hover { color: var(--text); border-color: var(--accent); }
.btn.pri { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.pri:hover { background: var(--accent2); border-color: var(--accent2); }
.btn.pri:disabled { opacity: .5; cursor: default; }
.btn.dng { border-color: rgba(232,65,90,.4); color: var(--danger); }
.btn.dng:hover { background: rgba(232,65,90,.1); border-color: var(--danger); }

/* ── CANVAS ── */
#canvas { position: relative; background: var(--bg); overflow: hidden; }
#canvas svg { width: 100%; height: 100%; }
.nc { cursor: pointer; }
.nc:hover circle { opacity: .8; }

#fail-banner {
  position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
  background: rgba(232,65,90,.15); border: 1px solid rgba(232,65,90,.3);
  border-radius: 6px; padding: 6px 14px; font-size: 12px; color: var(--danger);
  pointer-events: none; white-space: nowrap; display: none;
}
#canvas-btns {
  position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 6px;
  background: var(--bg2); border: 1px solid var(--border2); border-radius: 8px; padding: 6px;
}
#whatif-box {
  position: absolute; top: 12px; right: 12px; width: 210px;
  background: var(--bg2); border: 1px solid var(--border2); border-radius: 8px;
  padding: 12px; display: none;
}
.wrow { display: flex; justify-content: space-between; font-size: 12px; margin-bottom: 5px; }
.wlbl { color: var(--text2); }
#legend {
  position: absolute; bottom: 60px; left: 12px;
  font-size: 10px; color: var(--text3);
  display: flex; flex-direction: column; gap: 4px;
}
.litem { display: flex; align-items: center; gap: 5px; }
.ldot { width: 8px; height: 8px; border-radius: 50%; }

/* ── RIGHT PANEL ── */
#right {
  background: var(--bg2);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden;
}
#right-content {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px;
  min-height: 0;
}

/* inspector */
.empty { font-size: 12px; color: var(--text3); text-align: center; margin-top: 40px; line-height: 1.6; }
.frow { margin-bottom: 14px; }
.flbl { font-size: 10px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--text3); margin-bottom: 5px; }
.fval { font-size: 13px; color: var(--text); }
.pills { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 4px; }
.pill {
  font-size: 11px; padding: 3px 8px; border-radius: 4px;
  border: 1px solid var(--border2); cursor: pointer; color: var(--text2); transition: all .1s;
}
.pill.on { color: #fff; }
.srow { display: flex; align-items: center; gap: 8px; }
.srow input[type=range] { flex: 1; accent-color: var(--accent); cursor: pointer; }
.sval { font-family: var(--mono); font-size: 12px; color: var(--text); min-width: 36px; text-align: right; }
.ibadge { display: inline-block; font-size: 11px; padding: 3px 8px; border-radius: 4px; font-weight: 500; }
.ibadge.low { background: rgba(46,204,136,.15); color: var(--ok); }
.ibadge.med { background: rgba(245,166,35,.15); color: var(--warn); }
.ibadge.high { background: rgba(232,65,90,.15); color: var(--danger); }

/* monte carlo */
.mc-run-btn { width: 100%; margin-bottom: 14px; padding: 8px; font-size: 13px; }
.mc-card { background: var(--bg3); border-radius: 6px; padding: 10px 12px; margin-bottom: 10px; }
.mcrow { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 12px; }
.mclbl { color: var(--text2); }
.mcval { font-family: var(--mono); color: var(--text); font-weight: 500; }
.barwrap { margin-top: 8px; }
.barlbl { font-size: 10px; color: var(--text3); margin-bottom: 3px; }
.barbg { background: var(--bg); border-radius: 3px; height: 6px; overflow: hidden; }
.barfill { height: 6px; border-radius: 3px; transition: width .4s; }
.mc-hint { font-size: 12px; color: var(--text3); text-align: center; padding: 16px 0; line-height: 1.6; }
/* ── LANG + BACK ── */
.nav-back {
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em;
  color: var(--text3); text-decoration: none; transition: color .15s;
}
.nav-back:hover { color: var(--text2); }
.lang-btn {
  font-family: var(--mono); font-size: 11px; letter-spacing: .1em;
  padding: 4px 8px; border-radius: 3px; cursor: pointer;
  border: 1px solid var(--border); background: transparent; color: var(--text3);
  transition: all .15s;
}
.lang-btn.active { border-color: var(--border2); color: var(--text); }
.lang-btn:hover { color: var(--text); }