:root {
  --bg: #07080d;
  --panel: #11131a;
  --panel-2: #171a23;
  --panel-3: #1d212d;
  --line: #2b3040;
  --text: #f5f7fb;
  --muted: #9aa3b3;
  --red: #d9272e;
  --red-2: #ff3b43;
  --blue: #66b7ec;
  --blue-dark: #172f66;
  --green: #35d07f;
  --amber: #f5b84b;
  --danger: #ff4b4b;
  --white: #ffffff;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.32);
  --radius: 0px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: radial-gradient(circle at 20% 0%, rgba(217, 39, 46, 0.18), transparent 28%),
              radial-gradient(circle at 78% 10%, rgba(102, 183, 236, 0.12), transparent 25%),
              var(--bg);
  color: var(--text);
  font-family: var(--font);
}
button, input { font: inherit; }
button { cursor: pointer; }

.app-shell {
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

.topbar {
  min-height: 82px;
  display: grid;
  grid-template-columns: 180px 1fr 310px;
  gap: 20px;
  align-items: center;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 8, 13, 0.88);
  backdrop-filter: blur(12px);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 18px;
}
.logo {
  object-fit: contain;
  display: block;
  border: none;
  outline: none;
  background: transparent;
  box-shadow: none;
}
.logo-aetec { width: 46px; height: 46px; }
.logo-avimrc { width: 62px; height: 46px; }
.title-block .eyebrow {
  color: var(--red-2);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 11px;
  font-weight: 800;
}
.title-block h1 {
  margin: 2px 0 0;
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.05;
}
.title-block p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 13px;
}
.project-meta {
  text-align: right;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}
.project-meta strong {
  margin-top: 6px;
  display: block;
  color: var(--text);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 11px;
}

.nav-tabs {
  display: flex;
  gap: 8px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 12, 18, 0.9);
  overflow-x: auto;
}
.tab {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  padding: 9px 13px;
  min-width: max-content;
}
.tab.active {
  color: var(--text);
  border-color: rgba(217, 39, 46, 0.75);
  background: linear-gradient(180deg, rgba(217, 39, 46, 0.28), rgba(217, 39, 46, 0.08));
}

main { flex: 1; }
.page { display: none; }
.page.active { display: block; }

.sim-grid {
  height: calc(100vh - 157px);
  min-height: 720px;
  display: grid;
  grid-template-columns: 310px minmax(480px, 1fr) 340px;
  gap: 14px;
  padding: 14px;
}
.panel {
  background: linear-gradient(180deg, rgba(28, 31, 42, 0.95), rgba(14, 16, 23, 0.95));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel-title {
  padding: 14px 16px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  font-weight: 800;
}
.control-panel, .dashboard-panel { overflow-y: auto; }
.option-switch { padding: 14px; display: grid; gap: 10px; }
.option-card {
  width: 100%;
  border: 1px solid var(--line);
  background: #10131c;
  color: var(--text);
  text-align: left;
  padding: 14px;
  display: grid;
  gap: 4px;
}
.option-card.active {
  border-color: var(--red);
  background: linear-gradient(135deg, rgba(217, 39, 46, 0.25), rgba(25, 29, 39, 0.95));
}
.option-label {
  color: var(--red-2);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  font-weight: 900;
}
.option-card strong { font-size: 15px; }
.option-card small { color: var(--muted); }

.button-stack { padding: 0 14px 12px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.button-stack .primary { grid-column: span 2; }
button {
  border: 1px solid var(--line);
  background: var(--panel-3);
  color: var(--text);
  padding: 10px 12px;
}
button.primary {
  background: linear-gradient(180deg, var(--red-2), #b91f25);
  border-color: #ff5860;
  color: #fff;
  font-weight: 800;
}
button.ghost { background: transparent; color: var(--muted); }
.mode-row, .toggle-row {
  padding: 10px 14px;
  display: grid;
  gap: 8px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}
.mode-row label, .toggle-row label { display: flex; gap: 8px; align-items: center; }
.slider-label {
  padding: 12px 14px 0;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 13px;
}
#speedSlider { width: calc(100% - 28px); margin: 10px 14px 14px; accent-color: var(--red); }

.fault-box { padding: 14px; border-top: 1px solid var(--line); display: grid; gap: 8px; }
.fault-title { color: var(--muted); font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 4px; }
.fault-btn { border-color: rgba(245, 184, 75, 0.45); color: #ffcf7d; background: rgba(245, 184, 75, 0.08); }

.viewer-panel {
  position: relative;
  border: 1px solid var(--line);
  background: #05070b;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.canvas-mount { width: 100%; height: 100%; }
.viewer-overlay {
  position: absolute;
  z-index: 10;
  padding: 12px 14px;
  background: rgba(9, 10, 15, 0.74);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  max-width: 430px;
}
.viewer-overlay.top-left { left: 16px; top: 16px; }
.viewer-overlay span {
  display: inline-block;
  background: var(--red);
  color: #fff;
  padding: 3px 7px;
  font-weight: 900;
  letter-spacing: 0.08em;
  font-size: 11px;
}
.viewer-overlay strong { display: block; margin: 8px 0 2px; font-size: 15px; }
.viewer-overlay small { color: var(--muted); line-height: 1.4; }

.alarm-banner {
  position: absolute;
  left: 50%;
  top: 18px;
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: rgba(255, 75, 75, 0.92);
  color: #fff;
  box-shadow: 0 12px 30px rgba(255, 75, 75, 0.25);
}
.alarm-banner.hidden { display: none; }
.alarm-banner button { background: rgba(0,0,0,0.25); border-color: rgba(255,255,255,0.32); padding: 6px 10px; }

.timeline-strip {
  position: absolute;
  z-index: 10;
  left: 14px;
  right: 14px;
  bottom: 14px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(78px, 1fr));
  gap: 5px;
}
.step-chip {
  background: rgba(17, 19, 26, 0.85);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--muted);
  padding: 8px 7px;
  font-size: 10px;
  text-align: center;
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1.15;
}
.step-chip.active {
  color: #fff;
  border-color: var(--red);
  background: rgba(217, 39, 46, 0.7);
}
.step-chip.done {
  color: #c5ffd8;
  border-color: rgba(53, 208, 127, 0.4);
}

.dashboard-panel { padding-bottom: 14px; }
.status-card, .metric, .process-card, .note-card {
  margin: 14px;
  background: rgba(9, 11, 16, 0.72);
  border: 1px solid var(--line);
  padding: 13px;
}
.status-card span, .metric span { color: var(--muted); font-size: 12px; display: block; }
.status-card strong { font-size: 26px; display: block; margin-top: 5px; }
.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; padding: 0 14px; }
.metric { margin: 0; min-height: 82px; }
.metric strong { display: block; margin-top: 8px; font-size: 18px; color: var(--text); }
.process-card h3, .note-card h3 { margin: 0 0 10px; font-size: 14px; }
.io-row { display: flex; justify-content: space-between; gap: 10px; padding: 8px 0; border-top: 1px solid rgba(255,255,255,0.06); color: var(--muted); }
.io-row:first-of-type { border-top: none; }
.io-row b { color: var(--green); font-size: 12px; letter-spacing: 0.06em; }
.note-card p { color: var(--muted); line-height: 1.45; margin: 8px 0; font-size: 13px; }

.document-page { padding: 24px; }
.doc-header {
  max-width: 1100px;
  margin: 0 auto 22px;
  border: 1px solid var(--line);
  background: rgba(18,20,28,0.92);
  padding: 20px 22px;
}
.doc-header h2 { margin: 0 0 6px; font-size: 30px; }
.doc-header p { margin: 0; color: var(--muted); line-height: 1.5; }
.comparison-grid {
  max-width: 1250px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.proposal-card, .light-panel, .qa-grid article {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(28, 31, 42, 0.92), rgba(12, 14, 20, 0.96));
  padding: 18px;
  box-shadow: var(--shadow);
}
.proposal-card .tag {
  display: inline-block;
  color: #fff;
  background: var(--red);
  padding: 4px 8px;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.proposal-card.recommended .tag { background: var(--blue-dark); }
.proposal-card.premium .tag { background: #6a3cff; }
.proposal-card h3 { margin: 14px 0 8px; font-size: 20px; min-height: 72px; }
.proposal-card .price { font-size: 30px; color: #fff; font-weight: 900; margin: 8px 0 14px; }
ul { padding-left: 19px; }
li { margin: 8px 0; color: #d2d7e3; line-height: 1.45; }
dl { border-top: 1px solid var(--line); margin: 16px 0 0; padding-top: 12px; display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; }
dt { color: var(--muted); }
dd { margin: 0; text-align: right; font-weight: 800; }
.two-column, .scope-grid, .qa-grid {
  max-width: 1250px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}
.two-column { grid-template-columns: 1.2fr 0.8fr; }
.scope-grid { grid-template-columns: repeat(2, 1fr); }
.qa-grid { grid-template-columns: repeat(3, 1fr); }
.light-panel h3, .qa-grid h3 { margin: 0 0 10px; color: var(--text); }
.light-panel p, .qa-grid p { color: #d2d7e3; line-height: 1.55; }
table { width: 100%; border-collapse: collapse; margin-top: 12px; }
th, td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; color: #d2d7e3; }
th { background: rgba(217, 39, 46, 0.18); color: #fff; }
.big-number-row { display: flex; align-items: center; justify-content: space-between; border: 1px solid var(--line); padding: 16px; margin: 10px 0; }
.big-number-row span { color: var(--muted); }
.big-number-row strong { font-size: 22px; }
.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 10px 24px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--line);
  background: rgba(7,8,13,0.9);
}

@media (max-width: 1180px) {
  .topbar { grid-template-columns: 140px 1fr; }
  .project-meta { display: none; }
  .sim-grid { grid-template-columns: 280px 1fr; height: auto; min-height: 760px; }
  .dashboard-panel { grid-column: 1 / -1; display: grid; grid-template-columns: 240px 1fr 1fr; gap: 0; }
  .comparison-grid, .qa-grid { grid-template-columns: 1fr; }
  .scope-grid, .two-column { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .topbar { grid-template-columns: 1fr; gap: 10px; }
  .brand-lockup { justify-content: flex-start; }
  .sim-grid { grid-template-columns: 1fr; padding: 8px; }
  .viewer-panel { height: 520px; }
  .dashboard-panel { grid-template-columns: 1fr; }
  .timeline-strip { grid-template-columns: repeat(2, 1fr); }
  .document-page { padding: 12px; }
  .footer { flex-direction: column; }
}