:root {
  --brand: #009eff;
  --brand-deep: #0081d0;
  --brand-hot: #079cfe;
  --brand-dim: rgba(0, 158, 255, 0.16);
  --bg: #05080d;
  --bg-elev: #0c1219;
  --bg-panel: #101820;
  --bg-input: #080d13;
  --ink: #f4f8fb;
  --muted: #8aa0b5;
  --line: #1e2d3c;
  --line-strong: #2a3d50;
  --danger: #e06b6b;
  --ok: #3ecf8e;
  --display: "Syne", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --bar-h: 56px;

  --bg-elevated: var(--bg-elev);
  --border: var(--line);
  --border-strong: var(--line-strong);
  --text: var(--ink);
  --text-muted: var(--muted);
  --accent: var(--brand);
  --accent-hot: var(--brand-hot);
  --accent-dim: var(--brand-dim);
  --cyan: var(--brand-hot);
  --sap: var(--brand);
  --siesa: var(--brand);
  --font: var(--sans);
  --font-display: var(--display);
  --font-mono: var(--mono);
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
}

body.hub, body.workspace {
  background-image:
    radial-gradient(ellipse 70% 45% at 0% 0%, rgba(0, 158, 255, 0.10), transparent 55%),
    radial-gradient(ellipse 50% 40% at 100% 100%, rgba(7, 156, 254, 0.06), transparent 50%);
}

.ei-bar {
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--bar-h);
  padding: 0.45rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 8, 13, 0.92);
  backdrop-filter: blur(12px);
}
.ei-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}
.ei-brand img {
  height: 28px;
  width: auto;
  display: block;
}
.ei-brand span {
  font-family: var(--display);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brand);
  border-left: 1px solid var(--line);
  padding-left: 0.7rem;
}
.ei-nav { display: flex; gap: 0.25rem; flex-wrap: wrap; }
.ei-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.38rem 0.65rem;
  border: 1px solid transparent;
}
.ei-nav a:hover { color: var(--ink); border-color: var(--line); }
.ei-nav a.on { color: var(--brand-hot); border-color: rgba(0, 158, 255, 0.45); background: var(--brand-dim); }
.ei-out {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.38rem 0.7rem;
  cursor: pointer;
}
.ei-out:hover { color: var(--ink); border-color: var(--brand); }

body.workspace .app-shell {
  top: var(--bar-h);
}

.hub-top { display: none; }
.platform-strip { display: none; }

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.4rem 1.6rem 1rem;
}
.hero .kicker {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brand);
}
.hero h1 {
  font-family: var(--display);
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  letter-spacing: -0.04em;
  margin: 0.4rem 0 0.8rem;
  max-width: 16ch;
  line-height: 0.95;
}
.hero p { margin: 0; color: var(--muted); max-width: 54ch; line-height: 1.6; }

.rails {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 1.6rem 2.5rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
@media (max-width: 1100px) { .rails { grid-template-columns: 1fr; } }

.rail {
  border: 1px solid var(--line);
  background: var(--bg-elev);
  padding: 1.25rem;
  min-height: 260px;
  display: flex;
  flex-direction: column;
}
.rail.sap, .rail.siesa, .rail.rest { box-shadow: inset 4px 0 0 var(--brand); }
.rail .sys {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
  color: var(--brand);
}
.rail h2 { font-family: var(--display); margin: 0 0 0.5rem; font-size: 1.45rem; }
.rail p { color: var(--muted); margin: 0 0 1rem; line-height: 1.55; flex: 1; }
.rail .chips { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.chip {
  border: 1px solid var(--line);
  padding: 0.28rem 0.55rem;
  font-size: 0.72rem;
  color: var(--muted);
}
.chip strong { color: var(--ink); }
.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.btn {
  display: inline-block;
  text-decoration: none;
  padding: 0.55rem 0.85rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--brand);
  color: #041018;
  background: var(--brand);
  cursor: pointer;
}
.btn.ghost, .btn.secondary { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.primary, .btn.full { background: var(--brand); color: #041018; border-color: var(--brand); }

.meta-row {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.6rem 2.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
}
@media (max-width: 860px) { .meta-row { grid-template-columns: 1fr; } }
.panel h3 { margin: 0 0 0.6rem; font-family: var(--display); font-size: 1rem; }
.panel ul { margin: 0; padding-left: 1.1rem; color: var(--muted); line-height: 1.7; }
.panel a { color: var(--brand-hot); }

.app { min-height: calc(100vh - var(--bar-h)) !important; }

.docs-shell { display: grid; grid-template-columns: 280px 1fr; min-height: calc(100vh - var(--bar-h)); }
.docs-side { border-right: 1px solid var(--line); overflow: auto; padding: 1rem; }
.docs-side h4 { margin: 1rem 0 0.4rem; font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.docs-side button {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.35rem 0;
  cursor: pointer;
}
.docs-side button.active { color: var(--brand-hot); }
.docs-main { padding: 1.5rem 2rem; overflow: auto; }
.docs-main h1, .docs-main h2, .docs-main h3 { font-family: var(--display); }
.docs-main pre { overflow: auto; border: 1px solid var(--line); padding: 0.8rem; }
.docs-main code { font-family: var(--mono); font-size: 0.85em; }
.muted { color: var(--muted); }

body.workspace .app-brand-mark,
body.workspace .brand-mark {
  background: linear-gradient(135deg, var(--brand-hot), var(--brand-deep)) !important;
  color: #041018 !important;
}
body.workspace .app-nav button.active {
  color: var(--brand-hot);
  border-color: rgba(0, 158, 255, 0.45);
  background: var(--brand-dim);
}
body.workspace .app-brand-text p { color: var(--brand) !important; }
body.workspace .status.ok, body.workspace .status-pill.ok { color: var(--ok); }
body.workspace a { }
body.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #05080d;
  background-image:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(0, 158, 255, 0.18), transparent 50%);
}
.login-card {
  width: min(420px, calc(100vw - 2rem));
  border: 1px solid var(--line);
  background: var(--bg-elev);
  padding: 2rem 1.6rem 1.6rem;
}
.login-card img {
  height: 36px;
  width: auto;
  margin-bottom: 1.4rem;
}
.login-card h1 {
  font-family: var(--display);
  font-size: 1.6rem;
  margin: 0 0 0.35rem;
  letter-spacing: -0.03em;
}
.login-card p { margin: 0 0 1.4rem; color: var(--muted); line-height: 1.5; }
.login-card label { display: block; }
.login-card label span {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}
.login-card input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.95rem;
  padding: 0.7rem 0.75rem;
  outline: none;
}
.login-card input:focus { border-color: var(--brand); }
.login-card button[type="submit"] {
  margin-top: 1rem;
  width: 100%;
  border: 0;
  background: var(--brand);
  color: #041018;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.8rem;
  cursor: pointer;
}
.login-error {
  margin-top: 0.85rem;
  color: var(--danger);
  min-height: 1.2em;
  font-size: 0.78rem;
}
.hidden { display: none !important; }