:root {
  --bg: #252E31;
  --side: #1A2326;
  --card: #2E3C40;
  --input: #1F2C2F;
  --accent: #7DBFFA;
  --ok: #4ADE80;
  --err: #F87171;
  --warn: #FBBF24;
  --fg: #F0F4F5;
  --fg2: #8FA8AB;
  --fg3: #4A6366;
  --navhi: #2A3B3E;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 14px;
}

a { color: var(--accent); }

.center-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-card {
  background: var(--card);
  border-radius: 12px;
  padding: 32px 28px;
  width: 100%;
  max-width: 360px;
}
.auth-card h1 { font-size: 18px; margin: 0 0 4px; }
.auth-card p.sub { color: var(--fg2); font-size: 13px; margin: 0 0 20px; }

label { display: block; color: var(--fg2); font-size: 12px; margin-bottom: 6px; }

input[type=text], input[type=password], input[type=email], input[type=number], select {
  width: 100%;
  background: var(--input);
  color: var(--fg);
  border: none;
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 14px;
  margin-bottom: 14px;
}
input:focus, select:focus { outline: 1px solid var(--accent); }

button, .btn {
  cursor: pointer;
  border: none;
  border-radius: 6px;
  padding: 10px 18px;
  font-weight: 600;
  font-size: 13px;
  background: var(--accent);
  color: #1A2326;
}
button.ghost, .btn.ghost {
  background: transparent;
  color: var(--fg2);
  border: 1px solid var(--fg3);
}
button.danger { background: #3D1515; color: var(--err); }
button:disabled { background: var(--input); color: var(--fg3); cursor: not-allowed; }
button:hover:not(:disabled) { filter: brightness(1.1); }

.error-text { color: var(--err); font-size: 13px; margin: 0 0 14px; }
.ok-text { color: var(--ok); font-size: 13px; margin: 0 0 14px; }

/* ── App shell ── */
.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 200px;
  background: var(--side);
  padding: 20px 0;
  flex-shrink: 0;
}
.sidebar .brand-block { padding: 0 20px 16px; text-align: center; }
.sidebar .brand-block .logo { font-size: 24px; }
.sidebar .brand-block .name { font-weight: 700; margin-top: 6px; }
.sidebar nav { margin-top: 10px; }
.sidebar .section-label {
  color: var(--fg3); font-size: 10px; font-weight: 700; letter-spacing: .05em;
  padding: 0 20px; margin-bottom: 6px; text-transform: uppercase;
}
.nav-btn {
  display: block; width: 100%; text-align: left; background: transparent;
  color: var(--fg2); padding: 10px 20px; border-radius: 0; font-weight: 500;
}
.nav-btn.active { background: var(--navhi); color: var(--fg); }
.nav-btn:hover:not(.active) { background: rgba(255,255,255,0.03); }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  height: 54px; background: var(--side); display: flex; align-items: center;
  gap: 12px; padding: 0 20px;
}
.topbar select { width: 220px; margin: 0; }
.status-dot { font-weight: 700; font-size: 12px; }
.status-dot.ok { color: var(--ok); }
.status-dot.err { color: var(--err); }

.content { flex: 1; overflow-y: auto; padding: 24px 28px; }
.section-hdr h2 { margin: 0 0 4px; font-size: 18px; }
.section-hdr p { margin: 0 0 18px; color: var(--fg2); font-size: 13px; }

.card {
  background: var(--card); border-radius: 8px; padding: 18px 20px; margin-bottom: 16px;
}
.card .card-title {
  color: var(--fg3); font-size: 10px; font-weight: 700; letter-spacing: .05em;
  text-transform: uppercase; margin: 0 0 12px;
}
.field-row { display: flex; gap: 20px; }
.field-row > div { flex: 1; }
.check-row { display: flex; gap: 24px; align-items: center; margin-bottom: 8px; }
.check-row label { display: flex; align-items: center; gap: 8px; color: var(--fg2); margin: 0; }
.help-text { color: var(--fg3); font-size: 12px; line-height: 1.5; }
.actions-row { display: flex; justify-content: flex-end; gap: 10px; margin-bottom: 20px; }
.inline-row { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
hr.sep { border: none; border-top: 1px solid rgba(96,119,123,0.2); margin: 14px 0; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.log-panel {
  background: var(--side); border-top: 1px solid rgba(0,0,0,0.3);
  max-height: 180px; overflow-y: auto; padding: 10px 20px; font-family: Consolas, monospace;
  font-size: 12px;
}
.log-line { margin: 2px 0; white-space: pre-wrap; word-break: break-word; }
.log-line.ok { color: var(--ok); }
.log-line.err { color: var(--err); }
.log-line.warn { color: var(--warn); }
.log-line.muted { color: var(--fg3); }

.hidden { display: none !important; }