:root {
  --bg: #0b0f17;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --brand: #f59e0b;
  --line: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  background: radial-gradient(1200px 600px at 10% 10%, rgba(245, 158, 11, 0.14), transparent 60%),
              radial-gradient(1000px 500px at 90% 20%, rgba(59, 130, 246, 0.12), transparent 55%),
              var(--bg);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
}

.topbar {
  border-bottom: 1px solid var(--line);
  background: rgba(17, 24, 39, 0.55);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.topbar__brand a { font-weight: 700; letter-spacing: 0.2px; color: var(--brand); }
.topbar__nav { display: flex; gap: 14px; flex-wrap: wrap; }
.topbar__nav a { color: var(--text); opacity: 0.9; }
.topbar__nav a:hover { opacity: 1; }

.panel {
  background: rgba(17, 24, 39, 0.72);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
}

.grid { display: grid; gap: 16px; }
.grid--2 { grid-template-columns: 1fr; }
@media (min-width: 900px) {
  .grid--2 { grid-template-columns: 1.2fr 0.8fr; }
}

.muted { color: var(--muted); }

.btn {
  display: inline-block;
  border: 1px solid var(--line);
  background: rgba(245, 158, 11, 0.08);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 10px;
  font-weight: 600;
}
.btn:hover { background: rgba(245, 158, 11, 0.14); text-decoration: none; }
.btn--ghost { background: transparent; }

.messages { display: grid; gap: 8px; margin: 12px 0; }
.message {
  border: 1px solid var(--line);
  background: rgba(17, 24, 39, 0.72);
  padding: 10px 12px;
  border-radius: 12px;
}
.message--error { border-color: rgba(239, 68, 68, 0.35); }
.message--success { border-color: rgba(16, 185, 129, 0.35); }
.message--info { border-color: rgba(59, 130, 246, 0.35); }

input[type="text"], input[type="email"], input[type="password"], input[type="number"], textarea, select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.25);
  color: var(--text);
}
textarea { min-height: 180px; }

.form-row { margin-bottom: 12px; }
.form-row label { display: block; margin-bottom: 6px; color: var(--muted); }
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; }

pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
}

.kpi { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.kpi__item { padding: 12px; border-radius: 12px; border: 1px solid var(--line); background: rgba(17, 24, 39, 0.72); }
.kpi__value { font-size: 22px; font-weight: 800; }
.kpi__label { color: var(--muted); font-size: 13px; margin-top: 4px; }