:root {
  --bg: #0b1220;
  --panel: #121c2f;
  --panel-soft: #17243a;
  --text: #e7edf7;
  --muted: #94a3b8;
  --accent: #5eead4;
  --accent-2: #38bdf8;
  --danger: #fb7185;
  --warning: #f59e0b;
  --border: rgba(148, 163, 184, 0.18);
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  --radius: 18px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
  background: radial-gradient(circle at top, #10203d, var(--bg) 45%);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea {
  font: inherit;
}
.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}
.sidebar {
  padding: 28px 22px;
  background: rgba(7, 12, 22, 0.9);
  border-right: 1px solid var(--border);
  backdrop-filter: blur(10px);
}
.brand {
  margin-bottom: 28px;
}
.brand h1 {
  margin: 0;
  font-size: 24px;
}
.brand p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}
.nav {
  display: grid;
  gap: 10px;
}
.nav a {
  padding: 12px 14px;
  border-radius: 14px;
  color: var(--muted);
  background: transparent;
  transition: 0.2s ease;
}
.nav a.active, .nav a:hover {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.18), rgba(94, 234, 212, 0.14));
  color: var(--text);
}
.main {
  padding: 28px;
}
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
}
.header h2 {
  margin: 0;
  font-size: 30px;
}
.header p {
  margin: 6px 0 0;
  color: var(--muted);
}
.grid {
  display: grid;
  gap: 18px;
}
.grid.cards { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid.two { grid-template-columns: 1.2fr 0.8fr; }
.card {
  background: linear-gradient(180deg, rgba(18, 28, 47, 0.96), rgba(10, 18, 31, 0.98));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card h3, .card h4 {
  margin-top: 0;
}
.stat {
  font-size: 32px;
  font-weight: 700;
  margin: 8px 0;
}
.muted {
  color: var(--muted);
}
.list {
  display: grid;
  gap: 12px;
}
.item {
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(23, 36, 58, 0.68);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.12);
  color: #d4f4ff;
  font-size: 12px;
}
.badge.warning { background: rgba(245, 158, 11, 0.18); }
.badge.danger { background: rgba(251, 113, 133, 0.18); }
.badge.success { background: rgba(94, 234, 212, 0.16); }
.form-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
label {
  display: block;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 8px;
}
input, select, textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(12, 20, 34, 0.96);
  color: var(--text);
}
textarea { min-height: 120px; resize: vertical; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  padding: 11px 16px;
  border-radius: 14px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #082032;
  font-weight: 700;
  cursor: pointer;
}
.btn.secondary {
  background: rgba(23, 36, 58, 0.9);
  color: var(--text);
  border-color: var(--border);
}
.btn.ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
}
.btn.danger {
  background: rgba(251, 113, 133, 0.16);
  color: #ffdce4;
  border-color: rgba(251, 113, 133, 0.28);
}
.chat-shell {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 18px;
}
.chat-messages {
  display: grid;
  gap: 12px;
  max-height: 62vh;
  overflow-y: auto;
}
.chat-message {
  padding: 14px;
  border-radius: 16px;
  background: rgba(23, 36, 58, 0.75);
  border: 1px solid var(--border);
}
.chat-message.user {
  background: rgba(56, 189, 248, 0.12);
}
.chat-message .role {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 6px;
}
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-card {
  width: min(460px, 100%);
}
.table {
  width: 100%;
  border-collapse: collapse;
}
.table th, .table td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.table th { color: var(--muted); font-weight: 600; }
.kv {
  display: grid;
  gap: 10px;
}
.kv div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}
.inline-form { display: inline; }
.error-box {
  margin-bottom: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(251, 113, 133, 0.15);
  border: 1px solid rgba(251, 113, 133, 0.28);
}
@media (max-width: 980px) {
  .layout, .chat-shell, .grid.two { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--border); }
  .main { padding: 18px; }
}