:root {
  --bg: #0f1420;
  --bg-panel: #161d2e;
  --bg-panel-alt: #1c2438;
  --border: #2a3448;
  --text: #e6e9f2;
  --text-muted: #8b93a7;
  --accent: #4f7cff;
  --accent-hover: #3a63e0;
  --green: #29c46a;
  --red: #ef4a5f;
  --yellow: #f5a623;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
}

.sidebar .brand {
  padding: 0 20px 20px;
  font-weight: 700;
  font-size: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.sidebar nav { display: flex; flex-direction: column; gap: 2px; }

.sidebar nav a {
  padding: 10px 20px;
  color: var(--text-muted);
  font-size: 14px;
  border-left: 3px solid transparent;
}

.sidebar nav a:hover { color: var(--text); text-decoration: none; background: var(--bg-panel-alt); }

.sidebar nav a.active {
  color: var(--text);
  border-left-color: var(--accent);
  background: var(--bg-panel-alt);
}

.sidebar .user-box {
  margin-top: auto;
  padding: 16px 20px 0;
  border-top: 1px solid var(--border);
}

.sidebar .user-box .name { font-size: 14px; font-weight: 600; }
.sidebar .user-box .role { font-size: 12px; color: var(--text-muted); text-transform: capitalize; }

.sidebar .user-box form { margin-top: 10px; }

.main {
  flex: 1;
  padding: 28px 32px;
  max-width: 1200px;
}

.main h1 { margin-top: 0; font-size: 22px; }

.card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }

tr.instance-row { cursor: pointer; }
tr.instance-row:hover { background: var(--bg-panel-alt); }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  text-transform: capitalize;
}

.badge.online { background: rgba(41, 196, 106, 0.15); color: var(--green); }
.badge.stopped, .badge.stopping, .badge.errored { background: rgba(239, 74, 95, 0.15); color: var(--red); }
.badge.launching, .badge.restarting { background: rgba(245, 166, 35, 0.15); color: var(--yellow); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-panel-alt);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}

.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.danger { color: var(--red); }
.btn.danger:hover { border-color: var(--red); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.actions { display: flex; gap: 6px; flex-wrap: wrap; }

.empty-state { color: var(--text-muted); padding: 24px 0; text-align: center; }

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.login-box {
  width: 320px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.login-box h1 { font-size: 18px; margin-top: 0; }

.field { margin-bottom: 14px; display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; color: var(--text-muted); }

.field input, .field select {
  background: var(--bg-panel-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 9px 10px;
  color: var(--text);
  font-size: 14px;
}

.field input:focus, .field select:focus { outline: none; border-color: var(--accent); }

.alert {
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 14px;
}

.alert.error { background: rgba(239, 74, 95, 0.12); color: var(--red); border: 1px solid rgba(239, 74, 95, 0.35); }

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
}

.info-grid .item .label { font-size: 12px; color: var(--text-muted); }
.info-grid .item .value { font-size: 14px; margin-top: 2px; word-break: break-all; }

.tabs { display: flex; gap: 4px; margin-bottom: 12px; }

.tabs button {
  padding: 6px 14px;
  border: 1px solid var(--border);
  background: var(--bg-panel-alt);
  color: var(--text-muted);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}

.tabs button.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.log-view {
  background: #0a0e18;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 480px;
  overflow-y: auto;
}

.back-link { display: inline-block; margin-bottom: 14px; font-size: 13px; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}