:root {
  --gb-bg:       #282828;
  --gb-bg-hard:  #1d2021;
  --gb-bg1:      #3c3836;
  --gb-bg2:      #504945;
  --gb-bg3:      #665c54;
  --gb-fg:       #ebdbb2;
  --gb-fg2:      #d5c4a1;
  --gb-fg4:      #a89984;
  --gb-red:      #cc241d;
  --gb-red-b:    #fb4934;
  --gb-green:    #98971a;
  --gb-green-b:  #b8bb26;
  --gb-yellow:   #d79921;
  --gb-yellow-b: #fabd2f;
  --gb-blue:     #458588;
  --gb-blue-b:   #83a598;
  --gb-purple:   #b16286;
  --gb-purple-b: #d3869b;
  --gb-aqua:     #689d6a;
  --gb-aqua-b:   #8ec07c;
  --gb-orange:   #d65d0e;
  --gb-orange-b: #fe8019;
  --gb-gray:     #928374;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  font-family: 'JetBrains Mono', monospace;
  background: var(--gb-bg);
  color: var(--gb-fg);
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

a { color: var(--gb-blue-b); text-decoration: none; }
a:hover { color: var(--gb-aqua-b); }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--gb-bg); }
::-webkit-scrollbar-thumb { background: var(--gb-bg2); }

/* ── Nav ─────────────────────────────────────────────────── */
nav {
  background: var(--gb-bg1);
  border-bottom: 1px solid var(--gb-bg2);
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 44px;
  gap: 28px;
}
.nav-brand {
  color: var(--gb-yellow-b);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  text-decoration: none;
}
.nav-brand:hover { color: var(--gb-yellow-b); }
.nav-link { color: var(--gb-fg4); font-size: 0.8rem; letter-spacing: 0.05em; }
.nav-link:hover, .nav-link.active { color: var(--gb-fg); text-decoration: none; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.12s, border-color 0.12s, color 0.12s;
  white-space: nowrap;
}
.btn:hover { opacity: 0.85; text-decoration: none; }
.btn:disabled { opacity: 0.3; cursor: not-allowed; }

.btn-primary  { background: var(--gb-blue);  color: var(--gb-bg); border-color: var(--gb-blue-b); }
.btn-ghost    { background: transparent; color: var(--gb-fg4); border-color: var(--gb-bg2); }
.btn-ghost:hover { color: var(--gb-fg); border-color: var(--gb-blue-b); }
.btn-action   { background: transparent; color: var(--gb-fg4); border-color: var(--gb-bg2); }
.btn-action:hover { color: var(--gb-aqua-b); border-color: var(--gb-aqua); }

/* ── Inputs ──────────────────────────────────────────────── */
.gb-input {
  background: var(--gb-bg1);
  border: 1px solid var(--gb-bg2);
  color: var(--gb-fg);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  padding: 6px 10px;
  border-radius: 2px;
  outline: none;
  transition: border-color 0.12s;
}
.gb-input::placeholder { color: var(--gb-bg3); }
.gb-input:focus { border-color: var(--gb-blue-b); }
.gb-input:disabled { opacity: 0.4; }

/* ── Cards ───────────────────────────────────────────────── */
.gb-card {
  background: var(--gb-bg1);
  border: 1px solid var(--gb-bg2);
  border-radius: 2px;
}

/* ── Hover / tooltip overlays (graph page) ───────────────── */
.gb-panel {
  background: var(--gb-bg1);
  border: 1px solid var(--gb-bg2);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
}
.gb-panel-header {
  padding: 6px 10px;
  border-bottom: 1px solid var(--gb-bg2);
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.gb-panel-row {
  padding: 2px 10px;
  display: flex;
  gap: 8px;
}
.gb-panel-label { color: var(--gb-fg4); text-transform: uppercase; letter-spacing: 0.08em; width: 90px; flex-shrink: 0; }
.gb-panel-value { color: var(--gb-fg2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gb-panel-section { padding: 6px 10px 4px; border-top: 1px solid var(--gb-bg2); margin-top: 4px; }
.gb-panel-desc { padding: 6px 10px 8px; border-top: 1px solid var(--gb-bg2); color: var(--gb-fg4); line-height: 1.5; }