/* ============================================================
   Nexus-402 — Design Tokens & Global Styles
   ============================================================ */

:root {
  --blue:   #38bdf8;
  --green:  #34d399;
  --red:    #fb7185;
  --yellow: #fbbf24;
  --purple: #c084fc;

  --blue-dim:   rgba(96,  165, 250, 0.12);
  --green-dim:  rgba(74,  222, 128, 0.12);
  --red-dim:    rgba(248, 113, 113, 0.12);
  --yellow-dim: rgba(251, 191,  36, 0.12);
  --purple-dim: rgba(167, 139, 250, 0.12);

  --fg-0: #f8fafc;
  --fg-1: #dbe4ee;
  --fg-2: #a8b3c2;
  --fg-3: #7b8796;
  --fg-4: #596678;

  --bg-1: #080a0f;
  --bg-2: #0d1118;
  --bg-3: #141923;

  --border-1:    rgba(255, 255, 255, 0.07);
  --border-2:    rgba(255, 255, 255, 0.12);
  --border-blue: rgba(96,  165, 250, 0.25);

  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;
  --font-sans: system-ui, -apple-system, 'Segoe UI', Helvetica, sans-serif;
}

/* ============================================================
   Reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 14px; }

body {
  background: linear-gradient(180deg, #090b10 0%, #0d1118 38%, #090b10 100%);
  color: var(--fg-1);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

/* Subtle grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(96,165,250,0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96,165,250,0.022) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* ============================================================
   Typography
   ============================================================ */
.mono  { font-family: var(--font-mono); }
.label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  font-family: var(--font-mono);
}
.dim { color: var(--fg-4); }

/* ============================================================
   Panel / card
   ============================================================ */
.panel {
  background: rgba(13, 17, 24, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 8px;
  position: relative;
}

/* Glowing panel variant used in dashboard hero */
.glow-card {
  background: linear-gradient(180deg, rgba(13,17,24,0.96), rgba(10,13,19,0.98));
  border: 1px solid var(--border-blue);
  border-radius: 8px;
  box-shadow:
    0 0 0 1px rgba(96,165,250,0.05),
    0 16px 60px -34px rgba(56,189,248,0.42),
    inset 0 1px 0 rgba(96,165,250,0.04);
  position: relative;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-1);
  border-radius: 6px;
  color: var(--fg-2);
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background 120ms, border-color 120ms, color 120ms;
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}
.btn:hover {
  background: rgba(255,255,255,0.07);
  border-color: var(--border-2);
  color: var(--fg-0);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  background: linear-gradient(180deg, #3b82f6, #2563eb);
  border: 1px solid rgba(96,165,250,0.55);
  border-radius: 8px;
  color: #fff;
  font-size: 12.5px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  box-shadow: 0 0 24px -8px rgba(59,130,246,0.55), inset 0 1px 0 rgba(255,255,255,0.18);
  transition: background 120ms, box-shadow 120ms;
  text-decoration: none;
  line-height: 1;
}
.btn-primary:hover {
  background: linear-gradient(180deg, #60a5fa, #3b82f6);
  box-shadow: 0 0 36px -6px rgba(59,130,246,0.7), inset 0 1px 0 rgba(255,255,255,0.22);
}
.btn-primary:disabled { cursor: wait; opacity: 0.85; }

/* ============================================================
   Pulsing dot
   ============================================================ */
.pulse-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse-ring 1.8s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  flex-shrink: 0;
}
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0   currentColor; }
  50%  { box-shadow: 0 0 0 5px currentColor; opacity: 0.4; }
  100% { box-shadow: 0 0 0 0   currentColor; opacity: 0; }
}

/* ============================================================
   Keyboard key
   ============================================================ */
.kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 18px;
  padding: 0 5px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-2);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
}

/* ============================================================
   Tab navigation
   ============================================================ */
.tab-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0 14px;
  height: 100%;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-3);
  border-bottom: 2px solid transparent;
  transition: color 120ms, border-color 120ms;
  white-space: nowrap;
  text-decoration: none;
}
.tab-link:hover { color: var(--fg-1); }
.tab-link.active {
  color: var(--fg-0);
  border-bottom-color: var(--blue);
}

/* ============================================================
   Table
   ============================================================ */
.row-hover:hover { background: rgba(255,255,255,0.022); }

/* ============================================================
   Sparkline path
   ============================================================ */
.spark {
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ============================================================
   Animated flow connector line (SVG)
   ============================================================ */
.flow-line-active {
  stroke-dasharray: 4 4;
  animation: dash-flow 0.55s linear infinite;
}
@keyframes dash-flow {
  to { stroke-dashoffset: -8; }
}

/* ============================================================
   Spinner
   ============================================================ */
.spin { animation: spin 0.85s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   Scrollbar
   ============================================================ */
::-webkit-scrollbar         { width: 5px; height: 5px; }
::-webkit-scrollbar-track   { background: transparent; }
::-webkit-scrollbar-thumb   { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.18); }

/* ============================================================
   Responsive helpers
   ============================================================ */
.hide-md { display: flex; }   /* hidden on mobile */
.hide-lg { display: none; }   /* shown on mobile only */

@media (max-width: 880px) {
  .hide-md { display: none   !important; }
  .hide-lg { display: flex   !important; }

  html { font-size: 13px; }

  body { line-height: 1.45; }
}

/* ============================================================
   Loading screen (shown before React hydrates)
   ============================================================ */
#loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: 16px;
}