frontend/src/index.css

@import "tailwindcss";

@theme {
  --font-sans: 'Inter', ui-sans-serif, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --color-bg-primary: #0a0e1a;
  --color-bg-secondary: #111827;
  --color-bg-card: #1a1f35;
  --color-bg-card-hover: #222845;
  --color-bg-elevated: #252b45;
  --color-border: #2a3150;
  --color-border-subtle: #1e2440;

  --color-text-primary: #f1f5f9;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-text-accent: #818cf8;

  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-surface-alt: #161b2e;

  --color-accent-indigo: #6366f1;
  --color-accent-indigo-light: #818cf8;
  --color-accent-teal: #14b8a6;
  --color-accent-teal-light: #2dd4bf;
  --color-accent-rose: #f43f5e;
  --color-accent-amber: #f59e0b;
  --color-accent-emerald: #10b981;

  --color-bank-a: #6366f1;
  --color-bank-b: #14b8a6;
  --color-bank-c: #f59e0b;

  --color-status-success: #10b981;
  --color-status-warning: #f59e0b;
  --color-status-error: #ef4444;
  --color-status-info: #3b82f6;
  --color-status-pending: #8b5cf6;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

/* ── Base ────────────────────────────────── */
* {
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  min-height: 100vh;
}

#root {
  min-height: 100vh;
}

/* ── Scrollbar ──────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ── No scrollbar utility ────────────────── */
.no-scrollbar::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

/* ── Glass Card ─────────────────────────── */
.glass-card {
  background: linear-gradient(
    135deg,
    rgba(26, 31, 53, 0.94) 0%,
    rgba(17, 24, 39, 0.88) 100%
  );
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.glass-card:hover {
  border-color: var(--color-accent-indigo);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.1);
}

/* ── Gradient Text ──────────────────────── */
.gradient-text {
  background: linear-gradient(135deg, var(--color-accent-indigo-light), var(--color-accent-teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Pulse Animation ────────────────────── */
@keyframes pulse-glow {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px rgba(99, 102, 241, 0.3); }
  50% { opacity: 0.7; box-shadow: 0 0 16px rgba(99, 102, 241, 0.6); }
}

.animate-pulse-glow {
  animation: pulse-glow 2s ease-in-out infinite;
}

/* ── Status Dot ─────────────────────────── */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.status-dot--active { background: var(--color-status-success); }
.status-dot--dropped { background: var(--color-status-error); }
.status-dot--reconnected { background: var(--color-status-warning); }
.status-dot--offline { background: var(--color-text-muted); }
.status-dot--pending { background: var(--color-status-pending); }

/* ── Metric Badge ───────────────────────── */
.metric-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
}
.metric-badge--positive {
  background: rgba(16, 185, 129, 0.15);
  color: var(--color-status-success);
}
.metric-badge--negative {
  background: rgba(239, 68, 68, 0.15);
  color: var(--color-status-error);
}
.metric-badge--neutral {
  background: rgba(148, 163, 184, 0.15);
  color: var(--color-text-secondary);
}

/* ── Native Dropdown Styling for Dark Mode ── */
select {
  color-scheme: dark;
}
select option {
  background-color: var(--color-bg-card);
  color: var(--color-text-primary);
}

/* ── Unified Design System Button Utilities ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #ffffff;
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 50%, #9333ea 100%);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.35);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #818cf8 0%, #6366f1 50%, #a855f7 100%);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.55);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #e2e8f0;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(99, 102, 241, 0.4);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: scale(0.98);
}