@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

@tailwind base;
@tailwind components;
@tailwind utilities;

:root {
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --bg-tertiary: #334155;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --border: #475569;
  --accent: #38BDF8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
}

#root {
  width: 100vw;
  height: 100vh;
}

/* ── Custom Scrollbar ────────────────────────────────────── */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ── Glassmorphism Utility ───────────────────────────────── */
.glass {
  background: rgba(30, 41, 59, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.glass-panel {
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  border-left: 1px solid rgba(255, 255, 255, 0.05);
}

/* ── Skip link (a11y) ────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent);
  color: #000;
  padding: 8px 16px;
  z-index: 100;
  font-weight: 600;
  transition: top 200ms ease-out;
}

.skip-link:focus {
  top: 0;
}

/* ── Focus-visible styles (a11y) ─────────────────────────── */
:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button:focus-visible {
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.4);
  outline: none;
}

/* ── Reduced motion (a11y) ───────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .react-flow__node {
    transition: none !important;
  }
}

/* ── React Flow overrides ────────────────────────────────── */
.react-flow__node {
  cursor: pointer;
  transition: transform 300ms ease-out;
}

.react-flow__edge-path {
  stroke-width: 2;
}

.react-flow__minimap {
  background-color: var(--bg-secondary);
}

/* Controls styling */
.react-flow__controls {
  background: transparent;
  box-shadow: none;
}

.react-flow__controls-button {
  background-color: #334155;
  border: 1px solid #475569;
  color: #94A3B8;
  border-bottom: 1px solid #475569;
}

.react-flow__controls-button:hover {
  background-color: #475569;
  color: #F8FAFC;
}

.react-flow__controls-button:active {
  background-color: #1E293B;
}

.react-flow__controls-button svg {
  fill: currentColor;
}

/* ── Visually hidden utility (a11y) ──────────────────────── */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}