frontend/src/index.css

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

@layer base {
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root {
    --sidebar-w: 280px;
    --topbar-h: 52px;
    --composer-h: 130px;
    color-scheme: dark;

    /* ── Text opacity scale ──────────────────────────── */
    --text-1: 0.95;
    --text-2: 0.68;
    --text-3: 0.44;
    --text-4: 0.26;
    --text-5: 0.12;

    /* ── Surface colors (warm-tinted darks) ───────────── */
    --surface-0: #0a0a0f;
    --surface-05: #0e0f14;
    --surface-1: rgba(255,255,255,0.035);
    --surface-2: rgba(255,255,255,0.055);
    --surface-3: rgba(255,255,255,0.08);
    --surface-4: rgba(255,255,255,0.11);
    --surface-hover: rgba(255,255,255,0.06);

    /* ── Border colors ────────────────────────────────── */
    --border-0: rgba(255,255,255,0.04);
    --border-1: rgba(255,255,255,0.07);
    --border-2: rgba(255,255,255,0.11);
    --border-3: rgba(255,255,255,0.16);

    /* ── Brand / Accent ───────────────────────────────── */
    --brand: #6366f1;
    --brand-light: #818cf8;
    --brand-dim: rgba(99,102,241,0.12);
    --brand-glow: rgba(99,102,241,0.25);
    --brand-cyan: #06b6d4;
    --brand-violet: #a78bfa;

    /* ── Semantic ──────────────────────────────────────── */
    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;

    /* ── Radius ────────────────────────────────────────── */
    --radius-xs: 6px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* ── Transitions ───────────────────────────────────── */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 150ms;
    --duration-normal: 200ms;
    --duration-slow: 350ms;
  }

  html, body, #root {
    height: 100%;
    width: 100%;
    overflow: hidden;
  }

  body {
    background: var(--surface-0);
    color: rgba(255,255,255,var(--text-1));
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    letter-spacing: -0.006em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  }

  /* ── Scrollbar ─────────────────────────────────────── */
  ::-webkit-scrollbar { width: 5px; height: 5px; }
  ::-webkit-scrollbar-track { background: transparent; }
  ::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.08);
    border-radius: 99px;
  }
  ::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.16); }

  ::selection { background: rgba(99,102,241,0.3); color: #fff; }

  * { scroll-behavior: smooth; }
}

@layer components {
  /* ── Glass surfaces ────────────────────────────────── */
  .glass {
    background: var(--surface-1);
    border: 1px solid var(--border-1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }

  .glass-bright {
    background: var(--surface-2);
    border: 1px solid var(--border-2);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
  }

  .glass-interactive {
    background: var(--surface-1);
    border: 1px solid var(--border-1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all var(--duration-normal) var(--ease-out-expo);
  }
  .glass-interactive:hover {
    background: var(--surface-hover);
    border-color: var(--border-2);
    box-shadow: 0 4px 24px rgba(0,0,0,0.12);
  }

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

  .text-gradient-warm {
    background: linear-gradient(135deg, var(--brand-violet), var(--brand-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  /* ── Status dots ───────────────────────────────────── */
  .dot-online { background: var(--success); box-shadow: 0 0 6px rgba(52,211,153,0.45); }
  .dot-warning { background: var(--warning); box-shadow: 0 0 6px rgba(251,191,36,0.45); }
  .dot-offline { background: var(--danger); box-shadow: 0 0 6px rgba(248,113,113,0.45); }

  /* ── Skeleton shimmer ──────────────────────────────── */
  .skeleton {
    background: linear-gradient(90deg,
      rgba(255,255,255,0.03) 25%,
      rgba(255,255,255,0.07) 50%,
      rgba(255,255,255,0.03) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 2s linear infinite;
    border-radius: var(--radius-sm);
  }

  @keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
  }

  /* ── Pipeline step states ──────────────────────────── */
  .pipeline-step-done { color: var(--success); }
  .pipeline-step-active { color: var(--brand-light); }
  .pipeline-step-pending { color: rgba(255,255,255,var(--text-4)); }

  /* ── Code blocks ───────────────────────────────────── */
  .sql-code pre {
    font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace !important;
    font-size: 12.5px !important;
    line-height: 1.75 !important;
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    overflow-x: auto;
  }

  /* ── Typing cursor ─────────────────────────────────── */
  .typing-cursor::after {
    content: '▋';
    animation: blink 1s step-start infinite;
    color: var(--brand-light);
    margin-left: 1px;
    font-size: 0.85em;
  }

  @keyframes blink {
    50% { opacity: 0; }
  }

  /* ── Focus ring ────────────────────────────────────── */
  .focus-ring:focus-visible {
    outline: 2px solid rgba(99,102,241,0.5);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
  }

  /* ── Gradient orb ──────────────────────────────────── */
  .gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: orbFloat 10s ease-in-out infinite;
  }

  @keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(12px, -18px) scale(1.04); }
    66% { transform: translate(-8px, 8px) scale(0.96); }
  }

  /* ── Animated border glow ──────────────────────────── */
  .border-glow {
    position: relative;
  }
  .border-glow::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, rgba(99,102,241,0.3), rgba(6,182,212,0.25), rgba(167,139,250,0.2));
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: xor;
    -webkit-mask-composite: xor;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--duration-slow) var(--ease-out-expo);
  }
  .border-glow:hover::before,
  .border-glow:focus-within::before {
    opacity: 1;
  }

  /* ── Toast progress ────────────────────────────────── */
  .toast-progress {
    animation: toastCountdown 3.5s linear forwards;
  }
  @keyframes toastCountdown {
    from { width: 100%; }
    to { width: 0%; }
  }

  /* ── Zebra table ───────────────────────────────────── */
  .table-zebra tbody tr:nth-child(even) {
    background: rgba(255,255,255,0.015);
  }
  .table-zebra tbody tr:hover {
    background: rgba(99,102,241,0.04) !important;
  }

  /* ── Sidebar nav item ──────────────────────────────── */
  .nav-item {
    transition: all var(--duration-fast) var(--ease-out-expo);
    border-radius: var(--radius-sm);
  }
  .nav-item:hover {
    background: var(--surface-hover);
  }
  .nav-item.active {
    background: var(--brand-dim);
  }
  .nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 16px;
    border-radius: 2px;
    background: var(--brand-light);
  }

  /* ── Sidebar search ────────────────────────────────── */
  .sidebar-search {
    background: var(--surface-1);
    border: 1px solid var(--border-1);
    border-radius: var(--radius-sm);
    transition: all var(--duration-normal) var(--ease-out-expo);
  }
  .sidebar-search:focus-within {
    border-color: var(--border-2);
    background: var(--surface-2);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.06);
  }

  /* ── Pulse animation for dots ──────────────────────── */
  @keyframes pulse-soft {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
  }
}

@layer utilities {
  .scrollbar-none { scrollbar-width: none; -ms-overflow-style: none; }
  .scrollbar-none::-webkit-scrollbar { display: none; }

  .bg-grid {
    background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cpath d='M0 0h40v1H0zM0 0v40h1V0z' fill='%236366f1' fill-opacity='0.03'/%3E%3C/g%3E%3C/svg%3E");
  }

  .bg-noise {
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.02'/%3E%3C/svg%3E");
  }

  /* ── Text opacity utilities ────────────────────────── */
  .text-t1 { color: rgba(255,255,255,var(--text-1)); }
  .text-t2 { color: rgba(255,255,255,var(--text-2)); }
  .text-t3 { color: rgba(255,255,255,var(--text-3)); }
  .text-t4 { color: rgba(255,255,255,var(--text-4)); }
  .text-t5 { color: rgba(255,255,255,var(--text-5)); }
}