@import url("https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..900;1,9..144,300..900&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap");

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

@layer base {
  :root {
    color-scheme: light;
  }
  html,
  body {
    background: #f5f0e6;
    color: #1e3a8a;
    font-family: "Inter", "Söhne", system-ui, -apple-system, sans-serif;
    font-feature-settings: "ss01", "cv11";
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
  }
  /* Paper grain — fibrous noise, warm brown tint, multiply */
  body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='320' height='320'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.78' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.12 0 0 0 0 0.1 0 0 0 0 0.08 0 0 0 0.7 0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.32'/></svg>");
    mix-blend-mode: multiply;
    opacity: 0.6;
  }
  #root {
    position: relative;
    z-index: 1;
    min-height: 100vh;
  }
  h1,
  h2,
  h3,
  h4 {
    font-family: "Fraunces", "GT Sectra", Georgia, serif;
    font-weight: 500;
    letter-spacing: -0.01em;
  }
  code,
  pre,
  .mono {
    font-family: "JetBrains Mono", "Berkeley Mono", ui-monospace, monospace;
  }
  /* Selection: modern blue ink on paper */
  ::selection {
    background: #1d4ed8;
    color: #f5f0e6;
  }
}

@layer utilities {
  /* Thin ruled line — evokes paper stationery */
  .rule {
    border-bottom: 1px solid #dcd3be;
  }
  .rule-strong {
    border-bottom: 1px solid #1e3a8a;
  }
  /* Envelope: subtle diagonal flap hint used on panels */
  .paper-panel {
    background: #f5f0e6;
    border: 1px solid #dcd3be;
    box-shadow:
      0 1px 0 rgba(26, 23, 20, 0.04),
      0 1px 3px rgba(26, 23, 20, 0.06);
  }
  .paper-panel-deep {
    background: #ebe4d4;
    border: 1px solid #dcd3be;
  }
}