/* ==========================================================================
   core.css — Chedders Bootstrap Core DNA
   Global resets · Typography · Layout foundation
   ========================================================================== */

/* --------------------------------------------------------------------------
   Font Import
   -------------------------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

/* --------------------------------------------------------------------------
   Base Reset & Box Model
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', 'Plus Jakarta Sans', 'Manrope', system-ui, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--background);
  transition: background-color 0.25s ease, color 0.25s ease;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --------------------------------------------------------------------------
   Typography Scale
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', 'Plus Jakarta Sans', system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

h1 { font-size: clamp(28px, 4vw, 40px); }
h2 { font-size: clamp(22px, 3vw, 28px); }
h3 { font-size: clamp(18px, 2.5vw, 22px); font-weight: 600; }
h4 { font-size: 18px; font-weight: 600; }
h5 { font-size: 16px; font-weight: 600; }
h6 { font-size: 14px; font-weight: 600; }

p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover { color: var(--primary-light); }

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  padding-left: 1.25rem;
}

/* --------------------------------------------------------------------------
   Selection
   -------------------------------------------------------------------------- */
::selection {
  background: var(--primary);
  color: #fff;
}

/* --------------------------------------------------------------------------
   Focus Accessibility
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   Scrollbar (Webkit)
   -------------------------------------------------------------------------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* --------------------------------------------------------------------------
   Code
   -------------------------------------------------------------------------- */
code, pre {
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 13px;
  background-color: var(--code-bg);
  border-radius: 4px;
}

code { padding: 2px 6px; }
pre { padding: 16px; overflow-x: auto; }