/* ============================================================
   ToolsPack — Base (Reset + Typography + Layout Primitives)
   ============================================================ */

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;            /* 17px */
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-std), color var(--transition-std);
}

img, svg, video { display: block; max-width: 100%; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

ul, ol { list-style: none; }

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

/* ── Reduced Motion ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Typography Scale ─────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.15;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 5vw, 3rem);   letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1875rem, 2vw, 1.375rem); }
h4 { font-size: 1.0625rem; }

p { max-width: 68ch; }

small, .text-sm {
  font-size: 0.8125rem; /* 13px */
  color: var(--color-text-muted);
}

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.875rem; /* ~14px */
  line-height: 1.5;
}

pre {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-16);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ── Layout Utilities ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--space-24);
}

@media (min-width: 1024px) {
  .container { padding-inline: var(--space-40); }
}

.section { padding-block: var(--space-56); }
@media (min-width: 768px) { .section { padding-block: var(--space-96); } }

.section-header { margin-bottom: var(--space-40); }
.section-header h2 { margin-bottom: var(--space-8); }

/* ── Main content wrapper ────────────────────────────────────── */
main {
  min-height: calc(100vh - var(--header-height) - 280px);
  padding-top: var(--header-height); /* offset for sticky header */
}

/* ── Grid ───────────────────────────────────────────────────── */
.grid-2 { display: grid; gap: var(--space-24); grid-template-columns: 1fr; }
.grid-3 { display: grid; gap: var(--space-24); grid-template-columns: 1fr; }
.grid-4 { display: grid; gap: var(--space-24); grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ── Flex utilities ─────────────────────────────────────────── */
.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col     { display: flex; flex-direction: column; }
.gap-8        { gap: var(--space-8); }
.gap-16       { gap: var(--space-16); }
.gap-24       { gap: var(--space-24); }

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

/* ── Text utilities ─────────────────────────────────────────── */
.text-muted   { color: var(--color-text-muted); }
.text-accent  { color: var(--color-accent); }
.text-center  { text-align: center; }
.text-balance { text-wrap: balance; }
.truncate-2   { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ── Divider ────────────────────────────────────────────────── */
hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: var(--space-40);
}

/* ── Focus ring (accessibility) ─────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

/* ── Breadcrumb ─────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-24);
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb-sep { opacity: 0.5; }

/* ── Category badge pill ─────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  white-space: nowrap;
}

.badge-accent {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

/* ── Eyebrow label ───────────────────────────────────────────── */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-8);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}