/* ============================================================
   PICHI AI — Base Styles
   Clash Grotesk + Inter · Warm neutrals · Editorial typography
   ============================================================ */

/* Font imports moved to <head> as async preloads for performance */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-loose);
  color: var(--text-primary);
  background-color: var(--bg-default);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, svg, video {
  display: block;
  max-width: 100%;
}

a:not(.btn) {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--dur-normal) var(--ease-default);
}

a:not(.btn):hover {
  color: var(--text-link-hover);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ── Typography: Headings ── */
h1, .h1 {
  font-size: var(--text-h1);
  font-weight: var(--fw-regular);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tighter);
  color: var(--text-primary);
}

h2, .h2 {
  font-size: var(--text-h2);
  font-weight: var(--fw-regular);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: var(--text-primary);
}

h3, .h3 {
  font-size: var(--text-h3);
  font-weight: var(--fw-regular);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-snug);
  color: var(--text-primary);
}

h4, .h4 {
  font-size: var(--text-h4);
  font-weight: var(--fw-medium);
  line-height: var(--lh-normal);
  letter-spacing: var(--ls-slight);
  color: var(--text-primary);
}

h5, .h5 {
  font-size: var(--text-h5);
  font-weight: var(--fw-medium);
  line-height: 26px;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

/* ── Typography: Body ── */
.body-lg {
  font-size: var(--text-body-lg);
  line-height: var(--lh-loose);
  font-weight: var(--fw-regular);
}

.body {
  font-size: var(--text-body);
  line-height: var(--lh-loose);
  font-weight: var(--fw-regular);
}

.body-sm {
  font-size: var(--text-body-sm);
  line-height: var(--lh-relaxed);
  font-weight: var(--fw-regular);
}

/* ── Typography: Labels & Overlines ── */
.label-lg {
  font-size: var(--text-label-lg);
  font-weight: var(--fw-medium);
  line-height: 20px;
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}

.label {
  font-size: var(--text-label);
  font-weight: var(--fw-regular);
  line-height: 18px;
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}

.label-sm {
  font-size: var(--text-label-sm);
  font-weight: var(--fw-medium);
  line-height: 16px;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

.caption {
  font-size: var(--text-caption);
  line-height: 16px;
  font-weight: var(--fw-regular);
  letter-spacing: 0.01em;
}

.overline {
  font-size: var(--text-overline);
  font-weight: var(--fw-semibold);
  line-height: 14px;
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}

/* ── Typography: Metrics ── */
.metric {
  font-size: var(--text-metric);
  font-weight: var(--fw-regular);
  line-height: 1.0;
  letter-spacing: var(--ls-tightest);
  color: var(--text-primary);
}

.metric-sm {
  font-size: var(--text-metric-sm);
  font-weight: var(--fw-regular);
  line-height: 1.0;
  letter-spacing: var(--ls-tighter);
  color: var(--text-primary);
}

/* ── Text color utilities ── */
.text-primary   { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary  { color: var(--text-tertiary); }
.text-muted     { color: var(--text-muted); }
.text-cobalt    { color: var(--color-primary-500); }
.text-amber     { color: var(--color-amber-500); }
.text-green     { color: var(--color-green-500); }
.text-inverse   { color: var(--text-inverse); }

/* ── Layout ── */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: var(--page-gutter);
  padding-right: var(--page-gutter);
}

.container--narrow {
  max-width: 860px;
}

.container--wide {
  max-width: 1440px;
}

.section {
  padding-top: var(--section-padding-v);
  padding-bottom: var(--section-padding-v);
}

.section--sm {
  padding-top: clamp(40px, 5vw, 72px);
  padding-bottom: clamp(40px, 5vw, 72px);
}

/* ── Grid ── */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--card-gap);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--card-gap);
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

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

/* ── Divider ── */
hr, .divider {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: 0;
}

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