/* ==========================================================================
   PAPIERRETTER BRAND STYLES — v1
   Drop-in stylesheet for any subdomain (papier., tools., popup., riso.).
   Portable: works without Tailwind, without a build step.
   Fonts via fonts.bunny.net (GDPR-friendly, no consent banner needed).
   ========================================================================== */

@import url("https://fonts.bunny.net/css?family=space-grotesk:400,500,600,700|instrument-serif:400,400i|jetbrains-mono:400,500&display=swap");

/* --- Design Tokens ------------------------------------------------------- */
:root {
  --pr-paper:   oklch(0.975 0.012 90);
  --pr-cream:   oklch(0.95  0.02  88);
  --pr-ink:     oklch(0.14  0.01  60);
  --pr-magenta: oklch(0.65  0.38  348);
  --pr-acid:    oklch(0.96  0.28  118);
  --pr-rule:    oklch(0.14  0.01  60);
  --pr-muted:   oklch(0.92  0.015 88);

  /* Font families */
  --pr-font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --pr-font-serif:   "Instrument Serif", ui-serif, Georgia, serif;
  --pr-font-mono:    "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  /* Legacy fallbacks for browsers without oklch */
  --pr-paper-fallback:   #f8f5ee;
  --pr-cream-fallback:   #f3ede0;
  --pr-ink-fallback:     #1a1712;
  --pr-magenta-fallback: #ff0f7b;
  --pr-acid-fallback:    #f0ff3d;
}

@supports not (color: oklch(0 0 0)) {
  :root {
    --pr-paper:   var(--pr-paper-fallback);
    --pr-cream:   var(--pr-cream-fallback);
    --pr-ink:     var(--pr-ink-fallback);
    --pr-magenta: var(--pr-magenta-fallback);
    --pr-acid:    var(--pr-acid-fallback);
  }
}

/* --- Base ---------------------------------------------------------------- */
.pr-brand,
.pr-brand * { box-sizing: border-box; }

.pr-brand {
  font-family: var(--pr-font-display);
  font-feature-settings: "ss01", "ss02";
  color: var(--pr-ink);
  background: var(--pr-paper);
  -webkit-font-smoothing: antialiased;
}

.pr-brand ::selection {
  background: var(--pr-magenta);
  color: var(--pr-paper);
}

/* --- Typography utilities ----------------------------------------------- */
.pr-display {
  font-family: var(--pr-font-display);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 0.88;
  text-transform: uppercase;
}
.pr-serif {
  font-family: var(--pr-font-serif);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 0.92;
}
.pr-mono {
  font-family: var(--pr-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* --- Header ------------------------------------------------------------- */
.pr-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in oklab, var(--pr-paper) 85%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid color-mix(in oklab, var(--pr-ink) 15%, transparent);
}
.pr-header__inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
@media (min-width: 768px) {
  .pr-header__inner { padding: 1rem 2.5rem; }
}
.pr-header__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  text-decoration: none;
  color: inherit;
}
.pr-header__logo img { height: 24px; width: auto; display: block; }
@media (min-width: 768px) {
  .pr-header__logo img { height: 28px; }
}

.pr-nav {
  display: none;
  align-items: center;
  gap: 1.5rem;
  min-width: 0;
}
@media (min-width: 1024px) {
  .pr-nav { display: flex; }
}
.pr-nav a {
  font-family: var(--pr-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--pr-ink);
  text-decoration: none;
  transition: color 160ms ease;
}
.pr-nav a:hover,
.pr-nav a[aria-current="page"] { color: var(--pr-magenta); }

.pr-header__cta {
  font-family: var(--pr-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--pr-magenta);
  color: var(--pr-paper);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  text-decoration: none;
  white-space: nowrap;
  transition: background 160ms ease;
}
.pr-header__cta:hover { background: var(--pr-ink); }

.pr-header__menu-btn {
  display: inline-flex;
  align-items: center;
  font-family: var(--pr-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid color-mix(in oklab, var(--pr-ink) 30%, transparent);
  border-radius: 9999px;
  padding: 0.5rem 0.75rem;
  background: transparent;
  color: var(--pr-ink);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease;
}
.pr-header__menu-btn:hover { background: var(--pr-ink); color: var(--pr-paper); }
@media (min-width: 1024px) {
  .pr-header__menu-btn { display: none; }
}

.pr-mobile-nav {
  display: none;
  border-top: 1px solid color-mix(in oklab, var(--pr-ink) 15%, transparent);
  background: var(--pr-paper);
}
.pr-mobile-nav[data-open="true"] { display: block; }
.pr-mobile-nav__inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.pr-mobile-nav a {
  font-family: var(--pr-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--pr-ink);
  text-decoration: none;
  padding: 0.5rem 0;
}
.pr-mobile-nav a:hover { color: var(--pr-magenta); }

/* --- Footer ------------------------------------------------------------- */
.pr-footer {
  border-top: 1px solid color-mix(in oklab, var(--pr-ink) 15%, transparent);
  background: var(--pr-paper);
  color: var(--pr-ink);
  padding: 2rem 1rem;
  font-family: var(--pr-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.pr-footer__inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}
.pr-footer a { color: inherit; text-decoration: none; }
.pr-footer a:hover { color: var(--pr-magenta); }