/* ON1 / tools — "library card catalog" aesthetic.
   Kraft-paper drawer cards, hand-stamped serial numbers, Dewey-style
   call numbers derived from biniz idx. Marketing-grade landing for
   the biniz library; 18th distinct flavor across the project.

   Color palette inspired by faded card-catalog cards, brass drawer
   pulls, and rubber-stamp ink. WCAG AA verified on body text
   (#2a1d10 on #f3e6cf = 9.8:1, easily clears 4.5:1).
*/

:root {
  /* Paper / kraft tones */
  --paper:        #f3e6cf;   /* manila card */
  --paper-deep:   #e7d4b3;   /* sun-faded edge */
  --paper-shade:  #d8c19a;   /* drawer felt */
  --paper-rule:   #b59a6e;   /* faint ruled line */

  /* Ink tones */
  --ink:          #2a1d10;   /* typewriter ink, body text */
  --ink-stamp:    #7a2b1a;   /* rubber stamp red-brown */
  --ink-faded:    #6b4c2a;   /* aged annotation */
  --ink-pencil:   #4a3a26;   /* graphite */

  /* Accent */
  --brass:        #b58a3a;   /* drawer-pull brass */
  --brass-dark:   #8a652a;
  --tag-bg:       #e3cf9f;   /* string-tag color */
  --tag-bg-hot:   #d7b46a;   /* highlighted tag */

  /* Dark backdrop behind the cards (mahogany cabinet) */
  --cabinet:      #1f1305;
  --cabinet-soft: #2a1a09;

  /* Type */
  --f-mono:    "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --f-sans:    "Familjen Grotesk", ui-sans-serif, system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --f-display: "Chakra Petch", "IBM Plex Mono", monospace;

  /* Geometry */
  --radius-card: 3px;     /* card-stock has minimal rounding */
  --radius-chip: 999px;
  --shadow-card: 0 1px 0 rgba(0,0,0,0.04), 0 6px 18px -10px rgba(31,19,5,0.35);
  --shadow-stack: 0 1px 0 rgba(0,0,0,0.06),
                  0 4px 0 -2px var(--paper-deep),
                  0 8px 0 -4px var(--paper-shade),
                  0 12px 28px -12px rgba(31,19,5,0.4);

  --bp-mobile-max: 540px;
  --bp-tablet-max: 1023px;
}

/* ---------- BASE ---------- */

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--cabinet);
  color: var(--ink);
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* mahogany-grain backdrop, subtle, no-image */
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(122, 73, 23, 0.18), transparent 55%),
    radial-gradient(ellipse at 80% 100%, rgba(60, 30, 8, 0.4), transparent 60%),
    repeating-linear-gradient(180deg,
      var(--cabinet) 0,
      var(--cabinet) 28px,
      var(--cabinet-soft) 29px,
      var(--cabinet-soft) 30px);
  min-height: 100vh;
  overflow-x: hidden;
}

.grain {
  pointer-events: none;
  position: fixed; inset: 0;
  z-index: 0;
  opacity: 0.45;
  /* paper-grain via stacked tiny gradients */
  background-image:
    repeating-radial-gradient(circle at 7% 13%, rgba(255,255,255,0.025) 0 0.5px, transparent 0.5px 4px),
    repeating-radial-gradient(circle at 47% 67%, rgba(0,0,0,0.025) 0 0.5px, transparent 0.5px 5px);
  mix-blend-mode: overlay;
}

a {
  color: var(--brass);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover, a:focus-visible {
  color: var(--ink-stamp);
  outline: none;
}
a:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- NAV ---------- */

.topnav {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 18px 28px;
  border-bottom: 1px solid rgba(181, 138, 58, 0.25);
  background: rgba(31, 19, 5, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
  text-decoration: none;
  font-family: var(--f-mono);
  font-size: 0.92rem;
  letter-spacing: 0.05em;
}
.logo:hover .logo-text { color: var(--brass); }

.logo-card {
  position: relative;
  width: 26px; height: 18px;
  background: var(--paper);
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(122, 73, 23, 0.5),
              0 2px 0 -1px var(--paper-deep),
              0 4px 0 -2px var(--paper-shade);
}
.logo-card-hole {
  position: absolute;
  bottom: 2px; left: 50%;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--cabinet);
  transform: translateX(-50%);
}
.logo-text { color: var(--paper); transition: color 120ms ease; }

.topnav-links {
  display: flex;
  gap: 1.25rem;
  margin-left: auto;
  flex-wrap: wrap;
}
.topnav-links a {
  color: var(--paper-deep);
  text-decoration: none;
  font-family: var(--f-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}
.topnav-links a:hover, .topnav-links a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--brass);
}

/* ---------- MAIN ---------- */

main {
  position: relative;
  z-index: 1;
  padding: 32px 24px 40px;
  max-width: 1240px;
  margin: 0 auto;
}

/* ---------- HERO (looks like a master index card) ---------- */

.hero {
  background: var(--paper);
  border-radius: var(--radius-card);
  padding: 40px 36px 32px;
  margin-bottom: 36px;
  position: relative;
  box-shadow: var(--shadow-stack);
  /* faint ruled lines */
  background-image:
    linear-gradient(to right, transparent 0, transparent 60px,
                              rgba(181, 138, 58, 0.18) 60px,
                              rgba(181, 138, 58, 0.18) 61px,
                              transparent 61px),
    repeating-linear-gradient(180deg,
      transparent 0, transparent 30px,
      rgba(122, 92, 50, 0.08) 30px,
      rgba(122, 92, 50, 0.08) 31px);
}

.hero::before {
  /* punched hole at the bottom-center, like a Hollerith card */
  content: "";
  position: absolute;
  bottom: 10px; left: 50%;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--cabinet);
  transform: translateX(-50%);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.6);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 8px;
}
.card-stamp {
  font-family: var(--f-mono);
  font-size: 0.72rem;
  color: var(--ink-stamp);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: 1.5px solid var(--ink-stamp);
  padding: 4px 8px;
  border-radius: 2px;
  /* rubber-stamp wobble */
  transform: rotate(-1deg);
  display: inline-block;
}
.card-meta {
  font-family: var(--f-mono);
  font-size: 0.72rem;
  color: var(--ink-faded);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  line-height: 1.05;
  color: var(--ink);
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

.hero-lede {
  font-family: var(--f-sans);
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
  line-height: 1.65;
  color: var(--ink);
  margin: 0 0 14px;
  max-width: 60ch;
}
.hero-lede em {
  font-style: italic;
  color: var(--ink-stamp);
  font-weight: 600;
  font-family: var(--f-sans);
}
.hero-lede strong {
  font-weight: 700;
  color: var(--ink);
}

.hero-sub {
  font-family: var(--f-mono);
  font-size: 0.9rem;
  color: var(--ink-pencil);
  margin: 0 0 24px;
  max-width: 60ch;
}
.hero-sub a, .hero-link {
  color: var(--brass-dark);
  font-weight: 600;
}

.hero-stamps {
  display: flex;
  gap: 8px 12px;
  flex-wrap: wrap;
}
.stamp {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-stamp);
  border: 1.2px dashed var(--ink-stamp);
  padding: 4px 9px;
  border-radius: 2px;
  transform: rotate(calc((var(--seed, 0) * 1) - 1deg));
  background: rgba(243, 230, 207, 0.6);
}
.stamp:nth-child(2) { transform: rotate(0.8deg); }
.stamp:nth-child(3) { transform: rotate(-0.6deg); }
.stamp:nth-child(4) { transform: rotate(1.2deg); }
.stamp:nth-child(5) { transform: rotate(-1.1deg); }

/* ---------- FILTERBAR ---------- */

.filterbar {
  background: var(--paper-deep);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-card);
}
.filter-label {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  color: var(--ink-faded);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip {
  font-family: var(--f-mono);
  font-size: 0.82rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--paper-rule);
  border-radius: var(--radius-chip);
  padding: 6px 14px;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, transform 120ms ease;
  white-space: nowrap;
}
.chip:hover, .chip:focus-visible {
  background: var(--tag-bg);
  outline: none;
  transform: translateY(-1px);
}
.chip.is-active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.chip-count {
  display: inline-block;
  margin-left: 6px;
  font-size: 0.7rem;
  color: var(--ink-faded);
  font-variant-numeric: tabular-nums;
}
.chip.is-active .chip-count { color: var(--paper-deep); }

/* ---------- CATALOG GRID ---------- */

.catalog {
  margin-bottom: 48px;
}
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 22px;
  align-items: stretch;
}
.loading-state {
  font-family: var(--f-mono);
  color: var(--paper-deep);
  text-align: center;
  padding: 40px;
  grid-column: 1 / -1;
}

/* CARD: looks like a manila card-catalog drawer card */
.card {
  background: var(--paper);
  border-radius: var(--radius-card);
  padding: 22px 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  box-shadow: var(--shadow-card);
  /* punched rule + horizontal lines */
  background-image:
    linear-gradient(to right, transparent 0, transparent 32px,
      rgba(181, 138, 58, 0.32) 32px,
      rgba(181, 138, 58, 0.32) 33px,
      transparent 33px),
    repeating-linear-gradient(180deg,
      transparent 0, transparent 28px,
      rgba(122, 92, 50, 0.085) 28px,
      rgba(122, 92, 50, 0.085) 29px);
  transition: transform 160ms ease, box-shadow 160ms ease;
  break-inside: avoid;
}
.card:hover {
  transform: translateY(-2px) rotate(-0.2deg);
  box-shadow: 0 1px 0 rgba(0,0,0,0.04),
              0 14px 26px -12px rgba(31,19,5,0.55);
}
.card::after {
  /* punched hole at bottom */
  content: "";
  position: absolute;
  bottom: 8px; left: 50%;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--cabinet);
  opacity: 0.6;
  transform: translateX(-50%);
}

.card-call {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--f-mono);
  font-size: 0.74rem;
  color: var(--ink-faded);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid rgba(181, 138, 58, 0.4);
  padding-bottom: 8px;
  margin-bottom: 4px;
}
.card-callnum {
  font-weight: 600;
  color: var(--ink-stamp);
  font-variant-numeric: tabular-nums;
}
.card-cat {
  color: var(--ink-pencil);
}

.card-title {
  font-family: var(--f-mono);
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
  line-height: 1.25;
}

.card-pitch {
  font-family: var(--f-sans);
  font-size: 0.96rem;
  color: var(--ink);
  margin: 0;
  line-height: 1.55;
}

.card-uses {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}
.card-uses li {
  font-family: var(--f-sans);
  font-size: 0.86rem;
  color: var(--ink-pencil);
  padding: 2px 0 2px 18px;
  position: relative;
  line-height: 1.45;
}
.card-uses li::before {
  content: "›";
  position: absolute;
  left: 4px; top: 1px;
  color: var(--brass-dark);
  font-weight: 700;
  font-family: var(--f-mono);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 7px;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed rgba(181, 138, 58, 0.45);
}
.card-tag {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  background: var(--tag-bg);
  color: var(--ink);
  padding: 3px 8px;
  border-radius: 2px;
  letter-spacing: 0.04em;
}
.card-tag.is-hot {
  background: var(--tag-bg-hot);
  color: var(--ink);
  font-weight: 600;
}

/* ---------- RECIPES (composition examples) ---------- */

.recipes {
  background: var(--paper);
  border-radius: var(--radius-card);
  padding: 32px 32px 28px;
  margin-bottom: 36px;
  box-shadow: var(--shadow-stack);
  background-image:
    repeating-linear-gradient(180deg,
      transparent 0, transparent 30px,
      rgba(122, 92, 50, 0.06) 30px,
      rgba(122, 92, 50, 0.06) 31px);
}

.recipes-header {
  margin-bottom: 22px;
}
.recipes-header .card-stamp {
  margin-bottom: 12px;
}
.recipes-header h2 {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  color: var(--ink);
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}
.recipes-lede {
  font-family: var(--f-sans);
  color: var(--ink);
  margin: 0;
  max-width: 60ch;
  font-size: 1.02rem;
}

.recipes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 20px;
  margin-top: 18px;
}

.recipe {
  background: var(--paper-deep);
  border-radius: var(--radius-card);
  padding: 18px 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-left: 4px solid var(--brass);
}
.recipe-name {
  font-family: var(--f-display);
  font-size: 1.3rem;
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.01em;
}
.recipe-desc {
  font-family: var(--f-sans);
  font-size: 0.92rem;
  color: var(--ink);
  margin: 0;
  line-height: 1.5;
}
.recipe-components {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  color: var(--ink-pencil);
  margin: 0;
  padding-top: 8px;
  border-top: 1px dashed rgba(122, 92, 50, 0.4);
}
.recipe-components strong {
  color: var(--ink-stamp);
  font-weight: 600;
}

/* ---------- CTA ---------- */

.cta {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-card);
  padding: 40px 32px;
  text-align: center;
  margin-bottom: 36px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  top: -40px; right: -40px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, var(--brass) 0%, transparent 60%);
  opacity: 0.2;
  pointer-events: none;
}
.cta-title {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--paper);
  margin: 0 0 14px;
}
.cta-lede {
  font-family: var(--f-sans);
  color: var(--paper-deep);
  font-size: 1.05rem;
  max-width: 52ch;
  margin: 0 auto 24px;
  line-height: 1.55;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--brass);
  color: var(--ink);
  font-family: var(--f-mono);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 14px 24px;
  border-radius: 2px;
  text-decoration: none;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: background 120ms ease, transform 120ms ease;
}
.cta-btn:hover, .cta-btn:focus-visible {
  background: var(--paper);
  color: var(--ink);
  transform: translateY(-1px);
  outline: none;
}
.cta-btn-arrow {
  font-family: var(--f-mono);
  font-size: 1.1rem;
}
.cta-sub {
  font-family: var(--f-mono);
  font-size: 0.85rem;
  color: var(--paper-deep);
  margin: 18px 0 0;
}
.cta-sub a { color: var(--brass); }

/* ---------- FOOTER ---------- */

.footer {
  position: relative;
  z-index: 1;
  padding: 0 24px 40px;
  max-width: 1240px;
  margin: 0 auto;
}
.footer-card {
  background: var(--paper-deep);
  border-radius: var(--radius-card);
  padding: 22px 26px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-card .card-stamp {
  align-self: flex-start;
}
.footer-text {
  font-family: var(--f-sans);
  font-size: 0.9rem;
  color: var(--ink);
  margin: 0;
  max-width: 80ch;
  line-height: 1.55;
}
.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--ink-pencil);
  text-decoration: none;
  font-family: var(--f-mono);
  font-size: 0.85rem;
  border-bottom: 1px solid transparent;
}
.footer-links a:hover, .footer-links a:focus-visible {
  color: var(--ink-stamp);
  border-bottom-color: var(--ink-stamp);
}

/* ---------- RESPONSIVE ---------- */

@media (max-width: 1023px) {
  main { padding: 24px 18px 32px; }
  .footer { padding: 0 18px 32px; }
}

@media (max-width: 720px) {
  .topnav {
    padding: 14px 18px;
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  .topnav-links { gap: 0.8rem; margin-left: 0; width: 100%; order: 3; }
  .topnav-links a { font-size: 0.78rem; }
  .hero { padding: 28px 22px 24px; }
  .hero-title { font-size: clamp(1.85rem, 8vw, 2.4rem); }
  .filterbar { padding: 14px; gap: 10px; }
  .catalog-grid { gap: 16px; }
  .recipes { padding: 24px 22px 20px; }
  .cta { padding: 32px 22px; }
}

@media (max-width: 540px) {
  body { font-size: 15px; }
  .hero { padding: 22px 18px 22px; }
  .hero-title { font-size: clamp(1.6rem, 10vw, 2.1rem); line-height: 1.1; }
  .hero-lede { font-size: 1rem; }
  .card { padding: 18px 16px 16px; }
  .card-title { font-size: 1rem; }
  .cta-btn { padding: 12px 18px; font-size: 0.88rem; }
}

@media (max-width: 360px) {
  .hero-title { font-size: 1.5rem; }
  .stamp { font-size: 0.65rem; padding: 3px 7px; }
  .filter-chips { gap: 6px; }
  .chip { padding: 5px 10px; font-size: 0.78rem; }
}

/* ---------- REDUCED MOTION ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
  }
  .card:hover { transform: none; }
  .stamp { transform: none; }
}

/* ---------- PRINT (sales sheet) ---------- */

@media print {
  body {
    background: white !important;
    color: black !important;
    background-image: none !important;
  }
  .grain, .topnav, .filterbar, .cta, .footer { display: none !important; }
  main { padding: 0; max-width: none; margin: 0; }
  .hero, .recipes {
    background: white !important;
    box-shadow: none !important;
    border: 1px solid #999;
    page-break-after: avoid;
    background-image: none !important;
  }
  .card {
    background: white !important;
    box-shadow: none !important;
    border: 1px solid #999;
    background-image: none !important;
    page-break-inside: avoid;
  }
  .card::after, .hero::before { display: none; }
  .catalog-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .card-stamp {
    border-color: black;
    color: black;
    transform: none;
  }
  a { color: black; text-decoration: underline; }
  .hero-title, .cta-title, .recipes-header h2 { color: black; }
}