/*
  Zero Noise - Shared design system for static pages
  Same tokens as the React app: warm cream · printer ink · phosphor green · caution amber
*/

@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Instrument+Serif:ital@0;1&family=Inter+Tight:wght@400;500;600;700&display=swap");

/* Tokens */
:root {
  --paper: oklch(0.965 0.012 86);
  --paper-deep: oklch(0.93 0.018 86);
  --ink: oklch(0.18 0.01 60);
  --ink-soft: oklch(0.32 0.01 60);
  --phosphor: oklch(0.78 0.18 156);
  --phosphor-deep: oklch(0.62 0.2 156);
  --amber: oklch(0.78 0.16 70);
  --rule: oklch(0.18 0.01 60 / 0.15);

  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --font-sans: "Inter Tight", "Inter", system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-image:
    radial-gradient(transparent 1px, var(--paper) 1px),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.06  0 0 0 0 0.05  0 0 0 0 0.04  0 0 0 0.045 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size:
    4px 4px,
    160px 160px;
}

a {
  color: inherit;
  text-decoration: none;
}
::selection {
  background: var(--phosphor);
  color: var(--ink);
}

/* Layout */
.container {
  width: 100%;
  max-width: 1440px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}
@media (min-width: 640px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}
@media (min-width: 1024px) {
  .container {
    padding-left: 3rem;
    padding-right: 3rem;
  }
}

/* Typography */
.editorial-xl {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(3rem, 8vw, 7rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
}
.editorial-lg {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2rem, 4.5vw, 4rem);
  line-height: 1;
  letter-spacing: -0.015em;
}
.editorial-md {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.5rem, 2.5vw, 2.5rem);
  line-height: 1.1;
}
.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* Top status bar */
.zn-topbar {
  border-bottom: 1px solid var(--rule);
  padding: 0.5rem 0;
}
.zn-topbar .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.zn-topbar .live {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.zn-topbar .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--phosphor);
  box-shadow: 0 0 8px rgba(61, 214, 140, 0.7);
}

/* Nav */
.zn-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in oklab, var(--paper) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}
.zn-nav .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.zn-nav .logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
}
.zn-nav .logo em {
  font-style: italic;
}
.zn-nav .logo .tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.zn-nav .links {
  display: none;
  align-items: center;
  gap: 2rem;
  list-style: none;
}
@media (min-width: 900px) {
  .zn-nav .links {
    display: flex;
  }
}
.zn-nav .links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  transition: color 0.2s;
}
.zn-nav .links a:hover {
  color: var(--ink);
}

/* Buttons */
.btn-phosphor {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.3rem;
  background: var(--ink);
  color: var(--phosphor);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition:
    transform 0.18s ease,
    box-shadow 0.25s ease,
    color 0.25s ease;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}
.btn-phosphor:hover {
  transform: translateY(-1px);
  color: #fff;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.1),
    0 0 0 6px rgba(61, 214, 140, 0.18),
    0 14px 30px -10px rgba(0, 0, 0, 0.35);
}
.btn-phosphor .led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--phosphor);
  box-shadow:
    0 0 0 3px rgba(61, 214, 140, 0.18),
    0 0 12px rgba(61, 214, 140, 0.65);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.2rem;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  transition:
    background 0.2s,
    color 0.2s;
}
.btn-outline:hover {
  background: var(--ink);
  color: var(--paper);
}

/* Serial section label */
.serial {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 2.5rem;
}
.serial::before,
.serial::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--rule), transparent);
}

/* Receipt card */
.receipt {
  position: relative;
  background: var(--paper);
  color: var(--ink);
  padding: 1.6rem 1.6rem 2rem;
  font-family: var(--font-mono);
  box-shadow:
    0 1px 0 0 rgba(0, 0, 0, 0.06),
    0 18px 40px -28px rgba(0, 0, 0, 0.3),
    0 60px 80px -60px rgba(0, 0, 0, 0.18);
}
.receipt::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 10px;
  background: radial-gradient(
      circle at 6px 0,
      transparent 4px,
      var(--paper) 4.5px
    )
    repeat-x;
  background-size: 12px 10px;
}
.receipt::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 10px;
  background: radial-gradient(
      circle at 6px 10px,
      transparent 4px,
      var(--paper) 4.5px
    )
    repeat-x;
  background-size: 12px 10px;
}
.receipt-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.18);
  padding: 0.55rem 0;
}
.receipt-row:last-of-type {
  border-bottom: none;
}
.receipt-total {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-serif);
  font-size: 1.6rem;
  border-top: 2px solid var(--ink);
  border-bottom: 2px double var(--ink);
  padding: 0.85rem 0;
  margin-top: 0.4rem;
}

/* Terminal */
.terminal {
  position: relative;
  background: #0e120f;
  color: #d6e5da;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.65;
  padding: 1.5rem;
  border: 1px solid #1f2a22;
  border-radius: 8px;
  box-shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.45);
  overflow: auto;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.85rem;
  background: #161b17;
  border-bottom: 1px solid #222b25;
  border-radius: 8px 8px 0 0;
  margin: -1.5rem -1.5rem 1rem;
}
.terminal-bar .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.terminal-bar .dot.r {
  background: #ed6a5e;
}
.terminal-bar .dot.y {
  background: #f5bf4f;
}
.terminal-bar .dot.g {
  background: #61c554;
}
.terminal-bar .title {
  margin-left: 0.5rem;
  font-size: 0.68rem;
  color: #8a9a8e;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.term-prompt {
  color: #6cc79a;
}
.term-mute {
  color: #6e8678;
}
.term-warn {
  color: #f2a93b;
}
.term-ok {
  color: #3dd68c;
}

/* Caution tape */
.caution-tape {
  height: 22px;
  background: repeating-linear-gradient(
    135deg,
    var(--amber) 0 22px,
    var(--ink) 22px 36px
  );
}

/* Ink mark highlight */
.ink-mark {
  position: relative;
  display: inline-block;
}
.ink-mark::after {
  content: "";
  position: absolute;
  left: -2%;
  right: -2%;
  bottom: 0.06em;
  height: 0.42em;
  background: var(--phosphor);
  z-index: -1;
  transform: skewY(-1.5deg);
  opacity: 0.9;
}

/* Page header */
.page-header {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 4rem;
}
.page-header .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 1rem;
}

/* Prose */
.prose {
  max-width: 68ch;
  font-size: 1.05rem;
  line-height: 1.78;
  color: var(--ink);
}
.prose h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 400;
  line-height: 1.15;
  margin: 2.5rem 0 0.9rem;
}
.prose h3 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 2rem 0 0.6rem;
}
.prose p {
  margin-bottom: 1.4rem;
}
.prose strong {
  font-weight: 600;
}
.prose em {
  font-style: italic;
}
.prose a {
  color: var(--phosphor-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(61, 214, 140, 0.4);
}
.prose a:hover {
  text-decoration-color: var(--phosphor-deep);
}
.prose ul,
.prose ol {
  margin: 0.8rem 0 1.4rem 1.4rem;
}
.prose li {
  margin-bottom: 0.4rem;
}
.prose blockquote {
  border-left: 3px solid var(--phosphor-deep);
  padding-left: 1.2rem;
  margin: 1.6rem 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
}
.prose hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 2rem 0;
}
.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  padding: 0.1em 0.4em;
  border-radius: 3px;
}

/* Card */
.card {
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 1.5rem;
}

/* Tag badge */
.tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
}

/* Footer */
.zn-footer {
  background: var(--ink);
  color: var(--paper);
  margin-top: 6rem;
  padding: 3.5rem 0 2rem;
}
.zn-footer .grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}
@media (min-width: 768px) {
  .zn-footer .grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}
.zn-footer .logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--paper);
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.zn-footer .logo em {
  font-style: italic;
}
.zn-footer .logo .tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--paper) 45%, transparent);
}
.zn-footer .tagline {
  font-size: 0.9rem;
  color: color-mix(in oklab, var(--paper) 65%, transparent);
  line-height: 1.6;
  max-width: 30ch;
  margin-bottom: 1.2rem;
}
.zn-footer .contact {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: color-mix(in oklab, var(--paper) 55%, transparent);
}
.zn-footer .contact a {
  color: color-mix(in oklab, var(--paper) 65%, transparent);
}
.zn-footer .contact a:hover {
  color: var(--phosphor);
}
.zn-footer .col-head {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--paper) 40%, transparent);
  margin-bottom: 1rem;
}
.zn-footer .col-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.zn-footer .col-links a {
  font-size: 0.88rem;
  color: color-mix(in oklab, var(--paper) 65%, transparent);
  transition: color 0.2s;
}
.zn-footer .col-links a:hover {
  color: var(--phosphor);
}
.zn-footer .bottom {
  border-top: 1px solid color-mix(in oklab, var(--paper) 12%, transparent);
  padding-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--paper) 35%, transparent);
}

/* Utilities */
.text-phosphor {
  color: var(--phosphor-deep);
}
.text-amber {
  color: var(--amber);
}
.text-soft {
  color: var(--ink-soft);
}
.font-serif {
  font-family: var(--font-serif);
}
.font-mono {
  font-family: var(--font-mono);
}
.italic {
  font-style: italic;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}