/* Carbon Chain Code — design system: "The Manifest"
   Built around the real paperwork of manufacturing trade — customs
   declarations, inspection stamps, shipping manifests — instead of the
   generic green/SaaS look every sustainability brand defaults to. */

:root {
  /* blueprint frame (header / hero / footer) */
  --blue-ink: #0f1a1f;
  --blue-panel: #16262d;
  --blue-line: #2d4753;
  --blue-text: #e9efec;
  --blue-text-soft: #9db3ab;

  /* paper (reading sections) */
  --paper: #eef1ec;
  --paper-raised: #f7f8f5;
  --ink: #14181a;
  --ink-soft: #4b5450;
  --ink-faint: #7c8884;
  --line: #d3dad3;
  --line-soft: #e3e7e1;

  /* ink accents */
  --stamp-red: #b0402e;
  --stamp-red-ink: #ffffff;
  --brass: #ad7f34;
  --brass-soft: #f3ead4;

  --font-display: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --font-body: "Newsreader", Georgia, "Iowan Old Style", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --radius: 2px;
  --max-width: 1120px;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.06rem;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

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

a { color: var(--stamp-red); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--stamp-red);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 0.55em;
  color: var(--ink);
  text-wrap: balance;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); text-transform: uppercase; letter-spacing: -0.015em; }
h2 { font-size: clamp(1.3rem, 2.4vw, 1.7rem); text-transform: uppercase; letter-spacing: -0.005em; }
h3 { font-size: 1.05rem; text-transform: uppercase; letter-spacing: 0.01em; }

p { margin: 0 0 1.1em; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.mono {
  font-family: var(--font-mono);
}

/* ---------- Header (blueprint frame) ---------- */

.site-header {
  background: var(--blue-ink);
  border-bottom: 1px solid var(--blue-line);
  position: sticky;
  top: 0;
  z-index: 20;
  background-image:
    linear-gradient(var(--blue-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--blue-line) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: center top;
  background-blend-mode: normal;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--blue-text);
  white-space: nowrap;
}

.brand:hover { text-decoration: none; color: var(--blue-text); }

.brand__mark {
  width: 9px;
  height: 9px;
  background: var(--stamp-red);
  display: inline-block;
  transform: rotate(45deg);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.nav a {
  color: var(--blue-text-soft);
  position: relative;
  padding-bottom: 0.2rem;
  transition: color 0.15s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--stamp-red);
  transition: right 0.2s ease;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--stamp-red);
  text-decoration: none;
}

.nav a:hover::after,
.nav a[aria-current="page"]::after {
  right: 0;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 0.7rem 1.3rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.1s ease;
}

.btn:hover { text-decoration: none; }

.btn:active { transform: scale(0.96); }

.btn--primary {
  background: var(--stamp-red);
  color: var(--stamp-red-ink);
}

.btn--primary:hover { background: #953526; }

.btn--secondary {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}

.btn--secondary:hover { border-color: var(--stamp-red); color: var(--stamp-red); }

.site-header .btn--secondary,
.hero .btn--secondary {
  border-color: var(--blue-text-soft);
  color: var(--blue-text);
}

.site-header .btn--secondary:hover,
.hero .btn--secondary:hover {
  border-color: var(--stamp-red);
  color: var(--stamp-red);
}

.btn--small { padding: 0.45rem 0.85rem; font-size: 0.74rem; }

/* ---------- Hero (blueprint frame) ---------- */

.hero {
  padding: 4.5rem 0 4rem;
  background: var(--blue-ink);
  color: var(--blue-text);
  background-image:
    linear-gradient(var(--blue-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--blue-line) 1px, transparent 1px);
  background-size: 28px 28px;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brass);
  margin-bottom: 1rem;
}

.hero h1 { color: var(--blue-text); max-width: 780px; }

.hero p.lead {
  font-family: var(--font-body);
  font-size: 1.2rem;
  color: var(--blue-text-soft);
  max-width: 620px;
}

.hero__actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.75rem;
  flex-wrap: wrap;
}

/* ---------- Sections ---------- */

.section {
  padding: 3.75rem 0;
  position: relative;
}

@media (prefers-reduced-motion: no-preference) {
  .section.reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .section.reveal--visible {
    opacity: 1;
    transform: translateY(0);
  }
}

.section--surface { background: var(--paper-raised); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }

.section__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 0.9rem;
}

.section__head h2 { margin-bottom: 0; }

.section__head p {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin: 0.35rem 0 0;
  max-width: 480px;
  text-transform: none;
}

/* chain-link section divider */
.section + .section::before,
.section--surface + .section::before {
  content: "";
  display: block;
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 9px;
  height: 9px;
  background: var(--paper);
  border: 2px solid var(--ink);
}

/* ---------- Manifest grid & line-items ---------- */

.grid {
  display: grid;
  gap: 0;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
}

.grid--domains {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.card {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-raised);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 16px -10px rgba(15, 26, 31, 0.35);
  z-index: 1;
}

.domain-tile {
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.domain-tile:active { transform: scale(0.98); }

.card__cover {
  aspect-ratio: 16 / 7;
  background:
    repeating-linear-gradient(135deg, var(--line-soft), var(--line-soft) 1px, transparent 1px, transparent 10px),
    var(--paper);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  overflow: hidden;
}

.card__cover img,
.guide-hero__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.card__body {
  padding: 1.15rem 1.3rem 1.4rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card__domain {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  font-weight: 600;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.card__id {
  color: var(--stamp-red);
  border: 1px solid var(--stamp-red);
  padding: 0.05rem 0.35rem;
}

.card__title {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.25rem;
  text-transform: none;
  letter-spacing: 0;
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.card__title a { color: var(--ink); }
.card__title a:hover { color: var(--stamp-red); text-decoration: none; }

.card__desc {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0 0 1.2rem;
  flex: 1;
}

.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line);
}

.card__price {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.domain-tile {
  display: block;
  padding: 1.5rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-raised);
  color: var(--ink);
  position: relative;
}

.grid--domains { border-top: 1px solid var(--ink); border-left: 1px solid var(--line); }

.domain-tile:hover {
  background: var(--brass-soft);
  text-decoration: none;
}

.domain-tile__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  margin-bottom: 0.4rem;
}

.domain-tile__count {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
}

/* ---------- Empty state ---------- */

.empty-state {
  border: 1px dashed var(--ink-faint);
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--paper-raised);
}

.empty-state code {
  background: var(--paper);
  padding: 0.1rem 0.35rem;
}

/* ---------- About / credibility ---------- */

.credibility {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.credibility ul {
  margin: 0;
  padding-left: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

.credibility li { margin-bottom: 0.65rem; }

/* ink-stamp badge */
.credential-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--brass);
  border: 2px solid var(--brass);
  padding: 0.3rem 0.7rem;
  margin: 0 0.5rem 0.6rem 0;
  transform: rotate(-2deg);
  position: relative;
}

.credential-badge::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid var(--brass);
}

@media (prefers-reduced-motion: no-preference) {
  .credential-badge,
  .status-flag {
    animation: stamp-impact 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) backwards;
  }

  .credential-badge:nth-of-type(2) { animation-delay: 0.08s; }
  .credential-badge:nth-of-type(3) { animation-delay: 0.16s; }
}

@keyframes stamp-impact {
  0% { opacity: 0; transform: scale(1.8) rotate(-2deg); }
  60% { opacity: 1; }
  100% { opacity: 1; transform: scale(1) rotate(-2deg); }
}

/* ---------- Newsletter ---------- */

.newsletter {
  background: var(--blue-ink);
  color: var(--blue-text);
  padding: 2.75rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  border: 1px solid var(--blue-line);
}

.newsletter h2 { color: var(--blue-text); margin-bottom: 0.4rem; }
.newsletter p { font-family: var(--font-mono); font-size: 0.85rem; color: var(--blue-text-soft); margin: 0; max-width: 420px; }

.newsletter-form {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.newsletter-form input[type="email"] {
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius);
  border: 1px solid var(--blue-line);
  background: var(--blue-panel);
  color: var(--blue-text);
  min-width: 240px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

.newsletter-form input::placeholder { color: var(--blue-text-soft); }

/* ---------- FAQ ---------- */

.faq {
  border-top: 1px solid var(--ink);
}

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 1.15rem 0;
}

.faq summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--stamp-red);
  flex-shrink: 0;
}

.faq details[open] summary::after { content: "\2212"; }

.faq .faq__answer {
  margin-top: 0.85rem;
  color: var(--ink-soft);
  font-family: var(--font-body);
}

/* ---------- Breadcrumb ---------- */

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  padding: 1.25rem 0 0;
}

.breadcrumb a { color: var(--ink-soft); }

/* ---------- Guide page ---------- */

.guide-hero {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 2.5rem;
  padding: 2rem 0 3rem;
  align-items: start;
}

.guide-hero__cover {
  aspect-ratio: 3 / 4;
  background:
    repeating-linear-gradient(135deg, var(--line-soft), var(--line-soft) 1px, transparent 1px, transparent 10px),
    var(--paper);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.guide-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 1.1rem 0 1.6rem;
  padding: 1rem 0;
  border-top: 1px dashed var(--ink-faint);
  border-bottom: 1px dashed var(--ink-faint);
}

.guide-meta strong { color: var(--ink); }

.guide-buy {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.guide-buy__price {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
}

.guide-body {
  max-width: 700px;
  font-size: 1.08rem;
}

.guide-body h2 { margin-top: 2.2rem; font-size: 1.2rem; }

/* rotated ink stamp — draft/status flag */
.status-flag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  padding: 0.3rem 0.7rem;
  border: 2px solid var(--stamp-red);
  color: var(--stamp-red);
  transform: rotate(-3deg);
  margin-bottom: 0.75rem;
}

/* ---------- Footer (blueprint frame) ---------- */

.site-footer {
  background: var(--blue-ink);
  color: var(--blue-text);
  padding: 3.5rem 0 2rem;
  margin-top: 0;
  border-top: 1px solid var(--blue-line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 2.75rem;
}

.footer-grid h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brass);
  margin-bottom: 1rem;
}

.footer-grid p {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--blue-text-soft);
}

.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 0.55rem; }
.footer-grid a {
  color: var(--blue-text-soft);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.footer-grid a:hover { color: var(--stamp-red); }

.footer-bottom {
  border-top: 1px solid var(--blue-line);
  padding-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--blue-text-soft);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-bottom a { color: var(--blue-text-soft); }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .credibility { grid-template-columns: 1fr; gap: 2rem; }
  .guide-hero { grid-template-columns: 200px 1fr; gap: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav { gap: 1rem; }
  .guide-hero { grid-template-columns: 1fr; }
  .guide-hero__cover { max-width: 200px; }
  .footer-grid { grid-template-columns: 1fr; }
  .newsletter { flex-direction: column; align-items: flex-start; }
  h1 { font-size: 1.9rem; }
}