:root {
  --ink: #14161c;
  --ink-soft: #2c313b;
  --paper: #f3f2ef;
  --card: #ffffff;
  --line: #dbd7d0;
  --line-soft: #e9e6e1;
  --dim: #6a6f79;
  --accent: #b5401b;
  --accent-soft: #f3e4de;
  --rail: 17rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 6rem; }

body {
  margin: 0;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: #fff; }

a { color: inherit; }

.skip {
  position: absolute;
  left: -9999px;
  z-index: 90;
  background: var(--ink);
  color: #fff;
  padding: 0.8rem 1.2rem;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

/* ---------- rail ---------- */

#rail {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail);
  background: var(--ink);
  color: #e8e6e2;
  display: none;
  flex-direction: column;
  z-index: 40;
}

@media (min-width: 1100px) {
  #rail { display: flex; }
  #shell { margin-left: var(--rail); }
}

.rail-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.6rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.rail-brand strong {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  display: block;
  line-height: 1.1;
}
.rail-brand span {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #8d9199;
}

.rail-scroll { flex: 1; overflow-y: auto; padding: 1.25rem 0; }

.rail-group {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #7c8089;
  padding: 1.1rem 1.5rem 0.5rem;
}

.rail-link {
  display: grid;
  grid-template-columns: 2.1rem 1fr;
  align-items: baseline;
  padding: 0.42rem 1.5rem;
  text-decoration: none;
  color: #d7d5d1;
  font-size: 0.95rem;
  border-left: 2px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.rail-link em {
  font-family: "IBM Plex Mono", monospace;
  font-style: normal;
  font-size: 0.7rem;
  color: #71757e;
}
.rail-link:hover { color: #fff; background: rgba(255, 255, 255, 0.05); }
.rail-link.active {
  color: #fff;
  border-left-color: var(--accent);
  background: rgba(181, 64, 27, 0.16);
}
.rail-link.active em { color: var(--accent); }

.rail-foot {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 1.1rem 1.5rem 1.4rem;
  font-size: 0.8rem;
  color: #9a9ea6;
  line-height: 1.5;
}
.rail-foot a { color: #fff; text-decoration: none; }
.rail-foot a:hover { text-decoration: underline; }

/* ---------- topbar (mobile) ---------- */

#topbar {
  position: sticky;
  top: 0;
  z-index: 45;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: var(--ink);
  color: #fff;
}
#topbar a { text-decoration: none; }
.burger {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.45rem 0.8rem;
}

#drawer {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: var(--ink);
  color: #fff;
  padding: 1.25rem;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-1.5rem);
  transition: opacity 0.3s ease, transform 0.35s ease, visibility 0s linear 0.35s;
}
#drawer.open {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity 0.3s ease, transform 0.35s ease, visibility 0s;
}
#drawer a {
  display: block;
  padding: 0.55rem 0;
  font-size: 1.3rem;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

@media (min-width: 1100px) {
  #topbar, #drawer { display: none; }
}

/* ---------- layout ---------- */

.wrap { padding: 0 clamp(1.25rem, 4vw, 4rem); }
.narrow { max-width: 46rem; }

.crumbs {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  padding: 2.75rem 0 2.5rem;
}
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--accent); }

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.1rem;
}

h1.page-title {
  font-size: clamp(2.4rem, 5.4vw, 4.3rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 600;
  margin: 0 0 1.5rem;
  max-width: 20ch;
}

.lede {
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 44rem;
  margin: 0 0 2rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0 2.5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 0.9rem 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}
.meta-row b { color: var(--ink); font-weight: 500; }

.hero-figure {
  margin: 2.5rem 0 0;
  overflow: hidden;
}
.hero-figure img {
  width: 100%;
  height: clamp(18rem, 44vw, 34rem);
  object-fit: cover;
  display: block;
  filter: saturate(0.92) contrast(1.03);
}
figcaption {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  padding-top: 0.6rem;
}

.layout {
  display: grid;
  gap: 3rem;
  padding-top: 3.5rem;
  padding-bottom: 1rem;
}
@media (min-width: 960px) {
  .layout { grid-template-columns: 15rem minmax(0, 1fr); gap: 4rem; }
}

.toc { position: sticky; top: 5rem; align-self: start; }
.toc p {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
  margin: 0 0 0.9rem;
}
.toc a {
  display: block;
  padding: 0.32rem 0 0.32rem 0.85rem;
  border-left: 2px solid var(--line);
  font-size: 0.9rem;
  color: var(--dim);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.toc a:hover { color: var(--ink); }
.toc a.on { color: var(--ink); border-left-color: var(--accent); font-weight: 500; }

article h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.15rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 600;
  margin: 0 0 1rem;
}
article h2 .num {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--accent);
  display: block;
  margin-bottom: 0.55rem;
  letter-spacing: 0.2em;
}
article h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}
article p { margin: 0 0 1.1rem; max-width: 42rem; }
article section { padding-bottom: 3.2rem; margin-bottom: 3.2rem; border-bottom: 1px solid var(--line-soft); }
article section:last-of-type { border-bottom: 0; }

article a[href] { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
article a[href]:hover { background: var(--accent-soft); }

/* ---------- modules ---------- */

.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); margin: 1.75rem 0; }
@media (min-width: 700px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}
.grid > div { background: var(--card); padding: 1.5rem; }

.stat { display: block; }
.stat b {
  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  display: block;
  line-height: 1;
  margin-bottom: 0.6rem;
}
.stat span { font-size: 0.9rem; color: var(--dim); display: block; }

.tbl { width: 100%; border-collapse: collapse; margin: 1.75rem 0; font-size: 0.94rem; background: var(--card); }
.tbl caption {
  caption-side: top;
  text-align: left;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
  padding-bottom: 0.6rem;
}
.tbl th, .tbl td { padding: 0.85rem 1rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line-soft); }
.tbl thead th {
  background: var(--ink);
  color: #fff;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
}
.tbl tbody tr:nth-child(even) { background: #faf9f7; }
.tbl td.num { font-family: "IBM Plex Mono", monospace; white-space: nowrap; }

.note {
  border-left: 3px solid var(--accent);
  background: var(--card);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
}
.note p:last-child { margin-bottom: 0; }
.note b { font-family: "IBM Plex Mono", monospace; font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); display: block; margin-bottom: 0.5rem; }

.pull {
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  font-weight: 500;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  padding: 1.6rem 0;
  margin: 2.25rem 0;
  max-width: 40rem;
}

.steps { list-style: none; counter-reset: s; padding: 0; margin: 1.75rem 0; }
.steps li {
  counter-increment: s;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line-soft);
}
.steps li::before {
  content: counter(s, decimal-leading-zero);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--accent);
  padding-top: 0.2rem;
}

.checks { list-style: none; padding: 0; margin: 1.5rem 0; }
.checks li { padding: 0.55rem 0 0.55rem 1.6rem; border-bottom: 1px solid var(--line-soft); position: relative; }
.checks li::before { content: "→"; position: absolute; left: 0; color: var(--accent); }

.bar-row { margin: 1rem 0; }
.bar-head { display: flex; justify-content: space-between; font-family: "IBM Plex Mono", monospace; font-size: 0.74rem; letter-spacing: 0.08em; margin-bottom: 0.4rem; }
.bar-track { height: 0.6rem; background: var(--line-soft); }
.bar-fill { height: 100%; background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform 1.1s cubic-bezier(0.22, 1, 0.36, 1); }
.bar-fill.is-in { transform: scaleX(1); }
.bar-fill.accent { background: var(--accent); }

.duo { display: grid; gap: 1.25rem; margin: 2rem 0; }
@media (min-width: 760px) { .duo { grid-template-columns: 1fr 1fr; } }
.duo img { width: 100%; height: 17rem; object-fit: cover; display: block; filter: saturate(0.92) contrast(1.03); }

.band-img { margin: 2.5rem 0; }
.band-img img { width: 100%; height: clamp(14rem, 30vw, 24rem); object-fit: cover; display: block; filter: saturate(0.92) contrast(1.03); }

/* ---------- faq / related / cta ---------- */

.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); background: var(--card); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 1.15rem 1.25rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-family: "IBM Plex Mono", monospace; }
.faq details[open] summary::after { content: "−"; }
.faq p { padding: 0 1.25rem 1.3rem; margin: 0; max-width: 44rem; color: var(--ink-soft); }

.rel { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (min-width: 800px) { .rel { grid-template-columns: repeat(3, 1fr); } }
.rel a { background: var(--card); padding: 1.6rem; text-decoration: none; display: block; transition: background 0.25s ease; }
.rel a:hover { background: var(--ink); color: #fff; }
.rel a:hover .rel-num { color: var(--accent); }
.rel-num { font-family: "IBM Plex Mono", monospace; font-size: 0.7rem; letter-spacing: 0.18em; color: var(--dim); display: block; margin-bottom: 0.9rem; }
.rel strong { display: block; font-size: 1.3rem; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 0.5rem; }
.rel span { font-size: 0.9rem; color: inherit; opacity: 0.75; }

.cta {
  background: var(--ink);
  color: #fff;
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.25rem, 4vw, 4rem);
  display: grid;
  gap: 2rem;
}
@media (min-width: 860px) { .cta { grid-template-columns: 1.3fr 1fr; align-items: end; } }
.cta h2 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); line-height: 1.1; letter-spacing: -0.03em; margin: 0; font-weight: 600; }
.cta a { color: #fff; }
.btn {
  display: inline-block;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  padding: 0.9rem 1.6rem;
  text-decoration: none;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: background 0.25s ease, color 0.25s ease;
}
.btn:hover { background: transparent; color: var(--accent); }
.btn.ghost { background: transparent; border-color: currentColor; color: inherit; }
.btn.ghost:hover { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ---------- footer ---------- */

footer.site {
  background: #ffffff;
  border-top: 1px solid var(--line);
  padding: clamp(2.5rem, 5vw, 4rem) clamp(1.25rem, 4vw, 4rem) 2rem;
}
.foot-grid { display: grid; gap: 2.5rem; }
@media (min-width: 900px) { .foot-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; } }
.foot-grid h4 {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--dim);
  margin: 0 0 1rem;
  font-weight: 500;
}
.foot-grid a { display: block; padding: 0.22rem 0; text-decoration: none; font-size: 0.94rem; }
.foot-grid a:hover { color: var(--accent); }
.foot-brand { display: flex; gap: 0.9rem; align-items: flex-start; }
.foot-brand p { margin: 0.5rem 0 0; font-size: 0.9rem; color: var(--dim); max-width: 24rem; }
.foot-bottom {
  margin-top: 2.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}

/* ---------- forms ---------- */

.form-grid { display: grid; gap: 1.4rem; max-width: 34rem; }
label.f {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
  display: block;
  margin-bottom: 0.4rem;
}
input, textarea, select {
  width: 100%;
  font: inherit;
  color: inherit;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 0.75rem 0.9rem;
  border-radius: 0;
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -2px; }
button { border-radius: 0; cursor: pointer; font: inherit; }

/* ---------- cookie ---------- */

#cookie {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translate(-50%, 1.5rem);
  width: min(52rem, calc(100vw - 2rem));
  z-index: 70;
  background: var(--ink);
  color: #eceae6;
  display: grid;
  gap: 1rem;
  padding: 1.25rem 1.4rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), visibility 0s linear 0.4s;
}
@media (min-width: 780px) { #cookie { grid-template-columns: 1fr auto; align-items: center; } }
@media (min-width: 1100px) {
  #cookie { left: calc(var(--rail) + 1.5rem); right: 1.5rem; width: auto; transform: translate(0, 1.5rem); }
  #cookie.show { transform: translate(0, 0); }
}
#cookie.show { opacity: 1; visibility: visible; transform: translate(-50%, 0); transition: opacity 0.35s ease, transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), visibility 0s; }
#cookie p { margin: 0; font-size: 0.9rem; }
#cookie a { color: #fff; }
.cookie-btns { display: flex; gap: 0.6rem; }
.cookie-btns button {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  padding: 0.6rem 1.1rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.cookie-btns button#c-yes { background: var(--accent); border-color: var(--accent); }

/* ---------- motion ---------- */

.rv { opacity: 0; transform: translateY(14px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1); }
.rv.is-in { opacity: 1; transform: none; }

.mask img { clip-path: inset(0 0 100% 0); transition: clip-path 0.9s cubic-bezier(0.22, 1, 0.36, 1); }
.mask.is-in img { clip-path: inset(0 0 0 0); }

@media (prefers-reduced-motion: reduce) {
  .rv, .mask img, .bar-fill { transition: none; opacity: 1; transform: none; clip-path: none; }
  .bar-fill { transform: scaleX(1); }
  html { scroll-behavior: auto; }
}