/* zauh.net — the thread. One line down the centre of the void. */

:root {
  --bg: #0a0b0a;
  --bg-raised: #0f100f;
  --ink: #eeeade;
  --ink-soft: #aaa89f;
  --ink-faint: #74756f;
  --line: rgba(238, 234, 222, 0.12);
  --line-strong: rgba(238, 234, 222, 0.26);
  --amber: #e3a35a;
  --cyan: #7ed4e8;
  --oxide: #d45b36;
  --paper: #f0ede4;
  --paper-ink: #10110f;
  --display: "Newsreader", Georgia, serif;
  --sans: "IBM Plex Sans", Arial, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --page: min(100% - 40px, 940px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(520px 420px at -6% 4%, rgba(227, 163, 90, 0.07), transparent 70%),
    radial-gradient(560px 480px at 106% 10%, rgba(126, 212, 232, 0.05), transparent 72%),
    radial-gradient(640px 520px at -8% 74%, rgba(165, 148, 223, 0.04), transparent 74%),
    radial-gradient(720px 560px at 108% 86%, rgba(227, 163, 90, 0.05), transparent 74%),
    radial-gradient(1300px 460px at 50% 118%, rgba(227, 163, 90, 0.06), transparent 78%),
    var(--bg);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

::selection {
  color: var(--paper-ink);
  background: var(--paper);
}

:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 4px;
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
p {
  margin-top: 0;
  text-wrap: balance;
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--paper-ink);
  background: var(--paper);
  font: 400 12px var(--mono);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ---------- Ambient light and edge motifs ---------- */

.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.motif {
  position: fixed;
  z-index: 0;
  display: none;
  pointer-events: none;
}

.motif-a {
  top: 22vh;
  left: calc(50% - 540px);
  color: var(--amber);
  opacity: 0.16;
}

.motif-b {
  top: 56vh;
  right: calc(50% - 540px);
  color: var(--cyan);
  opacity: 0.13;
}

@media (min-width: 1240px) {
  .motif {
    display: block;
  }
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: var(--page);
  height: 68px;
  margin-inline: auto;
  padding: 0 8px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

.brand {
  justify-self: start;
  color: var(--ink);
  font: 500 13px var(--mono);
  letter-spacing: 0.06em;
}

.brand:hover {
  color: var(--amber);
}

.site-nav {
  display: flex;
  gap: clamp(14px, 2.2vw, 28px);
  justify-self: center;
}

.site-nav a {
  color: var(--ink-soft);
  font: 500 12px var(--mono);
  letter-spacing: 0.02em;
  transition: color 0.18s ease;
}

.site-nav a:hover {
  color: var(--ink);
}

.place {
  justify-self: end;
  color: var(--ink-faint);
  font: 400 11px var(--mono);
  letter-spacing: 0.1em;
}

/* ---------- The thread ---------- */

.site-main {
  position: relative;
}

.thread {
  position: absolute;
  z-index: 0;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-0.5px);
  background: linear-gradient(
    180deg,
    transparent,
    color-mix(in srgb, var(--amber) 30%, transparent) 6%,
    color-mix(in srgb, var(--amber) 30%, transparent) 94%,
    transparent
  );
  pointer-events: none;
}

.site-main > section {
  position: relative;
  z-index: 1;
  scroll-margin-top: 84px;
}

.section {
  max-width: 920px;
  margin-inline: auto;
  padding: clamp(84px, 14vh, 170px) 24px 0;
}

/* ---------- Hero ---------- */

.hero {
  padding: clamp(100px, 18vh, 210px) 24px 0;
  text-align: center;
}

.hero .note {
  max-width: 520px;
  margin: 0 auto 30px;
  color: var(--ink-faint);
  font: 400 12px/1.6 var(--mono);
  letter-spacing: 0.1em;
}

.hero h1 {
  max-width: 820px;
  margin: 0 auto 30px;
  font: 390 clamp(42px, 6.4vw, 86px)/1 var(--display);
  letter-spacing: -0.045em;
}

.hero .sub {
  max-width: 560px;
  margin: 0 auto;
  color: var(--ink-soft);
  font: 400 13px/1.9 var(--mono);
}

.hero .sub span {
  color: var(--ink-faint);
}

/* ---------- Section chunks ---------- */

.chunk {
  max-width: 680px;
  margin: 0 auto clamp(40px, 6vh, 72px);
  text-align: center;
}

.chunk h2 {
  max-width: 620px;
  margin: 0 auto 18px;
  font: 390 clamp(34px, 4.4vw, 58px)/1.02 var(--display);
  letter-spacing: -0.04em;
}

.lead {
  max-width: 560px;
  margin: 0 auto;
  color: var(--ink-soft);
  font: 400 clamp(16px, 1.4vw, 18px)/1.7 var(--sans);
}

/* ---------- List rows ---------- */

.rows {
  max-width: 860px;
  margin-inline: auto;
  border-top: 1px solid var(--line);
}

.row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 24px;
  align-items: baseline;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.row .row-meta {
  grid-column: 1;
  color: var(--ink-faint);
  font: 500 11px/1.4 var(--mono);
  letter-spacing: 0.12em;
}

.row h3 {
  grid-column: 1;
  margin: 0;
  font: 400 clamp(22px, 2.2vw, 29px)/1.12 var(--display);
  letter-spacing: -0.02em;
}

.row .row-state {
  grid-column: 2;
  grid-row: 2;
  justify-self: end;
  color: var(--ink-soft);
  font: 400 12px var(--mono);
}

.row .row-description {
  grid-column: 1;
  max-width: 620px;
  margin: 0;
  color: var(--ink-soft);
  font: 400 15px/1.65 var(--sans);
}

.row .row-action {
  grid-column: 1;
  margin-top: 12px;
  color: var(--ink-soft);
  font: 500 12px var(--mono);
  transition: color 0.18s ease;
}

.row:hover .row-action {
  color: var(--amber);
}

a.row h3 {
  transition: color 0.18s ease;
}

a.row:hover h3 {
  color: var(--amber);
}

.row .row-arrow {
  grid-column: 2;
  grid-row: 2;
  justify-self: end;
  color: var(--ink-faint);
}

/* ---------- Music ---------- */

.music-console {
  max-width: 560px;
  margin-inline: auto;
  display: grid;
  gap: 20px;
  text-align: center;
}

.music-console .now-playing {
  color: var(--ink-faint);
  font: 400 11px/1.4 var(--mono);
  letter-spacing: 0.12em;
}

.music-console .track-title {
  font: 390 clamp(30px, 3.4vw, 44px)/1.05 var(--display);
  letter-spacing: -0.03em;
}

.music-console audio {
  width: 100%;
}

.music-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 26px;
}

.music-links a {
  color: var(--ink-soft);
  font: 500 12px var(--mono);
  transition: color 0.18s ease;
}

.music-links a:hover {
  color: var(--cyan);
}

.music-meta {
  display: grid;
  justify-items: center;
  gap: 4px;
  color: var(--ink-faint);
  font: 400 11px/1.5 var(--mono);
  letter-spacing: 0.08em;
}

.music-meta strong {
  color: var(--ink-soft);
  font: 500 12px var(--mono);
  letter-spacing: 0.08em;
}

/* ---------- Contact ---------- */

.contact-mail {
  display: inline-block;
  margin-top: 8px;
  color: var(--ink);
  font: 500 clamp(15px, 1.6vw, 19px) var(--mono);
  letter-spacing: 0.04em;
  border-bottom: 1px solid color-mix(in srgb, var(--amber) 42%, transparent);
  padding-bottom: 4px;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.contact-mail:hover {
  color: var(--amber);
  border-color: var(--amber);
}

/* ---------- Footer ---------- */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 28px;
  max-width: 860px;
  margin-inline: auto;
  padding: clamp(84px, 14vh, 170px) 24px 72px;
  text-align: center;
}

.site-footer span,
.site-footer a {
  color: var(--ink-faint);
  font: 400 11px/1.6 var(--mono);
  letter-spacing: 0.08em;
}

.site-footer a:hover {
  color: var(--cyan);
}

/* ---------- Subpages ---------- */

.route-main {
  position: relative;
}

.route-thread {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-0.5px);
  background: linear-gradient(
    180deg,
    transparent,
    color-mix(in srgb, var(--amber) 26%, transparent) 10%,
    color-mix(in srgb, var(--amber) 26%, transparent) 90%,
    transparent
  );
  pointer-events: none;
}

.route {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin-inline: auto;
  padding: clamp(64px, 10vh, 110px) 24px 0;
}

.back-link {
  display: inline-block;
  margin-bottom: clamp(44px, 7vh, 72px);
  color: var(--ink-soft);
  font: 500 12px var(--mono);
  letter-spacing: 0.06em;
  transition: color 0.18s ease;
}

.back-link:hover {
  color: var(--amber);
}

.route .meta {
  margin: 0 0 20px;
  color: var(--ink-faint);
  font: 500 11px/1.4 var(--mono);
  letter-spacing: 0.12em;
}

.route h1 {
  margin: 0 0 24px;
  font: 390 clamp(44px, 7vw, 84px)/0.98 var(--display);
  letter-spacing: -0.045em;
}

.route .lede {
  max-width: 560px;
  margin: 0 auto 18px;
  color: var(--ink-soft);
  font: italic 400 clamp(18px, 1.9vw, 21px)/1.45 var(--display);
}

.route .byline {
  margin: 0 0 46px;
  color: var(--ink-faint);
  font: 500 11px var(--mono);
  letter-spacing: 0.14em;
}

.route .mark {
  margin: 0 auto 46px;
  color: var(--ink-faint);
  font: 400 12px var(--mono);
  text-align: center;
}

.route-body {
  max-width: 620px;
  margin-inline: auto;
}

.route-body p {
  margin: 0 0 26px;
  color: var(--ink-soft);
  font: 400 clamp(16px, 1.35vw, 18px)/1.8 var(--sans);
}

.route-note {
  max-width: 620px;
  margin: 0 auto 46px;
  padding: 18px 22px;
  border: 1px solid var(--line);
}

.route-note span {
  display: block;
  margin-bottom: 10px;
  color: var(--cyan);
  font: 500 10px/1.3 var(--mono);
  letter-spacing: 0.14em;
}

.route-note p {
  margin: 0;
  color: var(--ink-faint);
  font: 400 13px/1.65 var(--mono);
}

.route-next {
  display: block;
  max-width: 620px;
  margin: clamp(48px, 8vh, 80px) auto 0;
  padding: 26px 0;
  border-top: 1px solid var(--line);
  text-align: center;
}

.route-next span {
  display: block;
  margin-bottom: 8px;
  color: var(--ink-faint);
  font: 500 10px var(--mono);
  letter-spacing: 0.14em;
}

.route-next strong {
  color: var(--ink-soft);
  font: 400 20px/1.1 var(--display);
  transition: color 0.18s ease;
}

.route-next:hover strong {
  color: var(--amber);
}

.signal {
  max-width: 420px;
  margin: clamp(40px, 6vh, 60px) auto;
  padding: 16px;
  border: 1px solid var(--line-strong);
}

.signal pre {
  margin: 0;
  color: var(--amber);
  font: 400 12px/1.3 var(--mono);
  text-align: center;
}

.route .pending {
  max-width: 480px;
  margin: 0 auto;
  color: var(--ink-soft);
  font: 400 15px/1.7 var(--sans);
  text-align: center;
}

.not-found {
  min-height: 70vh;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 24px;
}

.not-found h1 {
  font: 390 clamp(40px, 6vw, 72px)/1 var(--display);
  letter-spacing: -0.04em;
}

.not-found .return {
  margin-top: 28px;
  color: var(--ink-soft);
  font: 500 12px var(--mono);
}

.not-found .return:hover {
  color: var(--amber);
}

/* ---------- Mobile ---------- */

@media (max-width: 720px) {
  .site-nav {
    display: none;
  }
}

@media (max-width: 660px) {
  .hero h1 {
    font-size: clamp(38px, 10.5vw, 52px);
  }

  .route h1 {
    font-size: clamp(40px, 11vw, 56px);
  }

  .row {
    grid-template-columns: 1fr;
  }

  .row .row-state,
  .row .row-arrow {
    grid-column: 1;
    grid-row: auto;
    justify-self: start;
    margin-top: 8px;
  }

  .signal pre {
    font-size: 9px;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}