/* ============================================================
   ClawSweeper — abyssal archival logbook
   Editorial dark theme. Hairlines, generous whitespace,
   variable serif display, technical mono marginalia.
   ============================================================ */

:root {
  /* palette */
  --abyss:         #0a0e12;
  --abyss-deep:    #07090c;
  --surface:       #0f1419;
  --hairline:      #1d2630;
  --hairline-mute: #141a20;

  --text-display:  #ecf2f8;
  --text-body:     #b6c0cb;
  --text-mute:     #6f7a87;
  --text-dim:      #44505d;

  --amber:         #d4a574;
  --amber-deep:    #b48656;
  --amber-dim:     #6e553a;

  /* type */
  --display: 'Fraunces', 'EB Garamond', Georgia, serif;
  --body:    'Newsreader', 'Iowan Old Style', Georgia, serif;
  --mono:    'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Consolas, monospace;

  /* layout */
  --max:     78rem;
  --gutter:  clamp(1.25rem, 4vw, 3.5rem);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--abyss);
}

body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(ellipse 90% 55% at 50% -8%,  #0e1924 0%, transparent 55%),
    radial-gradient(ellipse 70% 45% at 90% 110%, #0f1822 0%, transparent 55%),
    radial-gradient(ellipse 50% 35% at 5% 80%,   #0c1521 0%, transparent 55%),
    var(--abyss);
  color: var(--text-body);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.55;
  font-variation-settings: 'opsz' 16;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

::selection {
  background: var(--amber-dim);
  color: var(--text-display);
}

/* film grain --------------------------------------------------- */

.grain {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  opacity: 0.55;
  z-index: 100;
  mix-blend-mode: overlay;
}

/* ===== shell ================================================ */

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 5rem) var(--gutter) clamp(3rem, 6vw, 5rem);
  position: relative;
  z-index: 1;
}

/* ===== hairlines ============================================ */

.rule {
  border: 0;
  height: 1px;
  background: var(--hairline);
  margin: clamp(3rem, 6vw, 5.5rem) 0;
}

.rule-major {
  background: linear-gradient(90deg,
    transparent 0%,
    var(--hairline) 6%,
    var(--hairline) 94%,
    transparent 100%);
}

/* ===== hero ================================================= */

.hero {
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.5rem) 0 clamp(2.5rem, 5vw, 4rem);
}

.crab-glyph {
  display: inline-block;
  width: 22px;
  height: auto;
  vertical-align: -5px;
  margin-right: 0.55em;
  color: var(--amber);
  opacity: 0.85;
  transition: transform 480ms cubic-bezier(.2,.7,.2,1), opacity 480ms;
}

.foot-mark:hover .crab-glyph {
  opacity: 1;
  transform: translateX(2px);
}

.plate {
  display: inline-flex;
  align-items: center;
  gap: 0.85em;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mute);
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--hairline);
  background: rgba(15, 20, 25, 0.4);
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.plate span:nth-child(1) { color: var(--amber); }
.plate-sep              { color: var(--text-dim); font-weight: 400; }

.title {
  font-family: var(--display);
  font-weight: 380;
  font-size: clamp(3.2rem, 11vw, 8.5rem);
  line-height: 0.92;
  letter-spacing: -0.035em;
  color: var(--text-display);
  margin: 0 0 clamp(2rem, 5vw, 3rem);
  font-variation-settings: 'opsz' 144, 'SOFT' 30;
}

.title em {
  font-style: italic;
  font-weight: 320;
  color: var(--amber);
  font-variation-settings: 'opsz' 144, 'SOFT' 100;
}

.lede {
  font-family: var(--display);
  font-style: italic;
  font-weight: 350;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: -0.005em;
  color: var(--text-display);
  max-width: 30ch;
  margin: 0 0 clamp(2rem, 4vw, 2.75rem);
  font-variation-settings: 'opsz' 72, 'SOFT' 60;
}

.sub {
  list-style: none;
  margin: 0 0 clamp(2.5rem, 5vw, 4rem);
  padding: 0;
  font-family: var(--mono);
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--text-mute);
  letter-spacing: 0.005em;
  max-width: 60ch;
}

.sub li {
  position: relative;
  padding-left: 1.5rem;
}

.sub li::before {
  content: '→';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--amber);
}

.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 1.25rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding-top: 1rem;
  border-top: 1px solid var(--hairline-mute);
}

.meta-key { color: var(--text-dim); }
.meta-val { color: var(--text-mute); }

/* ===== lanes ================================================ */

.lanes {
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  gap: clamp(1.75rem, 4vw, 3.5rem);
  align-items: stretch;
}

.lane {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.lane-label {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.lane-num {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
}

.lane-name {
  font-family: var(--display);
  font-size: clamp(1.6rem, 3.2vw, 2.15rem);
  font-weight: 360;
  letter-spacing: -0.02em;
  color: var(--text-display);
  font-variation-settings: 'opsz' 72, 'SOFT' 30;
  line-height: 1.05;
}

.lane-name em {
  font-style: italic;
  font-weight: 340;
  color: var(--amber);
  font-variation-settings: 'opsz' 72, 'SOFT' 100;
}

.lane-body {
  font-size: 1.02rem;
  line-height: 1.6;
  color: var(--text-body);
  margin: 0;
  max-width: 38ch;
}

.lane-body code {
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--amber);
  background: rgba(212, 165, 116, 0.06);
  padding: 0.05em 0.35em;
  border-radius: 1px;
}

.path {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-mute);
  background: rgba(11, 16, 22, 0.55);
  border: 1px solid var(--hairline-mute);
  border-left: 1px solid var(--amber-dim);
  padding: 0.7rem 0.9rem;
  margin: auto 0 0;
  letter-spacing: 0.01em;
  white-space: pre-wrap;
  word-break: break-all;
  align-self: flex-start;
}

.lane-divider {
  background: linear-gradient(180deg,
    transparent 0%,
    var(--hairline) 12%,
    var(--hairline) 88%,
    transparent 100%);
  width: 1px;
}

/* ===== section labels ======================================= */

.section-label {
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 1.75rem;
  display: flex;
  align-items: center;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--amber-dim), transparent 70%);
  margin-left: 1.25rem;
  max-width: 18rem;
}

.section-intro {
  font-family: var(--display);
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  line-height: 1.4;
  font-weight: 360;
  color: var(--text-display);
  max-width: 38ch;
  margin: 0 0 2.5rem;
  font-variation-settings: 'opsz' 72, 'SOFT' 30;
}

/* ===== rails (guardrails) =================================== */

.rails {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hairline);
  max-width: 56rem;
}

.rails li {
  display: grid;
  grid-template-columns: 4rem 1fr;
  align-items: baseline;
  gap: 1.5rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--body);
  font-size: 1.08rem;
  color: var(--text-body);
  transition:
    padding-left 380ms cubic-bezier(.2,.7,.2,1),
    color 380ms;
}

.rails li:hover {
  padding-left: 0.85rem;
  color: var(--text-display);
}

.rail-num {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  transition: color 380ms;
}

.rails li:hover .rail-num { color: var(--amber); }

.rails code {
  font-family: var(--mono);
  font-size: 0.84em;
  color: var(--amber);
}

.footnote {
  margin: 2.25rem 0 0;
  font-family: var(--body);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--text-mute);
  max-width: 56ch;
  line-height: 1.55;
  font-variation-settings: 'opsz' 14;
}

/* ===== apparatus grid ======================================= */

.apparatus-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  border-top: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
}

.apparatus-grid li {
  font-family: var(--mono);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  color: var(--text-body);
  padding: 1.4rem 1.25rem;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: rgba(15, 20, 25, 0.3);
  transition: background 320ms, color 320ms;
}

.apparatus-grid li::before {
  content: '◇';
  color: var(--amber);
  margin-right: 0.7em;
  font-size: 0.75em;
  vertical-align: 0.05em;
  opacity: 0.85;
  transition: content 0s;
}

.apparatus-grid li:hover {
  background: rgba(212, 165, 116, 0.045);
  color: var(--text-display);
}

.apparatus-grid li:hover::before {
  content: '◆';
}

/* ===== watch ================================================ */

.watch-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hairline);
  max-width: 50rem;
}

.watch-list li {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--hairline);
}

.watch-repo {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--text-display);
  letter-spacing: 0.005em;
}

.watch-repo .slash {
  color: var(--text-dim);
  margin: 0 0.15em;
}

.watch-note {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--text-mute);
  text-transform: uppercase;
}

/* ===== footer =============================================== */

.foot {
  margin-top: clamp(3rem, 6vw, 5rem);
}

.foot-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: clamp(1.5rem, 3vw, 2.5rem);
}

.foot-mark {
  font-family: var(--display);
  font-size: 1rem;
  color: var(--text-mute);
  margin: 0;
  font-variation-settings: 'opsz' 24, 'SOFT' 60;
  line-height: 1.5;
  max-width: 40ch;
}

.foot-mark em {
  font-style: italic;
  color: var(--text-display);
  font-weight: 380;
  font-variation-settings: 'opsz' 24, 'SOFT' 100;
}

.foot-links {
  display: flex;
  gap: 1.85rem;
}

.foot-links a {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-mute);
  text-decoration: none;
  position: relative;
  padding-bottom: 0.3rem;
  transition: color 280ms;
}

.foot-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 0;
  background: var(--amber);
  transition: width 360ms cubic-bezier(.2,.7,.2,1);
}

.foot-links a:hover { color: var(--amber); }
.foot-links a:hover::after { width: 100%; }
.foot-links a:focus-visible {
  outline: 1px solid var(--amber);
  outline-offset: 4px;
}

/* ===== page-load motion ===================================== */

@media (prefers-reduced-motion: no-preference) {
  .plate,
  .title,
  .lede,
  .sub,
  .hero-meta {
    opacity: 0;
    transform: translateY(8px);
    animation: rise 1100ms cubic-bezier(.2,.7,.2,1) forwards;
  }

  .plate     { animation-delay:   0ms; }
  .title     { animation-delay: 110ms; }
  .lede      { animation-delay: 280ms; }
  .sub       { animation-delay: 440ms; }
  .hero-meta { animation-delay: 600ms; }

  @keyframes rise {
    to {
      opacity: 1;
      transform: none;
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* ===== responsive =========================================== */

@media (max-width: 760px) {
  body { font-size: 16px; }

  .lanes {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .lane-divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg,
      transparent, var(--hairline) 8%, var(--hairline) 92%, transparent);
    margin: 2.5rem 0;
  }

  .plate {
    flex-wrap: wrap;
    gap: 0.5em 0.85em;
  }

  .rails li {
    grid-template-columns: 2.5rem 1fr;
    gap: 0.85rem;
  }

  .section-label::after { display: none; }
}

@media (max-width: 480px) {
  .title       { font-size: clamp(2.75rem, 14vw, 4.25rem); }
  .lede        { font-size: 1.35rem; }
  .foot-row    { flex-direction: column; align-items: flex-start; }
  .foot-links  { flex-wrap: wrap; gap: 1rem 1.5rem; }
}