/* Inner spaces: the archive, reading layer and project laboratory share one visual grammar. */

body[data-page="notes"],
body[data-page="note"],
body[data-page="keke"] {
  --inner-cool: #7888c8;
  --inner-cool-soft: rgba(120, 136, 200, 0.12);
  --inner-warm: #b39a78;
  --inner-warm-soft: rgba(179, 154, 120, 0.12);
  --inner-path: color-mix(in srgb, var(--text) 13%, transparent);
  --inner-path-active: color-mix(in srgb, var(--inner-cool) 58%, var(--inner-warm));
  background:
    radial-gradient(ellipse 52% 34% at 12% 12%, var(--inner-cool-soft), transparent 72%),
    radial-gradient(ellipse 46% 30% at 91% 72%, var(--inner-warm-soft), transparent 76%),
    var(--bg);
}

html[data-theme="dark"] body[data-page="notes"],
html[data-theme="dark"] body[data-page="note"],
html[data-theme="dark"] body[data-page="keke"] {
  --inner-cool: #9aa8df;
  --inner-cool-soft: rgba(104, 125, 184, 0.11);
  --inner-warm: #c9ad86;
  --inner-warm-soft: rgba(184, 144, 88, 0.075);
}

body[data-page="notes"] main,
body[data-page="note"] main,
body[data-page="keke"] main {
  position: relative;
  isolation: isolate;
}

body[data-page="notes"] main > *,
body[data-page="note"] main > *,
body[data-page="keke"] main > * {
  position: relative;
  z-index: 1;
}

/* A single slow atmospheric current connects the inner pages without copying the homepage. */
.writing-page-direct::before,
.article-main::before,
.project-page::before {
  position: absolute;
  left: 50%;
  top: 5%;
  z-index: 0;
  width: 110vw;
  height: clamp(150px, 20vw, 250px);
  content: "";
  border-top: 1px solid color-mix(in srgb, var(--inner-cool) 24%, transparent);
  border-radius: 50%;
  opacity: 0.42;
  pointer-events: none;
  transform: translate3d(-52%, 0, 0) rotate(-3deg);
  filter: drop-shadow(0 22px 48px var(--inner-cool-soft));
  animation: inner-current-drift 58s ease-in-out infinite alternate;
}

.article-main::before {
  top: 15%;
  opacity: 0.2;
}

.project-page::before {
  top: 4%;
  height: clamp(180px, 24vw, 310px);
  opacity: 0.56;
}

/* Notes: star-map archive. */
.writing-page-direct {
  padding-top: 58px;
  overflow: hidden;
}

.writing-page-direct .archive-list {
  position: relative;
  width: min(100%, 940px);
  margin-inline: auto;
  padding-left: 68px;
  border-top: 0;
}

.writing-page-direct .archive-list::before {
  position: absolute;
  left: 25px;
  top: 16px;
  bottom: 16px;
  width: 38px;
  content: "";
  border-left: 1px solid var(--inner-path);
  border-radius: 52% 0 0 48%;
  opacity: 0.9;
  transform: skewY(-1.6deg);
  pointer-events: none;
}

.writing-page-direct .archive-row-v2 {
  position: relative;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  min-height: 138px;
  padding: 34px 0;
  border-bottom-color: color-mix(in srgb, var(--line) 76%, transparent);
  transition: transform 200ms ease, border-color 200ms ease;
}

.writing-page-direct .archive-row-v2::before {
  position: absolute;
  left: -42px;
  top: 47px;
  width: 34px;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, var(--inner-path), transparent);
  transform: rotate(var(--archive-branch-angle, -2deg));
  transform-origin: left center;
  transition: width 200ms ease, background 200ms ease;
}

.writing-page-direct .archive-row-v2:nth-child(3n + 2) { --archive-branch-angle: 2.4deg; }
.writing-page-direct .archive-row-v2:nth-child(3n) { --archive-branch-angle: -1deg; }

.writing-page-direct .archive-row-meta .note-kind-marker {
  position: absolute;
  left: -47px;
  top: 43px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--bg);
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--note-kind-color) 60%, transparent),
    0 0 0 7px color-mix(in srgb, var(--note-kind-color) 7%, transparent);
  transition: scale 200ms ease, box-shadow 200ms ease;
}

.writing-page-direct .archive-row-v2 h2,
.writing-page-direct .archive-row-v2 p,
.writing-page-direct .archive-row-arrow {
  transition: transform 200ms ease, color 200ms ease, opacity 200ms ease;
}

.writing-page-direct .archive-row-v2 h2 {
  max-width: 820px;
  font-size: clamp(1.38rem, 2.3vw, 1.92rem);
}

.writing-page-direct .archive-row-v2 p {
  max-width: 720px;
}

.writing-page-direct .archive-row-arrow {
  color: var(--quiet);
  opacity: 0.66;
}

.writing-page-direct .archive-row-v2:hover,
.writing-page-direct .archive-row-v2:focus-visible {
  transform: translateX(5px);
  outline: none;
}

.writing-page-direct .archive-row-v2:hover::before,
.writing-page-direct .archive-row-v2:focus-visible::before {
  width: 42px;
  background: linear-gradient(90deg, var(--note-kind-color), transparent);
}

.writing-page-direct .archive-row-v2:hover .note-kind-marker,
.writing-page-direct .archive-row-v2:focus-visible .note-kind-marker {
  scale: 1.16;
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--note-kind-color) 82%, transparent),
    0 0 0 10px color-mix(in srgb, var(--note-kind-color) 11%, transparent),
    0 0 18px color-mix(in srgb, var(--note-kind-color) 34%, transparent);
}

.writing-page-direct .archive-row-v2:hover h2,
.writing-page-direct .archive-row-v2:focus-visible h2 {
  transform: translateX(3px);
}

.writing-page-direct .archive-row-v2:hover .archive-row-arrow,
.writing-page-direct .archive-row-v2:focus-visible .archive-row-arrow {
  color: var(--note-kind-color);
  opacity: 1;
  transform: translateX(4px);
}

/* Note: silent reading layer. */
.article-main {
  position: relative;
  overflow: visible;
}

.article-main::after {
  position: absolute;
  right: -18vw;
  top: 20%;
  z-index: 0;
  width: 34vw;
  min-width: 280px;
  height: 48%;
  content: "";
  border-right: 1px dashed color-mix(in srgb, var(--inner-warm) 22%, transparent);
  border-radius: 50%;
  opacity: 0.52;
  pointer-events: none;
  transform: rotate(4deg);
}

.note-article header {
  position: relative;
  padding-bottom: 56px;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
}

.article-meta-line::after {
  width: 58px;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, var(--note-kind-color), transparent);
  opacity: 0.72;
}

.note-article h1 {
  text-wrap: balance;
}

.article-body {
  position: relative;
  padding-top: 14px;
}

.article-body h2,
.article-body h3 {
  position: relative;
}

.article-body h2::before,
.article-body h3::before {
  position: absolute;
  left: -22px;
  top: 0.72em;
  width: 5px;
  height: 5px;
  content: "";
  border-radius: 50%;
  background: var(--note-kind-color, var(--inner-cool));
  opacity: 0.54;
}

.reading-path {
  --reading-progress: 0;
  position: absolute;
  left: -54px;
  top: 176px;
  bottom: 156px;
  z-index: 2;
  width: 1px;
  pointer-events: none;
}

.reading-path::before,
.reading-path-fill {
  position: absolute;
  inset: 0;
  content: "";
  transform-origin: top center;
}

.reading-path::before {
  background: var(--inner-path);
}

.reading-path-fill {
  background: linear-gradient(180deg, var(--note-kind-color, var(--inner-cool)), var(--inner-warm));
  box-shadow: 0 0 10px color-mix(in srgb, var(--note-kind-color, var(--inner-cool)) 24%, transparent);
  transform: scaleY(var(--reading-progress));
}

.reading-path-node {
  position: absolute;
  left: 50%;
  width: 7px;
  height: 7px;
  border: 1px solid color-mix(in srgb, var(--note-kind-color, var(--inner-cool)) 66%, transparent);
  border-radius: 50%;
  background: var(--bg);
  transform: translate(-50%, -50%);
}

/* Keke: orbit laboratory. */
.project-page {
  overflow: hidden;
}

.project-page::after {
  position: absolute;
  left: 50%;
  top: 30%;
  z-index: 0;
  width: 118vw;
  height: 240px;
  content: "";
  border-top: 1px dashed color-mix(in srgb, var(--inner-warm) 24%, transparent);
  border-radius: 50%;
  opacity: 0.56;
  pointer-events: none;
  transform: translateX(-50%) rotate(2deg);
}

.project-lab-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 390px);
  align-items: center;
  gap: clamp(54px, 8vw, 112px);
  min-height: calc(100svh - 66px);
  padding: 82px 0 108px;
}

.project-hero-copy {
  max-width: 760px;
}

.project-hero-copy > p:last-of-type {
  max-width: 680px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.82;
}

.project-hero-copy h1 {
  max-width: 820px;
  text-wrap: balance;
}

.project-status-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 30px;
  color: var(--quiet);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

.project-status-line span:not(.project-status-dot) + span:not(.project-status-dot)::before {
  margin-right: 18px;
  content: "·";
  color: var(--line-strong);
}

.project-status-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--inner-warm);
  box-shadow: 0 0 0 6px var(--inner-warm-soft), 0 0 16px color-mix(in srgb, var(--inner-warm) 28%, transparent);
  animation: project-status-breathe 3.4s ease-in-out infinite;
}

.project-observation {
  position: relative;
  display: grid;
  width: min(34vw, 370px);
  aspect-ratio: 1;
  place-items: center;
  justify-self: end;
}

.project-observation::before,
.project-observation::after,
.project-observation-orbit {
  position: absolute;
  inset: 10%;
  content: "";
  border: 1px solid color-mix(in srgb, var(--inner-warm) 28%, transparent);
  border-radius: 50%;
  transform: rotate(-12deg) scaleY(0.66);
}

.project-observation::after {
  inset: 22%;
  border-color: color-mix(in srgb, var(--inner-cool) 24%, transparent);
  transform: rotate(18deg) scaleY(0.72);
}

.project-observation-orbit {
  inset: 3%;
  border-style: dashed;
  border-color: color-mix(in srgb, var(--inner-cool) 16%, transparent);
  transform: rotate(31deg) scaleY(0.58);
  animation: observation-orbit-breathe 12s ease-in-out infinite alternate;
}

.project-observation-core {
  position: relative;
  z-index: 2;
  display: grid;
  justify-items: center;
  gap: 18px;
}

.project-observation-icon {
  width: clamp(92px, 9vw, 122px);
  height: clamp(92px, 9vw, 122px);
  margin: 0;
  border-radius: 24%;
  box-shadow:
    0 18px 54px rgba(40, 46, 70, 0.18),
    0 0 0 1px color-mix(in srgb, var(--inner-warm) 16%, transparent),
    0 0 44px color-mix(in srgb, var(--inner-warm) 16%, transparent);
}

.project-observation-caption {
  color: var(--quiet);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.project-source-link {
  margin-top: 30px;
}

.project-trajectory {
  position: relative;
  border-top: 0;
}

.project-trajectory::before {
  position: absolute;
  left: 17px;
  top: 0;
  bottom: 0;
  width: 1px;
  content: "";
  background: linear-gradient(180deg, transparent, var(--inner-path) 6%, var(--inner-path) 94%, transparent);
}

.project-trajectory .story-block {
  position: relative;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 34px;
  border-bottom-color: color-mix(in srgb, var(--line) 75%, transparent);
}

.project-trajectory .story-number {
  position: relative;
  padding-left: 42px;
}

.project-trajectory .story-number::before {
  position: absolute;
  left: 12px;
  top: 0.45em;
  width: 11px;
  height: 11px;
  content: "";
  border: 2px solid var(--bg);
  border-radius: 50%;
  background: color-mix(in srgb, var(--inner-cool) 62%, var(--inner-warm));
  box-shadow: 0 0 0 1px var(--inner-path), 0 0 0 7px color-mix(in srgb, var(--inner-cool) 5%, transparent);
  transition: scale 360ms ease, box-shadow 360ms ease;
}

.project-trajectory .story-block.is-visible .story-number::before {
  scale: 1.12;
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--inner-cool) 58%, var(--inner-warm)),
    0 0 0 9px color-mix(in srgb, var(--inner-cool) 7%, transparent),
    0 0 20px color-mix(in srgb, var(--inner-warm) 18%, transparent);
}

.project-trajectory .story-block > div {
  max-width: 790px;
}

.project-ending {
  border-top: 0;
}

@keyframes inner-current-drift {
  0% { transform: translate3d(-54%, -4%, 0) rotate(-3.4deg) scaleX(0.98); }
  52% { transform: translate3d(-48%, 5%, 0) rotate(-1.8deg) scaleX(1.04); }
  100% { transform: translate3d(-51%, -1%, 0) rotate(-2.8deg) scaleX(1.01); }
}

@keyframes project-status-breathe {
  0%, 100% { opacity: 0.72; scale: 0.94; }
  50% { opacity: 1; scale: 1.08; }
}

@keyframes observation-orbit-breathe {
  0% { opacity: 0.38; transform: rotate(29deg) scaleY(0.56); }
  100% { opacity: 0.78; transform: rotate(33deg) scaleY(0.61); }
}

@media (max-width: 960px) {
  .project-lab-hero {
    grid-template-columns: minmax(0, 1fr) 270px;
    gap: 50px;
  }

  .project-observation {
    width: 270px;
  }
}

@media (max-width: 820px) {
  .writing-page-direct .archive-list {
    width: 100%;
  }

  .reading-path {
    display: none;
  }

  .article-body h2::before,
  .article-body h3::before {
    display: none;
  }

  .project-lab-hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 72px;
  }

  .project-observation {
    width: min(76vw, 330px);
    justify-self: center;
    order: -1;
  }
}

@media (max-width: 560px) {
  .writing-page-direct {
    padding-top: 30px;
  }

  .writing-page-direct .archive-list {
    padding-left: 42px;
  }

  .writing-page-direct .archive-list::before {
    left: 13px;
  }

  .writing-page-direct .archive-row-v2 {
    min-height: 0;
    gap: 14px;
    padding: 26px 0;
  }

  .writing-page-direct .archive-row-v2::before {
    left: -28px;
    top: 37px;
    width: 22px;
  }

  .writing-page-direct .archive-row-meta .note-kind-marker {
    left: -33px;
    top: 33px;
    width: 9px;
    height: 9px;
  }

  .writing-page-direct .archive-row-v2 p {
    display: block;
    font-size: 0.82rem;
  }

  .article-main::after {
    display: none;
  }

  .note-article header {
    padding-bottom: 40px;
  }

  .project-lab-hero {
    gap: 34px;
    padding: 58px 0 82px;
  }

  .project-observation {
    width: min(82vw, 300px);
  }

  .project-status-line {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .project-status-line span:not(.project-status-dot) + span:not(.project-status-dot)::before {
    display: none;
  }

  .project-trajectory::before {
    left: 6px;
  }

  .project-trajectory .story-block {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-left: 30px;
  }

  .project-trajectory .story-number {
    padding-left: 0;
  }

  .project-trajectory .story-number::before {
    left: -29px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .writing-page-direct::before,
  .article-main::before,
  .project-page::before,
  .project-observation-orbit,
  .project-status-dot {
    animation: none;
  }
}