/* Portfolio content below morph scrub — matches --sw-bg / dark ink */
:root {
  --sw-bg: #f2f2f2;
  --sw-ink: #1a1a1a;
  --sw-ink-soft: #6b6b6b;
  --sw-accent: #1a1a1a;
  --site-line: rgba(26, 26, 26, 0.1);
  --site-line-strong: rgba(26, 26, 26, 0.18);
  --site-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --site-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--sw-bg);
  color: var(--sw-ink);
  font-family: var(--site-font);
  -webkit-font-smoothing: antialiased;
}

/* Hide scrub-engine route chrome (always mounted; nav:false handles .sw-nav) */
.sw-route {
  display: none !important;
}

/* Sit above fixed scrub stage/copy so content is readable after the hero */
#site {
  position: relative;
  z-index: 35;
  background: var(--sw-bg);
  color: var(--sw-ink);
  padding: 0 0 96px;
  border-top: 1px solid var(--site-line);
}

.site-wrap {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.site-section {
  padding: clamp(56px, 9vw, 104px) 0 clamp(28px, 5vw, 48px);
}

.site-section + .site-section {
  border-top: 1px solid var(--site-line);
}

#work,
#about,
#explore {
  scroll-margin-top: 8px;
}

/* Explore hangs off Work as a footnote, not a peer chapter */
.site-section--aside {
  padding-top: 4px;
  padding-bottom: clamp(36px, 6vw, 64px);
  border-top: 0 !important;
}

.site-kicker {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sw-ink-soft);
  margin-bottom: 10px;
}

.site-section__title {
  font-size: clamp(1.7rem, 3.6vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 10px;
  line-height: 1.12;
}

.site-section__lead {
  margin: 0;
  max-width: 46ch;
  color: var(--sw-ink-soft);
  font-size: 0.98rem;
  line-height: 1.6;
}

/* —— Language toggle: light-grey pill matching hero —— */
.lang-toggle {
  position: fixed;
  top: max(16px, env(safe-area-inset-top, 0px));
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 5px 6px;
  background: color-mix(in srgb, #fff 55%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid color-mix(in srgb, var(--sw-accent) 16%, transparent);
  border-radius: 999px;
  font-family: var(--site-font);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.4) inset;
}

.lang-toggle__btn {
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--sw-ink-soft);
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 6px 12px;
  border-radius: 999px;
  transition: color 0.2s, background 0.2s;
  line-height: 1.2;
}

.lang-toggle__btn:hover {
  color: var(--sw-ink);
}

.lang-toggle__btn.is-active {
  color: #fff;
  background: var(--sw-accent);
}

.lang-toggle__btn:focus-visible {
  outline: 2px solid var(--sw-ink);
  outline-offset: 2px;
}

.lang-toggle__sep {
  font-size: 0.72rem;
  color: rgba(26, 26, 26, 0.28);
  user-select: none;
  padding: 0 1px;
}

/* —— Right page index: hairline spine + mono numerals (journal language) —— */
.page-nav {
  position: fixed;
  top: 50%;
  right: max(18px, env(safe-area-inset-right, 0px));
  transform: translateY(-50%);
  z-index: 55;
  pointer-events: none;
}

.page-nav__list {
  --spine-x: 0px;
  --spine-inset: 18px;
  list-style: none;
  margin: 0;
  padding: 4px 0 4px var(--spine-inset);
  display: flex;
  flex-direction: column;
  gap: 6px;
  pointer-events: auto;
  position: relative;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.page-nav__list::before {
  content: "";
  position: absolute;
  left: var(--spine-x);
  top: 12px;
  bottom: 12px;
  width: 1.5px;
  background: var(--site-line-strong);
}

.page-nav__item {
  margin: 0;
  padding: 0;
}

.page-nav__link {
  display: grid;
  grid-template-columns: 2em minmax(0, auto);
  align-items: baseline;
  column-gap: 12px;
  padding: 10px 4px 10px 12px;
  text-decoration: none;
  color: var(--sw-ink-soft);
  font-family: var(--site-font);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.25;
  transition: color 0.18s ease;
  white-space: nowrap;
  position: relative;
  background: transparent;
  border-radius: 0;
}

.page-nav__link::before {
  content: "";
  position: absolute;
  left: calc(0px - var(--spine-inset));
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--sw-ink) 22%, transparent);
  box-shadow: 0 0 0 3px var(--sw-bg);
  transition: background 0.18s ease, transform 0.18s ease;
}

.page-nav__link:hover {
  color: var(--sw-ink);
}

.page-nav__link:hover::before {
  background: color-mix(in srgb, var(--sw-ink) 55%, transparent);
}

.page-nav__link:focus-visible {
  outline: 2px solid var(--sw-ink);
  outline-offset: 3px;
}

.page-nav__num {
  font-family: var(--site-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: inherit;
  opacity: 0.75;
  text-align: right;
  user-select: none;
}

.page-nav__label {
  max-width: 8em;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-nav__link.is-active {
  color: var(--sw-ink);
  font-weight: 600;
}

.page-nav__link.is-active::before {
  background: var(--sw-ink);
  transform: scale(1.05);
}

.page-nav__link.is-active .page-nav__num {
  opacity: 1;
  color: var(--sw-ink);
}

/* —— Chapter frame: sticky vertical rail + numeral —— */
.section-frame {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  column-gap: clamp(20px, 3vw, 36px);
  align-items: start;
}

.section-body {
  min-width: 0;
}

.section-rail {
  position: sticky;
  top: 28vh;
  align-self: start;
  height: max-content;
  padding-top: 6px;
  width: 2rem;
  overflow: hidden;
  pointer-events: none;
}

.section-rail__word {
  display: block;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--sw-ink-soft);
  white-space: nowrap;
}

.section-head {
  display: flex;
  align-items: flex-start;
  gap: 8px 24px;
  margin-bottom: clamp(36px, 6vw, 64px);
}

.section-num {
  flex: 0 0 auto;
  font-family: var(--site-mono);
  font-size: clamp(2.6rem, 6.5vw, 4.2rem);
  font-weight: 400;
  line-height: 0.82;
  letter-spacing: -0.08em;
  color: var(--sw-ink);
  opacity: 0.12;
  user-select: none;
  margin-top: 2px;
}

.section-head__copy {
  min-width: 0;
  padding-top: 6px;
}

/* —— Work: single-rhythm numbered journal —— */
.work-index {
  --num-col: 3.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.work-entry {
  display: grid;
  grid-template-columns: var(--num-col) minmax(0, 1fr);
  column-gap: 16px;
  align-items: start;
  padding: 28px 0;
  border-top: 1px solid var(--site-line);
  position: relative;
}

.work-entry:first-child {
  border-top-color: var(--site-line-strong);
}

.work-entry:last-child {
  border-bottom: 1px solid var(--site-line);
}

.work-num {
  grid-column: 1;
  font-family: var(--site-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--sw-ink-soft);
  line-height: 1.4;
  padding-top: 0.35em;
  user-select: none;
  text-align: right;
  overflow: hidden;
  white-space: nowrap;
}

.work-entry__body {
  grid-column: 2;
  min-width: 0;
}

.work-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--sw-ink);
}

.work-why {
  margin: 8px 0 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: color-mix(in srgb, var(--sw-ink) 82%, var(--sw-ink-soft));
  max-width: 58ch;
  text-wrap: pretty;
}

.work-repo {
  font-family: var(--site-mono);
  font-size: 0.7rem;
  color: var(--sw-ink-soft);
  letter-spacing: 0.01em;
}

.work-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0;
  margin: 12px 0 0;
  font-size: 0.75rem;
  color: var(--sw-ink-soft);
  line-height: 1.6;
}

.work-foot > * + *::before {
  content: "·";
  margin: 0 0.55em;
  color: rgba(26, 26, 26, 0.28);
  font-weight: 400;
}

.work-lang,
.work-source {
  font-family: var(--site-mono);
  font-size: 0.7rem;
  letter-spacing: 0.02em;
}

.work-foot a {
  color: var(--sw-ink);
  text-decoration: none;
  box-shadow: inset 0 -1px 0 rgba(26, 26, 26, 0.22);
  font-weight: 500;
}

.work-foot a:hover {
  box-shadow: inset 0 -1px 0 var(--sw-ink);
}

.work-foot a:focus-visible {
  outline: 2px solid var(--sw-ink);
  outline-offset: 3px;
}

/* —— Explore: one quiet aside —— */
.explore-aside {
  max-width: 46ch;
  padding: 4px 0 4px 18px;
  border-left: 1px solid var(--site-line-strong);
}

.explore-aside__kicker {
  display: block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sw-ink-soft);
  margin-bottom: 8px;
}

.explore-aside__lead {
  margin: 0 0 14px;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--sw-ink-soft);
}

.explore-aside__name {
  display: inline-block;
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--sw-ink);
  text-decoration: none;
  box-shadow: inset 0 -1px 0 rgba(26, 26, 26, 0.22);
}

.explore-aside__name:hover {
  box-shadow: inset 0 -1px 0 var(--sw-ink);
}

a.explore-aside__name:focus-visible {
  outline: 2px solid var(--sw-ink);
  outline-offset: 3px;
}

.explore-aside__note {
  display: block;
  margin: 8px 0 0;
  font-size: 0.9rem;
  line-height: 1.55;
  color: color-mix(in srgb, var(--sw-ink) 86%, var(--sw-ink-soft));
}

/* —— About: first-person block + one spine —— */
.about-intro {
  margin: 0 0 clamp(48px, 8vw, 80px);
  max-width: 38em;
}

.about-bio {
  margin: 0;
  font-size: clamp(1.18rem, 2.4vw, 1.5rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.48;
  max-width: 28em;
}

.about-brand {
  margin: 28px 0 0;
  max-width: 42em;
}

.about-brand__line {
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.65;
  color: color-mix(in srgb, var(--sw-ink) 84%, var(--sw-ink-soft));
}

.timeline {
  --when-col: 6.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: calc(var(--when-col) + 20px + 6px);
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--site-line-strong);
}

.timeline-item {
  display: grid;
  grid-template-columns: var(--when-col) 12px minmax(0, 1fr);
  grid-template-areas: "when mark body";
  column-gap: 20px;
  padding: 26px 0;
  position: relative;
}

.timeline-item__when {
  grid-area: when;
  font-family: var(--site-mono);
  font-size: 0.74rem;
  font-variant-numeric: tabular-nums;
  color: var(--sw-ink-soft);
  text-align: right;
  line-height: 1.45;
  padding-top: 3px;
}

.timeline-item__end {
  display: block;
}

.timeline-item__end::before {
  content: "– ";
}

.timeline-item__mark {
  grid-area: mark;
  width: 7px;
  height: 7px;
  margin: 8px auto 0;
  border-radius: 50%;
  background: var(--sw-ink);
  box-shadow: 0 0 0 4px var(--sw-bg);
}

.timeline-item__body {
  grid-area: body;
  min-width: 0;
  padding-bottom: 4px;
}

.timeline-item__kind {
  display: block;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sw-ink-soft);
  margin-bottom: 6px;
}

.timeline-item__primary {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.timeline-item__secondary {
  margin: 6px 0 0;
  font-size: 0.92rem;
  line-height: 1.45;
  color: color-mix(in srgb, var(--sw-ink) 86%, var(--sw-ink-soft));
}

.timeline-item__meta {
  margin: 6px 0 0;
  font-size: 0.78rem;
  color: var(--sw-ink-soft);
}

.certs-line {
  margin: 40px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--site-line);
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--sw-ink-soft);
  max-width: 58em;
}

.certs-line__label {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-right: 0.85em;
  color: var(--sw-ink-soft);
}

.cert-item + .cert-item::before {
  content: ", ";
  color: rgba(26, 26, 26, 0.35);
}

.site-footer {
  margin-top: 56px;
  padding: 28px 0 8px;
  border-top: 1px solid var(--site-line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  color: var(--sw-ink-soft);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--sw-ink);
  font-weight: 600;
  text-decoration: none;
  box-shadow: inset 0 -1px 0 rgba(26, 26, 26, 0.22);
}

.site-footer a:hover {
  box-shadow: inset 0 -1px 0 var(--sw-ink);
}

.site-loading,
.site-error {
  padding: 48px 20px;
  text-align: center;
  color: var(--sw-ink-soft);
}

.site-error {
  color: #8a2a2a;
}

@media (max-width: 800px) {
  .section-frame {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-rail {
    display: none;
  }

  .lang-toggle {
    top: max(12px, env(safe-area-inset-top, 0px));
  }

  .page-nav {
    right: max(10px, env(safe-area-inset-right, 0px));
  }

  .page-nav__list {
    --spine-inset: 12px;
    padding: 2px 0 2px var(--spine-inset);
  }

  .page-nav__link {
    grid-template-columns: 1.6em minmax(0, auto);
    column-gap: 10px;
    padding: 9px 0 9px 8px;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
  }

  .page-nav__link::before {
    width: 6px;
    height: 6px;
    margin-top: -3px;
  }

  .page-nav__num {
    font-size: 0.74rem;
  }

  .page-nav__label {
    max-width: 5.5em;
  }
}

@media (max-width: 640px) {
  .site-wrap {
    width: calc(100% - 32px);
  }

  .work-index {
    --num-col: 2.25rem;
  }

  .work-entry {
    column-gap: 12px;
    padding: 22px 0;
  }

  .work-num {
    font-size: 0.72rem;
    padding-top: 0.4em;
  }

  .work-title {
    font-size: 1rem;
  }

  .work-why {
    max-width: none;
    font-size: 0.88rem;
  }

  .section-head {
    flex-direction: column;
    gap: 4px;
    margin-bottom: 32px;
  }

  .section-num {
    font-size: 2.2rem;
  }

  .timeline {
    --when-col: 0px;
    padding-left: 0;
  }

  .timeline::before {
    left: 3px;
  }

  .timeline-item {
    grid-template-columns: 12px minmax(0, 1fr);
    grid-template-areas:
      "mark when"
      "mark body";
    column-gap: 14px;
    padding: 22px 0 22px 4px;
  }

  .timeline-item__when {
    text-align: left;
    padding-top: 0;
    margin-bottom: 2px;
  }

  .timeline-item__end {
    display: inline;
  }

  .timeline-item__mark {
    margin-top: 5px;
  }

  .about-bio {
    max-width: none;
  }

  .explore-aside {
    padding-left: 14px;
  }

  .lang-toggle__btn {
    padding: 5px 10px;
    font-size: 0.74rem;
  }
}