:root {
  --ink: #111111;
  --ink-soft: #3f3f3f;
  --muted: #7a7a7a;
  --faint: #a3a3a3;
  --line: rgba(17, 17, 17, 0.1);
  --line-strong: rgba(17, 17, 17, 0.26);
  --bg-top: #efefee;
  --bg-mid: #f5f5f4;
  --bg-bottom: #fbfbfa;
  --display: "Times New Roman", Times, "Noto Serif SC", "Songti SC", serif;
  --serif: "Times New Roman", Times, "Noto Serif SC", "Songti SC", serif;
  --sans: "Times New Roman", Times, "Noto Sans SC", "PingFang SC", sans-serif;
  --max: 74rem;
  --pad-x: clamp(1.5rem, 5vw, 4.5rem);
  --header-h: 4.25rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.02rem;
  font-weight: 300;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background:
    radial-gradient(120% 60% at 50% -20%, rgba(0, 0, 0, 0.06), transparent 60%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-mid) 45%, var(--bg-bottom) 100%);
  background-attachment: fixed;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--ink);
  z-index: 40;
  transition: width 0.1s linear;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

img {
  max-width: 100%;
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

/* ---------- icons ---------- */

.icon-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.icon {
  width: 1.05em;
  height: 1.05em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -0.15em;
}

/* ---------- micro labels ---------- */

.meta-rule,
.section-label,
.project-domain,
.hl-num,
.metrics dt,
.footer-note {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.4;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
  padding: 0 var(--pad-x);
  backdrop-filter: blur(14px);
  background: rgba(250, 250, 249, 0.78);
  border-bottom: 1px solid var(--line);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.85rem;
  height: 1.85rem;
  border: 1px solid var(--line-strong);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.logo-name {
  font-family: var(--display);
  font-size: 1.2rem;
  letter-spacing: 0.01em;
}

.nav {
  display: flex;
  gap: clamp(0.75rem, 2.5vw, 2rem);
}

.nav a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
  padding: 0.3rem 0;
  transition: color 0.25s ease;
}

.nav a i {
  font-style: normal;
  font-family: var(--display);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--faint);
  transition: color 0.25s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0.1rem;
  width: 100%;
  height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.nav a:hover,
.nav a.is-active {
  color: var(--ink);
}

.nav a:hover i,
.nav a.is-active i {
  color: var(--ink);
}

.nav a:hover::after,
.nav a.is-active::after {
  transform: scaleX(1);
}

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

.section {
  padding: clamp(4.5rem, 11vh, 7.5rem) var(--pad-x);
}

.about {
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: clamp(2.5rem, 7vh, 4.5rem);
  padding-bottom: clamp(3.5rem, 9vh, 6rem);
}

.about-inner {
  width: min(100%, 68rem);
  margin-inline: auto;
}

.about-hero {
  display: grid;
  grid-template-columns: minmax(12rem, 18rem) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  margin-bottom: clamp(2.25rem, 5vh, 3.25rem);
}

.about-copy {
  text-align: left;
  min-width: 0;
}

.contact-inner {
  width: min(100%, 44rem);
  margin-inline: auto;
  text-align: center;
}

/* ---------- hero ---------- */

.meta-rule {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 1.1rem;
  margin: 0 0 1.25rem;
}

.meta-rule i {
  display: block;
  width: clamp(2.5rem, 8vw, 5rem);
  height: 1px;
  background: var(--line-strong);
}

.portrait {
  position: relative;
  width: 100%;
  max-width: 18rem;
  aspect-ratio: 4 / 5;
  margin: 0;
}

.portrait::before {
  content: "";
  position: absolute;
  inset: 0.75rem -0.75rem -0.75rem 0.75rem;
  border: 1px solid var(--line-strong);
}

.portrait img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 42% 18%;
}

.name {
  margin: 0 0 1rem;
  font-family: var(--display);
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: 0.005em;
  color: var(--ink);
}

.role-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.55rem 1.25rem;
  margin: 0 0 1.35rem;
  padding-bottom: 1.35rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.88rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.role-line span {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
}

.role-line .icon {
  width: 1.15em;
  height: 1.15em;
  color: var(--muted);
}

.lead {
  margin: 0 0 0.85rem;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  font-weight: 300;
  line-height: 1.9;
  max-width: 38rem;
}

.sub {
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 0.94rem;
  max-width: 36rem;
}

.highlights {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
  text-align: left;
  border-top: 1px solid var(--line-strong);
}

.highlights li {
  padding: 1.1rem 1.35rem 0 0;
}

.highlights li + li {
  border-left: 1px solid var(--line);
  padding-left: 1.35rem;
}

.hl-num {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
  color: var(--ink);
}

.hl-num .icon {
  width: 1.5em;
  height: 1.5em;
}

.hl-num > span {
  color: var(--faint);
  font-family: var(--display);
  letter-spacing: 0.14em;
}

.highlights p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.65;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 2.9rem;
  padding: 0.7rem 1.5rem;
  border-radius: 0;
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  text-decoration: none;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn i {
  font-style: normal;
  font-size: 0.85em;
  transition: transform 0.25s ease;
}

.btn-primary {
  background: var(--ink);
  color: #fafafa;
}

.btn-primary:hover {
  background: #2c2c2c;
}

.btn-primary:hover i {
  transform: translateY(0.2em);
}

.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: transparent;
}

.btn-ghost:hover {
  border-color: var(--ink);
  background: rgba(17, 17, 17, 0.04);
}

.btn-ghost:hover i {
  transform: translate(0.2em, -0.2em);
}

.footnote {
  margin: 0;
  color: var(--faint);
  font-size: 0.82rem;
  line-height: 1.6;
}

/* ---------- section heads ---------- */

.section-head {
  width: min(100%, var(--max));
  margin: 0 auto clamp(2.5rem, 6vh, 3.75rem);
}

.section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1rem;
}

.section-label i {
  font-style: normal;
  font-family: var(--display);
  padding-right: 0.75rem;
  border-right: 1px solid var(--line-strong);
  color: var(--ink);
}

.section-label.centered {
  justify-content: center;
}

.section-head h2,
.contact-inner h2 {
  margin: 0 0 0.75rem;
  font-family: var(--serif);
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.section-desc {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
  max-width: 34rem;
}

.section-duties {
  margin-top: 1.35rem;
  max-width: 38rem;
}

.section-duties-label {
  margin: 0 0 0.65rem;
  color: var(--ink);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-duties ul {
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--ink-soft);
  font-size: 0.93rem;
  line-height: 1.65;
}

.section-duties li {
  position: relative;
  padding-left: 0.95rem;
}

.section-duties li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.28rem;
  height: 0.28rem;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.4;
}

.section-duties li + li {
  margin-top: 0.4rem;
}

.contact .section-desc {
  margin-inline: auto;
}

/* ---------- projects ---------- */

.project-list {
  width: min(100%, var(--max));
  margin-inline: auto;
  border-bottom: 1px solid var(--line);
}

.project-list--index {
  border-top: 1px solid var(--line);
}

.project-card {
  display: grid;
  grid-template-columns: minmax(0, 10rem) minmax(0, 1fr) auto;
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: center;
  padding: clamp(1.5rem, 3.5vh, 2.25rem) 0;
  border-top: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
  transition: background 0.25s ease;
}

.project-card:first-child {
  border-top: 0;
}

.project-card:hover {
  background: rgba(17, 17, 17, 0.03);
}

.project-card .project-meta {
  position: static;
}

.project-card .project-index {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  color: transparent;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.42);
  transition: color 0.3s ease, -webkit-text-stroke-color 0.3s ease;
}

.project-card:hover .project-index {
  color: var(--ink);
  -webkit-text-stroke-color: transparent;
}

.project-card .project-domain {
  padding-top: 0.55rem;
  border-top: 1px solid var(--line);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.project-card .project-body h3 {
  margin: 0 0 0.35rem;
}

.project-card .project-tagline {
  margin: 0 0 0.35rem;
}

.project-card .project-role {
  display: inline-block;
  margin: 0;
  padding: 0;
  border: 0;
  color: var(--faint);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

.project-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.88rem;
  white-space: nowrap;
  transition: color 0.25s ease, transform 0.25s ease;
}

.project-card-cta i {
  font-style: normal;
  transition: transform 0.25s ease;
}

.project-card:hover .project-card-cta {
  color: var(--ink);
}

.project-card:hover .project-card-cta i {
  transform: translateX(0.25em);
}

.project {
  display: grid;
  grid-template-columns: minmax(0, 12rem) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  padding: clamp(2.25rem, 5vh, 3.5rem) 0;
  border-top: 1px solid var(--line);
}

.project-meta {
  position: sticky;
  top: calc(var(--header-h) + 2rem);
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project-index {
  font-family: var(--display);
  font-size: clamp(2.5rem, 4.5vw, 3.5rem);
  line-height: 0.9;
  letter-spacing: 0.01em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.42);
  transition: color 0.35s ease, -webkit-text-stroke-color 0.35s ease;
}

.project:hover .project-index {
  color: var(--ink);
  -webkit-text-stroke-color: transparent;
}

.project-domain {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.project-domain .icon {
  width: 1.35em;
  height: 1.35em;
  color: var(--faint);
}

.project-body h3 {
  margin: 0 0 0.5rem;
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2.8vw, 1.85rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  overflow-wrap: break-word;
}

.project-tagline {
  margin: 0 0 0.5rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.project-role {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 1.1rem;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.project-role .icon {
  width: 1.15em;
  height: 1.15em;
  color: var(--faint);
}

.project-desc {
  margin: 0 0 1.5rem;
  color: var(--ink-soft);
  max-width: 46rem;
}

.project-desc,
.project-tagline,
.compact-list,
.project-split ul {
  overflow-wrap: anywhere;
}

.project-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2.5rem;
  margin-bottom: 1.5rem;
}

.project-split h4,
.project-block h4,
.project-body h4 {
  margin: 0 0 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
}

.project-block {
  margin-bottom: 1.5rem;
}

.project-split ul,
.compact-list {
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--ink-soft);
  font-size: 0.93rem;
  line-height: 1.7;
}

.project-split li,
.compact-list li {
  position: relative;
  padding-left: 1rem;
}

.project-split li::before,
.compact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 0.35rem;
  height: 1px;
  background: var(--line-strong);
}

.project-split li + li,
.compact-list li + li {
  margin-top: 0.45rem;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 0 1rem;
  border-top: 1px solid var(--line-strong);
}

.metrics div {
  padding: 0.9rem 1rem 0 0;
}

.metrics div + div {
  border-left: 1px solid var(--line);
  padding-left: 1rem;
}

.metrics dt {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 0.4rem;
}

.metrics dt .icon {
  width: 1.35em;
  height: 1.35em;
  color: var(--faint);
}

.metrics dd {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.2;
  color: var(--ink);
}

.note {
  margin: 0 0 1.75rem;
  color: var(--faint);
  font-size: 0.8rem;
}

.doc-link-row {
  margin: 0 0 1.5rem;
}

.doc-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line-strong);
  color: var(--ink);
  font-size: 0.92rem;
  text-decoration: none;
  transition: border-color 0.25s ease, color 0.25s ease;
}

.doc-link .icon {
  width: 1.15em;
  height: 1.15em;
  color: var(--muted);
}

.doc-link i {
  font-style: normal;
  font-size: 0.85em;
  color: var(--muted);
  transition: transform 0.25s ease, color 0.25s ease;
}

.doc-link:hover {
  border-bottom-color: var(--ink);
}

.doc-link:hover i {
  color: var(--ink);
  transform: translate(0.15em, -0.15em);
}

/* ---------- embedded project evidence ---------- */

.evidence {
  margin: 1.75rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.evidence-label {
  margin: 0 0 1rem;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.evidence-stack {
  display: grid;
  gap: 1.25rem;
}

.evidence-item {
  margin: 0;
}

.evidence-item--wide {
  margin-top: 1.25rem;
}

.evidence-frame {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: #f3f3f2;
}

.evidence-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
}

.evidence-frame--diagram {
  width: 100%;
  height: 22rem;
  padding: 0.85rem;
}

.evidence-phones {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.evidence-frame--phone {
  width: 100%;
  height: 26rem;
  padding: 0.65rem;
}

.evidence-frame--wide {
  width: 100%;
  height: 18rem;
  padding: 0.85rem;
}

.evidence-item figcaption {
  margin-top: 0.55rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
  text-align: center;
}

/* ---------- project detail pages ---------- */

.project-page .project-detail {
  padding-top: clamp(2.5rem, 6vh, 4rem);
  padding-bottom: clamp(4rem, 10vh, 6.5rem);
}

.project-detail-inner {
  width: min(100%, 48rem);
  margin-inline: auto;
}

.back-link {
  margin: 0 0 1.75rem;
}

.back-link a {
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.back-link a:hover {
  color: var(--ink);
  border-bottom-color: var(--line-strong);
}

.detail-domain {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 0.85rem;
  padding: 0;
  border: 0;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.project-detail-inner h1 {
  margin: 0 0 0.65rem;
  font-family: var(--serif);
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.project-detail-inner .project-tagline {
  margin-bottom: 0.75rem;
}

.project-detail-inner .project-role {
  margin-bottom: 1.5rem;
}

.project-detail-inner .compact-list {
  margin-bottom: 1.5rem;
}

.retrospective {
  margin-top: 0.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-strong);
}

.retrospective > h4 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.85rem;
  padding-bottom: 0;
  border-bottom: 0;
  font-family: var(--serif);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: none;
  color: var(--ink);
}

.retrospective > h4 .icon {
  width: 1.2em;
  height: 1.2em;
  color: var(--muted);
}

.retro-intro {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.retro-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.15rem;
  counter-reset: retro;
}

.retro-list li {
  position: relative;
  padding-left: 2.4rem;
  counter-increment: retro;
}

.retro-list li::before {
  content: counter(retro, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.1em;
  font-family: var(--display);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  color: var(--faint);
}

.retro-list h5 {
  margin: 0 0 0.4rem;
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

.retro-list p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.75;
}

@media (max-width: 560px) {
  .retrospective {
    padding-top: 1.25rem;
  }

  .retro-list li {
    padding-left: 2.1rem;
  }

  .retro-list h5 {
    font-size: 0.95rem;
  }

  .retro-list p {
    font-size: 0.9rem;
  }
}

/* ---------- contact ---------- */

.contact {
  display: flex;
  justify-content: center;
  padding-bottom: clamp(5rem, 13vh, 8rem);
}

.contact-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin-top: clamp(2rem, 5vh, 2.75rem);
  border-top: 1px solid var(--line);
  width: 100%;
}

.contact-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  width: 100%;
  padding: 1.1rem 0.5rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--display);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
  word-break: break-word;
  transition: background 0.25s ease;
}

.contact-links .icon {
  width: 0.8em;
  height: 0.8em;
  color: var(--muted);
}

.contact-links a i {
  font-style: normal;
  font-size: 0.6em;
  color: var(--muted);
  transition: transform 0.3s ease, color 0.25s ease;
}

.contact-links a:hover {
  background: rgba(17, 17, 17, 0.035);
}

.contact-links a:hover i {
  transform: translate(0.25em, -0.25em);
  color: var(--ink);
}

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

.site-footer {
  padding: 1.5rem var(--pad-x) 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 0.8rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(100%, var(--max));
  margin-inline: auto;
}

.footer-inner p {
  margin: 0;
}

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

.reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 0.8s cubic-bezier(0.2, 0.7, 0.3, 1),
    transform 0.8s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .project {
    grid-template-columns: minmax(0, 8rem) minmax(0, 1fr);
    gap: 1.5rem;
  }

  .project-index {
    font-size: 2.4rem;
  }
}

@media (max-width: 800px) {
  .about {
    min-height: auto;
    padding-top: 2.75rem;
    padding-bottom: 3.5rem;
  }

  .about-hero {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    justify-items: center;
    text-align: center;
  }

  .about-copy {
    text-align: center;
  }

  .meta-rule,
  .role-line,
  .cta-row {
    justify-content: center;
  }

  .lead,
  .sub {
    margin-left: auto;
    margin-right: auto;
  }

  .portrait {
    width: min(100%, 11rem);
    margin-inline: auto;
  }

  .project {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 2rem 0;
  }

  .project-card {
    grid-template-columns: minmax(0, 5.5rem) minmax(0, 1fr);
    gap: 0.85rem 1rem;
    align-items: start;
  }

  .project-card-cta {
    grid-column: 2;
    justify-self: start;
    margin-top: 0.35rem;
  }

  .project-card .project-index {
    font-size: 1.85rem;
    color: var(--ink);
    -webkit-text-stroke-color: transparent;
  }

  .project-card .project-domain {
    padding-top: 0;
    border-top: 0;
  }

  .project-meta {
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
  }

  .project-index {
    font-size: 2rem;
    color: var(--ink);
    -webkit-text-stroke-color: transparent;
  }

  .project-card .project-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .project-domain {
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid var(--line-strong);
    padding-left: 1rem;
  }

  .project-card .project-domain {
    border-left: 0;
    padding-left: 0;
  }

  .project-page .detail-domain {
    border-left: 0;
    padding-left: 0;
  }

  .project-split {
    grid-template-columns: 1fr;
    gap: 1.35rem;
  }

}

@media (max-width: 620px) {
  .highlights {
    grid-template-columns: 1fr;
    border-top: 0;
  }

  .highlights li {
    padding: 0.95rem 0;
    border-top: 1px solid var(--line);
  }

  .highlights li + li {
    border-left: 0;
    padding-left: 0;
  }

  .hl-num {
    margin-bottom: 0.35rem;
  }

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

  .metrics div {
    padding: 0.75rem 0;
    border-top: 1px solid var(--line);
  }

  .metrics div:first-child {
    border-top: 0;
  }

  .metrics div + div {
    border-left: 0;
    padding-left: 0;
  }

  .metrics dt {
    margin-bottom: 0.15rem;
  }
}

@media (max-width: 560px) {
  :root {
    --header-h: 3.5rem;
    --pad-x: max(1.35rem, env(safe-area-inset-left) + 0.75rem);
  }

  body {
    font-size: 0.96rem;
    line-height: 1.7;
    background-attachment: scroll;
  }

  .logo-name {
    font-size: 1.05rem;
  }

  .logo-mark {
    width: 1.6rem;
    height: 1.6rem;
    font-size: 0.62rem;
  }

  .nav {
    gap: 0.55rem;
  }

  .nav a {
    font-size: 0.84rem;
    gap: 0.28rem;
  }

  .nav a i {
    display: none;
  }

  .section {
    padding: 3rem var(--pad-x);
  }

  .about {
    padding-top: 2rem;
    padding-bottom: 2.75rem;
  }

  .about-inner,
  .contact-inner {
    width: min(100%, 23rem);
  }

  .about-hero {
    gap: 1.35rem;
    margin-bottom: 1.75rem;
  }

  .section-head,
  .project-list {
    width: min(100%, 23rem);
  }

  .meta-rule {
    gap: 0.8rem;
    margin-bottom: 1rem;
    font-size: 0.64rem;
    justify-content: center;
  }

  .portrait {
    width: 7.25rem;
  }

  .portrait::before {
    inset: 0.5rem -0.5rem -0.5rem 0.5rem;
  }

  .name {
    font-size: clamp(2.2rem, 11vw, 2.75rem);
    margin-bottom: 0.75rem;
  }

  .role-line {
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
  }

  .lead {
    font-size: 0.96rem;
    line-height: 1.85;
  }

  .lead br {
    display: none;
  }

  .sub {
    font-size: 0.88rem;
    margin-bottom: 1.75rem;
  }

  .highlights p {
    font-size: 0.89rem;
  }

  .hl-num {
    font-size: 0.66rem;
  }

  .cta-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
  }

  .btn {
    width: 100%;
    min-height: 2.7rem;
    padding: 0.6rem 0.5rem;
    font-size: 0.84rem;
    gap: 0.35rem;
  }

  .footnote {
    font-size: 0.78rem;
  }

  .section-head h2,
  .contact-inner h2 {
    font-size: 1.55rem;
  }

  .section-desc {
    font-size: 0.9rem;
  }

  .section-duties {
    margin-top: 1.15rem;
  }

  .section-duties-label {
    font-size: 0.68rem;
  }

  .section-duties ul {
    font-size: 0.88rem;
    line-height: 1.7;
  }

  .project-index {
    font-size: 1.8rem;
  }

  .project-body h3 {
    font-size: 1.22rem;
  }

  .project-tagline,
  .project-desc,
  .compact-list,
  .project-split ul {
    font-size: 0.9rem;
  }

  .project-role {
    font-size: 0.74rem;
    padding: 0.2rem 0.55rem;
  }

  .doc-link {
    font-size: 0.88rem;
  }

  .evidence {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
  }

  .evidence-frame--diagram {
    height: 16rem;
    padding: 0.55rem;
  }

  .evidence-phones {
    gap: 0.85rem;
  }

  .evidence-frame--phone {
    height: 20rem;
    padding: 0.45rem;
  }

  .evidence-frame--wide {
    height: 12rem;
    padding: 0.55rem;
  }

  .evidence-item figcaption {
    font-size: 0.76rem;
  }

  .contact-links a {
    font-size: 1.05rem;
    padding: 0.95rem 0.25rem;
    gap: 0.5rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.35rem;
    text-align: center;
  }

  .site-footer {
    padding-bottom: max(2rem, env(safe-area-inset-bottom));
  }

  .reveal {
    transform: translateY(0.8rem);
  }
}

@media (max-width: 380px) {
  .cta-row {
    grid-template-columns: 1fr;
  }

  .contact-links a {
    font-size: 0.98rem;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .progress {
    transition: none;
  }
}