/* =========================================================
   Susan Shao — Portfolio
   Design system: editorial minimalism.
   Geometric sans display (Didact Gothic) + sans body (Inter),
   black/white base with a single red accent, generous whitespace.
   ========================================================= */

:root {
  --color-bg: #FFFFFF;
  --color-bg-alt: #F1EFEA;
  --color-ink: #141414;
  --color-ink-soft: #4A4944;
  --color-ink-faint: #8C897F;
  --color-line: #DEDBD2;
  --color-accent: #6155F5;
  --color-accent-soft: #F2E2DC;
  --color-white: #FFFFFF;

  --font-display: 'Didact Gothic', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --measure: 42rem;
  --gutter: clamp(1.5rem, 5vw, 4.5rem);
  --section-space: clamp(4rem, 10vw, 8rem);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a {
  color: inherit;
  text-decoration-color: var(--color-line);
  text-underline-offset: 3px;
}
a:hover { text-decoration-color: currentColor; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1.25em; }
p:last-child { margin-bottom: 0; }

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 0.9em;
  display: block;
}

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

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.wrap--wide {
  max-width: 1584px;
}

.prose {
  max-width: var(--measure);
}

section { padding-top: var(--section-space); }

.hr {
  border: none;
  border-top: 1px solid var(--color-line);
  margin: var(--section-space) 0;
}

/* ---------- site header / nav ---------- */

.site-header {
  padding: 2rem 0 1rem;
}

.site-header .wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.wordmark a { text-decoration: none; }

.site-nav {
  display: flex;
  gap: 1.75rem;
  font-size: 0.92rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--color-ink-soft);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-ink);
  border-bottom-color: var(--color-accent);
}

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

.hero {
  padding-top: clamp(3rem, 8vw, 6rem);
  padding-bottom: clamp(2.5rem, 6vw, 4rem);
}

.hero h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  max-width: 16ch;
}

.hero .lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--color-ink-soft);
  max-width: 38rem;
  margin-top: 1.1em;
}

.hero .contact-line {
  margin-top: 2rem;
  font-size: 0.95rem;
  color: var(--color-ink-faint);
}
.hero .contact-line a { color: var(--color-ink); text-decoration: underline; }

/* ---------- project grid ---------- */

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(2rem, 4vw, 3.5rem) clamp(1.5rem, 3vw, 3rem);
  padding-bottom: var(--section-space);
}

@media (max-width: 720px) {
  .project-grid { grid-template-columns: 1fr; }
}

.project-card {
  display: block;
  text-decoration: none;
  color: inherit;
  group: card;
}

.project-thumb {
  aspect-ratio: 4 / 3;
  border-radius: 4px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-accent-soft) 100%);
  position: relative;
  margin-bottom: 1.1rem;
  border: 1px solid var(--color-line);
}

.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-thumb .thumb-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--color-ink-faint);
  text-align: center;
  padding: 1.5rem;
  letter-spacing: 0.02em;
}

.project-card:hover .project-thumb {
  border-color: var(--color-accent);
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.project-card h3 {
  font-size: 1.25rem;
  font-weight: 400;
  margin-bottom: 0.3em;
}

.project-tag {
  font-size: 0.78rem;
  color: var(--color-ink-faint);
  white-space: nowrap;
}

.project-card p {
  color: var(--color-ink-soft);
  font-size: 0.96rem;
}

/* ---------- case study template ---------- */

.cs-hero {
  padding-top: clamp(2.5rem, 6vw, 4rem);
  padding-bottom: clamp(2rem, 5vw, 3rem);
  border-bottom: 1px solid var(--color-line);
}

.cs-hero h1 {
  font-size: clamp(2rem, 4.2vw, 3.1rem);
  max-width: 20ch;
}

.cs-hero .lede {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  color: var(--color-ink-soft);
  max-width: 40rem;
  margin-top: 0.9em;
}

.cs-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
  margin-top: 2.25rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--color-line);
  max-width: 44rem;
}

.cs-meta dt {
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin-bottom: 0.35em;
}

.cs-meta dd {
  margin: 0;
  font-size: 0.95rem;
}

.cs-section {
  padding-top: var(--section-space);
}

.cs-section h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.85rem);
  margin-bottom: 0.7em;
}

.cs-section h3 {
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  margin-top: 2em;
  margin-bottom: 0.6em;
}

.cs-section .prose p,
.cs-section .prose li {
  color: var(--color-ink-soft);
}

.cs-section blockquote {
  margin: 1.75em 0;
  padding-left: 1.25rem;
  border-left: 2px solid var(--color-accent);
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--color-ink);
  font-style: italic;
}

.figure {
  margin: 2.5rem 0;
}

.figure-frame {
  aspect-ratio: 16 / 10;
  border-radius: 4px;
  border: 1px solid var(--color-line);
  background: repeating-linear-gradient(
    135deg,
    var(--color-bg-alt),
    var(--color-bg-alt) 10px,
    #EAE7DF 10px,
    #EAE7DF 20px
  );
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.figure-frame img { width: 100%; height: 100%; object-fit: cover; }

.figure-frame video { width: 100%; height: 100%; object-fit: cover; display: block; }

.figure-frame.is-media {
  background: var(--color-ink);
}

.figure-frame--tall {
  aspect-ratio: 1519 / 1748;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame.is-doc {
  background: var(--color-white);
  display: block;
}

.figure-frame.is-doc img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.figure-frame--doc {
  aspect-ratio: 734 / 1001;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--wide-media {
  aspect-ratio: 1353 / 1087;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--status {
  aspect-ratio: 1976 / 1310;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--data {
  aspect-ratio: 2350 / 1614;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--orders {
  aspect-ratio: 2880 / 1900;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--patient-info {
  aspect-ratio: 1329 / 961;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--dashboard {
  aspect-ratio: 1440 / 1461;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--processing {
  aspect-ratio: 1440 / 1328;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--order-detail {
  aspect-ratio: 2880 / 1920;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--journey {
  aspect-ratio: 7549 / 5272;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--gia-release {
  aspect-ratio: 840 / 640;
}

.figure-frame--portal-settings {
  aspect-ratio: 1200 / 740;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--edit-result-types {
  aspect-ratio: 1200 / 739;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--gia-guidelines {
  aspect-ratio: 480 / 974;
  max-width: 380px;
  margin: 0 auto;
}

.figure-frame--edit-chips {
  aspect-ratio: 480 / 974;
  max-width: 380px;
  margin: 0 auto;
}

.figure-frame--separate-pages {
  aspect-ratio: 480 / 974;
  max-width: 380px;
  margin: 0 auto;
}

.figure-frame--onboarding {
  aspect-ratio: 800 / 600;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--pgui-competitive {
  aspect-ratio: 1400 / 1144;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--pgui-files {
  aspect-ratio: 1600 / 946;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--pgui-workflow-preset {
  aspect-ratio: 1600 / 639;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--pgui-workflow-treatment {
  aspect-ratio: 1600 / 651;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--pgui-flowchart {
  aspect-ratio: 1400 / 1311;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--pgui-wireframes {
  aspect-ratio: 1400 / 902;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--pgui-iteration {
  aspect-ratio: 1600 / 702;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--pgui-demo {
  aspect-ratio: 800 / 600;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--persona-map {
  aspect-ratio: 1440 / 1341;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--persona-insights {
  aspect-ratio: 1200 / 1156;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame--persona-journey {
  aspect-ratio: 1200 / 944;
  max-width: 960px;
  margin: 0 auto;
}

.figure-frame.is-zoomable {
  cursor: zoom-in;
  position: relative;
}

.figure-frame.is-zoomable::after {
  content: "Click to expand";
  position: absolute;
  right: 0.75rem;
  bottom: 0.75rem;
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--color-ink-soft);
  background: var(--color-white);
  border: 1px solid var(--color-line);
  padding: 0.3rem 0.6rem;
  border-radius: 3px;
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.figure-frame.is-zoomable:hover::after {
  opacity: 1;
  transform: translateY(0);
}

.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 20, 20, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1.5rem, 5vw, 4rem);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease;
  cursor: zoom-out;
}

.lightbox-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox-overlay img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  border-radius: 4px;
  cursor: default;
}

.lightbox-close {
  position: absolute;
  top: clamp(1rem, 3vw, 2rem);
  right: clamp(1rem, 3vw, 2rem);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: none;
  background: var(--color-white);
  color: var(--color-ink);
  font-size: 1.4rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.figure-stack {
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 5vw, 3.5rem);
}

.figure-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}
.figure-split .figure {
  margin: 0 auto;
}
@media (max-width: 780px) {
  .figure-split { grid-template-columns: 1fr; }
}

.figure-frame .placeholder-label {
  font-size: 0.82rem;
  color: var(--color-ink-faint);
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  padding: 0.5rem 0.9rem;
  border-radius: 3px;
  max-width: 80%;
  text-align: center;
}

.figure figcaption {
  font-size: 0.85rem;
  color: var(--color-ink-faint);
  margin-top: 0.75rem;
  max-width: var(--measure);
}

.figure-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 640px) {
  .figure-pair { grid-template-columns: 1fr; }
}

.figure-trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  max-width: 960px;
  margin: 0 auto;
}
.figure-trio .figure-frame {
  max-width: none;
  margin: 0;
}
@media (max-width: 800px) {
  .figure-trio { grid-template-columns: 1fr; }
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.75rem;
  margin: 2rem 0;
}

.stat {
  border-top: 2px solid var(--color-accent);
  padding-top: 0.9rem;
}

.stat .stat-number {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  display: block;
  line-height: 1;
  margin-bottom: 0.35em;
}

.stat .stat-label {
  font-size: 0.88rem;
  color: var(--color-ink-soft);
}

.cs-nav-next {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--section-space) 0 clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--color-line);
  margin-top: var(--section-space);
  gap: 1rem;
  flex-wrap: wrap;
}

.cs-nav-next a {
  text-decoration: none;
}

.cs-nav-next .label {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  display: block;
  margin-bottom: 0.4em;
}

.cs-nav-next .title {
  font-family: var(--font-display);
  font-size: 1.4rem;
}

.back-link {
  display: inline-block;
  font-size: 0.9rem;
  color: var(--color-ink-faint);
  text-decoration: none;
  margin-bottom: 1.5rem;
}
.back-link:hover { color: var(--color-ink); }

/* ---------- about page ---------- */

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 5rem);
  padding-bottom: var(--section-space);
  align-items: start;
}
@media (max-width: 780px) {
  .about-layout { grid-template-columns: 1fr; }
}

.about-photo {
  aspect-ratio: 3 / 4;
  border-radius: 4px;
  border: 1px solid var(--color-line);
  background: linear-gradient(160deg, var(--color-bg-alt), var(--color-accent-soft));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-faint);
  font-size: 0.85rem;
  text-align: center;
  overflow: hidden;
}

.about-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-text h2 {
  font-size: 1.6rem;
}

.about-text .role {
  color: var(--color-ink-faint);
  font-size: 0.95rem;
  margin-bottom: 1.75rem;
}

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

.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 2.5rem 0;
  margin-top: var(--section-space);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.88rem;
  color: var(--color-ink-faint);
}

.site-footer a {
  color: var(--color-ink-faint);
  text-decoration: none;
}
.site-footer a:hover { color: var(--color-ink); }

.footer-links {
  display: flex;
  gap: 1.5rem;
}