/* ============================================
   Self-hosted fonts — for China accessibility
   (Google Fonts CDN is blocked in mainland China)
   ============================================ */

/* Afronaut — logo */
@font-face {
  font-family: 'Afronaut';
  src: url('fonts/AfronautTest-Regular.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* Inter Variable — body */
@font-face {
  font-family: 'Inter';
  src: url('fonts/inter-latin.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  src: url('fonts/inter-latin-ext.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* Space Grotesk — display */
@font-face {
  font-family: 'Space Grotesk';
  src: url('fonts/spacegrotesk-latin.woff2') format('woff2');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Space Grotesk';
  src: url('fonts/spacegrotesk-latin-ext.woff2') format('woff2');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* JetBrains Mono — mono */
@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/jetbrainsmono-latin.woff2') format('woff2');
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/jetbrainsmono-latin-ext.woff2') format('woff2');
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* ============================================
   FRAMER: css-variables
   Dark theme (default) — all custom properties
   ============================================ */
:root {
  /* Dark palette — luminance-based depth */
  --bg-primary: #08080a;
  --bg-secondary: #0f0f12;
  --bg-card: #141418;
  --bg-elevated: #1a1a1f;
  --bg-nav: rgba(8, 8, 10, 0.82);
  --text-primary: #ececf0;
  --text-secondary: #8b8b96;
  --text-muted: #56565e;
  --accent-green: #a8d5a2;
  --accent-green-dim: rgba(168, 213, 162, 0.06);
  --accent-green-hover: rgba(168, 213, 162, 0.10);
  --accent-green-glow: rgba(168, 213, 162, 0.04);
  --accent-warm: #d4a574;
  --border: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(255, 255, 255, 0.12);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255,255,255,0.04);
  --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255,255,255,0.06);
  --placeholder-gradient: linear-gradient(135deg, #101014 0%, #18181e 100%);

  /* Fonts — Inter Variable with OpenType features */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-logo: 'Afronaut', 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --radius: 12px;
  --radius-sm: 8px;

  --transition: 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  color-scheme: dark light;
}

/* ============================================
   FRAMER: light-theme
   ============================================ */
@media (prefers-color-scheme: light) {
  html[data-theme="auto"] {
    --bg-primary: #fafafa;
    --bg-secondary: #f2f2f4;
    --bg-card: #ffffff;
    --bg-elevated: #ffffff;
    --bg-nav: rgba(250, 250, 250, 0.82);
    --text-primary: #1a1a1e;
    --text-secondary: #5a5a64;
    --text-muted: #9a9aa4;
    --accent-green: #3d8436;
    --accent-green-dim: rgba(61, 132, 54, 0.06);
    --accent-green-hover: rgba(61, 132, 54, 0.10);
    --accent-green-glow: rgba(61, 132, 54, 0.04);
    --accent-warm: #b8804a;
    --border: rgba(0, 0, 0, 0.06);
    --border-light: rgba(0, 0, 0, 0.08);
    --border-focus: rgba(0, 0, 0, 0.12);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.04), 0 0 0 1px rgba(0,0,0,0.04);
    --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0,0,0,0.06);
    --placeholder-gradient: linear-gradient(135deg, #f2f2f4 0%, #eaeaee 100%);
  }
}

html[data-theme="light"] {
  --bg-primary: #fafafa;
  --bg-secondary: #f2f2f4;
  --bg-card: #ffffff;
  --bg-elevated: #ffffff;
  --bg-nav: rgba(250, 250, 250, 0.82);
  --text-primary: #1a1a1e;
  --text-secondary: #5a5a64;
  --text-muted: #9a9aa4;
  --accent-green: #3d8436;
  --accent-green-dim: rgba(61, 132, 54, 0.06);
  --accent-green-hover: rgba(61, 132, 54, 0.10);
  --accent-green-glow: rgba(61, 132, 54, 0.04);
  --accent-warm: #b8804a;
  --border: rgba(0, 0, 0, 0.06);
  --border-light: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(0, 0, 0, 0.12);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.04), 0 0 0 1px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0,0,0,0.06);
  --placeholder-gradient: linear-gradient(135deg, #f2f2f4 0%, #eaeaee 100%);
}

html[data-theme="dark"] {
  --bg-primary: #08080a;
  --bg-secondary: #0f0f12;
  --bg-card: #141418;
  --bg-elevated: #1a1a1f;
  --bg-nav: rgba(8, 8, 10, 0.82);
  --text-primary: #ececf0;
  --text-secondary: #8b8b96;
  --text-muted: #56565e;
  --accent-green: #a8d5a2;
  --accent-green-dim: rgba(168, 213, 162, 0.06);
  --accent-green-hover: rgba(168, 213, 162, 0.10);
  --accent-green-glow: rgba(168, 213, 162, 0.04);
  --accent-warm: #d4a574;
  --border: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(255, 255, 255, 0.12);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255,255,255,0.04);
  --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255,255,255,0.06);
  --placeholder-gradient: linear-gradient(135deg, #101014 0%, #18181e 100%);
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  font-feature-settings: 'cv01' 1, 'ss03' 1;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 350;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ============================================
   FRAMER: navigation
   3-column: logo left | tabs center | controls right
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-nav);
  backdrop-filter: blur(32px) saturate(1.4);
  -webkit-backdrop-filter: blur(32px) saturate(1.4);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.nav--scrolled {
  border-bottom-color: var(--border);
}

.nav__logo {
  font-family: var(--font-logo);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  justify-self: start;
}

.logo-x {
  font-family: var(--font-logo);
}

.nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  justify-self: end;
}

.nav__links {
  display: flex;
  list-style: none;
  gap: var(--space-md);
  justify-self: center;
}

.nav__links a {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  transition: color var(--transition);
  text-transform: uppercase;
}

.nav__links a:hover {
  color: var(--text-primary);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* ============================================
   Theme Toggle
   ============================================ */
.theme-toggle {
  background: var(--accent-green-glow);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
}

.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
  background: var(--accent-green-dim);
}

.theme-toggle__moon {
  display: none;
}

html[data-theme="dark"] .theme-toggle__sun { display: none; }
html[data-theme="dark"] .theme-toggle__moon { display: block; }

html[data-theme="auto"] .theme-toggle__sun { display: block; }
html[data-theme="auto"] .theme-toggle__moon { display: none; }

@media (prefers-color-scheme: dark) {
  html[data-theme="auto"] .theme-toggle__sun { display: none; }
  html[data-theme="auto"] .theme-toggle__moon { display: block; }
}

html[data-theme="light"] .theme-toggle__sun { display: none; }
html[data-theme="light"] .theme-toggle__moon { display: block; }

/* ============================================
   Language Switcher
   ============================================ */
.lang-switcher {
  position: relative;
}

.lang-switcher__btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--accent-green-glow);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  height: 34px;
  box-sizing: border-box;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 510;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.lang-switcher__btn:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.lang-switcher__menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: var(--transition);
  z-index: 110;
  min-width: 60px;
  overflow: hidden;
}

.lang-switcher__menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switcher__menu button {
  display: block;
  width: 100%;
  background: none;
  border: none;
  padding: 8px 14px;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  cursor: pointer;
  text-align: left;
  transition: var(--transition);
}

.lang-switcher__menu button:hover,
.lang-switcher__menu button.active {
  color: var(--accent-green);
  background: var(--accent-green-dim);
}

/* ============================================
   FRAMER: hero
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-xl) var(--space-md);
  overflow: hidden;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero__content {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  z-index: 2;
}

.hero__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-green);
  margin-bottom: var(--space-md);
  opacity: 0.8;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.045em;
  margin-bottom: var(--space-md);
}

.hero__accent {
  color: var(--accent-green);
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: var(--space-lg);
  line-height: 1.7;
  font-weight: 350;
  letter-spacing: -0.01em;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 510;
  letter-spacing: -0.005em;
  color: var(--accent-green);
  border: 1px solid rgba(168, 213, 162, 0.25);
  background: var(--accent-green-dim);
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.hero__cta:hover {
  background: var(--accent-green-hover);
  border-color: rgba(168, 213, 162, 0.35);
  box-shadow: 0 0 20px var(--accent-green-glow);
}

/* ============================================
   Sections (shared)
   ============================================ */
.section {
  padding: var(--space-xl) var(--space-md);
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__header {
  margin-bottom: var(--space-lg);
}

.section__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--accent-green);
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: var(--space-xs);
  opacity: 0.7;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.04em;
}

/* ============================================
   FRAMER: projects
   ============================================ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-md);
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
  box-shadow: var(--shadow-card);
}

.project-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.project-card__image {
  aspect-ratio: 16 / 10;
  background: var(--bg-secondary);
  overflow: hidden;
}

.project-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  background: var(--placeholder-gradient);
}

.project-card__placeholder--confidential {
  background: repeating-linear-gradient(
    135deg,
    var(--bg-secondary) 0px,
    var(--bg-secondary) 12px,
    var(--bg-tertiary, var(--bg-primary)) 12px,
    var(--bg-tertiary, var(--bg-primary)) 24px
  );
  color: var(--text-muted);
  opacity: 0.6;
}

.project-card__info {
  padding: var(--space-sm) var(--space-md) var(--space-md);
}

.project-card__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 510;
  letter-spacing: -0.015em;
  margin-bottom: var(--space-xs);
}

.project-card__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
  letter-spacing: -0.006em;
  margin-bottom: var(--space-sm);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* Tags (shared) */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.02em;
  padding: 4px 10px;
  border: 1px solid var(--border-light);
  border-radius: 100px;
  color: var(--text-muted);
  white-space: nowrap;
  transition: var(--transition);
  background: var(--accent-green-glow);
}

/* ============================================
   FRAMER: experience-timeline
   ============================================ */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--border-light);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-lg);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__marker {
  position: absolute;
  left: -40px;
  top: 8px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid var(--accent-green);
  background: var(--bg-primary);
  transition: background var(--transition);
}

.timeline__date {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-green);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: var(--space-xs);
}

.timeline__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 510;
  letter-spacing: -0.015em;
  margin-bottom: 4px;
}

.timeline__place {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.timeline__desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 600px;
}

/* ============================================
   Experience highlights
   ============================================ */
.experience__highlights {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  max-width: 640px;
}

.experience__highlights-title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.experience__highlights-list {
  list-style: none;
  display: grid;
  grid-template-columns: max-content 1fr;
  user-select: none;
}

/* display:contents makes <li> transparent to layout —
   children become direct grid cells, giving a true shared second column */
.hl-row {
  display: contents;
  cursor: pointer;
}

.hl-head {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  white-space: nowrap;
  color: var(--text-muted);
  padding: 10px 36px 10px 0;
  cursor: pointer;
  transition: color 0.22s ease;
}

.hl-body {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.65;
  text-align: left;
  padding: 10px 0;
  cursor: pointer;
  transition: color 0.22s ease;
}

/* Active row: green gradient headline + high-contrast body */
.hl-row.active .hl-head {
  background: linear-gradient(90deg, #2F6B4A 0%, #5C8F63 50%, #A7DCC3 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hl-row.active .hl-body {
  color: var(--text-primary);
}

@media (prefers-reduced-motion: reduce) {
  .hl-head,
  .hl-body {
    transition: none;
  }
}

/* ============================================
   FRAMER: publications
   ============================================ */
.publications__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.pub-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-md);
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}

.pub-card:hover {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-card-hover);
}

.pub-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.pub-card__year {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-green);
}

.pub-card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 510;
  margin-bottom: var(--space-xs);
  line-height: 1.35;
  letter-spacing: -0.015em;
}

.pub-card__authors {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.pub-card__venue {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: var(--space-sm);
}

.pub-card__abstract {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.pub-card__link {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-green);
  letter-spacing: 0.03em;
  transition: var(--transition);
}

.pub-card__link:hover {
  opacity: 0.7;
}

/* ============================================
   FRAMER: about
   ============================================ */
.about__content {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.about__photo {
  aspect-ratio: 3 / 4;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}

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

.about__photo-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--placeholder-gradient);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
}

.about__text p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.about__skills {
  margin-top: var(--space-md);
}

.about__skills-title {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  font-weight: 500;
}

.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ============================================
   Skills grouped layout
   ============================================ */
.skills__groups {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.skills__group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.skills__group-label {
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

/* Expanded section */
.skills__expanded {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.45s ease, opacity 0.3s ease;
}

.skills__expanded.open {
  max-height: 800px;
  opacity: 1;
}

.skills__expanded-inner {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
  margin-top: var(--space-md);
}

.skills__category {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.skills__category-label {
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.skills__category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* Toggle button */
.skills__toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: var(--space-sm);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  transition: color var(--transition);
}

.skills__toggle:hover {
  color: var(--text-secondary);
}

.skills__toggle-less {
  display: none;
}

.skills__toggle-icon {
  transition: transform 0.3s ease;
}

.skills__toggle[aria-expanded="true"] .skills__toggle-more {
  display: none;
}

.skills__toggle[aria-expanded="true"] .skills__toggle-less {
  display: inline;
}

.skills__toggle[aria-expanded="true"] .skills__toggle-icon {
  transform: rotate(180deg);
}

@media (max-width: 640px) {
  .skills__groups {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .skills__expanded-inner {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
}

/* ============================================
   FRAMER: contact
   ============================================ */
.contact {
  padding-bottom: var(--space-lg);
}

.contact__text {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.75;
  margin-bottom: var(--space-lg);
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.contact__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  max-width: 400px;
  background: var(--bg-card);
}

.contact__link:hover {
  border-color: rgba(168, 213, 162, 0.2);
  background: var(--accent-green-dim);
  box-shadow: 0 0 20px var(--accent-green-glow);
}

.contact__link-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-green);
  min-width: 60px;
}

.contact__link-value {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  text-align: center;
  padding: var(--space-lg) var(--space-md) var(--space-md);
  border-top: 1px solid var(--border);
  font-family: var(--font-logo);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  transition: border-color var(--transition);
}

/* ============================================
   Scroll Animations
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
  .about__content {
    grid-template-columns: 1fr;
  }

  .about__photo {
    max-width: 280px;
  }
}

@media (max-width: 768px) {
  .nav {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm);
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 5rem var(--space-md) var(--space-md);
    transform: translateX(100%);
    transition: transform var(--transition), background var(--transition);
    border-left: 1px solid var(--border);
    z-index: 99;
  }

  .nav__links.open {
    transform: translateX(0);
  }

  .nav__links a {
    font-size: 0.9rem;
    padding: var(--space-xs) 0;
  }

  .nav__toggle {
    display: flex;
    z-index: 101;
  }

  .nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
  }

  .nav__toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
}

@media (max-width: 640px) {
  :root {
    --space-xl: 5rem;
    --space-lg: 3rem;
  }

  .hero__title {
    font-size: 2.2rem;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline__marker {
    left: -30px;
    width: 12px;
    height: 12px;
  }

  .contact__link {
    max-width: 100%;
  }

  .pub-card {
    padding: var(--space-sm);
  }
}

/* ============================================
   Project card CTA button
   ============================================ */
.project-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--space-sm);
  background: var(--accent-green-dim);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 510;
  letter-spacing: -0.005em;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.project-card__cta:hover {
  border-color: rgba(168, 213, 162, 0.25);
  color: var(--accent-green);
  background: var(--accent-green-hover);
}

/* ============================================
   Other Work subsection
   ============================================ */
.other-work {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-light);
}

.other-work__header {
  margin-bottom: var(--space-md);
}

.other-work__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  margin-bottom: 4px;
}

.other-work__caption {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.other-work__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-sm);
}

.other-card {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
  background: var(--bg-card);
}

.other-card:hover {
  border-color: var(--border-focus);
}

.other-card__title {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 510;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.other-card__desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-xs);
}

.other-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.other-card__tags .tag {
  font-size: 0.6rem;
  padding: 3px 9px;
}

.other-card--expandable {
  cursor: pointer;
}

.other-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.other-card__header .other-card__title {
  margin-bottom: 0;
}

.other-card__chevron {
  flex-shrink: 0;
  transition: transform 0.3s ease;
  opacity: 0.4;
}

.other-card--expanded .other-card__chevron {
  transform: rotate(180deg);
}

.other-card__detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
  opacity: 0;
}

.other-card--expanded .other-card__detail {
  max-height: 300px;
  opacity: 1;
}

.other-card__detail p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-top: var(--space-xs);
  padding-top: var(--space-xs);
  border-top: 1px solid var(--border-light);
}

/* ============================================
   Project detail panel
   ============================================ */
.project-panel {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 300;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  overflow: hidden;
}

.project-panel.open {
  transform: translateX(0);
}

/* Top bar */
.project-panel__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  height: 64px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.project-panel__back {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  transition: color var(--transition);
  padding: 0;
}

.project-panel__back:hover {
  color: var(--text-primary);
}

.project-panel__index {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* Scrollable body */
.project-panel__body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

/* Hero image */
.proj-detail__image {
  width: 100%;
  aspect-ratio: 21 / 9;
  background: var(--bg-secondary);
  overflow: hidden;
}

.proj-detail__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: var(--placeholder-gradient);
}

/* Content column */
.proj-detail__content {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

.proj-detail__header {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
}

.proj-detail__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  margin-bottom: var(--space-sm);
  line-height: 1.05;
}

.proj-detail__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-md);
}

.proj-detail__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.proj-detail__meta-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.proj-detail__meta-label {
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.proj-detail__meta-value {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Sections */
.proj-detail__sections {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.proj-detail__section-heading {
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.proj-detail__section-body {
  font-size: 0.975rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-top: var(--space-sm);
}

/* Prev / Next nav */
.proj-detail__nav {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

.proj-detail__nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.proj-detail__nav-btn:hover {
  border-color: var(--border-light);
  color: var(--text-primary);
}

.proj-detail__nav-btn:disabled {
  opacity: 0.25;
  cursor: default;
  pointer-events: none;
}

/* Prevent main scroll when panel is open */
body.panel-open {
  overflow: hidden;
}

/* Mobile adjustments */
@media (max-width: 640px) {
  .project-panel__bar {
    padding: 0 var(--space-sm);
  }

  .proj-detail__content {
    padding: var(--space-md) var(--space-sm);
  }

  .proj-detail__image {
    aspect-ratio: 4 / 3;
  }

  .proj-detail__meta {
    gap: var(--space-sm);
  }

  .proj-detail__nav {
    gap: var(--space-sm);
  }

  .proj-detail__nav-btn {
    flex: 1;
    justify-content: center;
  }
}


/* ============================================
   CASE STUDY PAGE
   ============================================ */

/* Nav variant */
.nav--case-study {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav--case-study .nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.cs-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color var(--transition);
}

.cs-back-link:hover {
  color: var(--accent-green);
}

/* Hero */
.cs-hero {
  position: relative;
  width: 100%;
  min-height: 60vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  margin-top: 60px;
}

.cs-hero__image {
  position: absolute;
  inset: 0;
}

.cs-hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cs-hero__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--placeholder-gradient);
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.cs-hero__overlay {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: var(--space-xl) var(--space-lg) var(--space-lg);
  background: linear-gradient(to top, var(--bg-primary) 0%, rgba(10,10,10,0.6) 60%, transparent 100%);
}

html[data-theme="light"] .cs-hero__overlay,
html[data-theme="auto"] .cs-hero__overlay {
  background: linear-gradient(to top, var(--bg-primary) 0%, rgba(250,249,247,0.6) 60%, transparent 100%);
}

@media (prefers-color-scheme: light) {
  html[data-theme="auto"] .cs-hero__overlay {
    background: linear-gradient(to top, var(--bg-primary) 0%, rgba(250,249,247,0.6) 60%, transparent 100%);
  }
}

.cs-hero__content {
  max-width: var(--max-width);
  margin: 0 auto;
}

.cs-hero__label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-green);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.cs-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-xs);
}

.cs-hero__subtitle {
  font-family: var(--font-body);
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.6;
}

/* Main content */
.cs-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Sections */
.cs-section {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--border);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.cs-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.cs-section--final {
  border-bottom: none;
}

.cs-section--highlight {
  position: relative;
}

.cs-section--highlight::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-md));
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent-green);
  opacity: 0.4;
  border-radius: 1px;
}

.cs-section__heading {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  letter-spacing: -0.025em;
}

.cs-contribution-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent-green);
  background: var(--accent-green-dim);
  border: 1px solid var(--accent-green);
  border-radius: 100px;
  padding: 0.2em 0.8em;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  opacity: 0.85;
}

/* Text blocks */
.cs-text-block p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  max-width: 720px;
}

.cs-text-block p:last-child {
  margin-bottom: 0;
}

/* Overview grid */
.cs-overview__grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-lg);
  align-items: start;
}

.cs-overview__text p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: -0.006em;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  max-width: 720px;
}

/* Meta sidebar */
.cs-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.cs-meta__item {
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--space-sm);
}

.cs-meta__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.cs-meta__item dt {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.25rem;
}

.cs-meta__item dd {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.5;
}

/* Image placeholders */
.cs-image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--placeholder-gradient);
  border: 1px dashed var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  text-align: center;
  padding: var(--space-md);
  min-height: 220px;
}

.cs-image-placeholder--tall {
  min-height: 360px;
}

.cs-image-full-img {
  width: 100%;
  border-radius: var(--radius);
  margin-top: var(--space-md);
  margin-bottom: var(--space-sm);
  border: 1px solid var(--border);
}

.cs-image-slot img {
  width: 100%;
  border-radius: var(--radius);
  display: block;
}

.cs-image-full {
  margin-top: var(--space-md);
}

.cs-image-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.cs-image-trio {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.cs-image-slot {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease 0.1s, transform 0.5s ease 0.1s;
}

.cs-image-slot.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stats row */
.cs-stats {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
}

.cs-stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.cs-stat.visible {
  opacity: 1;
  transform: translateY(0);
}

.cs-stat__value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-green);
  line-height: 1;
  letter-spacing: -0.03em;
}

.cs-stat__label {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Back button */
.cs-back {
  padding: var(--space-lg) 0;
  text-align: center;
}

.cs-back__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.75em 1.5em;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.cs-back__btn:hover {
  color: var(--accent-green);
  border-color: rgba(168, 213, 162, 0.25);
  background: var(--accent-green-dim);
  box-shadow: 0 0 20px var(--accent-green-glow);
}

/* ============================================
   Case study list items
   ============================================ */
.cs-list {
  list-style: none;
  padding: 0;
}

.cs-list li {
  position: relative;
  padding-left: 1.25em;
  margin-bottom: var(--space-sm);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.cs-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-green);
  opacity: 0.5;
}

/* ============================================
   Subtle gradient section divider for visual interest
   ============================================ */
.section + .section {
  border-top: 1px solid var(--border);
}

/* Elevated nav buttons */
.proj-detail__nav-btn {
  background: var(--bg-card);
}

.proj-detail__nav-btn:hover {
  border-color: var(--border-focus);
  color: var(--text-primary);
  background: var(--bg-elevated);
}

/* Case study responsive */
@media (max-width: 768px) {
  .cs-hero {
    min-height: 45vh;
  }

  .cs-hero__title {
    font-size: 2rem;
  }

  .cs-hero__overlay {
    padding: var(--space-lg) var(--space-md) var(--space-md);
  }

  .cs-overview__grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .cs-image-pair {
    grid-template-columns: 1fr;
  }

  .cs-image-trio {
    grid-template-columns: 1fr;
  }

  .cs-stats {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .cs-section--highlight::before {
    left: calc(-1 * var(--space-sm));
  }
}

/* Confidential hero placeholder */
.cs-hero__placeholder--confidential {
  background: repeating-linear-gradient(
    45deg,
    var(--bg-secondary),
    var(--bg-secondary) 10px,
    var(--bg-card) 10px,
    var(--bg-card) 20px
  );
  color: var(--text-muted);
  font-style: italic;
}

/* Confidentiality notice */
.cs-notice__box {
  padding: var(--space-md);
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--accent-warm);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
}

.cs-notice__box p {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* Project divider (Final Year Projects A/B) */
.cs-project-divider {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0 0;
}

.cs-project-divider__label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-green);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.cs-project-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* Publication cards (Trace Terra) */
.cs-publications {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.cs-pub {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
}

.cs-pub__type {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--accent-green);
  background: var(--accent-green-dim);
  border-radius: 100px;
  padding: 0.15em 0.6em;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.cs-pub__title {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 0.25rem;
}

.cs-pub__venue {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Bulleted list (Water Purifier deliverables) */
.cs-list {
  list-style: none;
  padding: 0;
  margin: var(--space-sm) 0 0;
}

.cs-list li {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
  padding-left: 1.2em;
  position: relative;
  margin-bottom: 0.4em;
}

.cs-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-green);
  opacity: 0.6;
}