@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;700&display=swap");

:root {
  --page-top: #f6f1e7;
  --page-bottom: #e8efe9;
  --bg: #efe8da;
  --ink: #16202b;
  --muted: #52606f;
  --panel: rgba(255, 252, 246, 0.84);
  --panel-strong: rgba(255, 252, 246, 0.94);
  --border: rgba(22, 32, 43, 0.1);
  --card-border: rgba(22, 32, 43, 0.09);
  --soft-border: rgba(22, 32, 43, 0.08);
  --accent: #126b63;
  --accent-soft: rgba(18, 107, 99, 0.12);
  --highlight: #c9653f;
  --chip-bg: rgba(255, 255, 255, 0.58);
  --chip-border: rgba(18, 107, 99, 0.14);
  --link-border: rgba(22, 32, 43, 0.12);
  --link-border-hover: rgba(18, 107, 99, 0.38);
  --brand-bg: #16202b;
  --brand-ink: #f9f5ed;
  --surface-glow-warm: rgba(201, 101, 63, 0.18);
  --surface-glow-cool: rgba(18, 107, 99, 0.18);
  --grid-line-overlay: rgba(255, 255, 255, 0.05);
  --shadow: 0 24px 60px rgba(15, 23, 34, 0.12);
  --toggle-shadow: rgba(15, 23, 34, 0.08);
  --chart-start: var(--accent);
  --chart-end: var(--highlight);
  --chart-grid: rgba(22, 32, 43, 0.1);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 12px;
  --content-width: 1120px;
}

:root[data-theme="dark"] {
  --page-top: #0e1621;
  --page-bottom: #0b1119;
  --bg: #101925;
  --ink: #edf1f5;
  --muted: #a7b1be;
  --panel: rgba(16, 25, 37, 0.8);
  --panel-strong: rgba(18, 28, 41, 0.92);
  --border: rgba(237, 241, 245, 0.12);
  --card-border: rgba(167, 177, 190, 0.18);
  --soft-border: rgba(167, 177, 190, 0.16);
  --accent: #6cd9c5;
  --accent-soft: rgba(108, 217, 197, 0.16);
  --highlight: #f1a278;
  --chip-bg: rgba(255, 255, 255, 0.06);
  --chip-border: rgba(108, 217, 197, 0.18);
  --link-border: rgba(167, 177, 190, 0.2);
  --link-border-hover: rgba(108, 217, 197, 0.5);
  --brand-bg: #edf1f5;
  --brand-ink: #101925;
  --surface-glow-warm: rgba(241, 162, 120, 0.08);
  --surface-glow-cool: rgba(108, 217, 197, 0.1);
  --grid-line-overlay: rgba(255, 255, 255, 0.04);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --toggle-shadow: rgba(0, 0, 0, 0.18);
  --chart-start: var(--accent);
  --chart-end: var(--highlight);
  --chart-grid: rgba(167, 177, 190, 0.2);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, var(--surface-glow-warm), transparent 32%),
    radial-gradient(circle at top right, var(--surface-glow-cool), transparent 38%),
    linear-gradient(180deg, var(--page-top) 0%, var(--bg) 46%, var(--page-bottom) 100%);
  transition:
    background 180ms ease,
    color 180ms ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line-overlay) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-overlay) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at center, black 24%, transparent 82%);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 20;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--brand-bg);
  color: var(--brand-ink);
}

.skip-link:focus {
  top: 1rem;
}

.page-shell {
  position: relative;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: clamp(1rem, 2vw, 1.5rem);
}

.hero,
.section,
.site-footer {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.hero {
  padding: clamp(1rem, 2vw, 1.2rem) 0 clamp(1.5rem, 3vw, 2rem);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  background: var(--brand-bg);
  color: var(--brand-ink);
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  font-weight: 700;
  text-decoration: none;
}

.nav-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 0.9rem 1rem;
  min-width: 0;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.9rem;
}

.nav-links a,
.text-link {
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
}

.theme-toggle {
  position: relative;
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 0;
  min-width: 8.2rem;
  min-height: 2.6rem;
  padding: 0.25rem;
  border: 1px solid var(--link-border);
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 12px 30px var(--toggle-shadow);
  overflow: hidden;
}

.theme-toggle-thumb {
  position: absolute;
  top: 0.25rem;
  bottom: 0.25rem;
  left: 0.25rem;
  width: calc(50% - 0.25rem);
  border-radius: 999px;
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14);
  transition: transform 220ms ease;
}

:root[data-theme="dark"] .theme-toggle-thumb {
  transform: translateX(100%);
}

.theme-toggle-option {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.7rem;
  min-height: 2.05rem;
  padding: 0 0.75rem;
  color: var(--muted);
  font-size: 0.92rem;
  transition: color 180ms ease;
}

:root[data-theme="light"] .theme-toggle-option-light,
:root[data-theme="dark"] .theme-toggle-option-dark {
  color: var(--accent);
}

.nav-links a:hover,
.text-link:hover,
.theme-toggle:hover {
  color: var(--accent);
}

.theme-toggle:hover,
.theme-toggle:focus-visible,
.contact-link:hover {
  border-color: var(--link-border-hover);
}

.theme-toggle:focus-visible,
.nav-links a:focus-visible,
.text-link:focus-visible,
.contact-link:focus-visible,
.brand:focus-visible,
.skip-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(min(100%, 19rem), 0.9fr);
  gap: clamp(1rem, 2.5vw, 1.5rem);
  align-items: stretch;
}

.hero-copy,
.panel-card,
.section,
.site-footer {
  border: 1px solid var(--border);
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  transition:
    background-color 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease;
}

.hero-copy {
  padding: clamp(1.8rem, 3vw, 3rem);
  border-radius: var(--radius-lg);
}

.eyebrow,
.section-kicker,
.panel-label,
.status-text,
.chart-caption {
  color: var(--muted);
  font-size: 0.95rem;
}

.eyebrow,
.section-kicker {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
}

.hero-copy h1,
.section-heading h2 {
  margin: 0;
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  line-height: 1;
}

.hero-copy h1 {
  font-size: clamp(3rem, 8vw, 5.75rem);
  margin-top: 0.2rem;
}

.hero-role {
  margin: 0.9rem 0 0;
  font-size: clamp(1.15rem, 2.5vw, 1.6rem);
  font-weight: 600;
  color: var(--accent);
}

.hero-summary,
.about-copy p,
.contact-copy p {
  margin: 1.25rem 0 0;
  max-width: 60ch;
  color: var(--ink);
  font-size: 1.05rem;
  line-height: 1.7;
}

.focus-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.contact-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.focus-chip,
.tag,
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.4rem;
  padding: 0.55rem 0.85rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.94rem;
}

.focus-chip,
.tag {
  background: var(--chip-bg);
  border-color: var(--chip-border);
}

.contact-link {
  display: flex;
  width: 100%;
  min-width: 0;
  justify-content: center;
  text-decoration: none;
  border-color: var(--link-border);
  background: var(--panel-strong);
  color: var(--ink);
}

.chip-icon {
  display: block;
  width: 0.95rem;
  height: 0.95rem;
  flex: 0 0 auto;
}

.contact-link:hover {
  color: var(--accent);
}

.hero-panel {
  display: grid;
  gap: clamp(0.85rem, 2vw, 1rem);
}

.panel-card {
  padding: clamp(1.1rem, 2.5vw, 1.35rem);
  border-radius: var(--radius-md);
}

.metric-stack,
.metric-grid {
  display: grid;
  gap: 0.85rem;
  margin-top: 1rem;
}

.metric-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.metric-item {
  padding-top: 0.8rem;
  border-top: 1px solid var(--soft-border);
}

.metric-item strong,
.metric-stat strong {
  display: block;
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  font-size: 1.25rem;
}

.metric-item span,
.metric-stat span {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.5;
}

.section {
  margin-top: clamp(1.1rem, 2vw, 1.5rem);
  padding: clamp(1.35rem, 3vw, 2rem);
  border-radius: var(--radius-lg);
}

.section-heading {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.section-heading h2 {
  font-size: clamp(1.9rem, 4vw, 3rem);
}

#about .section-heading h2 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

.about-copy {
  display: grid;
  gap: 1rem;
}

.about-copy p {
  margin: 0;
  max-width: none;
}

.card-grid {
  display: grid;
  gap: clamp(0.9rem, 2vw, 1rem);
}

.work-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
}

.work-card,
.contact-panel {
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  background: var(--panel-strong);
  min-width: 0;
}

.work-card {
  padding: 1.2rem;
}

.work-card h3 {
  margin: 0;
  font-size: 1.1rem;
}

.work-card p {
  margin: 0.8rem 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.contact-copy:has(p:empty) {
  display: none;
}

.contact-panel {
  padding: clamp(1rem, 2.5vw, 1.25rem);
  overflow: hidden;
}

.section-compact {
  padding-bottom: 1.35rem;
}

.contact-panel {
  display: grid;
  gap: 1rem;
}

.site-footer {
  margin: 1.5rem 0 2rem;
  padding: 1rem 1.2rem;
  border-radius: var(--radius-md);
}

.site-footer p {
  margin: 0;
  color: var(--muted);
}

.top-pin {
  --top-pin-offset: clamp(1rem, 3vw, 1.5rem);

  position: fixed;
  right: max(var(--top-pin-offset), calc(env(safe-area-inset-right) + var(--top-pin-offset)));
  bottom: max(var(--top-pin-offset), calc(env(safe-area-inset-bottom) + var(--top-pin-offset)));
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border: 1px solid var(--brand-bg);
  border-radius: 999px;
  background: var(--brand-bg);
  color: var(--brand-ink);
  text-decoration: none;
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  will-change: opacity, transform;
  /* Visible by default so the control stays usable if a content blocker
     drops the script. JS adds .is-at-top to hide it on first paint when
     scrollY === 0, then animates with .is-visible / .is-hiding. */
  opacity: 1;
  pointer-events: auto;
  transition:
    border-color 180ms ease,
    color 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

.top-pin.is-at-top {
  opacity: 0;
  pointer-events: none;
}

.top-pin.is-visible {
  animation: top-pin-fade-in 220ms ease forwards;
  pointer-events: auto;
}

.top-pin.is-hiding {
  animation: top-pin-fade-out 180ms ease forwards;
  pointer-events: none;
}

.top-pin:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.top-pin svg {
  display: block;
  width: 1.35rem;
  height: 1.35rem;
  overflow: visible;
}

.top-pin svg path {
  fill: currentColor;
}

@keyframes top-pin-fade-in {
  from {
    opacity: 0;
    transform: translateY(0.5rem);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes top-pin-fade-out {
  from {
    opacity: 1;
    transform: translateY(0);
  }

  to {
    opacity: 0;
    transform: translateY(0.5rem);
  }
}

.status-text {
  margin: 1rem 0 0;
}

[hidden] {
  display: none !important;
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .nav-controls {
    width: 100%;
    justify-content: flex-start;
  }

  .nav-links {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .hero-copy,
  .section,
  .panel-card,
  .chart-card,
  .publication-card,
  .contact-panel {
    border-radius: 22px;
  }

  .contact-links {
    grid-template-columns: repeat(2, 1fr);
  }

  .chart-header {
    flex-direction: column;
  }

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

  .hero-copy h1 {
    font-size: 2.9rem;
  }

  .chart-year-label,
  .chart-value-label,
  .chart-axis-label {
    font-size: 10px;
  }
}

@media (max-width: 480px) {
  .nav-controls {
    gap: 0.75rem;
  }

  .theme-toggle {
    min-width: 7.7rem;
  }
}