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

:root {
  color-scheme: dark;
  --font-sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Consolas", monospace;
  --container-width: min(1120px, calc(100vw - 2rem));
  --radius-sm: 0.9rem;
  --radius-md: 1.4rem;
  --radius-lg: 2rem;
  --shadow-lg: 0 32px 80px rgba(4, 8, 12, 0.28);
  --shadow-md: 0 18px 40px rgba(4, 8, 12, 0.18);
  --transition: 220ms ease;
}

html[data-theme="dark"] {
  --bg: #14181d;
  --bg-alt: #0f1317;
  --surface: rgba(27, 33, 40, 0.88);
  --surface-strong: #202730;
  --surface-soft: rgba(38, 47, 57, 0.64);
  --text: #edf2f6;
  --muted: #a8b5bf;
  --line: rgba(255, 255, 255, 0.08);
  --accent: #6fd4c0;
  --accent-strong: #a0ede0;
  --accent-soft: rgba(111, 212, 192, 0.16);
  --accent-alt: #f2b46d;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #eef2f4;
  --bg-alt: #e2e8eb;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --surface-soft: rgba(230, 237, 241, 0.9);
  --text: #172028;
  --muted: #5f6c77;
  --line: rgba(12, 21, 32, 0.08);
  --accent: #0f7a67;
  --accent-strong: #0a594b;
  --accent-soft: rgba(15, 122, 103, 0.1);
  --accent-alt: #b96f1e;
  --shadow-lg: 0 30px 70px rgba(15, 23, 32, 0.12);
  --shadow-md: 0 16px 36px rgba(15, 23, 32, 0.08);
}

html[data-page="projects"] {
  --accent: #60c2e1;
  --accent-strong: #9adff1;
  --accent-soft: rgba(96, 194, 225, 0.15);
}

html[data-page="quant"] {
  --accent: #91d8aa;
  --accent-strong: #b8ebc9;
  --accent-soft: rgba(145, 216, 170, 0.14);
  --accent-alt: #d7b16b;
}

html[data-page="quant"][data-theme="dark"] {
  --bg: #101417;
  --bg-alt: #0c1013;
  --surface: rgba(22, 28, 32, 0.9);
  --surface-strong: #1a2126;
  --surface-soft: rgba(31, 39, 45, 0.7);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background:
    radial-gradient(circle at top left, var(--accent-soft), transparent 28%),
    radial-gradient(circle at 80% 10%, rgba(242, 180, 109, 0.08), transparent 26%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, transparent 0%, black 15%, black 85%, transparent 100%);
  opacity: 0.2;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

.page-shell {
  position: relative;
  overflow-x: hidden;
}

.container {
  width: var(--container-width);
  margin: 0 auto;
}

.section {
  padding: 5.5rem 0;
  scroll-margin-top: 6rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
}

.nav-shell {
  min-height: 5.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  min-width: 0;
}

.brand-mark {
  width: 2.6rem;
  height: 2.6rem;
  display: inline-grid;
  place-items: center;
  border-radius: 0.8rem;
  background: linear-gradient(135deg, var(--accent-soft), color-mix(in srgb, var(--accent) 36%, transparent));
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--accent-strong);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
}

.brand-text strong {
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.brand-text span {
  font-size: 0.8rem;
  color: var(--muted);
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 76%, transparent);
}

.site-nav a,
.theme-toggle {
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

.site-nav a {
  padding: 0.68rem 1rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.96rem;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
  color: var(--text);
  background: color-mix(in srgb, var(--accent-soft) 88%, transparent);
}

.theme-toggle {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 72%, transparent);
  color: var(--text);
  padding: 0.78rem 1rem;
  border-radius: 999px;
  cursor: pointer;
}

.theme-toggle:hover,
.theme-toggle:focus-visible,
.button:hover,
.button:focus-visible,
.contact-card:hover,
.contact-card:focus-visible {
  transform: translateY(-1px);
}

.theme-toggle-label {
  font-size: 0.9rem;
}

.hero {
  padding-top: 7rem;
}

.hero-grid,
.two-column,
.footer-grid,
.callout-panel,
.project-detail-grid,
.quant-grid,
.skill-grid,
.card-grid,
.stack-grid {
  display: grid;
  gap: 1.5rem;
}

.hero-grid {
  grid-template-columns: 1.3fr 0.9fr;
  align-items: end;
}

.hero-copy h1,
.section-heading h2,
.callout-panel h2,
.footer-grid h2,
.project-detail-card h2,
.quant-card h2 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero-copy h1 {
  font-size: clamp(2.8rem, 6vw, 5.4rem);
  max-width: 12ch;
}

.hero-role {
  margin: 1.1rem 0 0;
  color: var(--accent-strong);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.hero-tagline {
  max-width: 38rem;
  margin: 1.4rem 0 0;
  font-size: 1.18rem;
  color: var(--muted);
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 3.25rem;
  padding: 0 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--line);
}

.button-primary {
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 82%, transparent), color-mix(in srgb, var(--accent-alt) 24%, transparent));
  color: #081013;
  font-weight: 600;
}

html[data-theme="light"] .button-primary {
  color: #f9fcfd;
}

.button-secondary {
  background: color-mix(in srgb, var(--surface) 86%, transparent);
}

.panel {
  position: relative;
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 96%, transparent), color-mix(in srgb, var(--surface-strong) 94%, transparent));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.hero-panel,
.prose-block,
.layer-panel,
.experience-card,
.skill-group,
.callout-panel,
.project-detail-card,
.quant-card,
.contact-card {
  padding: 1.6rem;
}

.panel-label,
.eyebrow,
.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel-label,
.eyebrow {
  display: inline-block;
  color: var(--accent-strong);
  font-size: 0.78rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
}

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

.metric-grid.compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card {
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-soft) 92%, transparent);
}

.metric-value {
  display: block;
  font-size: 1.16rem;
  font-weight: 600;
}

.metric-label {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.section-heading {
  margin-bottom: 1.7rem;
}

.section-heading h2 {
  max-width: 14ch;
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.two-column {
  grid-template-columns: 1.2fr 0.9fr;
  align-items: start;
}

.prose-block p,
.layer-list p,
.skill-group p,
.project-detail-grid p,
.quant-card p,
.callout-panel p,
.contact-card span,
.detail-list li {
  color: var(--muted);
}

.prose-block p:first-child,
.layer-list p,
.callout-panel p,
.quant-card p,
.project-detail-grid p {
  margin-top: 0;
}

.prose-block p:last-child,
.layer-list p:last-child,
.callout-panel p:last-child,
.quant-card p:last-child {
  margin-bottom: 0;
}

.layer-list {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.layer-list div {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.layer-list div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.mono {
  color: var(--accent-strong);
  font-size: 0.78rem;
}

.card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.experience-card:nth-child(5) {
  grid-column: span 2;
}

.card-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.1rem;
}

.card-head h3,
.project-detail-card h2,
.skill-group h3 {
  margin: 0;
}

.card-head p {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.1rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--accent-soft) 84%, transparent);
  color: var(--accent-strong);
  font-size: 0.82rem;
  white-space: nowrap;
}

.detail-list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.55rem;
}

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

.skill-group h3 {
  font-size: 1.1rem;
  margin-top: 0.4rem;
}

.callout-panel {
  grid-template-columns: 1.3fr auto;
  align-items: center;
}

.callout-panel h2 {
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  max-width: 14ch;
}

.footer-grid {
  grid-template-columns: 0.95fr 1.05fr;
  align-items: start;
}

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

.contact-card {
  display: grid;
  gap: 0.3rem;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.contact-card:hover,
.contact-card:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 48%, var(--line));
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 98%, transparent), color-mix(in srgb, var(--accent-soft) 35%, transparent));
}

.contact-card strong {
  font-size: 1.02rem;
}

.site-footer {
  padding-top: 2rem;
  padding-bottom: 4rem;
}

.page-hero .hero-copy h1,
.quant-hero .hero-copy h1 {
  font-size: clamp(2.5rem, 5.4vw, 4.8rem);
  max-width: 11ch;
}

.stack-grid {
  gap: 1.4rem;
}

.project-detail-card h2 {
  font-size: 1.85rem;
}

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

.project-detail-grid > div:last-child {
  grid-column: span 2;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
}

.project-detail-grid h3,
.quant-card h2 {
  margin: 0 0 0.4rem;
}

.quant-shell .panel {
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 97%, transparent), color-mix(in srgb, var(--surface-strong) 96%, transparent));
}

.terminal-panel {
  overflow: hidden;
}

.terminal-lines {
  display: grid;
  gap: 0.65rem;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--accent-strong);
}

.terminal-lines span {
  padding: 0.65rem 0.8rem;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid var(--line);
}

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

.quant-card:last-child {
  grid-column: span 2;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 650ms ease, transform 650ms ease;
}

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

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

  .reveal,
  .reveal.is-visible,
  .site-nav a,
  .theme-toggle,
  .button,
  .contact-card {
    transition: none;
    transform: none;
    opacity: 1;
  }
}

@media (max-width: 1024px) {
  .hero-grid,
  .two-column,
  .footer-grid,
  .callout-panel {
    grid-template-columns: 1fr;
  }

  .card-grid,
  .skill-grid,
  .quant-grid,
  .project-detail-grid {
    grid-template-columns: 1fr;
  }

  .project-detail-grid > div:last-child {
    grid-column: auto;
  }

  .experience-card:nth-child(5),
  .quant-card:last-child {
    grid-column: auto;
  }

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

@media (max-width: 760px) {
  .section {
    padding: 4.2rem 0;
  }

  .nav-shell {
    padding: 0.9rem 0;
    min-height: auto;
    flex-wrap: wrap;
  }

  .brand {
    width: 100%;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
    border-radius: 1.2rem;
  }

  .site-nav a {
    flex: 1 1 40%;
    text-align: center;
  }

  .theme-toggle {
    width: 100%;
  }

  .hero {
    padding-top: 5.8rem;
  }

  .hero-copy h1 {
    font-size: clamp(2.4rem, 13vw, 3.6rem);
  }

  .section-heading h2,
  .callout-panel h2 {
    max-width: none;
  }
}