/* --- Design tokens --- */
:root {
  --color-bg: oklch(0.99 0.003 240);
  --color-text: oklch(0.2 0.01 240);
  --color-muted-dark: oklch(0.3 0.01 240);
  --color-muted: oklch(0.42 0.01 240);
  --color-muted-light: oklch(0.45 0.01 240);
  --color-muted-lighter: oklch(0.55 0.01 240);
  --color-nav-inactive: oklch(0.35 0.01 240);
  --color-accent: oklch(0.5 0.16 230);
  --color-border: oklch(0.92 0.01 240);
  --color-teal-bg: oklch(0.96 0.025 230);
  --color-teal-border: oklch(0.84 0.05 230);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  font-family: 'IBM Plex Sans', sans-serif;
  color: var(--color-text);
}

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

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

/* --- Nav --- */
.site-nav {
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: oklch(0.99 0.003 240 / 0.92);
  backdrop-filter: blur(6px);
  z-index: 10;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: 26px 64px;
}

.site-nav .wordmark {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 23px;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.site-nav .nav-links {
  display: flex;
  gap: 36px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.site-nav .nav-links a {
  color: var(--color-nav-inactive);
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
}

.site-nav .nav-links a.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  font-size: 12.5px;
  color: var(--color-muted-lighter);
  text-align: center;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 64px;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  font-family: 'IBM Plex Sans', sans-serif;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  box-shadow: 0 10px 26px rgba(20, 40, 70, 0.1);
  transform: translateY(-3px);
}

.btn-filled {
  background: var(--color-accent);
  color: #fff;
}

.btn-outline {
  border: 1.5px solid oklch(0.85 0.02 240);
  color: oklch(0.3 0.01 240);
}

/* --- About / home page --- */
.about-hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  max-width: 1280px;
  margin: 0 auto;
}

.about-hero-content {
  padding: 64px 64px 56px;
}

.eyebrow {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.03em;
  margin-bottom: 18px;
}

.about-hero-content h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 44px;
  font-weight: 700;
  line-height: 1.18;
  max-width: 620px;
  margin: 0;
}

.about-hero-content p.lede {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-muted);
  max-width: 520px;
  margin-top: 22px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

.photo-slot {
  background-image: repeating-linear-gradient(135deg, oklch(0.94 0.02 230) 0px, oklch(0.94 0.02 230) 10px, oklch(0.88 0.05 210) 10px, oklch(0.88 0.05 210) 20px);
  display: flex;
  align-items: center;
  justify-content: center;
  font: 500 11px 'IBM Plex Mono', monospace;
  color: rgba(0, 0, 0, 0.4);
  letter-spacing: 0.02em;
  min-height: 320px;
}

.photo-slot.has-photo {
  background-image: none;
  padding: 40px;
}

.photo-slot img {
  width: min(380px, 100%);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 8px;
  border: 2px solid var(--color-teal-border);
  box-shadow: 0 6px 20px rgba(20, 40, 70, 0.12);
}

.teal-band {
  background: var(--color-teal-bg);
}

.about-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 48px 64px 64px;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
}

.col-label {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.role-block + .role-block {
  margin-top: 18px;
}

.role-title {
  font-weight: 600;
  font-size: 15.5px;
}

.role-detail {
  font-size: 13.5px;
  color: var(--color-muted-light);
  margin-top: 3px;
}

.about-columns p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--color-muted-dark);
  margin: 0;
}

/* --- Resume page --- */
.resume-page {
  padding: 56px 64px 72px;
  max-width: 840px;
  margin: 0 auto;
}

.resume-header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}

.resume-header-row h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  margin: 0;
}

.resume-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.resume-links a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  transition: transform 0.15s ease;
}

.resume-links a:hover {
  transform: translateY(-3px);
}

.resume-location {
  font-size: 13.5px;
  color: var(--color-muted-light);
  margin-bottom: 36px;
}

.resume-section {
  margin-bottom: 36px;
}

.resume-section:last-child {
  margin-bottom: 0;
}

.resume-section-label {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}

.education-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

.certifications-grid {
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.education-grid .degree {
  font-weight: 600;
  font-size: 14.5px;
}

.education-grid .school {
  font-size: 13px;
  color: var(--color-muted-light);
}

.resume-entry {
  margin-bottom: 22px;
}

.resume-entry:last-child {
  margin-bottom: 0;
}

.resume-entry-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 6px;
}

.resume-entry-main {
  display: flex;
  flex-direction: column;
}

.resume-entry-title {
  font-weight: 600;
  font-size: 15px;
}

.resume-entry-org {
  font-size: 14px;
  color: var(--color-muted-light);
}

.resume-entry-date {
  font-size: 13px;
  color: var(--color-muted-light);
  white-space: nowrap;
}

.resume-entry p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-muted-dark);
  margin: 8px 0 0;
}

.skills-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.skills-grid .skill-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 6px;
}

.skills-grid .skill-list {
  font-size: 13.5px;
  color: var(--color-muted);
  line-height: 1.9;
}

.inst-link {
  color: inherit;
  text-decoration: none;
}

.inst-link:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* --- Projects listing page --- */
.projects-page {
  padding: 56px 64px 72px;
  max-width: 1280px;
  margin: 0 auto;
}

.projects-page h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 10px;
}

.projects-intro {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-muted);
  max-width: 640px;
  margin: 0 0 40px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1.5px solid var(--color-teal-border);
  border-radius: 8px;
  padding: 28px 26px;
  background: var(--color-teal-bg);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  min-height: 220px;
}

.project-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 10px 26px rgba(20, 40, 70, 0.1);
  transform: translateY(-3px);
}

.project-card-arrow {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 18px;
  line-height: 1;
  color: var(--color-accent);
}

.project-card-eyebrow {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.project-card h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 12px;
  padding-right: 20px;
}

.project-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-muted);
  margin: 0;
}

/* --- Project detail page --- */
.project-detail {
  padding: 56px 64px 72px;
  max-width: 760px;
  margin: 0 auto;
}

.project-detail-back {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 24px;
}

.project-detail h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 10px;
}

.project-detail-subtitle {
  font-size: 14.5px;
  color: var(--color-muted-light);
  font-style: italic;
  margin-bottom: 32px;
}

.project-detail-subtitle-group .project-detail-subtitle {
  margin-bottom: 2px;
}

.project-detail-subtitle-group .project-detail-subtitle:last-child {
  margin-bottom: 32px;
}

.project-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 32px 0;
}

.project-detail-note {
  font-size: 13px;
  color: var(--color-muted-lighter);
  margin-top: -20px;
  margin-bottom: 32px;
}

.project-detail-prose p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-muted-dark);
  margin: 0 0 20px;
}

.project-detail-prose h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin: 32px 0 12px;
}

.project-detail-prose ul {
  margin: 0 0 20px;
  padding-left: 20px;
}

.project-detail-prose li {
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-muted-dark);
  margin-bottom: 8px;
}

.project-detail-prose a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}

.projects-intro a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--color-teal-border);
  text-underline-offset: 2px;
}

/* --- Responsive --- */
@media (max-width: 720px) {
  .site-nav,
  .about-hero-content,
  .about-columns,
  .resume-page,
  .projects-page,
  .project-detail {
    padding-left: 24px;
    padding-right: 24px;
  }

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

  .about-hero {
    grid-template-columns: 1fr;
  }

  .about-hero-content {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .photo-slot {
    min-height: 220px;
  }

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

  .about-hero-content h1 {
    font-size: 32px;
  }

  .education-grid,
  .skills-grid {
    grid-template-columns: 1fr;
  }
}