:root {
  --ink: #15302f;
  --muted: #607573;
  --blue: #0abab5;
  --blue-dark: #087d79;
  --blue-soft: #e9fbfa;
  --line: #d8eeec;
  --surface: #ffffff;
  --background: #ffffff;
  --radius: 20px;
  --shadow: 0 20px 60px rgba(7, 108, 105, 0.08);
  --max-width: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--background);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
.container { width: min(calc(100% - 48px), var(--max-width)); margin-inline: auto; }
.skip-link {
  position: fixed; top: 12px; left: 12px; z-index: 100;
  transform: translateY(-160%); padding: 10px 16px; border-radius: 8px;
  color: white; background: var(--blue-dark);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky; top: 0; z-index: 20;
  border-bottom: 1px solid rgba(216, 238, 236, 0.88);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
}
.nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.wordmark {
  display: grid; place-items: center; width: 38px; height: 38px;
  border-radius: 11px; color: white; background: var(--blue-dark);
  font-size: 13px; font-weight: 750; letter-spacing: 0.04em; text-decoration: none;
}
.nav-links { display: flex; align-items: center; min-width: 0; gap: 34px; margin-left: auto; }
.nav-links a, .nav-email, .nav-more summary { color: #476360; font-size: 14px; font-weight: 600; text-decoration: none; transition: color 180ms ease; }
.nav-links a:hover, .nav-links a:focus-visible, .nav-email:hover, .nav-email:focus-visible, .nav-more summary:hover, .nav-more summary:focus-visible { color: var(--blue); }
.nav-email { padding-left: 28px; border-left: 1px solid var(--line); }
.nav-more { position: relative; flex: 0 0 auto; }
.nav-more summary { display: flex; align-items: center; gap: 6px; cursor: pointer; list-style: none; }
.nav-more summary::-webkit-details-marker { display: none; }
.nav-more-icon { display: inline-block; font-size: 17px; font-weight: 400; line-height: 1; transition: transform 180ms ease; }
.nav-more[open] .nav-more-icon { transform: rotate(45deg); }
.nav-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 30;
  min-width: 140px;
  padding: 8px;
  /* border: 1px solid #edd8b5; */
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 18px 44px rgba(91, 57, 12, .14);
  text-align: center;
}
.nav-menu .after-hours-link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 5px 6px;
  border-radius: 9px;
  color: #d68a1f;
  background: #000000;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}
.after-hours-link > span { position: absolute; left: 12px; width: 7px; height: 7px; border-radius: 50%; background: #d68a1f; box-shadow: 0 0 0 4px rgba(214, 138, 31, .12); }
.nav-menu .after-hours-link:hover, .nav-menu .after-hours-link:focus-visible { color: #754400; background: #000000; }

.brand { margin-right: auto; font-family: Arial, sans-serif; font-size: 12px; font-weight: 700; letter-spacing: .15em; text-decoration: none; }

.hero {
  position: relative;
  isolation: isolate;
  min-height: calc(100svh - 76px);
  padding-block: clamp(72px, 10vh, 112px);
  display: grid;
  place-items: center;
  overflow: hidden;
  text-align: left;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url("assets/images/reliable-ml-hero.png") center / cover no-repeat;
  filter: blur(10px) saturate(.88);
  opacity: .82;
  transform: scale(1.04);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, rgba(255, 255, 255, .64) 0%, rgba(255, 255, 255, .28) 58%, rgba(255, 255, 255, .1) 100%);
}
.hero-copy {
  padding: 0;
}
.eyebrow, .card-kicker {
  margin: 0 0 22px; color: var(--blue); font-size: 12px; font-weight: 750;
  letter-spacing: 0.12em; text-transform: uppercase;
}
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 9px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 5px rgba(10, 186, 181, 0.1); vertical-align: 1px; }
h1 { max-width: 850px; margin: 0; font-size: clamp(3rem, 6vw, 5.65rem); line-height: 0.98; letter-spacing: -0.057em; font-weight: 650; }
h1 span { color: var(--blue); }
.hero-intro { max-width: 700px; margin: 34px 0 0; color: #496461; font-size: clamp(1.05rem, 1.5vw, 1.25rem); line-height: 1.7; }
.hero-actions { display: flex; align-items: center; justify-content: flex-start; flex-wrap: wrap; gap: 28px; margin-top: clamp(56px, 8vh, 78px); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 20px; min-height: 52px; padding: 0 22px; border-radius: 10px; font-size: 14px; font-weight: 700; text-decoration: none; transition: transform 180ms ease, background 180ms ease, box-shadow 180ms ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: white; background: var(--blue-dark); box-shadow: 0 10px 25px rgba(8, 125, 121, 0.2); }
.button-primary:hover { background: #066b68; box-shadow: 0 14px 30px rgba(8, 125, 121, 0.26); }
.text-link { color: #496461; font-size: 14px; font-weight: 700; text-decoration: none; border-bottom: 1px solid #9fcfcd; }
.text-link:hover { color: var(--blue); border-color: var(--blue); }
.hero-note { align-self: end; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.note-label { margin: 0 0 14px; color: var(--blue); font-size: 11px; font-weight: 750; letter-spacing: 0.12em; text-transform: uppercase; }
.hero-note > p:nth-child(2) { margin: 0; font-size: 18px; line-height: 1.55; }
.note-meta { display: flex; justify-content: space-between; gap: 16px; margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; letter-spacing: .07em; text-transform: uppercase; }

.section { padding-block: 48px 96px; scroll-margin-top: 74px; }
.section + .section { border-top: 1px solid var(--line); }
.section-heading { display: flex; align-items: baseline; gap: 24px; margin-bottom: 58px; }
.section-index { margin: 0; color: var(--blue); font: 750 12px/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.25rem); line-height: 1.1; letter-spacing: -0.04em; font-weight: 650; }
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px 88px; align-items: stretch; }
.about-main { min-width: 0; }
.about-copy p { max-width: 680px; margin: 0 0 22px; color: #556e6b; }
.about-copy .lead { color: var(--ink); font-size: clamp(1.35rem, 2.3vw, 1.85rem); line-height: 1.45; letter-spacing: -0.025em; }
.about-portrait { position: relative; overflow: hidden; align-self: stretch; min-height: 0; margin: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--blue-soft); box-shadow: var(--shadow); }
.about-portrait img { position: absolute; inset: 0; display: block; width: 100%; height: 100%; object-fit: cover; object-position: center 58%; }
.education-card { grid-column: 1 / -1; display: grid; grid-template-columns: 150px minmax(0, 1.2fr) minmax(260px, .8fr); gap: 8px 40px; align-items: start; padding: 34px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.card-topline { grid-row: 1 / span 3; display: flex; flex-direction: column; gap: 8px; color: var(--muted); font-size: 12px; }
.card-kicker { margin-bottom: 16px; }
.education-card .card-kicker { margin: 0; }
.education-card h3 { grid-column: 2; margin: 0; font-size: 25px; letter-spacing: -0.025em; }
.degree { margin: 0; color: #425f5d; }
.education-card .degree, .education-card .location { grid-column: 2; }
.location { margin: 0; color: var(--muted); font-size: 14px; }
.education-card .interest-list { grid-column: 3; grid-row: 1 / span 3; align-self: center; }
.interest-list, .tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.interest-list span, .tag-list span { padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; color: #4e6966; background: #f7fdfc; font-size: 12px; }

.project-card { overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: var(--surface); box-shadow: var(--shadow); }
.project-visual { margin: 0; border-bottom: 1px solid var(--line); background: #ffffff; }
.project-visual img { display: block; width: 100%; height: auto; opacity: .82; filter: blur(.45px) saturate(.76) contrast(.96); transform: scale(1.004); }
.project-content { padding: 54px; }
.project-title-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 30px; }
.project-title-row h3 { max-width: 680px; margin: 0; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.08; letter-spacing: -.04em; }
.round-link { flex: 0 0 auto; display: grid; place-items: center; width: 50px; height: 50px; border: 1px solid var(--line); border-radius: 50%; color: var(--blue-dark); font-size: 22px; text-decoration: none; transition: transform 180ms ease, color 180ms ease, background 180ms ease; }
.round-link:hover { transform: translateY(-2px); color: white; background: var(--blue-dark); }
.project-summary { max-width: 850px; margin: 30px 0 46px; color: #536c69; font-size: 18px; }
.project-details { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; padding-block: 38px; border-block: 1px solid var(--line); }
.project-details h4, .contribution-block h4 { margin: 0 0 12px; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.project-details p { margin: 0; color: var(--muted); font-size: 14px; }
.contribution-block { display: grid; grid-template-columns: 160px 1fr; gap: 30px; padding-block: 38px; }
.contribution-block ul { margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 36px; list-style: none; counter-reset: contributions; }
.contribution-block li { position: relative; padding-left: 28px; color: #556e6b; font-size: 14px; counter-increment: contributions; }
.contribution-block li::before { content: "0" counter(contributions); position: absolute; left: 0; color: var(--blue); font: 700 10px/1.7 ui-monospace, monospace; }
.tag-list { padding-top: 26px; border-top: 1px solid var(--line); }
.future-project { display: flex; align-items: baseline; gap: 50px; margin-top: 24px; padding: 28px 34px; border: 1px dashed #b5dedb; border-radius: 16px; }
.future-project .card-kicker, .future-project p { margin: 0; }
.future-project > p:last-child { color: var(--muted); }

.skills-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
.skill-group { min-height: 250px; padding: 34px 28px; border-right: 1px solid var(--line); }
.skill-group:first-child { padding-left: 0; }
.skill-group:last-child { border-right: 0; padding-right: 0; }
.skill-group > p { margin: 0 0 24px; color: var(--blue); font-size: 12px; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
.skill-group ul { margin: 0; padding: 0; list-style: none; }
.skill-group li { margin-bottom: 9px; color: #496461; font-size: 14px; }

.contact-section { margin-top: 60px; color: white; background: var(--blue-dark); scroll-margin-top: 76px; }
.contact-inner { padding-block: 104px; }
.contact-inner .eyebrow { color: #bcf4f1; }
.contact-inner h2 { max-width: 830px; font-size: clamp(2.5rem, 5.4vw, 4.6rem); }
.contact-inner > p:not(.eyebrow) { max-width: 650px; margin: 26px 0 0; color: #d5f4f2; font-size: 17px; }
.contact-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 30px; margin-top: 40px; }
.button-light { color: var(--blue-dark); background: white; }
.button-light:hover { background: var(--blue-soft); }
.contact-link { color: #e7fbfa; font-size: 14px; font-weight: 650; text-decoration: none; border-bottom: 1px solid #70c9c5; }
.site-footer { color: #c5e9e7; background: #066b68; }
.footer-inner { min-height: 90px; display: flex; align-items: center; justify-content: space-between; gap: 24px; font-size: 12px; }
.footer-inner p { margin: 0; }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity 650ms ease, transform 650ms ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
:focus-visible { outline: 3px solid rgba(10, 186, 181, .45); outline-offset: 4px; }

@media (max-width: 900px) {
  .nav { gap: 18px; }
  .nav-links { gap: 20px; }
  .nav-email { display: none; }
  .hero { min-height: calc(100svh - 76px); padding-block: clamp(64px, 10vh, 90px); }
  .hero-note { max-width: 480px; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-portrait { height: 420px; }
  .about-portrait img { height: 100%; }
  .education-card { grid-column: 1; grid-template-columns: 130px minmax(0, 1.2fr) minmax(220px, .8fr); }
  .project-details { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .skill-group, .skill-group:first-child, .skill-group:last-child { min-height: 0; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .skill-group:nth-child(2n) { border-right: 0; }
  .skill-group:nth-last-child(-n+2) { border-bottom: 0; }
}

@media (max-width: 650px) {
  .container { width: min(calc(100% - 32px), var(--max-width)); }
  .nav { min-height: 66px; gap: 16px; }
  .nav-links { gap: 17px; overflow-x: auto; scrollbar-width: none; }
  .nav-links a { font-size: 12px; }
  .nav-links a:first-child { display: none; }
  .nav-more summary { font-size: 12px; }
  .nav-menu { top: calc(100% + 17px); }
  .nav-email { display: none; }
  .hero { min-height: calc(100svh - 66px); padding-block: 48px; }
  .hero::before { opacity: .72; }
  h1 { font-size: clamp(2.75rem, 13.5vw, 4rem); }
  .hero-intro { margin-top: 28px; }
  .hero-actions { gap: 20px; margin-top: 48px; }
  .section { padding-block: 76px; }
  .section-heading { margin-bottom: 40px; }
  .about-copy .lead { font-size: 1.35rem; }
  .about-portrait { height: 360px; }
  .education-card { display: grid; grid-template-columns: 1fr; gap: 8px; padding: 26px; }
  .education-card h3, .education-card .degree, .education-card .location, .education-card .interest-list { grid-column: 1; grid-row: auto; }
  .education-card .card-topline { grid-column: 1; grid-row: auto; flex-direction: row; justify-content: space-between; margin-bottom: 18px; }
  .education-card .interest-list { margin-top: 18px; }
  .project-content { padding: 34px 24px; }
  .project-title-row h3 { font-size: 2.1rem; }
  .round-link { width: 44px; height: 44px; }
  .project-summary { margin-block: 24px 34px; font-size: 16px; }
  .contribution-block { grid-template-columns: 1fr; gap: 12px; }
  .contribution-block ul { grid-template-columns: 1fr; }
  .future-project { align-items: flex-start; flex-direction: column; gap: 10px; }
  .skills-grid { grid-template-columns: 1fr; }
  .skill-group, .skill-group:first-child, .skill-group:last-child { padding: 26px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .skill-group:nth-last-child(2) { border-bottom: 1px solid var(--line); }
  .contact-inner { padding-block: 78px; }
  .contact-inner h2 { font-size: 2.5rem; }
  .footer-inner { padding-block: 26px; align-items: flex-start; flex-direction: column; gap: 8px; }
  .footer-inner p:nth-child(2) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}