:root{
  /* Match the screenshots: warm light background + white cards + subtle borders */
  --bg: #f6f6f4;
  --card: #ffffff;
  --text: #111827;   /* near-black */
  --muted: #6b7280;  /* gray */
  --border: #e6e4df; /* warm gray border */
  --shadow: 0 10px 18px rgba(17, 24, 39, 0.10);
  --shadow-soft: 0 14px 28px rgba(17, 24, 39, 0.12);
  --accent: #0f766e; /* teal */

  --container: 1100px;
  --header-h: 72px;
  --radius: 16px;
}

*{ box-sizing: border-box; }

html, body{ height: 100%; }

html {
  scroll-padding-top: var(--header-h);
}

body{
  margin:0;
  font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Visible focus (accessibility) */
:focus-visible{
  outline: 3px solid rgba(15, 118, 110, 0.35);
  outline-offset: 3px;
  border-radius: 10px;
}

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

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 18px;
}

/* Skip link */
.skip-link{
  position:absolute;
  left: 14px;
  top: 12px;
  transform: translateY(-220%);
  background: var(--card);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  z-index: 100;
}
.skip-link:focus{ transform: translateY(0); }

/* Header */
header.site-header{
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(246, 246, 244, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.header-inner{
  height: 100%;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
}

.brand{
  font-weight: 500;
  font-size: 20px;
  letter-spacing: -0.02em;
}

nav.primary-nav{ display:flex; align-items:center; }

.nav-list{
  list-style:none;
  display:flex;
  gap: 22px;
  margin:0; padding:0;
  align-items:center;
}

.nav-link{
  font-weight: 500;
  font-size: 14px;
  color: var(--muted);
  padding: 10px 0;
  position: relative;
}

.nav-link:hover{ color: var(--text); }

.nav-link[aria-current="page"]{ color: var(--accent); }

.nav-link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom: 4px;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
}

/* Mobile menu */
.burger{
  display:none;
  width: 44px; height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  cursor:pointer;
  align-items:center;
  justify-content:center;
  flex-direction: column;
  gap: 4px;
}

.burger span{
  width: 18px; height: 2px;
  background: var(--text);
  border-radius: 2px;
}

.mobile-panel{
  display:none;
  margin-top: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 10px 12px;
}

.mobile-panel .nav-list{
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}

.mobile-panel .nav-link{
  width: 100%;
  padding: 10px 8px;
}

.mobile-panel[aria-hidden="false"]{ display:block; }

/* Main layout */
main{
  padding-top: calc(var(--header-h) + 10px);
  padding-bottom: 70px;
}

/* Hero */
.hero{
  padding: 64px 0 52px;
  text-align:center;
}

.avatar{
  width: 120px; height: 120px;
  border-radius: 999px;
  margin: 0 auto 18px;
  border: 4px solid rgba(17,24,39,0.06);
  background: rgba(17,24,39,0.05);
  display:grid;
  place-items:center;
  overflow:hidden;
}

.avatar img{
  width:100%; height:100%;
  object-fit:cover;
  display:block;
}

.avatar-fallback{
  font-weight: 500;
  font-size: 34px;
  color: #6b7280;
  letter-spacing: -0.02em;
}

.hero h1{
  margin: 0;
  font-size: clamp(34px, 5vw, 36px);
  letter-spacing: -0.03em;
}

.hero .role{
  margin-top: 6px;
  font-size: 18px;
  font-weight: 500;
  color: var(--accent);
}

.hero .lead{
  margin: 18px auto 0;
  max-width: 74ch;
  color: var(--muted);
  font-size: 17px;
}

.icon-links{
  margin-top: 22px;
  display:flex;
  gap: 28px;
  align-items:center;
  justify-content:center;
  flex-wrap: wrap;
  color: #6b7280;
  font-weight: 500;
}

.icon-link{
  display:inline-flex;
  align-items:center;
  gap: 10px;
  padding: 10px 10px;
  border-radius: 12px;
  transition: transform 120ms ease, color 120ms ease, background 120ms ease;
}

.icon-link:hover{
  transform: translateY(-1px);
  color: var(--text);
  background: rgba(17,24,39,0.04);
}
.icon{
  width: 18px;
  height: 18px;
  display:inline-block;
}

/* Section headings */
section{ padding: 48px 0; }

.section-head{ margin-bottom: 26px; }

.section-title{
  margin: 0;
  font-size: 30px;
  letter-spacing: -0.03em;
}

.section-subtitle{
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 16px;
}

/* Cards (border + hover shadow) */
.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: none;
  transition: box-shadow 140ms ease, transform 140ms ease;
}
.card:hover{
  box-shadow: var(--shadow-soft);
  transform: translateY(-1px);
}

/* Experience/Education in single column */
.stack{
  display:grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

/* Projects - 3 per row */
.grid-three{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

/* Experience/Education card layout */
.entry{
  padding: 26px 28px;
}

.entry-top{
  display:flex;
  justify-content: space-between;
  gap: 12px;
  align-items:flex-start;
}

.entry-title{
  margin: 0;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.entry-org{
  margin: 6px 0 0;
  color: var(--accent);
  font-weight: 500;
  font-size: 18px;
}

.entry-period{
  color: var(--muted);
  font-weight: 500;
  font-size: 16px;
  padding-top: 10px;
  white-space: nowrap;
}

.entry-desc{
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.pills{
  margin-top: 18px;
  display:flex;
  flex-wrap: wrap;
  gap: 12px;
}

.pill{
  display:inline-flex;
  align-items:center;
  padding:1px 10px;
  border-radius: 12px;
  background: rgba(17,24,39,0.05);
  color: #111827;
  font-weight: 500;
  font-size: 12px;
}

/* Project cards */
.proj{
  padding: 26px 26px 22px;
  display:flex;
  flex-direction: column;
  min-height: 310px;
}

.proj-title{
  margin: 0;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.proj-desc{
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
  flex: 1;
}

.proj-link{
  margin-top: 10px;
  color: var(--accent);
  font-size: 16px;
  font-weight: 500;
  display:inline-flex;
  align-items:center;
  gap: 10px;
  width: fit-content;
  padding: 6px 8px;
  border-radius: 12px;
  transition: background 120ms ease;
}

.proj-link:hover{
  background: rgba(15,118,110,0.10);
}

/* Skills */
.skills-wrap{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px 60px;
  align-items:start;
}

.skill-group h3{
  margin: 0 0 12px 0;
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #111827;
}

.skill-pills{
  display:flex;
  flex-wrap: wrap;
  gap: 12px;
}

.skill-pill{
  padding: 5px 10px;
  border-radius: 12px;
  background: rgba(17,24,39,0.05);
  font-weight: 500;
}

/* Contact */
.contact{
  text-align:center;
  padding-top: 34px;
}

.contact h2{
  margin: 0;
  font-size: 30px;
  letter-spacing: -0.03em;
}

.contact p{
  margin: 12px auto 0;
  max-width: 76ch;
  color: var(--muted);
  font-size: 18px;
}

.cta{
  margin-top: 22px;
  display:inline-flex;
  align-items:center;
  gap: 12px;
  padding: 14px 22px;
  border-radius: 14px;
  border: 0;
  background: var(--accent);
  color: #fff;
  font-weight: 500;
  cursor:pointer;
  box-shadow: 0 14px 22px rgba(15,118,110,0.18);
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.cta:hover{
  transform: translateY(-1px);
  box-shadow: 0 18px 28px rgba(15,118,110,0.22);
}

.contact-icons{
  margin-top: 22px;
  display:flex;
  justify-content:center;
  gap: 22px;
  color: #6b7280;
}

.contact-icons a{
  display:inline-flex;
  padding: 10px;
  border-radius: 12px;
  transition: background 120ms ease, transform 120ms ease, color 120ms ease;
}

.contact-icons a:hover{
  background: rgba(17,24,39,0.05);
  transform: translateY(-1px);
  color: var(--text);
}

footer{
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align:center;
  color: var(--muted);
  background: rgba(246,246,244,0.6);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 980px){
  nav.primary-nav{ display:none; }
  .burger{ display:inline-flex; }

  .grid-three{ grid-template-columns: 1fr; } /* on mobile: stack projects */
  .skills-wrap{ grid-template-columns: 1fr; gap: 22px; }

  .section-title{ font-size: 25px; }
  .contact h2{ font-size: 25px; }
  .entry-period{ font-size: 14px; }
}

@media (prefers-reduced-motion: reduce){
  *{ scroll-behavior: auto !important; transition: none !important; }
}