/* ==========================================================================
   Mitisha Surana — personal site
   Contents
     1. Design tokens
     2. Base / reset
     3. Layout helpers
     4. Typography
     5. Navigation
     6. Hero
     7. Sections
     8. Experience timeline
     9. Doctoral research
    10. Skills
    11. Patents & publications
    12. Education
    13. Footer
    14. Wafer graphic
    15. Responsive
    16. Reduced motion
   ========================================================================== */


/* 1. Design tokens ------------------------------------------------------- */

:root{
  --paper: #F5F6F1;
  --paper-alt: #EAECE4;
  --ink: #1B1E1F;
  --muted: #585D62;
  --line: #DADDD3;
  --blue: #2F5C8A;
  --gold: #B4823A;
  --violet: #77599E;

  --serif: 'IBM Plex Serif', Georgia, serif;
  --sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
}


/* 2. Base / reset -------------------------------------------------------- */

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a{ color: var(--blue); text-decoration: none; }
a:hover,
a:focus-visible{ text-decoration: underline; text-underline-offset: 3px; }

:focus-visible{ outline: 2px solid var(--blue); outline-offset: 3px; }


/* 3. Layout helpers ------------------------------------------------------ */

.wrap{ max-width: 940px; margin: 0 auto; padding: 0 28px; }
.prose{ max-width: 640px; }


/* 4. Typography ---------------------------------------------------------- */

h1, h2, h3{
  font-family: var(--serif);
  font-weight: 500;
  margin: 0;
  color: var(--ink);
}

p{ margin: 0 0 1em 0; }

ul{ margin: 0; padding: 0; list-style: none; }


/* 5. Navigation ---------------------------------------------------------- */

nav{
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  background: rgba(245, 246, 241, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.mark{
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.nav-links{ display: flex; gap: 26px; overflow-x: auto; scrollbar-width: none; }
.nav-links::-webkit-scrollbar{ display: none; }

.nav-links a{
  color: var(--ink);
  font-size: 0.92rem;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.nav-links a:hover,
.nav-links a:focus-visible{
  color: var(--blue);
  border-color: var(--blue);
  text-decoration: none;
}


/* 6. Hero ---------------------------------------------------------------- */

.hero{ padding: 64px 0 30px; }

.hero-grid{
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero h1{ font-size: 3.1rem; line-height: 1.05; margin-bottom: 14px; }
.hero .role{ font-size: 1.2rem; color: var(--muted); margin-bottom: 22px; max-width: 30ch; }
.hero .bio{ max-width: 52ch; }

.stat-row{ display: flex; gap: 30px; margin: 26px 0 30px; flex-wrap: wrap; }
.stat{ font-family: var(--mono); }
.stat b{ display: block; font-size: 1.3rem; font-weight: 500; color: var(--ink); }
.stat span{ font-size: 0.82rem; color: var(--muted); }

.contact-links{ display: flex; gap: 22px; flex-wrap: wrap; font-size: 0.95rem; }
.contact-links .locale{ color: var(--muted); }

.wafer-fig{ text-align: center; }
.wafer-fig svg{ width: 100%; max-width: 340px; height: auto; }
.wafer-caption{
  font-size: 0.85rem;
  color: var(--muted);
  max-width: 30ch;
  margin: 14px auto 0;
}


/* 7. Sections ------------------------------------------------------------ */

.section{ padding: 88px 0; border-top: 1px solid var(--line); }
.section h2{ font-size: 1.7rem; margin-bottom: 28px; }
.section-lede{ color: var(--muted); margin-bottom: 40px; max-width: 56ch; }


/* 8. Experience timeline ------------------------------------------------- */

.timeline{
  border-left: 2px solid var(--line);
  padding-left: 32px;
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.role-block{ position: relative; }

.role-block::before{
  content: '';
  position: absolute;
  left: -39px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--blue);
}

.role-block .when{
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.role-block h3{ font-size: 1.2rem; margin-bottom: 2px; }
.role-block .place{ color: var(--muted); font-size: 0.95rem; margin-bottom: 16px; }
.role-block ul{ display: flex; flex-direction: column; gap: 10px; max-width: 66ch; }
.role-block li{ padding-left: 20px; position: relative; }
.role-block li::before{ content: '—'; position: absolute; left: 0; color: var(--muted); }


/* 9. Doctoral research --------------------------------------------------- */

.research-meta{ font-size: 0.95rem; color: var(--muted); margin-bottom: 36px; }
.research-grid{ display: flex; flex-direction: column; gap: 34px; }
.research-item{ border-left: 3px solid var(--gold); padding-left: 24px; }
.research-item h3{ font-size: 1.1rem; margin-bottom: 8px; }
.research-item p{ max-width: 66ch; color: var(--ink); }
.research-item p:last-child{ margin-bottom: 0; }


/* 10. Skills ------------------------------------------------------------- */

.skills-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }

.skills-grid h3{
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.tag-list{ display: flex; flex-wrap: wrap; gap: 8px; }

.tag{
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--paper-alt);
  border: 1px solid var(--line);
  padding: 5px 10px;
  border-radius: 3px;
  color: var(--ink);
}


/* 11. Patents & publications --------------------------------------------- */

.work-group{ margin-bottom: 44px; }
.work-group:last-child{ margin-bottom: 0; }

.work-group h3{
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 18px;
  color: var(--muted);
}

.work-row{
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.work-row:first-child{ border-top: 1px solid var(--line); }
.work-row .year{ font-family: var(--mono); font-size: 0.85rem; color: var(--muted); padding-top: 2px; }
.work-row .citation{ font-size: 0.95rem; }
.work-row .citation em{ font-style: italic; color: var(--muted); }
.work-row a.patent-link{ font-size: 0.85rem; margin-left: 8px; white-space: nowrap; }


/* 12. Education ---------------------------------------------------------- */

.edu-grid{ display: flex; flex-direction: column; gap: 26px; }

.edu-item{
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  padding-bottom: 22px;
}

.edu-item:last-child{ border-bottom: none; padding-bottom: 0; }
.edu-item h3{ font-size: 1.05rem; margin-bottom: 4px; }
.edu-item .school{ color: var(--muted); font-size: 0.95rem; }

.edu-item .meta{
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
  text-align: right;
  white-space: nowrap;
}


/* 13. Footer ------------------------------------------------------------- */

footer{ padding: 90px 0 60px; }
footer h2{ font-size: 1.9rem; margin-bottom: 18px; }
footer .footer-lede{ color: var(--muted); }
footer .contact-links{ margin-top: 10px; font-size: 1.05rem; }
footer .fine{ margin-top: 60px; font-size: 0.82rem; color: var(--muted); }


/* 14. Wafer graphic ------------------------------------------------------ */

.wafer-cell{ transition: fill 1.3s cubic-bezier(.4, 0, .2, 1); }


/* 15. Responsive --------------------------------------------------------- */

@media (max-width: 780px){
  .hero-grid{ grid-template-columns: 1fr; gap: 40px; }
  .hero{ padding-top: 44px; }
  .hero h1{ font-size: 2.3rem; }
  .wafer-fig{ order: -1; max-width: 240px; margin: 0 auto; }
  .skills-grid{ grid-template-columns: 1fr; gap: 32px; }
  .section{ padding: 64px 0; }
  .work-row{ grid-template-columns: 48px 1fr; }
  nav{ padding: 14px 20px; }
  .nav-links{ gap: 18px; }
}


/* 16. Reduced motion ----------------------------------------------------- */

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .wafer-cell{ transition: none; }
}