/* Roman Selyanchyn — academic CV
   Design system shared with the Q-ENERGY Innovator Unit site. */

:root{
  --paper:#f7f5f1;--paper2:#efece6;--ink:#231916;--muted:#6b6560;--line:#ddd6ca;
  --blue:#165193;--silver:#8f9499;--wine:#9c2350;--gold:#c9962f;
  /* All-sans (Inter). --serif kept as an alias so existing rules pick up Inter too. */
  --sans:"Inter","Noto Sans JP",system-ui,sans-serif;
  --serif:"Inter","Noto Sans JP",system-ui,sans-serif;
  --max:1080px;--g:clamp(20px,4vw,56px);
}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;overflow-x:clip;scroll-behavior:smooth}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.65;overflow-x:clip}
body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.35;z-index:-1;
  background-image:radial-gradient(rgba(22,81,147,.06) 1px,transparent 1px);background-size:18px 18px}
a{color:var(--blue);text-underline-offset:3px}
img{max-width:100%}

/* ── Topbar ─────────────────────────────────────────────── */
.topbar{position:sticky;top:0;z-index:50;background:rgba(247,245,241,.84);
  backdrop-filter:saturate(140%) blur(10px);-webkit-backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line)}
/* The topbar runs wider than the --max content column: name + affiliations + an
   eight-item nav + the language toggle do not fit in 1080px at laptop widths. */
.topbar-inner{max-width:1240px;margin:0 auto;padding:14px var(--g);display:flex;align-items:center;
  justify-content:space-between;gap:16px;position:relative}
.program-mark{display:flex;align-items:center;gap:7px;font-family:var(--serif);font-weight:500;
  font-size:17px;letter-spacing:.01em;color:var(--ink);flex-shrink:0}
.program-mark .pm-name{display:flex;align-items:center;gap:10px;font:inherit;letter-spacing:inherit;
  color:inherit;text-decoration:none;transition:color .2s}
.program-mark .pm-name:hover{color:var(--blue)}
.program-mark .dot{width:10px;height:10px;background:linear-gradient(135deg,var(--wine),var(--blue),var(--silver));
  border-radius:2px;transform:rotate(45deg);flex-shrink:0}
.program-mark small{display:flex;align-items:center;gap:6px;font-family:var(--sans);font-size:10px;
  font-weight:500;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);white-space:nowrap}
.program-mark small a{color:inherit;text-decoration:none;transition:color .2s}
.program-mark small a:hover{color:var(--blue)}
.program-mark .pm-sep{opacity:.4;font-weight:400}
.landing-nav{display:flex;align-items:center;gap:2px}
.landing-nav a{font-family:var(--sans);font-size:12px;font-weight:500;color:var(--muted);
  text-decoration:none;padding:6px 7px;border-radius:6px;transition:color .2s,background .2s}
.landing-nav a:hover{color:var(--blue);background:rgba(22,81,147,.06)}
.landing-nav a.active{color:var(--blue);background:rgba(22,81,147,.09)}
/* EN / 日本語 switch — same pill toggle as the Q-ENERGY student site. */
.lang-toggle{display:flex;padding:3px;background:var(--paper2);border:1px solid var(--line);
  border-radius:999px;font-family:var(--sans);font-size:12px;font-weight:600;letter-spacing:.06em;
  position:relative;flex-shrink:0;margin-left:auto}
/* A min-width wider than "日本語" needs, on both halves, is what makes the 50% pill land
   exactly on the active button even though "EN" and "日本語" differ in length.
   nowrap stops the Japanese label breaking mid-word into two lines. */
.lang-toggle button{flex:1 1 auto;min-width:56px;white-space:nowrap;text-align:center;appearance:none;
  border:0;background:transparent;padding:5px 8px;font-size:11.5px;border-radius:999px;color:var(--muted);
  cursor:pointer;font:inherit;letter-spacing:inherit;transition:color .25s ease;z-index:1}
.lang-toggle button.is-active{color:var(--paper)}
.lang-toggle .pill{position:absolute;top:3px;bottom:3px;left:3px;width:calc(50% - 3px);background:var(--blue);
  border-radius:999px;transition:transform .35s cubic-bezier(.5,.15,.2,1);z-index:0}
.lang-toggle[data-lang="ja"] .pill{transform:translateX(100%)}
@media print{.lang-toggle{display:none}}

.menu-btn{display:none;align-items:center;justify-content:center;width:42px;height:42px;flex-shrink:0;
  padding:0;border:1px solid var(--line);border-radius:10px;background:var(--paper2);color:var(--ink);cursor:pointer}
.menu-btn svg{width:20px;height:20px;display:block}
.menu-btn[aria-expanded="true"]{background:var(--blue);color:var(--paper);border-color:var(--blue)}
@media(max-width:1140px){
  .program-mark small{display:none}
  .menu-btn{display:inline-flex}
  .landing-nav{display:none;position:absolute;top:calc(100% + 1px);left:0;right:0;flex-direction:column;
    align-items:stretch;gap:2px;background:var(--paper);border-bottom:1px solid var(--line);
    box-shadow:0 14px 30px rgba(35,25,22,.13);padding:10px;z-index:60}
  .landing-nav.open{display:flex}
  .landing-nav a{padding:13px 14px;border-radius:8px;font-size:15px}
}

/* ── Hero ───────────────────────────────────────────────── */
.hero{max-width:var(--max);margin:0 auto;padding:clamp(48px,7vw,92px) var(--g) clamp(36px,5vw,64px);
  display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(28px,5vw,64px);align-items:center}
.hero-photo{order:1}
.hero-photo img{width:100%;max-width:320px;aspect-ratio:4/5;object-fit:cover;object-position:center top;
  border-radius:18px;box-shadow:0 1px 0 rgba(35,25,22,.04),0 30px 80px -30px rgba(35,25,22,.28)}
.hero-copy{order:2}
.hero-copy .eyebrow{font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.18em;
  text-transform:uppercase;color:var(--blue);margin:0 0 18px;display:flex;align-items:center;gap:10px}
.hero-copy .eyebrow:before{content:"";width:24px;height:1px;background:var(--blue)}
.hero-copy h1{font-family:var(--sans);font-weight:700;font-size:clamp(34px,4.6vw,56px);line-height:1.04;
  letter-spacing:-.03em;color:var(--ink);margin:0 0 8px}
.hero-names{font-family:var(--sans);font-size:14.5px;font-weight:500;color:var(--muted);letter-spacing:.02em;margin:0 0 18px}
.hero-role{font-family:var(--serif);font-size:clamp(16px,1.8vw,19px);line-height:1.6;color:#4a423e;margin:0 0 6px}
.hero-affil{font-family:var(--sans);font-size:14px;color:var(--muted);margin:0}
.hero-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}
.chip-link{display:inline-flex;align-items:center;gap:6px;padding:8px 15px;border-radius:999px;
  background:rgba(255,255,255,.6);border:1px solid var(--line);font-family:var(--sans);font-size:12.5px;
  font-weight:600;color:var(--blue);text-decoration:none;transition:background .2s,transform .2s}
.chip-link:hover{background:#fff;transform:translateY(-1px)}
@media(max-width:780px){
  .hero{grid-template-columns:1fr;gap:24px;text-align:left}
  .hero-photo{order:0;justify-self:start}
  .hero-photo img{max-width:200px}
}

/* ── Sections ───────────────────────────────────────────── */
.section{max-width:var(--max);margin:0 auto;padding:clamp(44px,5vw,72px) var(--g);scroll-margin-top:76px}
.section+.section{border-top:1px solid var(--line)}
.hero{scroll-margin-top:76px}
.kicker{font-family:var(--sans);font-size:11px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;
  color:var(--blue);margin:0 0 22px;display:flex;align-items:center;gap:10px}
.kicker:before{content:"";width:24px;height:1px;background:var(--blue)}
.section h2{font-family:var(--sans);font-weight:700;font-size:clamp(24px,2.8vw,33px);letter-spacing:-.02em;
  color:var(--ink);margin:0 0 18px;line-height:1.15}
.lead{font-family:var(--sans);font-size:clamp(15px,1.5vw,16.5px);line-height:1.75;color:#4a423e;margin:0 0 16px;max-width:70ch}

/* ── About: interests + the h-index line ────────────────── */
.about-meta{font-family:var(--sans);font-size:13.5px;color:var(--muted);margin:0 0 20px}
.about-meta b{color:var(--ink);font-weight:600}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 4px}
.tag{font-family:var(--sans);font-size:12.5px;font-weight:500;color:var(--ink);background:var(--paper2);
  border:1px solid var(--line);border-radius:999px;padding:6px 13px}
.stats-note{font-family:var(--sans);font-size:12.5px;color:var(--muted);margin:22px 0 0}
.stats-note a{color:inherit;text-decoration:underline;text-underline-offset:2px}
.stats-note a:hover{color:var(--blue)}

/* ── Timeline (experience / education) ──────────────────── */
.timeline{display:flex;flex-direction:column;gap:12px}
.tl-item{display:grid;grid-template-columns:168px 1fr;gap:clamp(12px,3vw,30px);
  background:rgba(255,255,255,.45);border:1px solid var(--line);border-radius:14px;
  padding:18px 22px;box-shadow:0 18px 50px -34px rgba(35,25,22,.3)}
.tl-date{font-family:var(--sans);font-size:12.5px;font-weight:600;letter-spacing:.04em;color:var(--blue);
  padding-top:3px;display:flex;align-items:baseline;gap:8px}
.tl-date:before{content:"";flex:none;width:6px;height:6px;border-radius:50%;background:var(--blue);
  transform:translateY(-2px)}
.tl-title{font-family:var(--sans);font-weight:600;font-size:17px;color:var(--ink);margin:0 0 2px;line-height:1.3}
.tl-org{font-family:var(--sans);font-size:13.5px;font-weight:600;color:var(--ink);margin:0 0 2px}
.tl-meta{font-family:var(--sans);font-size:12.5px;color:var(--muted);margin:0 0 6px}
.tl-desc{font-family:var(--serif);font-size:14px;color:var(--muted);line-height:1.65;margin:0}
.tl-thesis{font-family:var(--serif);font-style:italic;font-size:13.5px;color:var(--muted);margin:4px 0 0}
@media(max-width:620px){.tl-item{grid-template-columns:1fr;gap:4px}.tl-date{padding-top:0}}

/* ── Publications ───────────────────────────────────────── */
.pub-list{display:flex;flex-direction:column;gap:0}
.pub{display:grid;grid-template-columns:62px 1fr;gap:clamp(12px,2.5vw,26px);padding:18px 0;
  border-top:1px solid var(--line)}
.pub:first-child{border-top:0}
.pub-year{font-family:var(--sans);font-weight:700;font-size:17px;color:var(--blue)}
.pub-title{font-family:var(--sans);font-weight:600;font-size:15.5px;line-height:1.4;color:var(--ink);margin:0 0 4px}
.pub-title a{color:inherit;text-decoration:none}
.pub-title a:hover{color:var(--blue);text-decoration:underline}
.pub-authors{font-family:var(--sans);font-size:13px;color:var(--muted);line-height:1.55;margin:0 0 3px}
.pub-authors .me{color:var(--ink);font-weight:700}
.pub-venue{font-family:var(--sans);font-size:13px;color:var(--ink);margin:0}
.pub-venue em{color:var(--muted);font-style:italic}
.pub-filings{font-family:var(--sans);font-size:13px;color:var(--muted);margin:6px 0 0}
.pub-filings a{color:var(--blue);text-decoration:none;font-weight:600}
.pub-filings a:hover{text-decoration:underline}
.pub-filings .pat-year{color:var(--muted);font-weight:400}
.pub-badges{margin-top:6px;display:flex;flex-wrap:wrap;gap:6px}
.badge{font-family:var(--sans);font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  padding:3px 9px;border-radius:999px}
.badge.role{background:rgba(22,81,147,.08);color:var(--blue)}
.badge.cited{background:rgba(201,150,47,.15);color:#7d5f1c;text-transform:none;letter-spacing:.02em}
.badge.intl{background:rgba(156,35,80,.09);color:var(--wine);text-transform:none;letter-spacing:.02em}
.badge.doi{background:transparent;border:1px solid var(--line);color:var(--muted);text-decoration:none}
.badge.doi:hover{color:var(--blue);border-color:var(--blue)}
.badge.note{background:rgba(201,150,47,.15);color:#7d5f1c;text-transform:none;letter-spacing:0;font-weight:600}
.pub-featured{background:rgba(255,255,255,.45);border:1px solid var(--line);border-radius:14px;
  padding:18px 20px;margin-bottom:14px;box-shadow:0 18px 50px -34px rgba(35,25,22,.3)}
.pub-featured .pub{grid-template-columns:1fr;border-top:0;padding:0}

/* ── Courses (teaching) ─────────────────────────────────── */
.courses{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.course{background:rgba(255,255,255,.45);border:1px solid var(--line);border-radius:14px;padding:16px 18px;
  box-shadow:0 18px 50px -34px rgba(35,25,22,.3)}
.course-name{font-family:var(--sans);font-weight:600;font-size:15px;line-height:1.35;color:var(--ink);margin:0 0 4px}
.course-ja{font-weight:500;color:var(--muted)}
.course-meta{font-family:var(--sans);font-size:12.5px;color:var(--muted);margin:0}
@media(max-width:620px){.courses{grid-template-columns:1fr}}

/* ── Apps (project cards) ───────────────────────────────── */
.apps-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.app-card{display:flex;flex-direction:column;gap:10px;background:rgba(255,255,255,.45);
  border:1px solid var(--line);border-radius:14px;padding:22px 24px;text-decoration:none;color:inherit;
  box-shadow:0 18px 50px -34px rgba(35,25,22,.3);transition:transform .2s,box-shadow .2s,border-color .2s}
.app-card:hover{transform:translateY(-2px);border-color:var(--blue);box-shadow:0 26px 60px -34px rgba(35,25,22,.42)}
.app-title{font-family:var(--sans);font-weight:700;font-size:17px;line-height:1.3;color:var(--ink);margin:0}
.app-blurb{font-family:var(--sans);font-size:13.5px;line-height:1.6;color:var(--muted);margin:0;flex:1}
.app-tags{display:flex;flex-wrap:wrap;gap:6px}
.app-open{font-family:var(--sans);font-size:12.5px;font-weight:600;color:var(--blue);margin-top:2px}
.app-card:hover .app-open{text-decoration:underline}
@media(max-width:620px){.apps-grid{grid-template-columns:1fr}}

/* ── Two-column small lists (skills / languages) ────────── */
.cols{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,56px)}
.minilist{list-style:none;margin:0;padding:0}
.minilist li{padding:9px 0;border-top:1px solid var(--line);font-size:14px;display:flex;
  justify-content:space-between;gap:16px;align-items:baseline}
.minilist li:first-child{border-top:0}
.minilist .ml-k{font-family:var(--serif);color:var(--ink)}
.minilist .ml-v{font-family:var(--sans);font-size:12.5px;color:var(--muted);text-align:right;flex-shrink:0}
@media(max-width:620px){.cols{grid-template-columns:1fr;gap:8px}}

/* ── CTA / view-all ─────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:999px;text-decoration:none;
  font-family:var(--sans);font-weight:600;font-size:13px;letter-spacing:.02em;transition:background .25s,transform .25s}
.btn.primary{background:var(--ink);color:var(--paper)}
.btn.primary:hover{background:var(--blue);transform:translateY(-1px)}
.btn.ghost{background:rgba(255,255,255,.5);color:var(--blue);border:1px solid var(--line)}
.btn.ghost:hover{background:#fff;transform:translateY(-1px)}

/* ── Footer ─────────────────────────────────────────────── */
.footer{max-width:var(--max);margin:0 auto;padding:clamp(28px,4vw,44px) var(--g);border-top:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-family:var(--sans);font-size:13px;color:var(--muted)}
.footer a{color:var(--muted)}

/* Shown only when printing (full contact line with URLs) */
.print-only{display:none}

/* ── Print: clean PDF export ─────────────────────────────── */
@media print{
  @page{margin:14mm}
  html{font-size:10.5pt}
  body{background:#fff;color:#000;line-height:1.45}
  body:before{display:none}                 /* drop the dot-grid */
  .topbar,.menu-btn,.hero-links,.btn{display:none !important}
  a{color:#000;text-decoration:none}
  .hero{display:block;padding:0 0 12px;border-bottom:1px solid #bbb}
  .hero-photo{display:none}                  /* keep print text-first; photo often wastes a page */
  .hero-copy h1{font-size:22pt;margin:0 0 4px}
  .section{padding:14px 0;border-top:1px solid #ddd;max-width:none;scroll-margin-top:0}
  .section h2{font-size:14pt}
  .kicker{color:#000;margin-bottom:10px}
  .kicker:before{background:#000}
  .tl-date{color:#000}
  .tl-date:before{background:#000}
  .tl-item,.pub,.pub-featured,.stat,.course,.app-card{break-inside:avoid;page-break-inside:avoid}
  .pub-featured,.tl-item,.course,.app-card{box-shadow:none;border:1px solid #ddd;background:#fff}
  .badge.role,.badge.note{background:#f0f0f0 !important;color:#000 !important}
  .tag{background:#f3f3f3}
  .pub-title a:after{content:" [" attr(href) "]";font-size:8pt;color:#555;font-weight:400}
  .print-only{display:block;margin:6px 0 2px;font-size:9.5pt;color:#000;line-height:1.5}
  .print-only a{color:#000}
}