/* ==========================================================================
   joshuatraut.com — Design System
   Shared across index.html, research.html, cv.html
   ========================================================================== */

/* --------------------------------------------------------------------------
   Custom Properties
   -------------------------------------------------------------------------- */
:root {
  --bg:#FFFFFF; --bg-alt:#F5F5F7; --bg-card:#FFFFFF;
  --text:#1D1D1F; --text-2:#6E6E73; --text-3:#86868B; --text-4:#AEAEB2;
  --teal:#0F766E; --teal-l:#14B8A6; --amber:#D97706; --amber-l:#F59E0B;
  --violet:#7C3AED; --violet-l:#8B5CF6;
  --border:rgba(0,0,0,0.08); --border-2:rgba(0,0,0,0.12);
  --shadow-sm:0 1px 2px rgba(0,0,0,0.04);
  --shadow:0 1px 3px rgba(0,0,0,0.06),0 8px 24px rgba(0,0,0,0.04);
  --shadow-lg:0 4px 12px rgba(0,0,0,0.08),0 24px 48px rgba(0,0,0,0.06);
  --sans:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  --mono:'JetBrains Mono','SF Mono',monospace;
  --ease:cubic-bezier(.25,.46,.45,.94); --ease-out:cubic-bezier(.16,1,.3,1);
  --wide:1080px; --prose:680px; --radius:12px; --radius-lg:16px;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--sans);color:var(--text);background:var(--bg);line-height:1.6;overflow-x:hidden;font-feature-settings:'cv11' 1,'ss01' 1}
::selection{background:rgba(15,118,110,.15)}
a{color:var(--teal);text-decoration:none}

/* --------------------------------------------------------------------------
   Progress Bar
   -------------------------------------------------------------------------- */
.progress{position:fixed;top:0;left:0;height:2px;z-index:400;background:linear-gradient(90deg,var(--teal),var(--teal-l))}

/* --------------------------------------------------------------------------
   Reveal Animation
   -------------------------------------------------------------------------- */
.rv{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out)}
.rv.vis{opacity:1;transform:none}

/* --------------------------------------------------------------------------
   Hero Entry Animation
   -------------------------------------------------------------------------- */
@keyframes heroIn{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
.hi{opacity:0;animation:heroIn .8s var(--ease-out) forwards}
.hi-1{animation-delay:.1s}.hi-2{animation-delay:.2s}.hi-3{animation-delay:.3s}.hi-4{animation-delay:.4s}.hi-5{animation-delay:.5s}.hi-6{animation-delay:.6s}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:300;height:48px;padding:0 32px;display:flex;align-items:center;justify-content:space-between;transition:background .3s,box-shadow .3s,backdrop-filter .3s}
.nav.scrolled{background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);box-shadow:0 1px 0 var(--border)}
.nav-logo{font-size:.85rem;font-weight:600;color:var(--text);text-decoration:none}
.nav-links{display:flex;gap:24px;list-style:none;align-items:center}
.nav-links a{color:var(--text-3);font-size:.78rem;font-weight:500;transition:color .2s;text-decoration:none}
.nav-links a:hover{color:var(--text)}

/* Hamburger (mobile only) */
.nav-hamburger{display:none;background:none;border:none;cursor:pointer;padding:4px;color:var(--text)}
.nav-hamburger svg{width:22px;height:22px}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
.sec{padding:96px 40px}
.sec-w{max-width:var(--wide);margin:0 auto}
.sec-n{max-width:var(--prose);margin:0 auto}
.sec-alt{background:var(--bg-alt)}
.sec-tag{font-family:var(--mono);font-size:.7rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--teal);margin-bottom:12px}
.sec-h{font-size:clamp(1.7rem,3.5vw,2.5rem);font-weight:700;letter-spacing:-.035em;line-height:1.12;margin-bottom:12px}
.sec-p{font-size:.95rem;color:var(--text-2);line-height:1.6;max-width:500px}
.scope-text{background:linear-gradient(135deg,#134E4A,#0F766E 50%,#0D9488);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* --------------------------------------------------------------------------
   Hero — Base
   -------------------------------------------------------------------------- */
.hero{min-height:88vh;display:flex;flex-direction:column;justify-content:center;padding:100px 40px 60px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-20%;right:-15%;width:500px;height:500px;background:radial-gradient(circle,rgba(15,118,110,.04) 0%,transparent 70%);pointer-events:none}
.hero-inner{max-width:var(--wide);margin:0 auto;position:relative;z-index:1}

/* Hero — Split Layout (landing page) */
.hero-split{display:flex;align-items:center;gap:64px}
.hero-text{flex:1}
.hero-photo{flex-shrink:0;width:280px;height:280px;border-radius:50%;object-fit:cover;object-position:center 15%;box-shadow:var(--shadow-lg);border:4px solid var(--bg)}

/* Hero — Sub-elements */
.hero-pill{display:inline-flex;align-items:center;gap:6px;font-size:.7rem;font-weight:600;letter-spacing:.03em;text-transform:uppercase;color:var(--teal);padding:5px 14px;background:rgba(15,118,110,.06);border:1px solid rgba(15,118,110,.12);border-radius:100px;margin-bottom:24px}
.hero-title{font-size:clamp(2.4rem,6vw,3.2rem);font-weight:800;letter-spacing:-.04em;line-height:1.05;margin-bottom:18px}
.hero-desc{font-size:1.05rem;color:var(--text-2);line-height:1.6;max-width:500px;margin-bottom:16px}
.hero-subtitle{font-size:.95rem;color:var(--text-2);margin-bottom:24px}
.hero-meta{display:flex;flex-wrap:wrap;gap:6px 20px;font-size:.82rem;color:var(--text-3);padding-bottom:32px;border-bottom:1px solid var(--border);margin-bottom:32px}
.hero-meta strong{color:var(--text);font-weight:600}
.hero-dot{width:3px;height:3px;border-radius:50%;background:var(--text-4);align-self:center}

/* --------------------------------------------------------------------------
   Stats Grid
   -------------------------------------------------------------------------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.stat{background:var(--bg);padding:22px 18px}
.stat-val{font-family:var(--mono);font-size:clamp(1.6rem,2.8vw,2.2rem);font-weight:700;letter-spacing:-.03em;line-height:1;color:var(--text)}
.stat-label{font-size:.72rem;color:var(--text-3);margin-top:4px}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn{display:inline-flex;align-items:center;gap:7px;font-family:var(--sans);font-size:.84rem;font-weight:550;padding:10px 22px;border-radius:100px;border:none;cursor:pointer;transition:all .2s var(--ease);text-decoration:none}
.btn svg{width:15px;height:15px}
.btn-primary{background:var(--text);color:#fff}.btn-primary:hover{background:#000;box-shadow:var(--shadow)}
.btn-ghost{background:transparent;color:var(--text-2);border:1px solid var(--border-2)}.btn-ghost:hover{background:var(--bg-alt);color:var(--text)}

/* --------------------------------------------------------------------------
   Toggle Buttons
   -------------------------------------------------------------------------- */
.toggles{display:flex;gap:4px;flex-wrap:wrap}
.tog{font-family:var(--sans);font-size:.72rem;font-weight:550;padding:5px 13px;border-radius:100px;border:1px solid var(--border);background:transparent;color:var(--text-3);cursor:pointer;transition:all .2s}
.tog:hover{border-color:var(--border-2);color:var(--text-2)}.tog.on{background:var(--text);color:#fff;border-color:var(--text)}

/* --------------------------------------------------------------------------
   Profile Links (landing hero)
   -------------------------------------------------------------------------- */
.profile-links{display:flex;gap:20px;flex-wrap:wrap;margin-bottom:28px}
.profile-link{display:inline-flex;align-items:center;gap:6px;font-size:.88rem;font-weight:500;color:var(--text-3);transition:color .2s;text-decoration:none}
.profile-link:hover{color:var(--teal)}
.profile-link svg{width:16px;height:16px}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer{max-width:var(--wide);margin:0 auto;padding:36px 40px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-t{font-size:.76rem;color:var(--text-4)}
.footer-l{display:flex;gap:20px;list-style:none}
.footer-l a{font-size:.76rem;color:var(--text-3);text-decoration:none}
.footer-l a:hover{color:var(--teal)}

/* --------------------------------------------------------------------------
   Toast
   -------------------------------------------------------------------------- */
.toast-w{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:500;pointer-events:none}
.toast{background:var(--text);color:#fff;font-size:.8rem;font-weight:550;padding:10px 20px;border-radius:100px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:6px;transform:translateY(12px);opacity:0;transition:all .3s var(--ease-out)}
.toast.vis{transform:translateY(0);opacity:1}

/* --------------------------------------------------------------------------
   Research Card Component
   -------------------------------------------------------------------------- */
.research-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:32px}
.research-grid>.rv{display:flex;flex-direction:column}
.research-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px 24px;cursor:pointer;transition:all .3s var(--ease-out),opacity .3s,transform .3s;text-decoration:none;display:block;color:inherit;position:relative;flex:1}
.research-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px);border-left:3px solid var(--teal)}
.research-card.hiding{opacity:0;transform:scale(.96)}
.research-card-status{display:inline-flex;padding:4px 12px;border-radius:100px;font-family:var(--mono);font-size:.65rem;font-weight:600;text-transform:uppercase;letter-spacing:.03em;margin-bottom:14px}
.research-card-title{font-size:1.15rem;font-weight:650;line-height:1.3;margin-bottom:6px;color:var(--text)}
.research-card-authors{font-size:.82rem;color:var(--text-3);margin-bottom:10px}
.research-card-journal{font-family:var(--mono);font-size:.72rem;color:var(--text-4);margin-bottom:12px}
.research-card-tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.research-card-tag{padding:2px 8px;border-radius:6px;background:var(--bg-alt);font-size:.7rem;font-weight:500;color:var(--text-3)}
.research-card-finding{font-size:.88rem;color:var(--text-2);line-height:1.5}
.research-card-award{display:inline-flex;align-items:center;gap:4px;font-size:.7rem;font-weight:600;color:var(--amber);margin-bottom:10px}

/* --------------------------------------------------------------------------
   Expertise Card Grid
   -------------------------------------------------------------------------- */
.expertise-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:32px}
.expertise-grid>.rv{display:flex;flex-direction:column}
.expertise-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px 24px;transition:all .3s var(--ease-out);border-top:3px solid transparent;flex:1}
.expertise-card:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-top-color:var(--teal)}
.expertise-icon{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:rgba(15,118,110,.06);border-radius:var(--radius);margin-bottom:16px;color:var(--teal)}
.expertise-icon svg{width:22px;height:22px}
.expertise-title{font-size:1rem;font-weight:650;margin-bottom:8px}
.expertise-desc{font-size:.84rem;color:var(--text-2);line-height:1.55}

/* --------------------------------------------------------------------------
   Filter Bar (research index)
   -------------------------------------------------------------------------- */
.filter-bar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--border)}
.filter-search{flex:0 0 auto;position:relative}
.filter-search input{font-family:var(--sans);font-size:.84rem;padding:8px 16px 8px 36px;border:1px solid var(--border-2);border-radius:var(--radius);background:var(--bg);color:var(--text);outline:none;transition:border-color .2s,box-shadow .2s;width:220px}
.filter-search input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(15,118,110,.08)}
.filter-search input::placeholder{color:var(--text-4)}
.filter-search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:14px;height:14px;color:var(--text-4)}
.filter-sort{margin-left:auto}
.filter-sort select{font-family:var(--sans);font-size:.76rem;padding:6px 12px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text-2);cursor:pointer;outline:none}
.empty-state{text-align:center;padding:80px 20px;color:var(--text-3);font-size:.95rem}

/* --------------------------------------------------------------------------
   CV Page — Timeline
   -------------------------------------------------------------------------- */
.cv-timeline{position:relative;padding-left:32px;margin-top:32px;display:flex;flex-direction:column;gap:18px}
.cv-timeline::before{content:'';position:absolute;left:7px;top:0;bottom:0;width:1.5px;background:var(--border)}
.cv-entry{position:relative}
.cv-entry::before{content:'';position:absolute;left:-25px;top:6px;width:10px;height:10px;border-radius:50%;border:2px solid var(--teal);background:var(--bg);z-index:1}
.cv-entry-header{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:8px;margin-bottom:4px}
.cv-entry-org{font-size:1rem;font-weight:650;color:var(--text)}
.cv-entry-loc{font-size:.82rem;color:var(--text-3)}
.cv-entry-role{font-size:.88rem;color:var(--text-2);margin-bottom:2px}
.cv-entry-date{font-family:var(--mono);font-size:.72rem;color:var(--text-4);font-weight:500}
.cv-sub-role{padding-top:12px;margin-top:12px;border-top:1px solid var(--border)}
.cv-sub-role:first-of-type{border-top:none;margin-top:8px;padding-top:0}
.cv-entry-details{margin-top:8px;padding-left:0;list-style:none}
.cv-entry-details li{font-size:.84rem;color:var(--text-2);line-height:1.6;padding-left:16px;position:relative;margin-bottom:4px}
.cv-entry-details li::before{content:'·';position:absolute;left:0;color:var(--teal);font-weight:700}

/* CV Page — Skills */
.cv-skills{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:24px}
.cv-skill-group h4{font-size:.82rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--teal);font-family:var(--mono);margin-bottom:8px}
.cv-skill-group p{font-size:.88rem;color:var(--text-2);line-height:1.6}

/* CV Page — Service & Skills grids (overridable by media queries) */
.cv-service-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:32px}
.cv-skills-3col{display:grid;grid-template-columns:1fr 1fr 1fr;gap:48px;margin-top:24px}

/* CV Page — Publications Mini-cards */
.cv-pub{padding:16px 0;border-bottom:1px solid var(--border)}
.cv-pub:last-child{border-bottom:none}
.cv-pub-title{font-size:.92rem;font-weight:600;margin-bottom:4px}
.cv-pub-meta{font-size:.78rem;color:var(--text-3);line-height:1.5}
.cv-pub-award{font-size:.72rem;font-weight:600;color:var(--amber);margin-top:4px}

/* CV Page — Award Cards */
.award-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px}
.award-card{padding:20px;border:1px solid var(--border);border-radius:var(--radius);transition:box-shadow .3s,transform .3s,border-color .3s}
.award-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px);border-left:3px solid var(--teal)}
.award-year{font-family:var(--mono);font-size:.68rem;font-weight:600;color:var(--teal);margin-bottom:6px}
.award-title{font-size:.88rem;font-weight:600;margin-bottom:4px}
.award-desc{font-size:.8rem;color:var(--text-2);line-height:1.5}

/* --------------------------------------------------------------------------
   Language Toggle
   -------------------------------------------------------------------------- */
.lang-toggle{display:flex;border:1px solid var(--border);border-radius:100px;overflow:hidden;font-size:.68rem;font-weight:550}
.lang-btn{padding:3px 10px;background:transparent;border:none;color:var(--text-3);cursor:pointer;transition:all .2s;font-family:var(--sans)}
.lang-btn.on{background:var(--text);color:#fff}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:24px}
.contact-item{display:flex;gap:12px;align-items:flex-start}
.contact-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:rgba(15,118,110,.06);border-radius:var(--radius);flex-shrink:0;color:var(--teal)}
.contact-icon svg{width:18px;height:18px}
.contact-label{font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-3);font-family:var(--mono);margin-bottom:2px}
.contact-value{font-size:.88rem;color:var(--text)}
.contact-value a{color:var(--teal)}

/* --------------------------------------------------------------------------
   Responsive — 860px
   -------------------------------------------------------------------------- */
@media(max-width:860px){
  .hero-split{flex-direction:column-reverse;gap:32px;text-align:center}
  .hero-photo{width:200px;height:200px}
  .hero-desc,.sec-p{max-width:100%}
  .profile-links{justify-content:center}
  .expertise-grid{grid-template-columns:repeat(2,1fr)}
  .research-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .cv-skills{grid-template-columns:1fr}
  .award-grid{grid-template-columns:1fr}
  .cv-entry-header{flex-direction:column;gap:2px}
  .sec{padding:64px 24px}
  .nav{padding:0 20px}
  .footer{padding:28px 24px}
  .hero{padding:80px 24px 48px}
}

/* --------------------------------------------------------------------------
   Responsive — 480px
   -------------------------------------------------------------------------- */
@media(max-width:480px){
  .nav-hamburger{display:block}
  .nav-links{display:none;position:absolute;top:48px;left:0;right:0;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);box-shadow:0 4px 12px rgba(0,0,0,.06);flex-direction:column;gap:0;padding:8px 0}
  .nav-links.open{display:flex}
  .nav-links li{padding:0}
  .nav-links a{display:block;padding:12px 24px;font-size:.88rem}
  .nav-links a:hover{background:var(--bg-alt)}
  .nav-links .lang-toggle{margin:8px 24px 12px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .hero-title{font-size:clamp(1.8rem,5vw,2.4rem)}
  .expertise-grid{grid-template-columns:1fr}
  .hero-photo{width:170px;height:170px}
  .filter-bar{flex-direction:column;align-items:stretch}
  .filter-search input{width:100%}
  .filter-sort{margin-left:0}
  .cv-service-grid{grid-template-columns:1fr}
  .cv-skills-3col{grid-template-columns:1fr}
}

/* --------------------------------------------------------------------------
   Reduced Motion
   -------------------------------------------------------------------------- */
@media(prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
  .hi{opacity:1;animation:none;transform:none}
  .progress{display:none}
}