/* ============================================================
   Aarav Agrawal — Site Styles
   Palette + type system carried over from the identity guide.
   ============================================================ */

:root{
  --tennis-blue:#3B7EA1;
  --light-blue:#7CB5C6;
  --lego-yellow:#FFD700;
  --tennis-gold:#F5C518;
  --brick-red:#DA291C;
  --ink:#1A1A2E;
  --cream:#FFF3D6;
  --mist:#E8F4F8;

  --bg:#14141f;
  --bg-raised:#1c1c2b;
  --bg-card:#20202f;
  --text:#f4f1ea;
  --text-dim:#b7b6c4;
  --border:rgba(244,241,234,0.10);
  --border-strong:rgba(244,241,234,0.18);

  --font-head:'Space Grotesk', sans-serif;
  --font-body:'IBM Plex Sans', sans-serif;
  --font-mono:'IBM Plex Mono', monospace;

  --radius:14px;
  --max:1180px;
}

[data-theme="light"]{
  --bg:#FFF8EA;
  --bg-raised:#ffffff;
  --bg-card:#ffffff;
  --text:var(--ink);
  --text-dim:#4a4a5c;
  --border:rgba(26,26,46,0.10);
  --border-strong:rgba(26,26,46,0.18);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  transition:background .25s ease, color .25s ease;
}
img{max-width:100%;display:block;}
a{color:inherit;}
h1,h2,h3,h4{font-family:var(--font-head);margin:0 0 .5em;line-height:1.15;letter-spacing:-0.01em;}
p{margin:0 0 1em;color:var(--text-dim);}
.container{max-width:var(--max);margin:0 auto;padding:0 24px;}
.mono{font-family:var(--font-mono);}

/* ---------- Nav ---------- */
.site-nav{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.site-nav .container{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;
}
.brand{
  font-family:var(--font-head);font-weight:700;font-size:1.15rem;
  text-decoration:none;color:var(--text);display:flex;align-items:center;gap:8px;
}
.brand .stud{width:9px;height:9px;border-radius:50%;background:var(--lego-yellow);display:inline-block;}
.nav-links{display:flex;gap:4px;align-items:center;list-style:none;margin:0;padding:0;flex-wrap:wrap;}
.nav-links a{
  font-family:var(--font-mono);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;
  text-decoration:none;color:var(--text-dim);padding:8px 10px;border-radius:8px;
  transition:color .15s, background .15s;
}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--border);}
.theme-toggle{
  font-family:var(--font-mono);font-size:.75rem;border:1px solid var(--border-strong);
  background:transparent;color:var(--text);border-radius:20px;padding:6px 14px;cursor:pointer;
  white-space:nowrap;
}
.nav-toggle{display:none;background:none;border:0;color:var(--text);font-size:1.4rem;cursor:pointer;}

@media (max-width:920px){
  .nav-links{
    position:fixed;inset:64px 0 0 0;background:var(--bg);flex-direction:column;
    align-items:flex-start;padding:16px 24px;display:none;overflow-y:auto;
  }
  .nav-links.open{display:flex;}
  .nav-links a{width:100%;padding:14px 4px;font-size:.85rem;border-bottom:1px solid var(--border);}
  .nav-toggle{display:block;}
}

/* ---------- Hero ---------- */
.hero{padding:64px 0 56px;position:relative;overflow:hidden;}
.hero-eyebrow{
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--tennis-gold);margin-bottom:14px;display:inline-block;
}
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem);max-width:16ch;}
.hero .lede{font-size:1.15rem;max-width:60ch;color:var(--text-dim);}
.highlight{background:linear-gradient(120deg, var(--lego-yellow) 0%, var(--lego-yellow) 100%);
  background-repeat:no-repeat;background-size:100% 40%;background-position:0 88%;
  color:var(--ink);padding:0 .15em;border-radius:2px;}
[data-theme="light"] .highlight{color:var(--ink);}

/* ---------- Collage (home hero) ---------- */
.collage{
  display:grid;grid-template-columns:repeat(6,1fr);grid-auto-rows:110px;gap:8px;margin-top:36px;
  grid-auto-flow:dense;
}
.collage figure{margin:0;overflow:hidden;border-radius:10px;position:relative;background:var(--bg-card);}
.collage img,.collage video{width:100%;height:100%;object-fit:cover;display:block;}
.collage figure:nth-child(1){grid-column:span 2;grid-row:span 2;}
.collage figure:nth-child(4){grid-column:span 2;grid-row:span 2;}
.collage figure:nth-child(7){grid-column:span 2;grid-row:span 2;}
.collage figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:8px 10px;
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.03em;color:#fff;
  background:linear-gradient(to top, rgba(0,0,0,.65), transparent);opacity:0;transition:opacity .2s;
}
.collage figure:hover figcaption{opacity:1;}
@media (max-width:760px){
  .collage{grid-template-columns:repeat(3,1fr);grid-auto-rows:90px;}
  .collage figure:nth-child(1),.collage figure:nth-child(4),.collage figure:nth-child(7){grid-column:span 2;grid-row:span 2;}
}

/* ---------- Sections ---------- */
section{padding:64px 0;}
.section-label{
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--tennis-blue);margin-bottom:10px;display:block;
}
.section-title{font-size:clamp(1.6rem,3.2vw,2.3rem);max-width:24ch;}
.section-intro{max-width:64ch;font-size:1.05rem;}
.divider{
  height:2px;max-width:140px;margin:28px 0 0;
  background:repeating-linear-gradient(90deg, var(--tennis-blue) 0 10px, transparent 10px 16px);
}

/* ---------- Islands / card grid ---------- */
.grid{display:grid;gap:20px;}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
@media (max-width:900px){.grid-3{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.grid-3,.grid-2{grid-template-columns:1fr;}}

.card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  padding:26px;position:relative;transition:transform .18s ease, border-color .18s ease;
}
.card:hover{transform:translateY(-3px);border-color:var(--border-strong);}
.card::before{
  content:"";position:absolute;top:14px;right:14px;width:6px;height:6px;border-radius:50%;
  background:var(--lego-yellow);box-shadow:10px 0 var(--lego-yellow), 0 10px var(--lego-yellow), 10px 10px var(--lego-yellow);
  opacity:.5;
}
.card-tag{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.04em;text-transform:uppercase;color:var(--tennis-gold);}
.card h3{font-size:1.25rem;margin-top:8px;}
.card-link{
  display:inline-flex;align-items:center;gap:6px;margin-top:20px;text-decoration:none;
  font-family:var(--font-mono);font-size:.82rem;color:var(--tennis-blue);
}
.card-photo{border-radius:10px;overflow:hidden;margin:-26px -26px 18px;aspect-ratio:4/3;}
.card-photo img{width:100%;height:100%;object-fit:cover;}

/* ---------- Stats ---------- */
.stat-row{display:flex;gap:28px;flex-wrap:wrap;margin:18px 0;}
.stat{font-family:var(--font-mono);}
.stat-num{font-size:1.8rem;font-weight:600;color:var(--tennis-gold);display:block;}
.stat-label{font-size:.7rem;letter-spacing:.05em;text-transform:uppercase;color:var(--text-dim);}

/* ---------- Timeline ---------- */
.timeline{position:relative;margin-top:40px;padding-left:28px;border-left:2px solid var(--border-strong);}
.tl-item{position:relative;padding-bottom:52px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-34px;top:4px;width:14px;height:14px;border-radius:50%;
  background:var(--bg);border:3px solid var(--tennis-blue);
}
.tl-item.win::before{border-color:var(--tennis-gold);}
.tl-item.hard::before{border-color:var(--brick-red);}
.tl-year{font-family:var(--font-mono);font-size:.8rem;color:var(--tennis-gold);letter-spacing:.05em;}
.tl-item h3{font-size:1.3rem;margin:6px 0 10px;}
.tl-body{max-width:70ch;}
.tl-media{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px;margin-top:16px;max-width:640px;}
.tl-media img,.tl-media video{border-radius:8px;aspect-ratio:1/1;object-fit:cover;width:100%;}
.tl-callout{
  background:var(--bg-card);border:1px solid var(--border);border-radius:10px;padding:14px 18px;
  margin-top:14px;font-size:.92rem;
}
.tl-badge{
  display:inline-block;font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;
  letter-spacing:.05em;padding:3px 10px;border-radius:20px;margin-right:8px;margin-bottom:8px;
}
.tl-badge.award{background:rgba(245,197,24,.16);color:var(--tennis-gold);}
.tl-badge.setback{background:rgba(218,41,28,.14);color:var(--brick-red);}

/* ---------- Award cards (varied colors, room to expand) ---------- */
.award-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px;}
@media (max-width:760px){.award-grid{grid-template-columns:1fr;}}
.award-card{
  background:var(--bg-card);border:1px solid var(--border);border-left:4px solid var(--tennis-gold);
  border-radius:10px;padding:20px 22px;
}
.award-card .card-tag{display:block;margin-bottom:6px;}
.award-card h3{font-size:1.08rem;margin:0 0 8px;}
.award-card p{font-size:.92rem;margin:0;}
.award-card.c-gold{border-left-color:var(--tennis-gold);}
.award-card.c-blue{border-left-color:var(--tennis-blue);}
.award-card.c-red{border-left-color:var(--brick-red);}
.award-card.c-lightblue{border-left-color:var(--light-blue);}
.award-card.c-yellow{border-left-color:var(--lego-yellow);}
.award-card.c-gold .card-tag{color:var(--tennis-gold);}
.award-card.c-blue .card-tag{color:var(--tennis-blue);}
.award-card.c-red .card-tag{color:var(--brick-red);}
.award-card.c-lightblue .card-tag{color:var(--light-blue);}
.award-card.c-yellow .card-tag{color:var(--lego-yellow);}

/* ---------- Photo grid / gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:20px;}
.gallery img,.gallery video{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:8px;}
.gallery.wide img,.gallery.wide video{aspect-ratio:4/3;}
@media (max-width:760px){.gallery{grid-template-columns:repeat(2,1fr);}}

/* ---------- Research topic ---------- */
.research-topic{
  border-top:1px solid var(--border);padding:48px 0;
}
.research-topic:first-of-type{border-top:none;}
.topic-head{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;flex-wrap:wrap;}
.topic-num{font-family:var(--font-mono);font-size:.85rem;color:var(--tennis-blue);}
.link-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px;}
.pill-link{
  font-family:var(--font-mono);font-size:.8rem;text-decoration:none;color:var(--text);
  border:1px solid var(--border-strong);padding:8px 14px;border-radius:20px;display:inline-flex;gap:6px;align-items:center;
  transition:background .15s;
}
.pill-link:hover{background:var(--border);}
.pending{
  border:1px dashed var(--border-strong);border-radius:10px;padding:16px 18px;font-size:.88rem;
  color:var(--text-dim);font-style:italic;
}
.video-frame{position:relative;border-radius:12px;overflow:hidden;aspect-ratio:16/9;background:#000;margin-top:20px;max-width:720px;}
.video-frame iframe{width:100%;height:100%;border:0;}

/* ---------- Quote / callout ---------- */
.callout{
  border-left:3px solid var(--tennis-gold);padding:4px 0 4px 22px;margin:28px 0;
  font-family:var(--font-head);font-size:1.15rem;color:var(--text);max-width:60ch;
}

/* ---------- Footer ---------- */
footer{padding:48px 0 40px;border-top:1px solid var(--border);margin-top:40px;}
.footer-row{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;}
.footer-links{display:flex;gap:18px;flex-wrap:wrap;list-style:none;padding:0;margin:0;}
.footer-links a{font-family:var(--font-mono);font-size:.8rem;text-decoration:none;color:var(--text-dim);}
.footer-links a:hover{color:var(--text);}
.footer-name{font-family:var(--font-head);font-weight:600;}
.footer-tag{color:var(--text-dim);font-size:.85rem;}

/* ---------- Utility ---------- */
.mt-0{margin-top:0;}
.center{text-align:center;}
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease, transform .5s ease;}
.reveal.in{opacity:1;transform:none;}
.court-line{width:100%;height:1px;background:var(--border-strong);position:relative;margin:56px 0;}
.court-line::before{
  content:"";position:absolute;left:50%;top:-9px;transform:translateX(-50%);
  width:2px;height:18px;background:var(--tennis-gold);
}
.back-link{font-family:var(--font-mono);font-size:.82rem;color:var(--tennis-blue);text-decoration:none;display:inline-block;margin-bottom:18px;}