/* =========================================================
   Dr. Bhavneet Kaur — Academic Profile
   Light academic theme: white base, soft blue, light pink, subtle green
   Fonts: Cormorant Garamond (serif headings) + Source Sans 3 (body)
   ========================================================= */

:root{
  --color-bg: #ffffff;
  --color-surface: #fafaf7;
  --color-surface-2: #f4f6fa;
  --color-ink: #1c2330;
  --color-ink-soft: #4a5366;
  --color-muted: #6b7385;
  --color-line: #e5e7ee;

  --color-blue: #2f5d8a;        /* primary accent */
  --color-blue-soft: #e8f0f8;
  --color-pink: #c9748a;         /* warm accent */
  --color-pink-soft: #fbeef1;
  --color-green: #5a8a6b;        /* subtle accent */
  --color-green-soft: #eaf3ec;

  --serif: "Cormorant Garamond", "Georgia", "Times New Roman", serif;
  --sans: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

  --maxw: 1120px;
  --radius: 4px;
  --shadow: 0 1px 2px rgba(28,35,48,.04), 0 4px 16px rgba(28,35,48,.05);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; height:auto; display:block; }
a{ color: var(--color-blue); text-decoration: none; }
a:hover{ text-decoration: underline; }

h1,h2,h3,h4{
  font-family: var(--serif);
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -.005em;
  line-height: 1.2;
  margin: 0 0 .5em;
}
h1{ font-size: clamp(2.2rem, 4.2vw, 3.4rem); }
h2{ font-size: clamp(1.7rem, 3vw, 2.3rem); }
h3{ font-size: 1.2rem; font-weight: 600; }

p{ margin: 0 0 1em; color: var(--color-ink-soft); }

.container{ max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }

/* ---------- Header / Nav ---------- */
.site-header{
  position: sticky; top:0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--color-line);
}
.nav{
  display:flex; align-items:center; justify-content: space-between;
  padding: .9rem 1.25rem;
}
.brand{ display:flex; flex-direction:column; line-height:1.15; color: var(--color-ink); }
.brand:hover{ text-decoration:none; }
.brand-name{ font-family: var(--serif); font-size: 1.25rem; font-weight: 600; }
.brand-sub{ font-size: .78rem; color: var(--color-muted); letter-spacing: .04em; text-transform: uppercase; }

.nav-list{
  display:flex; gap: 1.4rem; list-style:none; margin:0; padding:0;
}
.nav-list a{
  color: var(--color-ink-soft);
  font-size: .95rem;
  font-weight: 500;
  padding: .25rem 0;
  border-bottom: 2px solid transparent;
}
.nav-list a:hover, .nav-list a[aria-current="page"]{
  color: var(--color-blue);
  border-bottom-color: var(--color-blue);
  text-decoration:none;
}
.nav-toggle{
  display:none;
  background: transparent;
  border: 1px solid var(--color-line);
  padding: .4rem .7rem;
  border-radius: var(--radius);
  font: inherit;
  color: var(--color-ink);
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero{ position: relative; padding: 4rem 0 3rem; overflow: hidden; }
.hero-bg{
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.85)), url('/images/library-bg.jpg') center/cover no-repeat;
  opacity: .55;
  z-index: 0;
}
.hero-inner{
  position: relative; z-index: 1;
  display:grid; grid-template-columns: 1.4fr 1fr; gap: 3rem; align-items:center;
}
.eyebrow{
  font-size: .78rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--color-blue); font-weight: 600; margin: 0 0 .6rem;
}
.hero-text .title{
  font-family: var(--serif);
  font-size: 1.4rem;
  color: var(--color-ink);
  margin: -.2rem 0 .75rem;
}
.hero-text .tagline{
  font-size: 1.05rem;
  color: var(--color-ink-soft);
  max-width: 38rem;
}
.hero-cta{ display:flex; gap: .75rem; margin-top: 1.4rem; flex-wrap: wrap; }
.hero-portrait img{
  width: 100%;
  max-width: 360px;
  margin-left: auto;
  border-radius: 6px;
  box-shadow: var(--shadow);
  border: 6px solid #fff;
  outline: 1px solid var(--color-line);
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-block;
  padding: .7rem 1.2rem;
  border-radius: var(--radius);
  font: 500 .95rem var(--sans);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .15s ease;
  text-decoration: none;
}
.btn-primary{ background: var(--color-blue); color: #fff; }
.btn-primary:hover{ background: #244a6f; text-decoration: none; }
.btn-ghost{ background: transparent; color: var(--color-blue); border-color: var(--color-blue); }
.btn-ghost:hover{ background: var(--color-blue-soft); text-decoration:none; }

/* ---------- Sections ---------- */
.section{ padding: 4.5rem 0; border-top: 1px solid var(--color-line); }
.section-alt{ background: var(--color-surface); }
.section-head{ max-width: 48rem; margin: 0 auto 2.5rem; text-align: center; }
.section-head .lede{ font-size: 1.05rem; color: var(--color-ink-soft); }
.center{ text-align:center; }
.mt{ margin-top: 1rem; }
.mt-lg{ margin-top: 2rem; }
.muted{ color: var(--color-muted); }
.small{ font-size: .88rem; }

/* ---------- Grids ---------- */
.grid-2{ display:grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
.grid-3{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.prose p{ font-size: 1.02rem; }

/* ---------- Cards ---------- */
.card{
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem;
  box-shadow: var(--shadow);
}
.card h3{ margin-top: 0; color: var(--color-blue); }
.facts{ list-style:none; padding:0; margin: 0 0 1rem; border-top: 1px solid var(--color-line); }
.facts li{
  display:flex; justify-content: space-between;
  padding: .55rem 0;
  border-bottom: 1px solid var(--color-line);
  font-size: .95rem;
}
.facts span{ color: var(--color-muted); }
.facts strong{ color: var(--color-ink); }
.bullets{ margin: 0; padding-left: 1.1rem; }
.bullets li{ margin-bottom: .35rem; color: var(--color-ink-soft); }

.chips{ display:flex; flex-wrap:wrap; gap:.4rem; }
.chips span{
  background: var(--color-blue-soft);
  color: var(--color-blue);
  padding: .25rem .65rem;
  border-radius: 999px;
  font-size: .82rem;
}

/* ---------- Timeline ---------- */
.timeline{
  list-style:none;
  margin: 0; padding: 0;
  position: relative;
  border-left: 2px solid var(--color-line);
  margin-left: .5rem;
}
.timeline > li{
  position: relative;
  padding: .25rem 0 1.75rem 1.75rem;
}
.timeline > li::before{
  content:"";
  position:absolute; left: -7px; top: .55rem;
  width: 12px; height: 12px;
  background: var(--color-blue);
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px var(--color-blue);
}
.t-period{
  font-size: .82rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-blue);
  font-weight: 600;
  margin-bottom: .25rem;
}
.t-body h3{ margin: 0 0 .35rem; }
.t-body ul{ margin: .4rem 0 0; padding-left: 1.1rem; }
.t-body ul li{ margin-bottom: .25rem; color: var(--color-ink-soft); }

/* ---------- Research highlights ---------- */
.pub-highlights{
  display:grid; grid-template-columns: 1fr 1fr; gap: 1.5rem;
}
.pub-card{
  background: #fff;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-blue);
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.pub-card:nth-child(2){ border-left-color: var(--color-pink); }
.pub-year{
  font-family: var(--serif);
  font-size: .95rem; color: var(--color-muted);
  margin: 0 0 .35rem;
}
.pub-card h3{ font-size: 1.15rem; margin: 0 0 .6rem; }
.pub-meta{ font-size: .92rem; margin: 0 0 .25rem; color: var(--color-ink-soft); }
.pub-vol{ font-size: .85rem; color: var(--color-muted); margin: 0; }

.tag{
  display:inline-block;
  padding: .1rem .55rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  margin-left: .25rem;
}
.tag-blue{ background: var(--color-blue-soft); color: var(--color-blue); }
.tag-pink{ background: var(--color-pink-soft); color: var(--color-pink); }
.tag-green{ background: var(--color-green-soft); color: var(--color-green); }

/* ---------- Contact form ---------- */
.contact-form{
  background:#fff;
  padding: 1.5rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.contact-form h3{ margin-top: 0; color: var(--color-blue); }
.contact-form label{
  display:block;
  font-size: .9rem;
  color: var(--color-ink-soft);
  margin-bottom: .85rem;
}
.contact-form input,
.contact-form textarea{
  display:block;
  width: 100%;
  margin-top: .3rem;
  padding: .55rem .7rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font: inherit;
  color: var(--color-ink);
  background: #fff;
}
.contact-form input:focus,
.contact-form textarea:focus{
  outline: none;
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px var(--color-blue-soft);
}
.form-status{ margin: .6rem 0 0; font-size: .9rem; color: var(--color-green); }

/* ---------- Publications page ---------- */
.pub-page{ padding-top: 3rem; }
.pub-toolbar{
  display:flex; gap: .75rem; flex-wrap: wrap;
  margin: 1rem auto 0;
  max-width: 720px;
}
.pub-toolbar input,
.pub-toolbar select{
  flex: 1;
  min-width: 200px;
  padding: .6rem .8rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font: inherit;
  background:#fff;
}
.pub-toolbar input:focus,
.pub-toolbar select:focus{
  outline: none;
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px var(--color-blue-soft);
}
.pub-list{
  list-style:none; padding: 0; margin: 1.5rem 0 0;
  max-width: 880px; margin-left:auto; margin-right:auto;
}
.pub-list > li{
  background:#fff;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-blue);
  padding: 1.15rem 1.3rem;
  border-radius: var(--radius);
  margin-bottom: .9rem;
  box-shadow: var(--shadow);
}
.pub-list .pub-title{
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-ink);
  margin: 0 0 .35rem;
}
.pub-list .pub-info{
  color: var(--color-ink-soft);
  font-size: .94rem;
  margin: 0 0 .35rem;
}
.pub-list .pub-foot{
  display:flex; align-items:center; justify-content: space-between; flex-wrap:wrap; gap:.5rem;
  margin-top: .4rem;
}
.pub-list .pub-foot .pub-y{
  font-size: .85rem; color: var(--color-muted);
}
.pub-list .pub-link{ font-size: .9rem; }
.pub-empty, .pub-loading{
  text-align:center; color: var(--color-muted);
  padding: 2rem; background: var(--color-surface); border-radius: var(--radius);
}

/* ---------- Footer ---------- */
.site-footer{
  border-top: 1px solid var(--color-line);
  background: var(--color-surface);
  padding: 1.5rem 0;
  margin-top: 2rem;
}
.foot{ display:flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: .5rem; }
.foot p{ margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 860px){
  .hero{ padding: 2.5rem 0; }
  .hero-inner{ grid-template-columns: 1fr; gap: 1.75rem; }
  .hero-portrait{ order: -1; }
  .hero-portrait img{ margin: 0 auto; max-width: 180px; }
  .grid-2{ grid-template-columns: 1fr; gap: 1.75rem; }
  .grid-3{ grid-template-columns: 1fr; }
  .pub-highlights{ grid-template-columns: 1fr; }
  .section{ padding: 3rem 0; }

  .nav-toggle{ display:inline-block; }
  .nav-list{
    display:none;
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column;
    background: #fff;
    border-bottom: 1px solid var(--color-line);
    padding: 1rem 1.25rem;
    gap: .25rem;
  }
  .nav-list.open{ display:flex; }
  .nav-list a{ padding: .5rem 0; }
  .site-header .nav{ position: relative; }
}