/* ============================================================
   style.css — Minimalist Academic Theme
   Vijay John — Lawrence Technological University
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700&family=Noto+Serif:ital,wght@0,400;0,700;1,400&display=swap');

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --navy:      #1a2540;
  --navy-mid:  #253356;
  --accent:    #2a4a8a;
  --rule:      #b8bfcf;
  --bg:        #f8f7f4;
  --surface:   #ffffff;
  --text:      #1e1e1e;
  --muted:     #55606f;
  --gold:      #8a6b28;
  --font-body: 'Noto Sans JP', 'Helvetica Neue', Arial, sans-serif;
  --font-head: 'Noto Serif', Georgia, 'Times New Roman', serif;
  --max-w:     960px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-weight: 400;
}

nav {
  background: var(--navy);
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; flex-wrap: wrap;
  padding: 0 2rem;
  border-bottom: 2px solid var(--accent);
}

nav .brand {
  font-family: var(--font-head);
  font-size: 1rem; font-weight: 700;
  color: #ffffff;
  padding: 0.85rem 2rem 0.85rem 0;
  letter-spacing: 0.03em;
  text-decoration: none;
}

nav a {
  color: #b8c2d4;
  text-decoration: none;
  padding: 0.85rem 0.8rem;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  transition: color 0.2s;
  border-bottom: 2px solid transparent;
}

nav a:hover,
nav a.active { color: #ffffff; border-bottom-color: #ffffff; }

.hero {
  background: var(--navy);
  color: #ffffff;
  padding: 4rem 2rem 3rem;
  display: flex; align-items: flex-start; gap: 2.8rem; flex-wrap: wrap;
  border-bottom: 1px solid var(--navy-mid);
}

.hero img {
  width: 150px; height: 150px;
  border-radius: 50%;
  border: 2px solid var(--rule);
  object-fit: cover; flex-shrink: 0;
}

.hero-text h1 {
  font-family: var(--font-head);
  font-size: 2rem; font-weight: 700;
  letter-spacing: 0.01em;
  margin-bottom: 0.2rem;
}

.hero-text .title {
  font-size: 0.83rem; color: #9aaac0;
  font-weight: 400; letter-spacing: 0.09em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.hero-text p {
  font-size: 0.9rem; max-width: 560px;
  color: #bcc6d8; line-height: 1.8;
}

.hero-links { margin-top: 1.1rem; display: flex; gap: 0.65rem; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 0.42rem 1.1rem;
  font-size: 0.77rem; font-weight: 600;
  letter-spacing: 0.07em; text-transform: uppercase;
  text-decoration: none;
  transition: opacity 0.2s;
}

.btn-primary  { background: var(--accent); color: #fff; }
.btn-outline  { border: 1.5px solid #9aaac0; color: #9aaac0; }
.btn:hover    { opacity: 0.78; }

.section {
  padding: 3rem 2rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.section h2 {
  font-family: var(--font-head);
  font-size: 1.35rem; font-weight: 700;
  color: var(--navy);
  margin-bottom: 1.5rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--rule);
}

.section h3 {
  font-family: var(--font-head);
  font-size: 1rem; font-weight: 700;
  color: var(--navy);
  margin: 1.3rem 0 0.35rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.1rem;
}

.card {
  background: var(--surface);
  border: 1px solid #dde2ec;
  border-left: 3px solid var(--accent);
  padding: 1.3rem 1.2rem;
  transition: box-shadow 0.2s;
}

.card:hover { box-shadow: 0 3px 14px rgba(26,37,64,0.09); }

.card h3 {
  font-family: var(--font-head);
  color: var(--navy); font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.card .meta {
  font-size: 0.72rem; color: var(--accent);
  font-weight: 600; letter-spacing: 0.07em;
  text-transform: uppercase; margin-bottom: 0.45rem;
}

.card p, .card ul { font-size: 0.86rem; color: var(--muted); line-height: 1.7; }
.card ul { padding-left: 1.1rem; }
.card ul li { margin-bottom: 0.28rem; }

.tag {
  display: inline-block;
  background: #edf0f7;
  color: var(--accent);
  font-size: 0.68rem; font-weight: 600;
  padding: 0.15rem 0.55rem;
  margin: 0.18rem 0.12rem 0 0;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.timeline { position: relative; padding-left: 1.9rem; }

.timeline::before {
  content: '';
  position: absolute; left: 0.45rem; top: 0.5rem; bottom: 0;
  width: 1px; background: var(--rule);
}

.tl-item { position: relative; margin-bottom: 1.6rem; }

.tl-item::before {
  content: '';
  position: absolute; left: -1.57rem; top: 0.48rem;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--accent);
}

.tl-item h3 {
  font-family: var(--font-head);
  font-size: 0.96rem; color: var(--navy); margin: 0;
}

.tl-item .tl-meta {
  font-size: 0.74rem; color: var(--muted);
  font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; margin: 0.18rem 0 0.4rem;
}

.tl-item p { font-size: 0.86rem; color: var(--muted); line-height: 1.7; }

.pub-list { list-style: none; }

.pub-list li {
  background: var(--surface);
  border: 1px solid #dde2ec;
  border-left: 3px solid var(--rule);
  padding: 0.85rem 1.15rem;
  margin-bottom: 0.65rem;
  font-size: 0.86rem; line-height: 1.75;
  transition: border-left-color 0.2s;
}

.pub-list li:hover { border-left-color: var(--accent); }
.pub-list li .venue { font-style: italic; color: var(--muted); }
.pub-list li .award {
  color: var(--gold); font-weight: 700;
  font-size: 0.76rem; letter-spacing: 0.03em;
}

.interest-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.interest-card {
  background: var(--surface);
  border: 1px solid #dde2ec;
  padding: 1.2rem 1rem;
  transition: border-color 0.2s;
}

.interest-card:hover { border-color: var(--accent); }
.interest-card .icon { font-size: 1.5rem; margin-bottom: 0.5rem; display: block; }

.interest-card h3 {
  font-family: var(--font-head);
  color: var(--navy); font-size: 0.9rem; margin-bottom: 0.3rem;
}

.interest-card p { font-size: 0.82rem; color: var(--muted); line-height: 1.65; }

.collab-box {
  background: var(--navy);
  color: #ffffff;
  padding: 2.5rem 2rem;
  text-align: center;
  margin-top: 2rem;
  border-top: 2px solid var(--accent);
}

.collab-box h2 {
  font-family: var(--font-head);
  border: none; color: #ffffff;
  font-size: 1.3rem; margin-bottom: 0.55rem;
}

.collab-box h2::after { display: none; }
.collab-box p { color: #9aaac0; margin-bottom: 1.1rem; font-size: 0.9rem; }

footer {
  background: var(--navy);
  color: #6a7488;
  text-align: center;
  padding: 1.1rem;
  font-size: 0.78rem;
  border-top: 1px solid var(--navy-mid);
  letter-spacing: 0.04em;
}

footer a { color: #9aaac0; text-decoration: none; }
footer a:hover { color: #ffffff; }

@media (max-width: 640px) {
  .hero { flex-direction: column; padding: 2.2rem 1.1rem; }
  .section { padding: 2rem 1rem; }
  nav { padding: 0 0.8rem; }
  nav .brand { padding-right: 0.8rem; }
}