:root{
  /* base */
  --bg: #ffffff;
  --surface: #f6f8fb;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --muted2: #64748b;
  --line: #e6eaf0;

  /* brand colors (blue / green / orange) */
  --blue: #2563eb;
  --green: #16a34a;
  --orange: #f59e0b;

  --blue-weak: rgba(37,99,235,0.12);
  --green-weak: rgba(22,163,74,0.12);
  --orange-weak: rgba(245,158,11,0.14);

  --shadow: 0 12px 28px rgba(2,6,23,0.08);
  --radius: 16px;
  --max: 1120px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

.page-hero h1 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: linear-gradient(90deg, #4a7fd4 0%, #3aab6a 25%, #e87a3a 50%, #3aab6a 75%, #4a7fd4 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  line-height: 1.3;
  padding-bottom: 0.15em;
  animation: gradientFlow 15s linear infinite;
}

@keyframes gradientFlow {
  0%   { background-position: 0% center; }
  100% { background-position: 200% center; }
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; text-underline-offset: 4px; }

.container{
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
}

/* accessibility */
.skip{
  position: absolute;
  left: -999px;
  top: 10px;
  padding: 10px 12px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.skip:focus{ left: 10px; z-index: 999; }

/* header */
header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 14px;
}
.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 200px;
}
.logo{
  width: 36px;
  height: 36px;
  border-radius: 12px;
  border: 1px solid rgba(15,23,42,0.10);
  background:
    radial-gradient(circle at 28% 30%, var(--blue) 0 38%, transparent 40%),
    radial-gradient(circle at 70% 35%, var(--green) 0 34%, transparent 36%),
    radial-gradient(circle at 52% 74%, var(--orange) 0 34%, transparent 36%),
    linear-gradient(#ffffff, #ffffff);
  box-shadow: 0 8px 18px rgba(2,6,23,0.10);
}
.brand-title{ display: grid; gap: 2px; }
.brand-title .name{
  font-size: 14px;
  letter-spacing: 0.2px;
  font-weight: 750;
}
.brand-title .tag{
  font-size: 12px;
  color: var(--muted2);
}

nav ul{
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 18px;
  align-items: center;
}
nav a{
  font-size: 14px;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 12px;
}
nav a:hover{
  background: var(--surface);
  text-decoration: none;
  color: var(--text);
}

.nav-right{
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 200px;
  justify-content: flex-end;
}
.pill{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}
.pill strong{ color: var(--text); }

.menu-btn{
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  cursor: pointer;
}

/* mobile menu */
.mobile{
  display: none;
  border-top: 1px solid var(--line);
  background: rgba(255,255,255,0.94);
}
.mobile ul{
  list-style: none;
  margin: 0;
  padding: 10px 0;
  display: grid;
  gap: 6px;
}
.mobile a{
  display: block;
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--muted);
}
.mobile a:hover{
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
}
.mobile.open{ display: block; }

/* hero */
.hero{
  padding: 56px 0 18px;
  background:
    radial-gradient(900px 420px at 12% 10%, var(--blue-weak), transparent 60%),
    radial-gradient(900px 420px at 88% 0%, var(--green-weak), transparent 62%),
    radial-gradient(900px 420px at 60% 95%, var(--orange-weak), transparent 60%);
}
.hero-grid{
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
  align-items: stretch;
}
.card{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-main{ padding: 26px; }

.kicker{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  font-size: 13px;
}
.dot{
  width: 8px; height: 8px;
  border-radius: 999px;
  background: var(--blue);
  box-shadow: 0 0 0 4px var(--blue-weak);
}

h1{
  margin: 14px 0 10px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.12;
  letter-spacing: -0.45px;
}
.lead{
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 72ch;
}

.cta-row{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}
.btn:hover{
  text-decoration: none;
  background: #eef3ff;
}
.btn.primary{
  border-color: rgba(37,99,235,0.20);
  background: rgba(37,99,235,0.10);
  color: #0b2a7a;
}
.btn.primary:hover{ background: rgba(37,99,235,0.14); }

/* side cards */
.hero-side{
  padding: 18px;
  display: grid;
  gap: 12px;
}
.mini{
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 14px;
  padding: 14px;
}
.mini h3{
  margin: 0 0 6px;
  font-size: 13px;
  color: var(--muted2);
  letter-spacing: 0.2px;
  font-weight: 700;
}
.mini p{ margin: 0; color: var(--muted); font-size: 14px; }
.meta{
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip{
  font-size: 12px;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--line);
}

/* content sections */
section{ padding: 26px 0; }
.grid2{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}
.content-card{ padding: 18px; }
.content-card h2{
  margin: 0 0 10px;
  font-size: 18px;
  letter-spacing: -0.2px;
}
.content-card p{ margin: 0; color: var(--muted); font-size: 14px; }

.list{
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.news-item{
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  display: grid;
  gap: 4px;
}
.news-item .date{ font-size: 12px; color: var(--muted2); }
.news-item .title{ font-size: 14px; color: var(--text); }
.news-item .desc{ font-size: 13px; color: var(--muted); }

.quick{
  display: grid;
  gap: 10px;
  margin-top: 12px;
}
.quick a{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
}
.quick a:hover{
  background: #eef3ff;
  color: var(--text);
  text-decoration: none;
}
.arrow{ opacity: 0.7; }

/* footer */
footer{
  margin-top: 18px;
  padding: 22px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--muted2);
  font-size: 13px;
}
.footer-grid{
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 16px;
}
.footer-title{ color: var(--text); font-weight: 750; }
.footer-sub{ margin-top: 6px; color: var(--muted2); }
.footer-links{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}
.footer-links a{
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
}
.footer-links a:hover{
  background: #eef3ff;
  color: var(--text);
  text-decoration: none;
}
.copyright{
  margin-top: 18px;
  color: var(--muted2);
}

/* responsive */
@media (max-width: 920px){
  .hero-grid{ grid-template-columns: 1fr; }
  .nav-right .pill{ display: none; }
}
@media (max-width: 720px){
  nav{ display: none; }
  .menu-btn{ display: inline-flex; align-items: center; justify-content: center; }
  .grid2{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; }
  .hero{ padding-top: 42px; }
}

/* nav dropdown */
.nav-list{ position: relative; }
.nav-link{
  font-size: 14px;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 12px;
  background: transparent;
  border: 0;
  cursor: pointer;
}
.nav-link:hover{
  background: var(--surface);
  color: var(--text);
}
.has-dropdown{ position: relative; }
.dropdown{
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  min-width: 180px;
  padding: 8px;
  margin: 0;
  list-style: none;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 14px;
  box-shadow: var(--shadow);
  display: none;
  z-index: 60;
}
.dropdown a{
  display: block;
  padding: 10px 10px;
  border-radius: 12px;
  color: var(--muted);
}
.dropdown a:hover{
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
}
.has-dropdown:hover .dropdown{ display: block; }
.dropdown-toggle[aria-expanded="true"] + .dropdown{ display: block; }
.chev{ margin-left: 6px; opacity: 0.7; }

/* mobile lists */
.mobile-list{ list-style: none; margin: 0; padding: 10px 0; display: grid; gap: 6px; }
.mobile-group{ padding: 0 0 6px; }
.mobile-accordion{
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.mobile-accordion:hover{ background: var(--surface); color: var(--text); }
.mobile-sub{
  list-style: none;
  margin: 6px 0 0;
  padding: 0 0 0 8px;
  display: none;
  gap: 6px;
}
.mobile-sub.open{ display: grid; }

/* page hero */
.page-hero{
  padding: 42px 0 10px;
  background:
    radial-gradient(900px 380px at 12% 0%, var(--blue-weak), transparent 62%),
    radial-gradient(900px 380px at 88% 0%, var(--green-weak), transparent 62%);
}
.page-hero-inner{
  padding: 18px 0 8px;
}
.page-hero h1{
  margin: 0 0 8px;
  font-size: clamp(28px, 3.2vw, 38px);
  letter-spacing: -0.35px;
}

/* utilities */
.muted{ color: var(--muted2); }

/* cards grid */
.cards3{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 920px){
  .cards3{ grid-template-columns: 1fr; }
}

/* mini cards */
.mini-card, .person-card{
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 14px;
  padding: 14px;
}
.mini-card h3, .person-card h3{ margin: 0 0 6px; font-size: 16px; }
.mini-card p, .person-card p{ margin: 0; color: var(--muted); font-size: 14px; }
.text-link{ color: var(--blue); }
.text-link:hover{ text-decoration: underline; }

/* profile */
.profile{
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 18px;
  align-items: start;
}
@media (max-width: 720px){
  .profile{ grid-template-columns: 1fr; }
}
.avatar{
  width: 140px;
  height: 140px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 35% 30%, var(--blue-weak), transparent 55%),
    radial-gradient(circle at 70% 40%, var(--green-weak), transparent 55%),
    radial-gradient(circle at 50% 75%, var(--orange-weak), transparent 55%),
    var(--surface);
}
.profile-body h2{ margin: 0 0 6px; }
.profile-links{ display: flex; flex-wrap: wrap; gap: 10px; margin: 12px 0 6px; }

/* bullets and pubs */
.bullets{ margin: 10px 0 0; color: var(--muted); }
.pubs{ margin: 10px 0 0; padding-left: 18px; color: var(--muted); display: grid; gap: 10px; }
.pub-title{ display: block; color: var(--text); }
.pub-meta{ display: block; color: var(--muted2); font-size: 13px; }

/* photos */
.photo-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 920px){
  .photo-grid{ grid-template-columns: 1fr; }
}
.photo-tile {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--surface);
}
.photo-tile img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}
.photo-ph{
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(135deg, var(--blue-weak), transparent 55%),
    linear-gradient(225deg, var(--green-weak), transparent 55%),
    linear-gradient(315deg, var(--orange-weak), transparent 55%),
    #ffffff;
}
.photo-tile figcaption{
  padding: 10px 12px;
  color: var(--muted);
  font-size: 13px;
}

/* alumni */
.alumni-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.alumni-item{
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  display: grid;
  gap: 4px;
}
.alumni-name{ font-weight: 700; }
.alumni-meta{ color: var(--muted2); font-size: 13px; }
.alumni-now{ color: var(--muted); font-size: 14px; }

/* home: make hero grid behave nicely */
.hero-grid-home{ align-items: start; }

/* home: news full width + horizontal layout */
.news-full .news-head{
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.news-row{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.news-row .news-item{
  height: 100%;
}

@media (max-width: 920px){
  .news-row{ grid-template-columns: 1fr; }
}

/* brand: logo only */
.brand-logo-only{
  min-width: auto;
  gap: 0;
}

.brand-logo{
  height: 34px;
  width: auto;
  display: block;
}

/* right pill: yonsei logo + text, no bold */
.pill-yonsei{
  gap: 8px;
}

.pill-logo{
  height: 16px;
  width: auto;
  display: block;
}

.pill-text{
  font-weight: 500;
}

/* optional: if your vcc logo is tall, adjust on mobile */
@media (max-width: 720px){
  .brand-logo{ height: 32px; }
}