:root {
  --bg: #071225;
  --panel: rgba(8, 18, 38, 0.78);
  --line: rgba(255, 255, 255, 0.1);
  --text: #f2f6ff;
  --muted: #b8c9df;
  --accent: #7ab8ff;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.24);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: "Pretendard Variable", Pretendard, "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    linear-gradient(rgba(3, 9, 22, 0.64), rgba(3, 9, 22, 0.92)),
    url('./assets/portal-bg.webp') center / cover fixed no-repeat,
    var(--bg);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 86% 4%, rgba(94, 159, 255, 0.12), transparent 30%);
}

a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -70px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 10px;
  background: white;
  color: #071225;
  font-weight: 800;
  text-decoration: none;
}
.skip-link:focus { top: 16px; }

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.hero { padding: 34px 0 18px; }
.topbar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #c6d6ea;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
}
.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #7ab8ff;
  box-shadow: 0 0 12px rgba(122,184,255,.6);
}

.hero-card,
.category-card {
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  box-shadow: var(--shadow);
}
.hero-card {
  margin-top: 14px;
  padding: 30px 32px;
  border-radius: 22px;
}
.hero-main { max-width: 860px; }
.eyebrow {
  margin: 0 0 9px;
  color: #9ec6fa;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .17em;
}
h1 {
  margin: 0;
  font-size: clamp(2rem, 4.6vw, 3.7rem);
  line-height: 1.05;
  letter-spacing: -.045em;
}
h1 span {
  display: block;
  margin-top: 8px;
  color: #d2dfef;
  font-size: clamp(1.05rem, 1.9vw, 1.5rem);
  font-weight: 650;
  letter-spacing: -.02em;
}
.subtitle {
  margin: 18px 0 8px;
  color: #e2ebf7;
  font-size: 1.08rem;
  font-weight: 700;
}
.description,
.category-description,
.item-card p,
.footer-card p {
  color: var(--muted);
  line-height: 1.68;
}
.description { margin: 0; max-width: 780px; }

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 21px;
}
.quick-link {
  padding: 9px 12px;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  background: rgba(255,255,255,.04);
  color: #dce8f6;
  text-decoration: none;
  font-size: .88rem;
  font-weight: 700;
  transition: background .16s ease, border-color .16s ease;
}
.quick-link:hover,
.quick-link:focus-visible {
  background: rgba(255,255,255,.08);
  border-color: rgba(143,190,255,.24);
}

.main { padding: 8px 0 40px; }
.portal-grid { display: grid; gap: 14px; }
.category-card {
  scroll-margin-top: 18px;
  padding: 22px;
  border-radius: 20px;
}
.category-head {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 14px;
  align-items: center;
  margin-bottom: 16px;
}
.category-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 15px;
  font-size: 1.35rem;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.18);
}
.media-icon { background: linear-gradient(135deg, #376fcb, #65a9e9); }
.publishing-icon { background: linear-gradient(135deg, #5f58c9, #8b79dc); }
.research-icon { background: linear-gradient(135deg, #2f67b8, #43a5d7); }
.apps-icon { background: linear-gradient(135deg, #2782c5, #55b9df); }
.education-icon { background: linear-gradient(135deg, #9c6c25, #c8a85e); }
.category-head h2 { margin: 2px 0 4px; font-size: 1.45rem; letter-spacing: -.02em; }
.category-description { margin: 0; font-size: .93rem; }

.items-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 11px;
}
.items-grid.one-item { grid-template-columns: minmax(0, 560px); }
.item-card {
  display: flex;
  flex-direction: column;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.075);
  border-radius: 16px;
  background: rgba(255,255,255,.035);
  transition: background .16s ease, border-color .16s ease;
}
.item-card:hover {
  background: rgba(255,255,255,.055);
  border-color: rgba(143,190,255,.22);
}
.item-top { display: flex; justify-content: space-between; gap: 8px; align-items: center; flex-wrap: wrap; }
.item-meta,
.item-domain {
  color: #aebfd3;
  font-size: .76rem;
  font-weight: 700;
}
.item-card h3 { margin: 13px 0 7px; font-size: 1.17rem; line-height: 1.4; }
.item-card p { margin: 0; flex: 1; font-size: .93rem; }
.item-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.visit-link,
.copy-btn {
  min-height: 39px;
  padding: 0 13px;
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 10px;
  font: inherit;
  font-size: .86rem;
  font-weight: 750;
  cursor: pointer;
  transition: background .16s ease, border-color .16s ease;
}
.visit-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: rgba(73,139,225,.9);
  color: white;
  text-decoration: none;
}
.copy-btn { background: rgba(255,255,255,.035); color: #dbe6f3; }
.visit-link:hover,
.copy-btn:hover { border-color: rgba(143,190,255,.28); }
.visit-link:focus-visible,
.copy-btn:focus-visible,
.quick-link:focus-visible,
.footer-card a:focus-visible {
  outline: 2px solid rgba(143,190,255,.7);
  outline-offset: 3px;
}

.footer { padding: 0 0 36px; }
.footer-card {
  padding: 18px;
  border-top: 1px solid rgba(255,255,255,.09);
  text-align: center;
}
.footer-card strong { font-size: 1rem; }
.footer-card p { margin: 6px auto 10px; font-size: .88rem; }
.footer-card a { color: #9fc7ff; font-weight: 700; text-decoration: none; font-size: .88rem; }
.footer-meta {
  margin-top: 13px;
  padding-top: 13px;
  border-top: 1px solid rgba(255,255,255,.07);
}
.footer-meta p {
  margin: 2px auto;
  color: #9fb1c8;
  font-size: .82rem;
  line-height: 1.55;
}
.footer-meta .contact a { font-weight: 650; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  z-index: 50;
  transform: translate(-50%, 20px);
  padding: 10px 14px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 999px;
  background: rgba(4,12,27,.95);
  color: white;
  font-size: .86rem;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 760px) {
  body { background-attachment: scroll; }
  .hero { padding-top: 24px; }
  .hero-card { padding: 24px 20px; }
  .category-card { padding: 18px; }
  .category-head { grid-template-columns: 46px 1fr; gap: 12px; }
  .category-icon { width: 46px; height: 46px; border-radius: 13px; font-size: 1.15rem; }
  .category-head h2 { font-size: 1.3rem; }
  .items-grid, .items-grid.one-item { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .container { width: calc(100% - 18px); }
  .quick-link { flex: 1 1 calc(50% - 8px); text-align: center; }
  .item-top { align-items: flex-start; }
  .item-actions { display: grid; grid-template-columns: 1fr 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}