/* ============================================================
   2026 하계 DI × HCI 워크숍 — dark cosmos theme
   ============================================================ */

:root {
  --bg: #04050c;
  --bg-soft: #0a0d1f;
  --surface: rgba(148, 163, 216, 0.06);
  --surface-strong: rgba(148, 163, 216, 0.10);
  --border: rgba(148, 163, 216, 0.16);
  --border-glow: rgba(255, 179, 102, 0.45);
  --text: #e9ecfa;
  --muted: #9aa3c4;
  --faint: #7b84ab; /* 어두운 배경에서 WCAG AA(4.5:1) 이상 */
  --nova-1: #ffd27a; /* gold  */
  --nova-2: #ff8a4c; /* orange */
  --nova-3: #ff4d8d; /* magenta */
  --star-cyan: #7fe3ff;
  --star-violet: #9b8cff;
  --grad-nova: linear-gradient(100deg, var(--nova-1) 0%, var(--nova-2) 45%, var(--nova-3) 100%);
  --font-sans: "Pretendard Variable", Pretendard, -apple-system, sans-serif;
  --font-disp: "Space Grotesk", "Pretendard Variable", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --maxw: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  background-image: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(120, 90, 255, 0.12), transparent 60%),
                    radial-gradient(ellipse 60% 40% at 85% 110%, rgba(255, 138, 76, 0.07), transparent 60%);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  word-break: keep-all; /* 한국어 단어 중간 줄바꿈 방지 */
}

.mono { font-family: var(--font-mono); letter-spacing: 0.04em; }
.sm { font-size: 0.78rem; }

::selection { background: rgba(255, 138, 76, 0.35); }

/* ---------- 캔버스 & 커서 ---------- */
#cosmos {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

#cursor-glow {
  position: fixed;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  background: radial-gradient(circle, rgba(255, 179, 102, 0.12) 0%, rgba(155, 140, 255, 0.06) 40%, transparent 70%);
  transform: translate(-50%, -50%);
  transition: opacity 0.4s;
  opacity: 0;
}

main, .footer { position: relative; z-index: 2; }

/* ---------- 내비게이션 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem clamp(1rem, 4vw, 2.5rem);
  background: rgba(4, 5, 12, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.nav.scrolled { border-bottom-color: var(--border); background: rgba(4, 5, 12, 0.8); }

.nav-brand {
  display: flex; align-items: center; gap: 0.5rem;
  color: var(--text); text-decoration: none;
  font-size: 0.85rem; font-weight: 600;
  white-space: nowrap;
}
.nav-star { color: var(--nova-2); text-shadow: 0 0 12px var(--nova-2); }

.nav-links { display: flex; align-items: center; gap: clamp(0.8rem, 2.5vw, 1.8rem); }
.nav-links a {
  color: var(--muted); text-decoration: none;
  font-size: 0.85rem; font-weight: 500;
  white-space: nowrap; /* "오시는 길"이 중간에 줄바꿈되지 않게 */
  padding: 0.6rem 0.4rem; margin: -0.6rem -0.4rem; /* 시각 크기 유지하며 터치 영역 확보 */
  transition: color 0.2s, text-shadow 0.2s;
}
.nav-links a:hover { color: var(--nova-1); text-shadow: 0 0 14px rgba(255, 210, 122, 0.6); }

/* ---------- 연도 선택 드롭다운 ---------- */
.nav-year { position: relative; display: flex; align-items: center; }
.nav-year-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  font-size: 0.8rem;
  padding: 0.3rem 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.25s, box-shadow 0.25s, color 0.25s;
}
.nav-year-btn:hover { border-color: var(--border-glow); color: var(--nova-1); box-shadow: 0 0 14px rgba(255, 179, 102, 0.2); }
.nav-year-btn .caret { font-size: 0.7em; opacity: 0.7; }

.year-menu[hidden] { display: none; }
.year-menu {
  position: absolute;
  top: calc(100% + 0.6rem);
  right: 0;
  list-style: none;
  min-width: 6.5rem;
  padding: 0.4rem;
  background: rgba(10, 13, 31, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.55);
  z-index: 60;
}
/* 배경 하이라이트 없음 — 호버 시 글자색만 변화 */
.year-item {
  display: block;
  padding: 0.42rem 0.8rem;
  font-size: 0.8rem;
  color: var(--muted);
  text-decoration: none;
  text-align: center;
  transition: color 0.2s;
}
a.year-item:hover { color: var(--nova-1); }
/* 현재 연도: ✦ 2026 ✦ — 별은 absolute라 숫자 중앙정렬에 영향 없음 */
.year-item.active { color: var(--nova-1); position: relative; }
.year-item.active::before,
.year-item.active::after {
  content: "✦";
  position: absolute;
  top: 50%;
  transform: translateY(-58%); /* 숫자 세로 중심에 맞춤 */
  font-size: 0.9em;
  opacity: 0.9;
}
.year-item.active::before { left: 1.15rem; }
.year-item.active::after { right: 1.15rem; }

/* ---------- 리빌 애니메이션 ----------
   JS가 살아있을 때(.js)만 숨김 상태로 시작 — JS 실패/비활성 시 전부 보임 */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.js .reveal.visible { opacity: 1; transform: none; }

:focus-visible { outline: 2px solid var(--star-cyan); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .scroll-down span { animation: none !important; }
}

/* ---------- HERO ---------- */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 7rem 1.25rem 4rem;
  position: relative;
}

.hero-eyebrow {
  color: var(--star-cyan);
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 1.4rem;
  text-shadow: 0 0 18px rgba(127, 227, 255, 0.5);
}

.hero-title {
  font-family: var(--font-disp);
  font-weight: 700;
  font-size: clamp(2.6rem, 8.5vw, 5.6rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}
.hero-title .line { display: block; }
.hero-title .grad {
  background: var(--grad-nova);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 28px rgba(255, 138, 76, 0.35));
}

.hero-host { margin-top: 1.1rem; color: var(--muted); font-size: clamp(0.95rem, 2vw, 1.1rem); font-weight: 500; }

.hero-dates {
  margin-top: 1.6rem;
  display: flex; align-items: center; gap: 0.9rem;
  color: var(--text); font-size: clamp(0.85rem, 2vw, 1rem);
}
.hero-dates .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--nova-2); box-shadow: 0 0 10px var(--nova-2); }

.hero-places { margin-top: 1.5rem; display: flex; flex-wrap: wrap; gap: 0.6rem; justify-content: center; }

/* ---------- 칩 ---------- */
.chip {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.42rem 0.95rem;
  cursor: pointer;
  transition: border-color 0.25s, box-shadow 0.25s, background 0.25s, transform 0.25s;
}
.chip:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 18px rgba(255, 179, 102, 0.25), inset 0 0 12px rgba(255, 179, 102, 0.06);
  background: var(--surface-strong);
  transform: translateY(-1px);
}
.chip.sm { font-size: 0.72rem; padding: 0.28rem 0.75rem; }

/* ---------- 카운트다운 ---------- */
.countdown {
  margin-top: 2.6rem;
  display: flex; align-items: center; gap: clamp(0.5rem, 2vw, 1.1rem);
  padding: 1.1rem clamp(1rem, 4vw, 2.2rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.cd-cell { display: flex; flex-direction: column; align-items: center; min-width: clamp(3rem, 9vw, 4.4rem); }
.cd-num {
  font-size: clamp(1.7rem, 5.5vw, 2.6rem);
  font-weight: 500;
  color: var(--text);
  text-shadow: 0 0 22px rgba(255, 210, 122, 0.35);
  font-variant-numeric: tabular-nums;
}
.cd-label { font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.25em; color: var(--faint); margin-top: 0.2rem; }
.cd-sep { font-size: clamp(1.4rem, 4vw, 2rem); color: var(--nova-2); opacity: 0.7; padding-bottom: 1rem; }
/* 종료 후: D+n 옆에 DAYS 붙임 */
.cd-done { flex-direction: row; align-items: baseline; gap: 0.6rem; }
.cd-done .cd-label { margin-top: 0; font-size: clamp(0.72rem, 1.8vw, 0.95rem); letter-spacing: 0.2em; color: var(--muted); }
.cd-status { margin-top: 0.9rem; color: var(--nova-1); font-size: 0.8rem; letter-spacing: 0.15em; min-height: 1.2em; }

.scroll-down {
  position: absolute; bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 44px;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  display: flex; justify-content: center;
}
.scroll-down span {
  width: 4px; height: 8px; border-radius: 4px;
  background: var(--nova-1);
  margin-top: 8px;
  animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot { 0%,100% { transform: translateY(0); opacity: 1; } 60% { transform: translateY(16px); opacity: 0; } }

/* ---------- 섹션 공통 ---------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(4.5rem, 10vw, 7.5rem) 1.25rem 0;
}
.section-eyebrow { color: var(--star-cyan); font-size: 0.72rem; letter-spacing: 0.28em; margin-bottom: 0.7rem; }
.section-title {
  font-family: var(--font-disp);
  font-size: clamp(1.7rem, 4.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section-desc { margin-top: 0.8rem; color: var(--muted); font-size: 0.95rem; max-width: 760px; }

/* ---------- 참여 연구실 ---------- */
.school-grid {
  margin-top: 2.4rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
@media (max-width: 900px) { .school-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .school-grid { grid-template-columns: 1fr; } }

.school-logo {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
  overflow: hidden;
}
.school-logo img { width: 78%; height: 78%; object-fit: contain; display: block; }
.school-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem 1.4rem;
  transition: transform 0.3s ease, border-color 0.3s, box-shadow 0.3s;
  overflow: hidden;
}
.school-card::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 0%), rgba(255, 179, 102, 0.10), transparent 65%);
  opacity: 0;
  transition: opacity 0.35s;
  pointer-events: none;
}
.school-card:hover { transform: translateY(-4px); border-color: var(--border-glow); box-shadow: 0 12px 36px rgba(0, 0, 0, 0.45), 0 0 24px rgba(255, 138, 76, 0.10); }
.school-card:hover::before { opacity: 1; }

.school-badge {
  position: absolute; top: 1.1rem; right: 1.1rem;
  font-size: 0.62rem; letter-spacing: 0.2em;
  padding: 0.18rem 0.55rem; border-radius: 999px;
}
.host-badge { color: var(--nova-1); border: 1px solid rgba(255, 210, 122, 0.5); box-shadow: 0 0 14px rgba(255, 210, 122, 0.25); }

.school-name { font-family: var(--font-disp); font-size: 1.25rem; font-weight: 600; }
.school-full { color: var(--faint); font-size: 0.78rem; margin-top: 0.2rem; }
.prof-list { list-style: none; margin-top: 1rem; display: flex; flex-direction: column; gap: 0.3rem; }
.prof-list li { color: var(--muted); font-size: 0.9rem; }
.prof-list li::before { content: "✦ "; color: var(--nova-2); font-size: 0.7em; }
/* 교수님 이름 옆 랩 링크 (은은한 회색 → 호버 보라) */
.prof-lab {
  margin-left: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--faint);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s;
}
a.prof-lab:hover { color: var(--star-violet); }

/* ---------- 타임라인 ---------- */
.day-block { margin-top: 3rem; }

.day-head {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.9rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.day-tag {
  background: var(--grad-nova);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-weight: 600; font-size: 0.95rem; letter-spacing: 0.15em;
}
.day-date { font-family: var(--font-disp); font-size: 1.4rem; font-weight: 600; }
.day-date em { font-style: normal; font-size: 0.85rem; color: var(--muted); margin-left: 0.3rem; }
.day-place { margin-left: auto; color: var(--faint); font-size: 0.75rem; }

.timeline { list-style: none; margin-top: 0.4rem; position: relative; }
.timeline::before {
  content: "";
  position: absolute; top: 0; bottom: 0; left: 7.4rem;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--border) 8%, var(--border) 92%, transparent);
}

.tl-item {
  position: relative;
  display: flex; gap: 1.2rem;
  padding: 1.15rem 0 1.15rem 0;
}
.tl-item::before {
  content: "";
  position: absolute; left: calc(7.4rem - 6px); top: 1.65rem;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--faint);
  transition: border-color 0.4s, box-shadow 0.4s, background 0.4s;
}
.tl-item.visible::before { border-color: var(--nova-2); box-shadow: 0 0 12px rgba(255, 138, 76, 0.7); }
.tl-item.keynote.visible::before { background: var(--nova-2); }

.tl-time { flex: 0 0 6.8rem; text-align: left; color: var(--star-cyan); font-size: 0.78rem; padding-top: 0.35rem; white-space: nowrap; }
.tl-body { flex: 1; padding-left: 1.2rem; }

.tl-title { font-size: 1.02rem; font-weight: 600; }
.tl-item.keynote .tl-title {
  background: var(--grad-nova);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: inline-block;
}
.tl-speaker { color: var(--text); font-size: 0.88rem; margin-top: 0.15rem; }
.tl-speaker b { color: var(--text); }

.tl-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.55rem; margin-top: 0.55rem; }

/* 시간 아래에 위치 표기 (저녁 · 마무리) — 시간 폭 기준 중앙정렬 */
.tl-time-col {
  flex: 0 0 6.8rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: 0.35rem;
}
.tl-time-col .tl-time { flex: none; padding-top: 0; text-align: center; }
.tl-sublabel {
  display: block;
  margin-top: 0.4rem;
  background: none; border: none; padding: 0;
  font-family: var(--font-mono); font-size: 0.68rem;
  color: var(--faint);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s;
}
.tl-sublabel:hover { color: var(--star-cyan); }

/* 제목 옆에 링크 (저녁 식사 — 네이버 지도) */
.tl-titlerow { display: flex; align-items: baseline; gap: 0.75rem; flex-wrap: wrap; }
.tl-note { color: var(--faint); font-size: 0.75rem; }
.tl-note.warn { color: var(--nova-3); }
.tl-link { color: var(--star-cyan); font-size: 0.75rem; text-decoration: none; border-bottom: 1px dotted rgba(127, 227, 255, 0.4); }
.tl-link:hover { text-shadow: 0 0 12px rgba(127, 227, 255, 0.6); }

/* ---------- 지도 ---------- */
.map-wrap {
  margin-top: 2.2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.3rem;
}

.map-tabs { display: flex; flex-wrap: wrap; gap: 0.55rem; }
.map-tab {
  font-family: var(--font-sans);
  font-size: 0.85rem; font-weight: 600;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.55rem 1rem;
  cursor: pointer;
  transition: all 0.25s;
}
.map-tab .room { font-size: 0.7rem; color: var(--faint); margin-left: 0.3rem; }
.map-tab:hover { border-color: var(--border-glow); color: var(--text); }
.map-tab.active {
  color: #14060a;
  background: var(--grad-nova);
  /* 그라데이션을 크게 그려 가장자리 1px에 반대쪽 색이 새는(wrap) 렌더링 아티팩트 제거 */
  background-size: 130% 130%;
  background-position: center;
  border-color: transparent;
  box-shadow: 0 0 20px rgba(255, 138, 76, 0.35);
}
.map-tab.active .room { color: rgba(20, 6, 10, 0.7); }

.map-info { margin-top: 1.1rem; display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.7rem; }
.map-title { font-size: 1.05rem; font-weight: 700; }
.room-badge {
  font-size: 0.72rem; color: var(--nova-1);
  border: 1px solid rgba(255, 210, 122, 0.45);
  border-radius: 999px; padding: 0.12rem 0.55rem;
  margin-left: 0.4rem;
}
.map-desc { color: var(--faint); font-size: 0.82rem; }

.map-frame {
  margin-top: 1rem;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 16 / 9;
  background: var(--bg-soft);
}
.map-frame iframe { width: 100%; height: 100%; border: 0; display: block; filter: saturate(0.85); }
.map-frame iframe[hidden] { display: none; }

#naver-map { width: 100%; height: 100%; }
#naver-map[hidden] { display: none; }

/* 네이버 지도 마커 라벨 */
.nv-marker {
  position: relative;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  color: #fff;
  background: #1b1f33;
  border: 1px solid rgba(255, 138, 76, 0.6);
  border-radius: 8px;
  padding: 5px 10px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.35);
  cursor: pointer;
}
.nv-marker::after {
  content: "";
  position: absolute;
  left: 50%; bottom: -6px;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: #1b1f33;
  border-bottom: 0;
}
.nv-marker.active {
  background: linear-gradient(100deg, #ffd27a, #ff8a4c);
  background-size: 130% 130%;
  background-position: center;
  color: #14060a;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(255, 138, 76, 0.5);
  z-index: 10;
}
.nv-marker.active::after { border-top-color: #ff8a4c; }

.map-links { margin-top: 0.9rem; display: flex; gap: 1.2rem; }

/* ---------- 갤러리 ---------- */
.gallery-grid {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.9rem;
}
.gallery-item {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 4 / 3;
  cursor: zoom-in;
  background: var(--bg-soft);
  transition: transform 0.3s ease, box-shadow 0.3s, border-color 0.3s;
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.5s ease; }
.gallery-item:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  /* 안쪽 링까지 더해 테두리를 두껍고 확실하게 */
  outline: 3px solid var(--nova-2); /* 골드보다 레드 기 있는 주황 */
  outline-offset: -1px;
  box-shadow: 0 14px 34px rgba(0,0,0,0.5), 0 0 30px rgba(255,138,76,0.3);
}
.gallery-item:hover img { transform: scale(1.06); }
.gallery-item .cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 1.6rem 0.9rem 0.7rem;
  font-size: 0.78rem; color: var(--text);
  background: linear-gradient(to top, rgba(4,5,12,0.85), transparent);
  opacity: 0; transition: opacity 0.3s;
}
.gallery-item:hover .cap { opacity: 1; }

.gallery-empty {
  margin-top: 2.2rem;
  border: 1px dashed var(--border);
  border-radius: 16px;
  padding: 3.2rem 1.5rem;
  text-align: center;
  color: var(--muted);
}
.ge-star { display: block; font-size: 1.6rem; color: var(--nova-2); text-shadow: 0 0 18px var(--nova-2); margin-bottom: 0.8rem; }
.gallery-empty .sm { color: var(--faint); margin-top: 0.4rem; }

/* ---------- 라이트박스 ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(2, 3, 8, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 3.5rem 1.25rem 2rem;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: min(92vw, 1100px); max-height: 78vh; border-radius: 10px; box-shadow: 0 24px 80px rgba(0,0,0,0.7); cursor: zoom-out; }
.lb-caption { margin-top: 1rem; color: var(--muted); font-size: 0.8rem; }
.lb-close {
  position: absolute; top: 0.6rem; right: 0.8rem;
  background: none; border: none;
  color: var(--muted); font-size: 2.2rem; line-height: 1;
  padding: 0.4rem 0.7rem; min-width: 44px; min-height: 44px;
  cursor: pointer; transition: color 0.2s, text-shadow 0.2s;
}
.lb-close:hover { color: var(--nova-1); text-shadow: 0 0 16px var(--nova-1); }

/* ---------- 안내 ---------- */
.info-grid {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}
.info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem 1.4rem;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.info-card:hover { transform: translateY(-4px); border-color: var(--border-glow); box-shadow: 0 0 24px rgba(255,138,76,0.10); }
.info-tag { color: var(--star-cyan); font-size: 0.68rem; letter-spacing: 0.22em; }
.info-main { margin-top: 0.7rem; font-size: 1.15rem; font-weight: 700; }
.info-main .plus { color: var(--nova-2); }
.info-sub { margin-top: 0.4rem; color: var(--faint); font-size: 0.8rem; }

/* ---------- 세션 형식 안내 (일정 상단 요약) ---------- */
.sched-legend {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: center;
  gap: 0.55rem 1rem;
  padding: 0.9rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.leg-item { color: var(--muted); font-size: 0.8rem; }
.leg-item:nth-child(1) { justify-self: start; }
.leg-item:nth-child(2) { justify-self: center; }
.leg-item:nth-child(3) { justify-self: end; }
.leg-item b {
  color: var(--star-cyan);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  margin-right: 0.45rem;
}

/* ---------- 키노트 (일정 내, 창 형태 · 사진 왼쪽 · 테두리 강조) ---------- */
.kn-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  padding: 1rem 1.2rem;
  border-radius: 14px;
  background: var(--surface);
  overflow: hidden;
  box-shadow: 0 0 22px rgba(255, 138, 76, 0.14);
}
/* 강조된 그라데이션 테두리 — 색이 천천히 흐름 */
.kn-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 2px;
  background: linear-gradient(100deg, #ffd27a, #ff8a4c, #ff4d8d, #ff8a4c, #ffd27a);
  background-size: 200% 100%;
  animation: knFlow 6s linear infinite;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}
@keyframes knFlow {
  from { background-position: 0% 50%; }
  to   { background-position: -200% 50%; }
}
/* 커서 추적 스포트라이트 — 커서 위치의 테두리가 밝아짐 (카드 밖·근처여도 반응) */
.kn-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 2px;
  background: radial-gradient(circle 160px at var(--mx, 50%) var(--my, -40%),
              rgba(255, 245, 230, 0.95), rgba(255, 190, 130, 0.35) 42%, transparent 72%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}
@media (prefers-reduced-motion: reduce) {
  .kn-card::before { animation: none; }
}
.kn-photo {
  flex: 0 0 auto;
  width: 76px; height: 76px;
  border-radius: 14px;
  object-fit: cover;
  object-position: center 22%; /* 얼굴이 위로 잘리지 않게 살짝 아래로 */
  background: #fff;            /* 빈 공간은 흰색 */
  border: 1px solid var(--border);
}
.kn-photo.placeholder {
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-disp);
  font-size: 1.7rem; font-weight: 700;
  color: #14060a;
  background: var(--grad-nova);
  border: none;
}
.kn-info { min-width: 0; }
.kn-lab { color: var(--text); text-decoration: none; transition: color 0.25s; white-space: nowrap; }
.kn-lab:hover { color: var(--star-violet); }
/* 작은 텍스트 화살표 (이모지 렌더 방지 — mono 폰트 강제) */
.ext-arrow { font-size: 0.82em; font-variant-emoji: text; }
.kn-topic {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

/* ---------- 오럴 발표 (일정 내 · 이름+랩 위, 제목 아래) ---------- */
.oral-talks {
  margin-top: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.talk {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.6rem 0.9rem;
  border-radius: 10px;
  background: var(--surface);
  overflow: hidden;
}
/* 가장자리 그라데이션 테두리 (키노트보다 옅게) */
.talk::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--grad-nova);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  opacity: 0.5;
}
.talk-head { display: flex; align-items: baseline; gap: 0.55rem; flex-wrap: wrap; }
.talk-name { font-size: 0.92rem; font-weight: 700; }
.talk-name.tbd { color: var(--faint); font-weight: 500; }
.talk-lab { font-size: 0.72rem; color: var(--star-violet); }
.talk-title { font-size: 0.82rem; color: var(--muted); }
.talk-title.tbd { color: var(--faint); }

@media (max-width: 640px) {
  .talk { flex-wrap: wrap; gap: 0.3rem 0.6rem; }
  .talk-title { flex-basis: 100%; }
  .kn-photo { width: 60px; height: 60px; }
}

/* ---------- 푸터 ---------- */
.footer {
  margin-top: clamp(5rem, 10vw, 8rem);
  padding: 2.6rem 1.25rem 3rem;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--faint);
}
.footer-brand { color: var(--muted); font-weight: 600; font-size: 0.92rem; margin-bottom: 0.3rem; }

/* ---------- 모바일 ---------- */
@media (max-width: 640px) {
  .nav-links { gap: 0.7rem; }
  .nav-links a { font-size: 0.75rem; }

  .timeline::before { left: 0.35rem; }
  .tl-item { flex-direction: column; gap: 0.15rem; padding-left: 1.4rem; }
  .tl-item::before { left: 0; top: 1.35rem; }
  .tl-time { flex: none; text-align: left; padding-top: 0; }
  .tl-body { padding-left: 0; }

  /* 모바일: 레전드 세로 정렬 */
  .sched-legend { grid-template-columns: 1fr; gap: 0.4rem; }
  .leg-item, .leg-item:nth-child(1), .leg-item:nth-child(2), .leg-item:nth-child(3) { justify-self: start; }

  /* 모바일: 시간+위치 한 줄 왼쪽 정렬 (column 레이아웃에서 6.8rem이 높이로 잡히던 큰 틈 제거) */
  .tl-time-col { flex: none; flex-direction: row; align-items: baseline; gap: 0.5rem; padding-top: 0; text-align: left; }
  .tl-time-col .tl-time { text-align: left; }
  .tl-sublabel { margin-top: 0; text-align: left; }

  .day-place { margin-left: 0; flex-basis: 100%; }
  .map-frame { aspect-ratio: 4 / 5; }
  #cursor-glow { display: none; }
}

/* 갤러리가 1열이 되는 좁은 화면에서만 상단바 압축 (2열 구간에선 풀 상단바 유지) */
@media (max-width: 540px) {
  .nav { padding: 0.8rem 0.75rem; }
  .nav-brand { font-size: 0.78rem; gap: 0.35rem; }
  .nav-links { gap: 0.55rem; }
  .nav-links a { font-size: 0.72rem; padding: 0.6rem 0.15rem; margin: -0.6rem -0.15rem; }
  .nav-year-btn { font-size: 0.72rem; padding: 0.26rem 0.6rem; }
  .brand-year { display: none; }          /* 브랜드에서 연도 숨김 */
  .nav-year-btn .caret { display: none; } /* ▾ 숨김 */
}