:root {
  --navy-950: #020920;
  --navy-900: #06143a;
  --navy-850: #0a1a45;
  --navy-800: #0b1d4d;
  --navy-700: #13306e;
  --blue: #1f5fbf;
  --gold: #d8b968;
  --gold-hi: #f3e2a9;
  --gold-lo: #a9853d;
  --silver: #e6e8ee;
  --dim: rgba(230, 232, 238, .68);
  --ink: #1b2333;
  --ink-2: #4a5468;
  --ink-3: #7a8296;
  --line: #e2e6ef;
  --paper: #f6f7fb;
  --danger: #d6455d;
  --header-h: 72px;
  --font: 'Pretendard Variable', Pretendard, -apple-system, 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  --font-en: 'Montserrat', var(--font);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  margin: 0; font-family: var(--font); color: var(--silver); background: var(--navy-950);
  -webkit-font-smoothing: antialiased; word-break: keep-all; line-height: 1.6;
}
body.lock { overflow: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
button { font: inherit; cursor: pointer; color: inherit; }
[hidden] { display: none !important; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.wrap.narrow { max-width: 860px; }
.br-m { display: none; }

/* ---------- reveal on scroll ---------- */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s ease; }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- buttons ---------- */
.pill-btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 9px 20px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .35); background: rgba(255, 255, 255, .02);
  font-size: 13px; font-weight: 600; letter-spacing: .02em; text-decoration: none; color: #fff; white-space: nowrap;
  transition: border-color .2s, background .2s, color .2s;
}
.pill-btn:hover { border-color: var(--gold); color: var(--gold-hi); background: rgba(216, 185, 104, .08); }
.btn-solid, .btn-line {
  display: inline-flex; align-items: center; justify-content: center; padding: 11px 24px; border-radius: 10px;
  font-weight: 700; font-size: 15px; text-decoration: none; border: 1px solid transparent;
}
.btn-solid { background: var(--navy-800); color: #fff; }
.btn-solid:hover { background: var(--navy-700); }
.btn-line { background: #fff; color: var(--navy-800); border-color: var(--line); }
.btn-line:hover { background: var(--paper); }

/* ---------- header ---------- */
.header {
  position: fixed; inset: 0 0 auto; z-index: 60; height: var(--header-h);
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding: 0 40px;
  transition: background .3s, backdrop-filter .3s, border-color .3s; border-bottom: 1px solid transparent;
}
.header.scrolled { background: rgba(2, 9, 32, .78); backdrop-filter: blur(14px); border-color: rgba(255, 255, 255, .06); }
.logo { font-family: var(--font-en); font-size: 20px; font-weight: 700; letter-spacing: -.01em; text-decoration: none; color: #fff; white-space: nowrap; }
.logo b { color: var(--gold); font-weight: 700; }
.logo em { font-style: normal; font-family: var(--font); font-weight: 700; font-size: .86em; }
.gnb { display: flex; gap: 6px; }
.gnb-link {
  background: none; border: 0; padding: 8px 18px; font-family: var(--font-en); font-size: 15px; font-weight: 600;
  color: #fff; text-decoration: none; transition: color .2s; position: relative;
}
.gnb-link::after { content: ''; position: absolute; left: 18px; right: 18px; bottom: 2px; height: 2px; background: var(--gold); transform: scaleX(0); transition: transform .25s; }
.gnb-link:hover, .gnb-link.active { color: var(--gold-hi); }
.gnb-link.active::after { transform: scaleX(1); }
.gnb-mobile-only { display: none; }
.header-lookup { justify-self: end; }
.header-toggle { display: none; justify-self: end; width: 40px; height: 40px; background: none; border: 0; padding: 10px 8px; flex-direction: column; justify-content: space-between; }
.header-toggle span { display: block; height: 2px; background: #fff; border-radius: 2px; transition: transform .25s, opacity .25s; }
.header.open .header-toggle span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.header.open .header-toggle span:nth-child(2) { opacity: 0; }
.header.open .header-toggle span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- main visual ---------- */
.main-visual {
  position: relative; min-height: 100svh; overflow: hidden;
  display: flex; align-items: center; justify-content: center; padding: calc(var(--header-h) + 34px) 20px 130px;
  background: url('/assets/bg.webp') center / cover no-repeat, var(--navy-900);
}
.main-visual::after { content: ''; position: absolute; z-index: 1; inset: auto 0 0; height: 260px; background: linear-gradient(to bottom, transparent, var(--navy-950)); pointer-events: none; }
.mv-wave {
  position: absolute; z-index: 1; left: 50%; bottom: -34%; translate: -50% 0;
  width: min(1600px, 125vw); max-width: none; opacity: .95; pointer-events: none;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 12%, #000 88%, transparent 100%), linear-gradient(to bottom, transparent 0%, #000 10%, #000 72%, transparent 96%); -webkit-mask-composite: source-in;
  mask-image: linear-gradient(to right, transparent 0%, #000 12%, #000 88%, transparent 100%), linear-gradient(to bottom, transparent 0%, #000 10%, #000 72%, transparent 96%); mask-composite: intersect;
}
.mv-wave img, .deco-wave img { display: block; width: 100%; height: auto; max-width: none; }
.mv-wave { transform-origin: 55% 75%; animation: waveFlow 16s ease-in-out infinite; }
.deco-wave { transform-origin: 50% 50%; animation: waveFlow 22s ease-in-out infinite; }
.deco-right { animation-delay: -7s; }
.deco-bottom { animation-delay: -13s; }
@keyframes waveFlow {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg) scale(1, 1); }
  25%      { transform: translate3d(-14px, -8px, 0) rotate(-.8deg) scale(1.012, .992); }
  50%      { transform: translate3d(-4px, -16px, 0) rotate(.3deg) scale(1.02, 1.008); }
  75%      { transform: translate3d(12px, -6px, 0) rotate(.9deg) scale(1.008, .995); }
}
/* 빛이 금색 선을 따라 흐르는 효과 — 물결 그림 모양 그대로 마스크를 씌워 선 위에서만 빛남 */
.wave-light {
  position: absolute; inset: 0; pointer-events: none;
  -webkit-mask: url('/assets/wave.webp') center / 100% 100% no-repeat;
  mask: url('/assets/wave.webp') center / 100% 100% no-repeat;
  background: linear-gradient(110deg, transparent 40%, rgba(255, 236, 190, 0) 43%, rgba(255, 244, 214, .9) 49%, #fff 50%, rgba(255, 244, 214, .9) 51%, rgba(255, 236, 190, 0) 57%, transparent 60%) no-repeat;
  background-size: 300% 100%;
  mix-blend-mode: screen; mix-blend-mode: plus-lighter;
  animation: lightSweep 11s cubic-bezier(.45, .05, .55, .95) infinite;
}
.wave-light::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(70deg, transparent 38%, rgba(243, 226, 169, .55) 50%, transparent 62%) no-repeat;
  background-size: 260% 100%;
  animation: lightSweepBack 15s ease-in-out 3s infinite;
}
@keyframes lightSweep { 0% { background-position: 100% 0; } 70%, 100% { background-position: 0% 0; } }
@keyframes lightSweepBack { 0% { background-position: 0% 0; } 75%, 100% { background-position: 100% 0; } }
@keyframes glitterTwinkle { 0%, 100% { opacity: .5; } 50% { opacity: 1; } }
.mv-inner { position: relative; z-index: 2; width: min(820px, 100%); display: flex; flex-direction: column; align-items: center; text-align: center; }
.mv-heading { margin: 0; display: flex; flex-direction: column; align-items: center; width: 100%; font-size: inherit; }
.mv-date { width: min(470px, 86%); margin-bottom: clamp(26px, 5vh, 56px); }
.mv-year { width: min(340px, 62%); }
.mv-af { width: min(780px, 96%); margin-top: 12px; }
.mv-slogan-img { width: min(290px, 62%); margin-top: 26px; }
.mv-line { width: min(360px, 72%); margin-top: 20px; }
.mv-events { list-style: none; margin: 20px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, auto); justify-content: center; }
.mv-events li { padding: 0 26px; }
.mv-events span, .mv-events b { text-shadow: 0 1px 10px rgba(2, 9, 32, .9), 0 0 2px rgba(2, 9, 32, .8); }
.mv-events li + li { border-left: 1px solid rgba(216, 185, 104, .35); }
.mv-events span { display: block; font-family: var(--font-en); font-size: 15px; font-weight: 600; letter-spacing: .03em; color: var(--gold-hi); }
.mv-events b { display: block; margin-top: 2px; font-size: 16.5px; font-weight: 600; color: #fff; }
.mv-host { position: absolute; z-index: 3; left: 50%; bottom: 30px; translate: -50% 0; width: min(560px, 88vw); }
.mv-title {
  display: block; margin: 12px 0 0; font-family: var(--font-en); font-weight: 600; font-size: clamp(44px, 9vw, 104px); line-height: 1; letter-spacing: -.02em;
  background: linear-gradient(180deg, #fff 10%, #cfd2db 55%, #8e94a4 100%); -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 4px 20px rgba(0, 0, 0, .35));
}
.mv-glitter { width: 100%; margin-top: -14px; opacity: .85; mix-blend-mode: screen; animation: glitterTwinkle 5s ease-in-out infinite; }
.mv-kr { width: min(500px, 82%); margin-top: 16px; }
.mv-slogan { margin: 22px 0 0; font-size: clamp(16px, 2vw, 19px); font-weight: 500; color: #fff; }
.mv-slogan .en { display: block; margin-bottom: 4px; font-family: var(--font-en); font-size: 1.12em; font-weight: 600; font-style: italic; color: var(--gold-hi); letter-spacing: .02em; }
.mv-info { margin: 34px 0 0; display: grid; gap: 10px; justify-items: center; }
.mv-info div { display: flex; align-items: center; gap: 14px; }
.mv-info dt { padding: 3px 14px; border-radius: 999px; background: rgba(216, 185, 104, .16); border: 1px solid rgba(216, 185, 104, .55); color: var(--gold-hi); font-size: 13px; font-weight: 700; }
.mv-info dd { margin: 0; font-size: 16px; color: #fff; }
.cta {
  margin-top: 28px; padding: 15px 46px; border-radius: 999px; border: 1px solid rgba(243, 226, 169, .8);
  background: linear-gradient(135deg, rgba(243, 226, 169, .95), var(--gold) 50%, var(--gold-lo));
  color: var(--navy-900); font-size: 17px; font-weight: 700; box-shadow: 0 10px 30px rgba(216, 185, 104, .3);
  transition: transform .2s, box-shadow .2s;
}
.cta:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(216, 185, 104, .42); }
.cta.closed { background: rgba(255, 255, 255, .08); color: var(--dim); border-color: rgba(255, 255, 255, .25); box-shadow: none; }
.mv-scroll { position: absolute; z-index: 3; bottom: 34px; left: 50%; transform: translateX(-50%); width: 26px; height: 42px; border: 2px solid rgba(255, 255, 255, .5); border-radius: 14px; }
.mv-scroll span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: #fff; animation: wheel 1.8s ease-in-out infinite; }
@keyframes wheel { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(12px); } }

/* ---------- background wave objects ---------- */
.invite, .program, .location { position: relative; overflow: hidden; }
.invite > .wrap, .program > .wrap, .location > .wrap { position: relative; z-index: 1; }
.deco-wave {
  position: absolute; z-index: 0; max-width: none; pointer-events: none; opacity: .32;
  -webkit-mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, #000 40%, transparent 100%);
  mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, #000 40%, transparent 100%);
}
.deco-wave .wave-light { animation-duration: 18s; }
.deco-right .wave-light { animation-delay: 5s; }
.deco-bottom .wave-light { animation-delay: 10s; }
.deco-left { width: 1100px; left: -380px; top: 50%; translate: 0 -50%; scale: -1 1; }
.deco-right { width: 1200px; right: -460px; top: 8%; opacity: .22; }
.deco-bottom { width: 1300px; left: 50%; bottom: -200px; translate: -50% 0; opacity: .2; }

/* ---------- invitation ---------- */
.invite { padding: 120px 0 130px; text-align: center; }
.invite-title { margin: 0 0 40px; font-size: clamp(26px, 3.6vw, 40px); font-weight: 700; color: #fff; letter-spacing: -.02em; line-height: 1.35; }
.invite-body p { margin: 0 0 22px; font-size: 17px; line-height: 1.9; color: var(--dim); }
.invite-body b { color: #fff; font-weight: 600; }
.invite-body em { font-style: normal; color: var(--gold-hi); font-weight: 600; }
.host-logos { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 14px 30px; }
.host-logos .logo-all { width: min(560px, 100%); height: auto; }
.host-logos .logo-host { width: auto; height: 40px; }
.host-logos .logo-hanlim { width: auto; height: 28px; }
.invite-host { margin: 48px auto 0; opacity: .9; }

/* ---------- section common ---------- */
.section-title { margin: 0; text-align: center; font-family: var(--font-en); font-size: clamp(38px, 5vw, 56px); font-weight: 700; color: #fff; letter-spacing: -.02em; }
.section-sub { margin: 10px 0 50px; text-align: center; color: var(--dim); }

/* ---------- program / timetable ---------- */
.program { padding: 110px 0 120px; background: linear-gradient(180deg, var(--navy-950), var(--navy-900) 45%, var(--navy-950)); }
.tt-tabs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; max-width: 920px; margin: 0 auto 18px; }
.tt-tab {
  display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 14px 10px; border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, .12); background: rgba(255, 255, 255, .03); color: var(--dim); font-size: 16px; font-weight: 700;
  transition: all .2s;
}
.tt-tab small { font-family: var(--font-en); font-size: 11px; letter-spacing: .14em; color: #8fb6ff; font-weight: 700; }
.tt-tab-award small { color: var(--gold); }
.tt-tab:hover { color: #fff; border-color: rgba(255, 255, 255, .3); }
.tt-tab.active { color: #fff; background: linear-gradient(180deg, rgba(31, 95, 191, .45), rgba(31, 95, 191, .15)); border-color: rgba(143, 182, 255, .6); }
.tt-tab-award.active { background: linear-gradient(180deg, rgba(216, 185, 104, .32), rgba(216, 185, 104, .08)); border-color: rgba(216, 185, 104, .7); }
.tt-panel { max-width: 920px; margin: 0 auto; border-radius: 18px; overflow: hidden; background: rgba(2, 9, 32, .55); border: 1px solid rgba(255, 255, 255, .07); }
.tt-panel:not(.reveal) { animation: reveal .3s ease; }
.tt-head { padding: 32px 28px 26px; text-align: center; background: linear-gradient(180deg, rgba(31, 95, 191, .22), rgba(31, 95, 191, .04)); border-bottom: 1px solid rgba(255, 255, 255, .06); }
.tt-award .tt-head { background: linear-gradient(180deg, rgba(216, 185, 104, .2), rgba(216, 185, 104, .03)); }
.tt-part { font-family: var(--font-en); font-size: 12px; font-weight: 700; letter-spacing: .12em; color: #8fb6ff; }
.tt-award .tt-part { color: var(--gold); }
.tt-head h3 { margin: 8px 0 6px; font-size: clamp(22px, 2.8vw, 28px); color: #fff; }
.tt-desc { margin: 0; color: var(--dim); font-size: 14px; }
.tt-meta { list-style: none; margin: 16px 0 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.tt-meta li { padding: 4px 14px; border-radius: 999px; font-size: 13px; color: #fff; background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .1); }
.tt-meta li:first-child { font-family: var(--font-en); font-weight: 600; letter-spacing: .02em; }
.tt-meta .meal { color: var(--gold-hi); border-color: rgba(216, 185, 104, .45); }
.sched { list-style: none; margin: 0; padding: 6px 28px 18px; }
.sched > li { display: grid; grid-template-columns: 150px 1fr; gap: 18px; padding: 18px 4px; border-bottom: 1px solid rgba(255, 255, 255, .06); }
.sched > li:last-child { border-bottom: 0; }
.sched time { font-family: var(--font-en); font-size: 15px; font-weight: 600; color: #8fb6ff; letter-spacing: .02em; padding-top: 1px; white-space: nowrap; }
.tt-award .sched time { color: var(--gold-hi); }
.sched b { display: block; font-size: 17px; color: #fff; font-weight: 700; }
.sched p { margin: 4px 0 0; font-size: 14.5px; color: var(--dim); }
.sched .is-break, .sched .is-light { padding-top: 12px; padding-bottom: 12px; }
.sched .is-break b, .sched .is-light b { font-size: 15px; font-weight: 600; color: var(--dim); }
.sched .is-break { background: rgba(255, 255, 255, .025); margin: 0 -28px; padding-left: 32px; padding-right: 32px; }
.sched .is-key b, .sched .is-meal b { color: var(--gold-hi); }
.parallel { list-style: none; margin: 12px 0 0; padding: 12px 14px; border-radius: 10px; background: rgba(255, 255, 255, .035); display: grid; gap: 6px; font-size: 14px; color: var(--dim); }
.parallel span { display: inline-block; min-width: 76px; margin-right: 8px; font-size: 12px; font-weight: 700; color: #b9d1ff; }
.acad-kv {
  position: relative; height: 300px; overflow: hidden; display: flex; align-items: center; justify-content: center;
  background: url('/assets/acad-bg.webp') center / cover no-repeat, var(--navy-900);
}
.acad-kv-wave {
  position: absolute; left: 50%; top: 50%; translate: -50% -30%; width: 120%; max-width: none; opacity: .9; pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 25%, #000 70%, transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 0%, #000 25%, #000 70%, transparent 100%);
}
.acad-kv-title { position: relative; display: flex; flex-direction: column; align-items: center; gap: 10px; width: min(400px, 78%); }
.acad-kv-title .k-year { width: 48%; }
.acad-kv-title .k-name { width: 100%; }
.acad-kv-title .k-forum { width: 74%; }
.tt-academy .tt-part, .tt-academy .tt-head h3 { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.tt-foot { text-align: center; margin: 22px 0 0; font-size: 14px; color: var(--ink-3); }
.cohost { margin: 14px 0 0; font-size: 13px; color: var(--dim); }
.cohost b { color: #fff; font-weight: 600; }

/* ---------- location ---------- */
.location { padding: 110px 0 130px; }
.loc-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 40px; margin-top: 50px; align-items: stretch; }
.loc-map { border-radius: 18px; overflow: hidden; min-height: 420px; background: var(--navy-850); border: 1px solid rgba(255, 255, 255, .08); }
.loc-map iframe { width: 100%; height: 100%; min-height: 420px; border: 0; display: block; filter: saturate(.85); }
.loc-info dl { margin: 0 0 26px; }
.loc-info dl > div { display: grid; grid-template-columns: 76px 1fr; gap: 16px; padding: 20px 0; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.loc-info dl > div:first-child { padding-top: 0; }
.loc-info dt { font-weight: 700; color: var(--gold); }
.loc-info dd { margin: 0; color: #fff; }
.loc-info dd p { margin: 0 0 2px; color: var(--dim); font-size: 15px; }
.loc-info .loc-sub { margin-top: 10px; color: #fff; font-weight: 600; }
.loc-info .loc-sub:first-child { margin-top: 0; }
.loc-hl { color: var(--gold-hi); font-weight: 600; }
.loc-rooms { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: 15px; color: var(--dim); }
.loc-rooms b { display: inline-block; min-width: 200px; color: #fff; font-weight: 600; }

/* ---------- footer ---------- */
.footer { padding: 44px 0 56px; border-top: 1px solid rgba(255, 255, 255, .06); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.footer .host-logos { justify-content: flex-start; opacity: .8; }
.footer .host-logos img { height: 32px; }
.footer .host-logos .logo-all { width: min(440px, 100%); height: auto; }
.footer .host-logos .logo-hanlim { height: 22px; }
.footer p { margin: 0; font-size: 13px; color: rgba(230, 232, 238, .55); text-align: right; }
.footer .copy { margin-top: 4px; font-size: 12px; color: rgba(230, 232, 238, .35); }

/* ---------- floating register ---------- */
.btn-float {
  position: fixed; z-index: 55; right: 32px; bottom: 32px; width: 124px; height: 124px; border-radius: 50%; border: 0; padding: 0;
  background: radial-gradient(circle at 35% 30%, #2a64c6, var(--navy-800) 70%); box-shadow: 0 12px 34px rgba(0, 0, 0, .45), inset 0 0 0 1px rgba(216, 185, 104, .45);
  display: grid; place-items: center; transition: transform .25s, opacity .3s;
}
.btn-float:hover { transform: scale(1.06); }
.btn-float__ring { position: absolute; inset: 0; width: 100%; height: 100%; animation: spin 16s linear infinite; }
.btn-float__ring text { font-family: var(--font-en); font-size: 9.6px; font-weight: 600; letter-spacing: .14em; fill: var(--gold-hi); }
@keyframes spin { to { transform: rotate(360deg); } }
.btn-float__text { position: relative; font-size: 14px; font-weight: 700; line-height: 1.3; color: #fff; }
.btn-float.closed { background: radial-gradient(circle at 35% 30%, #3a4566, #141c33 70%); }
.btn-float.closed .btn-float__text { font-size: 12px; color: var(--dim); }
.btn-float.hide, .btn-float.at-top { opacity: 0; pointer-events: none; transform: translateY(20px); }

/* ---------- register sheet (full screen) ---------- */
.sheet {
  width: 100vw; max-width: 100vw; height: 100svh; max-height: 100svh; margin: 0; padding: 0; border: 0;
  background: var(--paper); color: var(--ink); overflow-y: auto; overscroll-behavior: contain;
}
.sheet[open] { animation: sheetIn .35s ease; }
@keyframes sheetIn { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }
.sheet::backdrop { background: rgba(2, 9, 32, .8); }
.sheet-inner { max-width: 760px; margin: 0 auto; padding: 0 24px 80px; }
.sheet-head { position: sticky; top: 0; z-index: 5; display: flex; justify-content: space-between; align-items: flex-end; padding: 34px 0 18px; background: linear-gradient(var(--paper) 80%, rgba(246, 247, 251, 0)); }
.sheet-head h2 { margin: 2px 0 0; font-size: 30px; color: var(--navy-900); letter-spacing: -.02em; }
.sheet-close { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line); background: #fff; font-size: 26px; line-height: 1; color: var(--ink-2); }
.sheet-close:hover { background: var(--navy-800); color: #fff; }
.sheet-lead { margin: 0 0 22px; color: var(--ink-2); font-size: 15px; }
.eyebrow { margin: 0; font-family: var(--font-en); font-size: 12px; font-weight: 700; letter-spacing: .22em; color: var(--gold-lo); }

/* ---------- form ---------- */
.form { background: #fff; border-radius: 18px; padding: 8px 36px 36px; box-shadow: 0 10px 40px rgba(11, 29, 77, .08); border: 1px solid var(--line); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.block { border: 0; padding: 28px 0 6px; margin: 0; border-bottom: 1px solid var(--line); }
.block:last-of-type { border-bottom: 0; }
.block legend { display: flex; align-items: center; gap: 10px; padding: 0; margin-bottom: 18px; font-size: 19px; font-weight: 700; color: var(--navy-800); float: left; width: 100%; }
.block legend + * { clear: both; }
.step { font-family: var(--font-en); font-size: 12px; font-weight: 700; color: var(--gold-lo); border: 1px solid var(--gold); border-radius: 6px; padding: 2px 7px; }
.field { margin-bottom: 22px; }
.field > label, .field > .label { display: block; margin-bottom: 8px; font-size: 15px; font-weight: 600; color: var(--ink); }
.field i { font-style: normal; color: var(--danger); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
/* 소속·세부 소속·직위 — 개인 참가자는 전공·관심 분야(필수)를 맨 위로 */
.org-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.org-fields .f-position, .org-fields .personal-hint { grid-column: 1 / -1; }
.org-fields .personal-hint { margin: 0 0 14px; }
.org-fields.personal > .field { grid-column: 1 / -1; }
.org-fields.personal .f-dept { order: -1; }
.org-fields.personal .personal-hint { order: -2; }
input[type=text], input[type=email], input[type=tel] {
  width: 100%; padding: 13px 14px; font: inherit; font-size: 16px; color: var(--ink);
  border: 1px solid #cfd5e2; border-radius: 10px; background: #fff; transition: border-color .15s, box-shadow .15s;
}
input:focus { outline: 0; border-color: var(--navy-700); box-shadow: 0 0 0 3px rgba(19, 48, 110, .12); }
input::placeholder { color: #a5acbb; }
.etc-input { margin-top: 10px; }
.hint { margin: 8px 0 0; font-size: 13px; color: var(--ink-3); }
.block > .hint { margin: -6px 0 20px; padding: 12px 14px; border-radius: 10px; background: #fbf6e8; color: #7a5d1d; border-left: 0; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips label { position: relative; }
.chips input { position: absolute; opacity: 0; inset: 0; }
.chips span { display: inline-block; padding: 9px 15px; border-radius: 999px; border: 1px solid #cfd5e2; font-size: 14px; color: var(--ink-2); cursor: pointer; transition: all .15s; }
.chips input:checked + span { background: var(--navy-800); border-color: var(--navy-800); color: #fff; }
.chips input:focus-visible + span { box-shadow: 0 0 0 3px rgba(19, 48, 110, .25); }

.options { display: flex; gap: 10px; flex-wrap: wrap; }
.options-col { flex-direction: column; }
.opt { position: relative; display: block; flex: 1; min-width: 130px; }
.opt input { position: absolute; opacity: 0; }
.opt > span { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 15px 18px 15px 46px; border: 1px solid #cfd5e2; border-radius: 12px; cursor: pointer; transition: all .15s; position: relative; }
.opt > span::before { content: ''; position: absolute; left: 17px; top: 50%; width: 18px; height: 18px; margin-top: -9px; border-radius: 50%; border: 2px solid #b9c0cf; background: #fff; transition: all .15s; }
.opt b { font-weight: 600; font-size: 15px; }
.opt small { font-size: 13px; color: var(--ink-3); text-align: right; }
.opt input:checked + span { border-color: var(--navy-800); background: #f2f5fc; box-shadow: inset 0 0 0 1px var(--navy-800); }
.opt input:checked + span::before { border-color: var(--navy-800); background: radial-gradient(circle, var(--navy-800) 0 4px, #fff 5px); }
.opt input:focus-visible + span { box-shadow: 0 0 0 3px rgba(19, 48, 110, .25); }
.opt-sm { flex: 0 1 180px; }
.opt-stack > span { flex-direction: column; align-items: flex-start; gap: 2px; }
.opt-check > span::before { border-radius: 5px; }
.opt-check input:checked + span::before {
  border-color: var(--navy-800);
  background: var(--navy-800) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.2 6.4l2.4 2.4L9.8 3.4' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 12px no-repeat;
}
.ev-list > .opt { margin-bottom: 10px; }
.prog-list > .opt { margin-bottom: 8px; }
.sub-hint { margin: -2px 0 10px; }
.ev-list > .sub-group { margin-top: -2px; margin-bottom: 14px; }
.sub-group { margin: 0 0 4px 14px; padding: 14px 0 2px 18px; border-left: 2px solid var(--gold); animation: reveal .25s ease; }
.sub-group .field { margin-bottom: 16px; }
.sub-group .field > .label { font-size: 14.5px; }
.sub-group > .hint { margin: 0 0 12px; padding: 12px 14px; border-radius: 10px; background: #fbf6e8; color: #7a5d1d; }
.opt-stack small { text-align: left; line-height: 1.5; }
.lbl-sub { margin-left: 6px; font-size: 13px; font-weight: 500; color: var(--ink-3); }
.field.branch { animation: reveal .25s ease; padding-left: 16px; border-left: 2px solid var(--gold); }
@keyframes reveal { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }

.terms { max-height: 150px; overflow: auto; padding: 14px 16px; margin-bottom: 12px; border-radius: 10px; background: var(--paper); border: 1px solid var(--line); font-size: 13px; color: var(--ink-2); line-height: 1.65; }
.terms p { margin: 0 0 6px; }
.terms b { color: var(--ink); }
.terms-short { max-height: none; }
.check, .field > label.check { display: inline-flex; width: auto; margin-bottom: 0; align-items: center; gap: 10px; cursor: pointer; font-weight: 600; }
.check input { width: 20px; height: 20px; accent-color: var(--navy-800); }

.field.invalid input[type=text], .field.invalid input[type=email], .field.invalid input[type=tel] { border-color: var(--danger); }
.field.invalid .opt > span, .field.invalid .chips span { border-color: rgba(214, 69, 93, .55); }
.err { margin: 6px 0 0; font-size: 13px; color: var(--danger); }
.form-error { padding: 12px 16px; border-radius: 10px; background: #fdecef; color: #a3253b; font-size: 14px; margin: 20px 0 0; }
.btn-submit { width: 100%; margin-top: 26px; padding: 18px; font-size: 17px; font-weight: 700; border: 0; border-radius: 12px; background: linear-gradient(135deg, var(--navy-700), var(--navy-900)); color: #fff; box-shadow: 0 10px 26px rgba(6, 20, 58, .25); }
.btn-submit:hover { filter: brightness(1.15); }
.btn-submit:disabled { opacity: .6; cursor: not-allowed; }

/* ---------- modal ---------- */
.modal { border: 0; padding: 0; border-radius: 20px; width: min(480px, calc(100vw - 32px)); max-height: calc(100svh - 32px); color: var(--ink); box-shadow: 0 30px 90px rgba(0, 0, 0, .5); }
.modal::backdrop { background: rgba(2, 9, 32, .72); backdrop-filter: blur(4px); }
.modal-body { padding: 34px 30px 28px; }
.modal h3 { margin: 0 0 8px; font-size: 22px; color: var(--navy-900); line-height: 1.4; }
.muted { color: var(--ink-3); font-size: 14px; margin: 0 0 18px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 22px; }
.done { text-align: center; }
.done .modal-actions { justify-content: center; }
.qr { margin: 18px auto 6px; width: 200px; height: 200px; border: 1px solid var(--line); border-radius: 12px; padding: 8px; background: #fff; }
.code { font-family: var(--font-en); font-weight: 700; letter-spacing: .08em; color: var(--navy-800); margin: 0 0 12px; }
.summary { width: 100%; border-collapse: collapse; text-align: left; font-size: 14px; border-top: 2px solid var(--navy-800); }
.summary th, .summary td { padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.summary th { width: 112px; color: var(--navy-800); background: var(--paper); font-weight: 600; }

/* 마감 팝업 */
.notice { width: min(440px, calc(100vw - 32px)); overflow: hidden; }
.notice-body { padding: 54px 32px 46px; text-align: center; color: #fff; background: linear-gradient(180deg, var(--navy-900) 0%, var(--navy-800) 55%, #0d4f8f 100%); }
.notice-body h3 { margin: 0 0 24px; font-size: 30px; line-height: 1.35; color: #fff; }
.notice-body p { margin: 0; font-size: 16px; line-height: 1.8; color: rgba(255, 255, 255, .85); white-space: pre-line; }
.notice-foot { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; background: var(--paper); }
.check-sm { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-2); cursor: pointer; }
.check-sm input { width: 16px; height: 16px; accent-color: var(--navy-800); }

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .header { padding: 0 24px; }
  .gnb-link { padding: 8px 12px; }
  .loc-grid { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  :root { --header-h: 62px; }
  .header { grid-template-columns: 1fr auto; padding: 0 16px; }
  .header-lookup { display: none; }
  .header-toggle { display: flex; }
  .gnb {
    position: fixed; top: var(--header-h); left: 0; right: 0; flex-direction: column; gap: 0; padding: 10px 16px 22px;
    background: rgba(2, 9, 32, .97); border-bottom: 1px solid rgba(255, 255, 255, .08);
    opacity: 0; visibility: hidden; transform: translateY(-8px); transition: all .25s;
  }
  .header.open { background: rgba(2, 9, 32, .97); }
  .header.open .gnb { opacity: 1; visibility: visible; transform: none; }
  .gnb-link { text-align: left; padding: 14px 4px; font-size: 17px; border-bottom: 1px solid rgba(255, 255, 255, .06); }
  .gnb-link::after { display: none; }
  .gnb-mobile-only { display: block; font-family: var(--font); }
}
@media (max-width: 640px) {
  .deco-left { width: 700px; left: -380px; }
  .deco-right, .deco-bottom { width: 800px; }
  .br-m { display: inline; }
  .br-d { display: none; }
  .main-visual { padding-bottom: 110px; }
  .mv-scroll { display: none; }
  .mv-host { width: 92vw; bottom: 22px; }
  .mv-events { grid-template-columns: 1fr; gap: 12px; }
  .mv-events li { padding: 0; }
  .mv-events li + li { border-left: 0; }
  .mv-events b { font-size: 15px; }
  .acad-kv { height: 210px; }
  .mv-wave { width: 240vw; bottom: -6%; opacity: .9; }
  .mv-info div { flex-direction: column; gap: 6px; }
  .mv-info dd { font-size: 15px; }
  .invite { padding: 90px 0 100px; }
  .invite-body p { font-size: 15.5px; line-height: 1.85; }
  .program, .location { padding: 80px 0 90px; }
  .tt-tabs { grid-template-columns: 1fr 1fr; }
  .tt-tab { font-size: 15px; padding: 12px 8px; }
  .tt-head { padding: 26px 18px 22px; }
  .sched { padding: 4px 18px 12px; }
  .sched > li { grid-template-columns: 1fr; gap: 4px; padding: 16px 0; }
  .sched .is-break { margin: 0 -18px; padding-left: 18px; padding-right: 18px; }
  .sched time { font-size: 14px; }
  .logo { display: flex; flex-direction: column; font-size: 15px; line-height: 1.2; }
  .logo .l1 { font-size: 12px; }
  .loc-map, .loc-map iframe { min-height: 300px; }
  .loc-info dl > div { grid-template-columns: 1fr; gap: 8px; }
  .loc-rooms b { display: block; min-width: 0; }
  .footer p { text-align: left; }
  .host-logos .logo-host { height: 30px; }
  .host-logos .logo-hanlim { height: 22px; }
  .footer .host-logos img { height: 26px; }
  .footer .host-logos .logo-hanlim { height: 18px; }
  .btn-float { width: 96px; height: 96px; right: 16px; bottom: 16px; }
  .btn-float__text { font-size: 12.5px; }
  .sheet-inner { padding: 0 14px 60px; }
  .sheet-head { padding-top: 22px; }
  .sheet-head h2 { font-size: 24px; }
  .form { padding: 4px 18px 24px; border-radius: 14px; }
  .grid-2, .org-fields { grid-template-columns: 1fr; }
  .opt-sm { flex: 1 1 0; min-width: 0; }
}
@media (max-width: 420px) {
  .opt > span { flex-direction: column; align-items: flex-start; gap: 0; }
  .opt small { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mv-glitter, .btn-float__ring, .mv-scroll span { animation: none; }
  .wave-light { display: none; }
  .mv-wave, .deco-wave { animation: none; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}