/* Faithful layout; colors drawn from the conference's official poster. */
@font-face {
  font-family: "Pretendard Variable";
  src: url("/fonts/PretendardVariable.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}
:root {
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-8: 64px;
  --bg: #fff;
  --surface: #f1f5ee;
  --surface-strong: #e3ebdd;
  --line: #dfe8dc;
  --line-strong: #bdcdbb;
  --ink: #091d1b;
  --text: #253e38;
  --muted: #52675c;
  --rubric: #235b47;
  --poster-lime: #e1f28a;
  --focus: #235b47;
  --radius: 8px;
  --gutter: 24px;
  --sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; letter-spacing: 0; }
html { scrollbar-gutter: stable; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; font: 16px/1.5 var(--sans); color: var(--ink); background: var(--bg); overflow-wrap: break-word; -webkit-font-smoothing: antialiased; font-synthesis: none; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-weight: 700; word-break: keep-all; overflow-wrap: anywhere; }
h1 { font-size: 32px; line-height: 40px; }
h2 { font-size: 22px; line-height: 32px; }
h3 { font-size: 18px; line-height: 28px; }
p { word-break: keep-all; overflow-wrap: anywhere; }
a { color: inherit; text-underline-offset: 4px; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; touch-action: manipulation; }
button:disabled { cursor: not-allowed; opacity: .4; }
button, a, input, textarea, select, summary { touch-action: manipulation; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip { position: fixed; top: -96px; left: 16px; z-index: 60; padding: 16px; background: var(--ink); color: #fff; border-radius: var(--radius); }
.skip:focus { top: 16px; }
.site-header { border-bottom: 1px solid var(--ink); background: var(--ink); color: #fff; }
.site-header :focus-visible { outline-color: var(--poster-lime); }
.header-inner { max-width: 1280px; min-height: 56px; padding: 0 40px; margin: auto; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.site-name { display: inline-flex; align-items: center; min-height: 48px; font-size: 17px; font-weight: 700; text-decoration: none; white-space: nowrap; color: var(--poster-lime); }
.header-inner nav { display: flex; gap: 16px; }
.header-inner nav a { display: inline-flex; align-items: center; min-height: 48px; font-size: 15px; font-weight: 600; text-decoration: none; color: #fff; }
.header-inner nav a:hover { text-decoration: underline; }
.participant-main { width: min(752px,100%); padding: 40px var(--gutter) 64px; margin: auto; }
.page-heading { margin-bottom: 40px; }
.page-heading h1 { margin: 8px 0 16px; }
.page-label, .section-label { font-size: 14px; line-height: 24px; font-weight: 600; color: var(--muted); }
.muted { font-size: 14px; line-height: 24px; color: var(--muted); }
.paper-list { margin-top: 16px; }
.paper-row { display: flex; gap: 24px; align-items: center; justify-content: space-between; padding: 24px 0; border-top: 1px solid var(--line); }
.paper-row:first-child { border-top-color: var(--ink); }
.paper-author { font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 8px; }
.paper-row h3 { font-size: 18px; line-height: 28px; }
.paper-link, .paper-pending { flex-shrink: 0; min-height: 48px; display: inline-flex; align-items: center; font-size: 14px; }
.paper-pending { color: var(--muted); }
.question-section { margin-top: 48px; }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 16px; }
label { font-size: 15px; font-weight: 600; }
select, textarea, input:not([type]), input[type=search] { width: 100%; max-width: 100%; background: var(--surface); border: 1px solid transparent; border-radius: var(--radius); padding: 12px 16px; min-height: 48px; line-height: 24px; }
select { font-size: 15px; text-overflow: ellipsis; }
textarea { display: block; resize: vertical; min-height: 160px; font-size: 17px; line-height: 28px; }
textarea::placeholder, input::placeholder { color: var(--muted); }
#speaker { margin-top: 8px; }
.field-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin: 24px 0 8px; }
.field-help { color: var(--muted); font-size: 13px; line-height: 24px; margin-top: 8px; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 48px; padding: 0 24px; background: var(--surface); border: 0; border-radius: var(--radius); font-size: 15px; font-weight: 600; text-decoration: none; }
.button:hover { background: var(--surface-strong); }
.button.primary { color: #fff; background: var(--ink); }
.button.primary:hover { background: #235b47; }
#submit { margin-top: 24px; }
.text-button { min-height: 40px; padding: 8px 0; border: 0; background: transparent; font-size: 13px; font-weight: 600; text-decoration: none; }
.text-button:hover { text-decoration: underline; text-underline-offset: 4px; }
.text-button[aria-pressed=true] { color: var(--rubric); }
.notice { margin: 16px 0; padding: 16px; background: var(--surface); border-radius: var(--radius); font-size: 14px; line-height: 24px; }
.notice.error, .notice.is-error, .warning { color: #84421e; }
.demo-note { display: inline-flex; align-items: center; gap: 16px; font-size: 13px; line-height: 24px; color: var(--muted); }
.page-heading .demo-note { margin-top: 8px; }
.success { padding: 32px 0; }
.success .muted { margin: 8px 0 24px; }
.site-footer { width: min(1200px,calc(100% - 48px)); margin: auto; padding: 24px 0; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; font-size: 13px; color: var(--muted); }
.admin-main { max-width: 1280px; padding: 40px 40px 24px; margin: auto; }
.admin-heading { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 24px; }
.admin-heading h1 { margin-bottom: 8px; }
.toolbar { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.toolbar a { font-size: 13px; font-weight: 600; }
.admin-main>.demo-note { margin-bottom: 16px; }
.moderator-layout { display: grid; grid-template-columns: 160px minmax(0,1fr); gap: 40px; margin-top: 32px; }
.session-rail .section-label { margin-bottom: 16px; }
#session-nav { display: flex; flex-direction: column; gap: 8px; }
#session-nav button { display: flex; justify-content: space-between; gap: 16px; align-items: center; min-height: 48px; padding: 8px 16px; border: 0; border-radius: var(--radius); background: var(--surface); text-align: left; font-size: 15px; font-weight: 600; }
#session-nav button[aria-current=true] { color: white; background: var(--ink); }
.session-count { font-size: 13px; font-weight: 400; font-variant-numeric: tabular-nums; }
.moderator-content { min-width: 0; }
.session-heading { margin-bottom: 32px; }
.session-heading h2 { margin: 8px 0; font-size: 24px; line-height: 32px; }
.desk-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 32px; }
.inbox, .group-column { min-width: 0; }
.tabs { display: flex; gap: 16px; margin: 8px 0; flex-wrap: wrap; }
.tabs button { min-height: 40px; border: 0; background: transparent; font-size: 13px; color: var(--muted); padding: 8px 0; }
.tabs button[aria-pressed=true] { color: var(--ink); font-weight: 700; text-decoration: underline 2px var(--rubric); text-underline-offset: 8px; }
.selection-bar { display: flex; gap: 16px; justify-content: space-between; align-items: center; min-height: 40px; margin-bottom: 8px; font-size: 12px; color: var(--muted); }
.question-card { padding: 24px 0; border-top: 1px solid var(--line); }
.question-meta { display: flex; gap: 8px; align-items: center; justify-content: space-between; }
.question-select { display: flex; gap: 8px; align-items: center; font-size: 13px; font-weight: 500; color: var(--muted); cursor: pointer; }
input[type=checkbox] { width: 16px; height: 16px; margin: 0; accent-color: var(--ink); flex-shrink: 0; }
.question-text { font-size: 16px; line-height: 28px; color: var(--text); white-space: pre-wrap; margin-top: 16px; }
.question-actions, .group-actions { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; margin-top: 8px; }
.tag { font-size: 12px; color: var(--muted); background: var(--surface); padding: 4px 8px; border-radius: 4px; }
.group-column>.field-help { margin-top: -8px; margin-bottom: 16px; }
.group-card { padding: 24px; border-radius: 16px; background: var(--surface); margin-top: 16px; }
.group-card.chosen { box-shadow: inset 4px 0 0 var(--rubric); }
.group-card.is-discussed { opacity: .65; }
.group-card.unsaved { box-shadow: inset 3px 0 0 #9b5a24; }
.group-meta { display: flex; gap: 16px; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.group-meta .page-label, .group-meta .muted { font-size: 12px; }
.group-card input:not([type]) { padding: 8px 0; min-height: 40px; background: transparent; border-radius: 0; font-size: 18px; line-height: 28px; font-weight: 700; }
.group-card textarea { margin-top: 8px; background: white; min-height: 136px; font-size: 16px; line-height: 28px; }
.source-details { margin-top: 16px; font-size: 14px; }
.source-details summary { min-height: 40px; padding: 8px 0; cursor: pointer; font-weight: 600; }
.source-item { margin-top: 8px; padding: 16px; border-radius: var(--radius); background: white; }
.source-item p { font-size: 14px; line-height: 24px; margin-top: 8px; white-space: pre-wrap; }
.empty-message { padding: 32px 0; color: var(--muted); font-size: 14px; line-height: 24px; }
.qr-panel { display: flex; align-items: center; gap: 24px; padding: 24px; background: var(--surface); border-radius: 16px; margin: 16px 0; }
.qr-panel img { flex-shrink: 0; }
.qr-panel a { display: inline-flex; align-items: center; min-height: 48px; font-size: 14px; }
.locked-panel { max-width: 672px; margin: 48px auto; }
.locked-panel p { margin-top: 16px; }
.paper-management { margin-top: 64px; border-top: 1px solid var(--line); }
.paper-management>summary { padding: 24px 0; font-size: 20px; font-weight: 700; cursor: pointer; }
.paper-upload { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--line); }
.upload-form { display: grid; grid-template-columns: 1fr 1fr auto; gap: 16px; align-items: center; margin-top: 16px; }
.upload-form input[type=file] { min-width: 0; max-width: 100%; font-size: 13px; }
.upload-form input[type=file]::file-selector-button { min-height: 40px; border: 0; border-radius: var(--radius); padding: 8px 16px; margin-right: 8px; font: inherit; background: var(--surface); }
.paper-version { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; font-size: 14px; margin-top: 16px; }
.paper-version a { overflow-wrap: anywhere; }
.admin-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 48px; border-top: 1px solid var(--line); padding-top: 16px; }
@media(min-width:768px) { :root { --gutter: 40px; } }
@media(max-width:1050px) {
  .moderator-layout { grid-template-columns: 128px minmax(0,1fr); gap: 24px; }
  .desk-grid { gap: 24px; }
  .group-card { padding: 16px; }
  .admin-main { padding-inline: 24px; }
}
@media(max-width:767px) {
  .header-inner { padding: 0 24px; }
  .header-inner nav { gap: 16px; }
  .header-inner nav a { font-size: 13px; }
  .site-name { font-size: 16px; }
  .participant-main { padding-top: 32px; }
  h1 { font-size: 28px; line-height: 40px; }
  .page-heading { margin-bottom: 32px; }
  .page-label { font-size: 13px; }
  .paper-row { gap: 16px; }
  .paper-row h3 { font-size: 17px; line-height: 24px; }
  .paper-link, .paper-pending { font-size: 13px; }
  .question-section { margin-top: 40px; }
  .admin-main { padding-top: 32px; }
  .admin-heading { flex-direction: column; align-items: flex-start; gap: 16px; }
  .toolbar { gap: 16px; }
  .moderator-layout { display: block; margin-top: 24px; }
  .session-rail .section-label { display: none; }
  #session-nav { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 8px; }
  #session-nav button { padding: 8px; flex-direction: column; justify-content: center; gap: 0; font-size: 13px; }
  .session-heading { margin: 32px 0 24px; }
  .session-heading h2 { font-size: 22px; }
  .desk-grid { display: block; }
  .group-column { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--ink); }
  .upload-form { display: flex; flex-direction: column; align-items: stretch; }
  .upload-form input[type=file] { min-height: 48px; }
  .qr-panel { flex-direction: column; align-items: flex-start; }
  .qr-panel img { align-self: center; }
  .site-footer { font-size: 12px; }
}
@media(max-width:359px) {
  :root { --gutter: 16px; }
  .header-inner { padding-inline: 16px; }
  .header-inner nav { gap: 12px; }
  .admin-main { padding-inline: 16px; }
  .paper-row { display: block; padding: 16px 0; }
  .paper-link, .paper-pending { min-height: 40px; margin-top: 8px; }
  .tabs { gap: 12px; }
}
@media(prefers-reduced-motion:reduce) { html { scroll-behavior: auto; } }
@media print { .site-header,.toolbar,.session-rail,.question-actions,.group-actions,.paper-management,.admin-bottom { display:none; } .moderator-layout,.desk-grid { display:block; } .question-card,.group-card { break-inside:avoid; } .group-column { margin-top:32px; } }
.paper-brief { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--line); }
.paper-brief .group-card { margin-top: 12px; }

/* Participant reading and question flow uses the conference's 8px spacing scale. */
::selection { color: var(--ink); background: var(--poster-lime); }
textarea, input { caret-color: var(--rubric); }
.participant-page .header-inner { max-width: 1200px; padding-inline: var(--space-5); gap: var(--space-3); }
.participant-page .site-name { font-size: 16px; }
.participant-page .header-inner nav { gap: var(--space-3); }
.participant-main { width: min(848px,100%); padding: var(--space-6) var(--space-5) var(--space-8); }
.participant-page .page-heading { margin-bottom: var(--space-6); }
.participant-page .page-heading h1 { margin: 0; font-size: 28px; line-height: 40px; text-wrap: balance; }
.conference-theme { margin-top: var(--space-1); font-size: 20px; line-height: 32px; color: var(--rubric); font-weight: 600; }
.event-date { display: flex; flex-wrap: wrap; gap: 0 var(--space-2); margin-top: var(--space-2); font-size: 14px; line-height: 24px; color: var(--muted); font-variant-numeric: tabular-nums; }
.event-venue { display: flex; flex-wrap: wrap; gap: 0 var(--space-2); margin-top: var(--space-1); font-size: 14px; line-height: 24px; color: var(--muted); }
.event-venue span:first-child { color: var(--text); font-weight: 600; }
.participant-page h2 { font-size: 22px; line-height: 32px; }
.participant-page .paper-list { margin-top: var(--space-2); }
.participant-page .paper-row { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: var(--space-3); padding-block: var(--space-3); }
.participant-page .paper-row:last-child { border-bottom: 1px solid var(--line); }
.participant-page .paper-author { color: var(--rubric); font-size: 14px; line-height: 24px; margin-bottom: var(--space-1); }
.participant-page .paper-row h3 { font-size: 18px; line-height: 32px; }
.participant-page .paper-link { min-width: 104px; min-height: 48px; justify-content: center; padding: var(--space-1) var(--space-2); border: 1px solid var(--line-strong); border-radius: var(--radius); text-decoration: none; font-weight: 600; }
.participant-page .paper-link:hover { background: var(--surface); border-color: var(--rubric); }
.participant-page .paper-pending { min-width: 104px; justify-content: center; }
.participant-page .question-section { margin-top: var(--space-6); }
.participant-page .section-heading { align-items: center; gap: var(--space-2); margin-bottom: var(--space-3); }
.connection-status { flex-shrink: 0; font-size: 13px; line-height: 24px; color: var(--muted); }
.participant-page label { font-size: 15px; line-height: 24px; }
.participant-page select, .participant-page textarea { border-color: var(--line-strong); background: #fff; padding: var(--space-2); }
.participant-page select { min-height: 56px; font-size: 16px; line-height: 24px; }
.participant-page textarea { min-height: 192px; font-size: 16px; line-height: 32px; }
.participant-page .field-heading { margin: var(--space-3) 0 var(--space-1); }
.participant-page .field-help { font-size: 14px; line-height: 24px; }
.participant-page #char-count { font-variant-numeric: tabular-nums; }
.participant-page #submit { min-width: 160px; min-height: 56px; margin-top: var(--space-3); }
.participant-page .success { padding: var(--space-4); background: var(--surface); border-radius: var(--radius); }
.participant-page .site-footer { width: min(768px,calc(100% - 80px)); padding-block: var(--space-3); line-height: 24px; }
@media(max-width:600px) {
  .participant-page .header-inner { flex-wrap: wrap; padding: var(--space-1) var(--space-3); gap: 0 var(--space-2); }
  .participant-page .site-name { min-height: 40px; }
  .participant-page .header-inner nav { gap: var(--space-2); }
  .participant-page .header-inner nav a { min-height: 48px; font-size: 14px; }
  .participant-main { padding: var(--space-4) var(--space-3) var(--space-6); }
  .participant-page .page-heading { margin-bottom: var(--space-4); }
  .participant-page .page-heading h1 { font-size: 24px; line-height: 32px; }
  .conference-theme { font-size: 18px; line-height: 32px; }
  .participant-page .paper-row { grid-template-columns: minmax(0,1fr); gap: var(--space-2); }
  .participant-page .paper-row h3 { font-size: 18px; line-height: 32px; }
  .participant-page .paper-link { justify-self: start; }
  .participant-page .paper-pending { justify-content: flex-start; min-height: 24px; }
  .participant-page #submit { width: 100%; }
  .participant-page .site-footer { width: calc(100% - 48px); flex-wrap: wrap; gap: var(--space-1) var(--space-3); }
}
@media(max-width:359px) {
  .participant-page .header-inner { padding-inline: var(--space-2); }
  .participant-main { padding-inline: var(--space-2); }
  .participant-page .site-footer { width: calc(100% - 32px); }
}