:root{--ink:#101828;--muted:#667085;--faint:#98a2b3;--line:#e4e7ec;--surface:#fff;--soft:#f7f9fc;--page:#f4f7fb;--brand:#2457d6;--brand-strong:#173b95;--brand-soft:#eef4ff;--brand-border:#c7d7fe;--brand-border-strong:#9fb4ff;--brand-ring:#2457d624;--success:#15803d;--success-soft:#ecfdf3;--success-border:#bbf7d0;--danger:#b91c1c;--danger-soft:#fef2f2;--danger-border:#fecaca;--warning:#92400e;--warning-soft:#fffbeb;--warning-border:#fed7aa;--info-ink:#1e3a8a;--tone-blue:#2457d6;--tone-blue-border:#c7d7fe;--tone-blue-grad:linear-gradient(135deg, #2457d6, #38bdf8);--tone-green:#15803d;--tone-green-border:#bbf7d0;--tone-green-grad:linear-gradient(135deg, #15803d, #22c55e);--tone-purple:#7c3aed;--tone-purple-border:#ddd6fe;--tone-purple-grad:linear-gradient(135deg, #7c3aed, #ec4899);--tone-amber:#b45309;--tone-amber-border:#fed7aa;--tone-amber-grad:linear-gradient(135deg, #f59e0b, #ef4444);--tone-rose:#be185d;--tone-rose-border:#fbcfe8;--tone-rose-grad:linear-gradient(135deg, #db2777, #f472b6);--font-sans:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--w-medium:500;--w-semibold:600;--w-bold:700;--w-heavy:800;--r-sm:10px;--r-md:12px;--r-lg:16px;--r-xl:20px;--r-full:999px;--shadow-xs:0 1px 2px #1018280d;--shadow-sm:0 4px 12px #1018280f;--shadow-md:0 10px 30px #10182814;--shadow-lg:0 20px 60px #1018281f;--shadow-brand:0 10px 26px #2457d638;color:var(--ink);background:var(--page);font-family:var(--font-sans);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}*{box-sizing:border-box}body{min-width:320px;margin:0}button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.58}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.loading-screen{min-height:100dvh;color:var(--muted);font-weight:var(--w-semibold);align-content:center;place-items:center;gap:16px;display:grid}.spinner{border-radius:var(--r-full);border:3px solid var(--brand-border);border-top-color:var(--brand);width:34px;height:34px;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.participant-app{min-height:100dvh;padding-bottom:calc(48px + env(safe-area-inset-bottom))}.toast-stack{z-index:30;pointer-events:none;gap:10px;width:min(360px,100vw - 32px);display:grid;position:fixed;top:18px;right:18px}.toast{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);color:var(--ink);box-shadow:var(--shadow-lg);font-weight:var(--w-semibold);border-left-width:4px;padding:13px 15px;animation:.2s toast-in}.toast.success{border-color:var(--success-border);border-left-color:var(--success);background:var(--success-soft);color:var(--success)}.toast.error{border-color:var(--danger-border);border-left-color:var(--danger);background:var(--danger-soft);color:var(--danger)}.toast.info{border-color:var(--warning-border);background:var(--warning-soft);color:var(--warning);border-left-color:#d97706}@keyframes toast-in{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.app-header{-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#ffffffe0;border-bottom:1px solid #e4e7ece6;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:16px;min-height:92px;padding:16px max(18px,50vw - 560px);display:grid}.brand-pair{align-items:center;gap:10px;display:flex}.brand-divider{background:var(--line);width:1px;height:34px}.logo{width:48px;height:48px;color:var(--brand);font-weight:var(--w-heavy);place-items:center;display:grid;overflow:hidden}.logo img{object-fit:contain;width:100%;height:100%}.header-copy{min-width:0}.header-copy h1,.header-copy span{margin:0}.header-copy h1{font-size:clamp(20px,3.2vw,28px);font-weight:var(--w-bold);letter-spacing:-.015em;line-height:1.12}.header-copy span{color:var(--muted);font-size:13px;font-weight:var(--w-semibold);margin-top:5px;display:block}.home-view,.panel-view{width:min(1120px,100% - 32px);margin:22px auto 0}.event-intro{border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-md);padding:clamp(22px,5vw,44px)}.html-content{color:var(--ink);line-height:1.65}.html-content :first-child{margin-top:0}.html-content :last-child{margin-bottom:0}.action-grid{grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px;margin-top:18px;display:grid}.activity-tile{border:1px solid var(--line);border-radius:var(--r-xl);min-height:172px;color:var(--ink);text-align:left;box-shadow:var(--shadow-sm);background:linear-gradient(135deg,#fff 0%,#f8fbff 100%);align-content:space-between;gap:14px;padding:20px;transition:transform .16s,border-color .16s,box-shadow .16s;display:grid;position:relative;overflow:hidden}.activity-tile:after{content:"";border-radius:var(--r-full);opacity:.12;background:currentColor;width:92px;height:92px;position:absolute;top:-24px;right:-24px}.activity-tile:hover{border-color:var(--brand-border);box-shadow:var(--shadow-md);transform:translateY(-2px)}.activity-tile strong{font-size:19px;font-weight:var(--w-bold);letter-spacing:-.01em;line-height:1.2}.tile-icon{border-radius:var(--r-lg);color:#fff;width:52px;height:52px;box-shadow:var(--shadow-sm);place-items:center;display:grid}.tile-icon svg{fill:none;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:26px;height:26px}.activity-tile.blue{color:var(--tone-blue);border-color:var(--tone-blue-border)}.activity-tile.blue .tile-icon{background:var(--tone-blue-grad)}.activity-tile.green{color:var(--tone-green);border-color:var(--tone-green-border)}.activity-tile.green .tile-icon{background:var(--tone-green-grad)}.activity-tile.purple{color:var(--tone-purple);border-color:var(--tone-purple-border)}.activity-tile.purple .tile-icon{background:var(--tone-purple-grad)}.activity-tile.amber{color:var(--tone-amber);border-color:var(--tone-amber-border)}.activity-tile.amber .tile-icon{background:var(--tone-amber-grad)}.activity-tile.rose{color:var(--tone-rose);border-color:var(--tone-rose-border)}.activity-tile.rose .tile-icon{background:var(--tone-rose-grad)}.activity-tile p{color:var(--muted);margin:0;font-size:14px;line-height:1.5}.slide-in{animation:.22s slide-in}@keyframes slide-in{0%{opacity:0;transform:translate(16px)}to{opacity:1;transform:translate(0)}}.back-button{border:1px solid var(--line);border-radius:var(--r-full);background:var(--surface);min-height:40px;color:var(--brand);font-weight:var(--w-semibold);box-shadow:var(--shadow-xs);align-items:center;gap:7px;margin-bottom:16px;padding:0 14px 0 11px;display:inline-flex}.back-button svg{fill:none;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:17px;height:17px}.panel-view h2{font-size:clamp(21px,3.5vw,26px);font-weight:var(--w-bold);letter-spacing:-.015em;margin:0 0 16px}.agenda-days,.timeline,.topic-list,.quiz-form{gap:14px;display:grid}.agenda-day{border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);padding:18px}.agenda-day h3{font-size:18px;font-weight:var(--w-bold);margin:0 0 16px}.timeline{padding-left:42px;position:relative}.timeline-item{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);color:var(--ink);text-align:left;gap:4px;padding:14px 16px;transition:border-color .14s,background .14s,box-shadow .14s;display:grid;position:relative}.timeline-item:before{content:"";border-radius:var(--r-full);background:var(--line);border:2px solid var(--line);place-items:center;width:26px;height:26px;font-size:13px;line-height:1;display:grid;position:absolute;top:12px;left:-42px}.timeline-item:not(:last-child):after{content:"";border-radius:var(--r-full);background:var(--faint);width:2px;position:absolute;top:44px;bottom:-27px;left:-30px}.timeline-item:hover{border-color:var(--brand-border);box-shadow:var(--shadow-sm)}.timeline-item.completed{opacity:.82}.timeline-item.completed:before{content:"✓";background:var(--success);border-color:var(--success);color:#fff;font-weight:var(--w-bold)}.timeline-item.current{border-color:var(--brand-border);background:var(--brand-soft)}.timeline-item.current:before{border-color:var(--brand);background:radial-gradient(circle, var(--brand) 0 5px, var(--surface) 6px);box-shadow:0 0 0 4px var(--brand-ring)}.timeline-item time,.timeline-item small{color:var(--muted);font-size:13px;font-weight:var(--w-semibold)}.live-badge{border-radius:var(--r-full);background:var(--brand);color:#fff;font-size:11px;font-style:normal;font-weight:var(--w-bold);text-transform:uppercase;letter-spacing:.04em;vertical-align:1px;margin-left:8px;padding:1px 8px;display:inline-block}.timeline-item span{font-size:16px;font-weight:var(--w-bold)}.session-detail,.panel-card,.response-form,.quiz-question,.success-panel,.timed-message{border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-sm);padding:20px}.session-detail h2{font-size:clamp(21px,3.5vw,27px);font-weight:var(--w-bold);letter-spacing:-.015em;margin:0;line-height:1.18}.session-meta{flex-wrap:wrap;gap:8px;margin-top:14px;display:flex}.meta-chip{border:1px solid var(--line);border-radius:var(--r-full);background:var(--soft);min-height:32px;color:var(--muted);font-size:13px;font-weight:var(--w-semibold);align-items:center;gap:7px;padding:0 12px;display:inline-flex}.meta-chip svg{fill:none;stroke:currentColor;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;flex:none;width:15px;height:15px}.session-divider{background:var(--line);height:1px;margin:18px 0}.speaker-name{font-size:18px;font-weight:var(--w-bold)}.session-speaker{color:var(--ink)}.session-speaker-intro{color:var(--muted);margin-top:10px;font-size:15px;line-height:1.65}.session-description{border-top:1px solid var(--line);color:var(--ink);margin-top:18px;padding-top:18px}.session-description p,.session-description li{color:var(--ink)}.speaker-name+.html-content,.html-content+.html-content{margin-top:12px}.session-detail .session-description{margin-top:18px}.download-link,.primary-action,.secondary-action{border-radius:var(--r-md);min-height:44px;font-weight:var(--w-bold);border:0;justify-content:center;align-items:center;padding:0 16px;text-decoration:none;display:inline-flex}.download-link,.primary-action{background:var(--brand);color:#fff;box-shadow:var(--shadow-brand)}.download-link:hover,.primary-action:hover:not(:disabled){background:var(--brand-strong)}.secondary-action{border:1px solid var(--line);background:var(--surface);color:var(--brand)}.secondary-action:hover:not(:disabled){border-color:var(--brand-border);background:var(--brand-soft)}.download-link{margin-top:16px}.timed-message{background:var(--warning-soft);border-color:var(--warning-border);color:var(--warning);font-weight:var(--w-semibold);margin-bottom:14px}.success-panel{background:var(--success-soft);border-color:var(--success-border);color:var(--success);gap:4px;margin-bottom:14px;display:grid}.activity-row,.topic-card{border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);width:100%;color:var(--ink);text-align:left;justify-content:space-between;align-items:center;gap:14px;margin-bottom:10px;padding:16px;transition:border-color .14s,box-shadow .14s;display:flex}.activity-row:hover{border-color:var(--brand-border);box-shadow:var(--shadow-sm)}.topic-card{border-color:var(--brand-border);background:linear-gradient(135deg,#fff 0%,#f4f7ff 100%);transition:transform .16s,border-color .16s,box-shadow .16s}.topic-card:hover{border-color:var(--brand-border-strong);box-shadow:var(--shadow-md);transform:translateY(-1px)}.activity-row strong{font-weight:var(--w-bold)}.activity-row-copy{gap:6px;min-width:0;display:grid}.activity-row-copy small{color:var(--muted);font-size:14px;font-weight:var(--w-medium);line-height:1.45}.topic-card>span{font-weight:var(--w-semibold);line-height:1.45}.activity-row span{color:var(--muted);margin:0}.panel-card{margin-bottom:14px}.panel-card h3{font-size:22px;font-weight:var(--w-bold);margin:4px 0 14px}.upvote-action{border-radius:var(--r-full);color:#fff;min-height:40px;font-size:13px;font-weight:var(--w-bold);background:linear-gradient(135deg,#2457d6,#7c3aed);flex:none;align-items:center;gap:8px;padding:4px 12px 4px 5px;transition:transform .14s;display:inline-flex;box-shadow:0 4px 14px #2457d63d}.topic-card:hover .upvote-action{transform:scale(1.04)}.upvote-action span{border-radius:var(--r-full);color:#fff;background:#fff3;place-items:center;width:30px;height:30px;font-size:20px;line-height:1;display:grid}.upvote-action.voted{background:linear-gradient(135deg,#15803d,#16a34a);box-shadow:0 4px 14px #15803d38}.response-form,.quiz-form{gap:14px;display:grid}.summary-session-card,.panel-session-detail{gap:8px;display:grid}.summary-session-card .timer-pill,.quiz-question .timer-pill{border-radius:var(--r-full);color:#9a3412;background:linear-gradient(135deg,#fff7ed,#fffbeb);border:1px solid #fed7aa;justify-self:end;align-items:center;gap:8px;width:max-content;max-width:100%;min-height:36px;padding:6px 10px;display:inline-flex;box-shadow:0 6px 16px #9a34121a}.summary-session-card .timer-pill span,.quiz-question .timer-pill span{min-width:0;font-size:11px;font-weight:var(--w-bold);letter-spacing:.03em;text-transform:uppercase;align-items:center;gap:6px;display:flex}.summary-session-card .timer-pill span:before,.quiz-question .timer-pill span:before{content:"";border-radius:var(--r-full);border:2px solid;flex:none;width:8px;height:8px;box-shadow:inset 3px 0 #9a34122e}.summary-session-card .timer-pill strong,.quiz-question .timer-pill strong{color:#7c2d12;font-size:16px;font-weight:var(--w-heavy);font-variant-numeric:tabular-nums;line-height:1}.summary-session-card .timer-pill.expired,.quiz-question .timer-pill.expired{color:#b91c1c;background:#fef2f2;border-color:#fecaca}.summary-session-card .timer-pill.expired strong,.quiz-question .timer-pill.expired strong{color:#991b1b}.session-time{color:var(--brand);font-size:13px;font-weight:var(--w-bold);margin:0}.summary-session-card h2,.panel-session-detail h2{margin:0}.panel-session-detail>span{color:var(--muted);font-size:14px;font-weight:var(--w-semibold)}.panel-speaker-intro{color:var(--muted);margin-top:8px;font-size:15px;line-height:1.65}.panel-session-description{border-top:1px solid var(--line);color:var(--ink);margin-top:16px;padding-top:16px}.panel-session-description p,.panel-session-description li{color:var(--ink)}.response-info{border-radius:var(--r-md);background:var(--brand-soft);color:var(--info-ink);font-size:12px;font-weight:var(--w-semibold);margin:10px 0;padding:12px 14px;line-height:1.25}.word-counter{color:var(--muted);font-size:13px;font-weight:var(--w-semibold);justify-self:end}.word-counter.over{color:var(--danger)}.photo-corner{position:relative}.photo-corner-loading{z-index:1;border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);color:var(--muted);font-weight:var(--w-semibold);align-content:center;place-items:center;gap:14px;display:grid;position:absolute;inset:0}.photo-corner-frame{border:1px solid var(--line);border-radius:var(--r-xl);background:var(--surface);width:100%;min-height:min(720px,100vh - 220px);box-shadow:var(--shadow-md);display:block;overflow:hidden}textarea,input{border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);width:100%;color:var(--ink);outline:none;padding:12px 13px;font-size:16px}textarea:focus,input:focus{border-color:var(--brand-border);box-shadow:0 0 0 4px var(--brand-ring)}.quiz-question{gap:10px;display:grid}.quiz-question-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;display:flex}.quiz-progress{border-radius:var(--r-full);background:var(--brand-soft);width:max-content;max-width:100%;color:var(--brand);font-size:12px;font-weight:var(--w-bold);padding:6px 10px}.quiz-progress-track{border-radius:var(--r-full);background:var(--brand-soft);height:6px;overflow:hidden}.quiz-progress-fill{border-radius:var(--r-full);background:var(--brand);height:100%;transition:width .24s}.quiz-question h3{font-weight:var(--w-bold);margin:0 0 10px;font-size:21px;line-height:1.3}.radio-option{border:1px solid var(--line);border-radius:var(--r-md);background:var(--soft);cursor:pointer;align-items:center;gap:10px;padding:12px 14px;transition:border-color .14s,background .14s;display:flex}.radio-option:hover{border-color:var(--brand-border)}.radio-option:has(input:checked){border-color:var(--brand);background:var(--brand-soft)}.radio-option input{width:18px;height:18px;accent-color:var(--brand);flex:none}.quiz-step-actions{justify-content:space-between;align-items:center;gap:10px;display:flex}.identify-backdrop{z-index:20;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#10182875;align-items:end;padding:16px;animation:.16s fade-in;display:grid;position:fixed;inset:0}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.identify-sheet{background:var(--surface);width:min(520px,100%);box-shadow:var(--shadow-lg);border-radius:22px;max-height:calc(100dvh - 24px);margin:0 auto;padding:26px;animation:.26s cubic-bezier(.2,.9,.3,1) sheet-up;position:relative;overflow-y:auto}@keyframes sheet-up{0%{opacity:0;transform:translateY(28px)}to{opacity:1;transform:translateY(0)}}.sheet-close{border:1px solid var(--line);border-radius:var(--r-full);background:var(--soft);min-height:32px;color:var(--muted);font-size:13px;font-weight:var(--w-semibold);padding:0 14px;position:absolute;top:16px;right:16px}.sheet-close:hover{color:var(--ink);border-color:var(--faint)}.identify-sheet h2{font-size:26px;font-weight:var(--w-bold);letter-spacing:-.015em;margin:0 72px 8px 0}.identify-sheet p,.form-message{color:var(--muted);line-height:1.5}.identify-sheet form{gap:13px;margin-top:18px;display:grid}.identify-sheet label{color:var(--muted);font-size:13px;font-weight:var(--w-semibold);gap:6px;display:grid}@media (hover:none){.activity-tile:hover,.topic-card:hover,.topic-card:hover .upvote-action{transform:none}}.activity-tile:active,.topic-card:active,.activity-row:active,.timeline-item:active{transform:scale(.985)}.primary-action:active:not(:disabled),.secondary-action:active:not(:disabled),.back-button:active{transform:translateY(1px)}@media (width<=820px){.toast-stack{width:auto;top:12px;left:12px;right:12px}.app-header{grid-template-columns:auto minmax(0,1fr);min-height:72px;padding:12px 14px}.logo{border-radius:var(--r-sm);width:42px;height:42px}.home-view,.panel-view{width:calc(100% - 24px);margin-top:16px}.action-grid{grid-template-columns:1fr}.activity-tile{align-content:start;min-height:132px}.agenda-day{padding:14px}.timeline{padding-left:36px}.timeline-item:before{width:24px;height:24px;left:-36px}.timeline-item:not(:last-child):after{top:42px;left:-25px}.activity-row,.topic-card{flex-direction:column;align-items:stretch}.upvote-action{width:max-content}.quiz-step-actions button{flex:1}.response-form .primary-action{width:100%}.identify-backdrop{padding:0}.identify-sheet{padding-top:30px;padding-bottom:calc(26px + env(safe-area-inset-bottom));border-radius:22px 22px 0 0;max-height:calc(100dvh - 12px)}.identify-sheet:before{content:"";border-radius:var(--r-full);background:var(--line);width:44px;height:5px;position:absolute;top:10px;left:50%;transform:translate(-50%)}}