:root{--bg: #F5F2ED;--bg-2: #EDEAE3;--card: #FFFFFF;--card-2: #FDFCFA;--text: #2C2820;--text-2: #6B6560;--text-3: #A8A49E;--border: #E8E3DA;--border-2: #D8D3CA;--primary: #FF6B8A;--primary-soft: #FFF0F3;--primary-dark: #E5506F;--green: #52B788;--green-soft: #EDFAF4;--green-dark: #3D9A6E;--blue: #5B8FD5;--blue-soft: #EEF3FF;--purple: #9B87D4;--purple-soft:#F5F2FF;--purple-dark:#7C6BC0;--yellow: #E9A820;--yellow-soft:#FFF8E0;--choice-a-bg: #FFEAEE;--choice-a-fg: #E04060;--choice-b-bg: #E8EFFE;--choice-b-fg: #3A6FCC;--choice-c-bg: #E6F9F1;--choice-c-fg: #2A9E6A;--choice-d-bg: #FFF4DC;--choice-d-fg: #C47D10;--shadow-xs: 0 1px 3px rgba(0,0,0,.06);--shadow-sm: 0 2px 8px rgba(0,0,0,.07);--shadow: 0 4px 16px rgba(0,0,0,.09);--shadow-md: 0 8px 28px rgba(0,0,0,.11);--r-sm: 12px;--r: 18px;--r-lg: 24px;--r-xl: 32px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100dvh;line-height:1.5;-webkit-font-smoothing:antialiased}.page{max-width:480px;margin:0 auto;padding:18px 16px 100px;display:flex;flex-direction:column;gap:12px}.center-page{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:20px}.card{background:var(--card);border-radius:var(--r);padding:20px;box-shadow:var(--shadow-sm)}.card-sm{padding:14px 16px}.card-inset{background:var(--card-2);border:1.5px solid var(--border);border-radius:var(--r-sm);padding:14px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:0 22px;height:52px;border:none;border-radius:var(--r-sm);font-size:15px;font-weight:700;cursor:pointer;transition:transform .12s,box-shadow .12s,opacity .12s;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;letter-spacing:.01em}.btn:active:not(:disabled){transform:scale(.96)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-full{width:100%}.btn-sm{height:38px;padding:0 14px;font-size:13px;border-radius:10px}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px #ff6b8a59}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-success{background:var(--green);color:#fff;box-shadow:0 4px 14px #52b7884d}.btn-success:hover:not(:disabled){background:var(--green-dark)}.btn-secondary{background:var(--card);color:var(--text-2);border:1.5px solid var(--border-2);box-shadow:var(--shadow-xs)}.btn-ghost{background:transparent;color:var(--text-2);border:1.5px solid var(--border)}.btn-ai{background:var(--purple);color:#fff;box-shadow:0 4px 14px #9b87d44d}.btn-ai:hover:not(:disabled){background:var(--purple-dark)}.btn-ai-outline{background:var(--purple-soft);color:var(--purple-dark);border:1.5px solid rgba(155,135,212,.4)}.input,.textarea,.select{width:100%;padding:13px 16px;background:var(--card);border:1.5px solid var(--border);border-radius:var(--r-sm);color:var(--text);font-size:15px;font-family:inherit;transition:border-color .15s,box-shadow .15s;-webkit-appearance:none;box-shadow:var(--shadow-xs)}.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #ff6b8a1f}.input::placeholder,.textarea::placeholder{color:var(--text-3)}.textarea{resize:vertical;min-height:80px;line-height:1.5}.qr-header{display:flex;align-items:center;justify-content:space-between;background:var(--card);border-radius:var(--r);padding:14px 18px;box-shadow:var(--shadow-sm)}.qr-code-wrap{background:#fff;padding:5px;border-radius:10px;border:1.5px solid var(--border);line-height:0}.label-xs{font-size:11px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--text-3)}.room-code{font-size:22px;font-weight:800;letter-spacing:6px;color:var(--text)}.section-title{font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--text-3);margin-bottom:10px}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;background:var(--card);border:1.5px solid var(--border);border-radius:99px;font-size:13px;font-weight:500;box-shadow:var(--shadow-xs)}.chip-host{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}.chip-offline{opacity:.45}.pill{display:inline-flex;align-items:center;padding:4px 10px;border-radius:99px;font-size:12px;font-weight:700}.pill-primary{background:var(--primary-soft);color:var(--primary-dark)}.pill-green{background:var(--green-soft);color:var(--green-dark)}.pill-purple{background:var(--purple-soft);color:var(--purple-dark)}.pill-yellow{background:var(--yellow-soft);color:var(--yellow)}.timer-track{height:6px;background:var(--bg-2);border-radius:99px;overflow:hidden}.timer-fill{height:100%;background:linear-gradient(90deg,var(--primary),#FF9CB0);border-radius:99px;transition:width 1s linear}.choices-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.choice-btn{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:14px 14px 16px;border:2px solid transparent;border-radius:var(--r);font-size:14px;font-weight:500;cursor:pointer;text-align:left;line-height:1.4;min-height:88px;transition:transform .12s,box-shadow .12s;-webkit-tap-highlight-color:transparent;position:relative;overflow:hidden}.choice-btn:active:not(:disabled){transform:scale(.95)}.choice-btn:disabled{cursor:default}.choice-btn[data-k=A]{background:var(--choice-a-bg);color:var(--text)}.choice-btn[data-k=B]{background:var(--choice-b-bg);color:var(--text)}.choice-btn[data-k=C]{background:var(--choice-c-bg);color:var(--text)}.choice-btn[data-k=D]{background:var(--choice-d-bg);color:var(--text)}.choice-btn[data-k=A]:not(:disabled):hover{box-shadow:0 0 0 2px var(--choice-a-fg)}.choice-btn[data-k=B]:not(:disabled):hover{box-shadow:0 0 0 2px var(--choice-b-fg)}.choice-btn[data-k=C]:not(:disabled):hover{box-shadow:0 0 0 2px var(--choice-c-fg)}.choice-btn[data-k=D]:not(:disabled):hover{box-shadow:0 0 0 2px var(--choice-d-fg)}.choice-btn.selected[data-k=A]{border-color:var(--choice-a-fg);box-shadow:0 4px 14px #e0406033}.choice-btn.selected[data-k=B]{border-color:var(--choice-b-fg);box-shadow:0 4px 14px #3a6fcc33}.choice-btn.selected[data-k=C]{border-color:var(--choice-c-fg);box-shadow:0 4px 14px #2a9e6a33}.choice-btn.selected[data-k=D]{border-color:var(--choice-d-fg);box-shadow:0 4px 14px #c47d1033}.choice-btn.correct{border-color:var(--green)!important;box-shadow:0 4px 14px #52b78840}.choice-btn.dim{opacity:.4}.choice-key{width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:8px;font-size:13px;font-weight:800;flex-shrink:0}.choice-btn[data-k=A] .choice-key{background:var(--choice-a-fg);color:#fff}.choice-btn[data-k=B] .choice-key{background:var(--choice-b-fg);color:#fff}.choice-btn[data-k=C] .choice-key{background:var(--choice-c-fg);color:#fff}.choice-btn[data-k=D] .choice-key{background:var(--choice-d-fg);color:#fff}.choice-display{display:flex;align-items:flex-start;gap:10px;padding:12px;border-radius:var(--r-sm);border:1.5px solid var(--border);font-size:14px;background:var(--card-2)}.choice-display.correct-ans{border-color:var(--green);background:var(--green-soft)}.result-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid var(--border);font-size:14px}.result-row:last-child{border:none}.rank-row{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px solid var(--border);font-size:15px}.rank-row:last-child{border:none}.rank-num{width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:var(--primary-soft);color:var(--primary-dark);border-radius:8px;font-weight:800;font-size:13px;flex-shrink:0}.rank-num.top-1{background:#ffe9a0;color:#b8860b}.rank-num.top-2{background:#e8e8e8;color:#666}.rank-num.top-3{background:#ffe0cc;color:#b85c20}.rank-name{flex:1;font-weight:500}.rank-score{font-weight:700;color:var(--green-dark);font-size:14px}.qform{display:flex;flex-direction:column;gap:10px}.qform-ai-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.option-row{display:flex;align-items:center;gap:8px}.option-key{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:8px;font-weight:800;font-size:13px;flex-shrink:0}.option-key[data-k=A]{background:var(--choice-a-bg);color:var(--choice-a-fg)}.option-key[data-k=B]{background:var(--choice-b-bg);color:var(--choice-b-fg)}.option-key[data-k=C]{background:var(--choice-c-bg);color:var(--choice-c-fg)}.option-key[data-k=D]{background:var(--choice-d-bg);color:var(--choice-d-fg)}.option-key.correct-key{outline:2px solid var(--green);outline-offset:1px}.void-row{display:flex;align-items:center;justify-content:space-between;background:var(--card-2);border:1.5px solid var(--border);border-radius:var(--r-sm);padding:11px 14px;font-size:13px;gap:10px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#2c282066;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:flex-end;justify-content:center;z-index:1000;padding:20px}@media(min-height:500px){.modal-overlay{align-items:center}}.modal{background:var(--card);border-radius:var(--r-xl);padding:28px 24px;width:100%;max-width:360px;text-align:center;box-shadow:var(--shadow-md)}.modal-title{font-size:13px;color:var(--text-3);margin-bottom:14px}.modal-choice-box{background:var(--bg);border-radius:var(--r-sm);padding:14px;margin-bottom:6px}.modal-choice-key{font-size:1.5rem;font-weight:800}.modal-choice-text{font-size:1rem;font-weight:600;margin-top:4px;color:var(--text-2)}.modal-actions{display:flex;gap:10px;margin-top:20px}.modal-actions .btn{flex:1}.toast{position:fixed;top:env(safe-area-inset-top,16px);top:calc(env(safe-area-inset-top,0px) + 16px);left:50%;transform:translate(-50%);padding:12px 20px;border-radius:var(--r-sm);font-size:14px;font-weight:600;z-index:9999;box-shadow:var(--shadow-md);white-space:nowrap;animation:toastIn .25s cubic-bezier(.34,1.56,.64,1)}.toast-error{background:var(--primary);color:#fff}.toast-success{background:var(--green);color:#fff}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(-12px) scale(.9)}}.answered-badge{display:flex;align-items:center;justify-content:center;gap:8px;padding:16px;border-radius:var(--r);background:var(--green-soft);border:1.5px solid rgba(82,183,136,.3);color:var(--green-dark);font-weight:600;font-size:15px}.bottom-bar{position:fixed;bottom:0;right:0;background:#f5f2ede6;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--border);padding:12px 20px;padding-bottom:calc(12px + env(safe-area-inset-bottom,0px));display:flex;align-items:center;justify-content:space-between;gap:12px;max-width:480px;margin:0 auto;left:50%;transform:translate(-50%);width:100%}.waiting-screen{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;min-height:50vh;text-align:center}.spinner{width:18px;height:18px;border:2.5px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;display:inline-block}.spinner-dark{border-color:#0000001a;border-top-color:var(--text-2)}@keyframes spin{to{transform:rotate(360deg)}}.txt-muted{color:var(--text-3)}.txt-2{color:var(--text-2)}.txt-primary{color:var(--primary-dark)}.txt-green{color:var(--green-dark)}.txt-purple{color:var(--purple-dark)}.host-badge{display:inline-flex;align-items:center;gap:5px;padding:5px 12px;background:var(--primary-soft);color:var(--primary-dark);border-radius:99px;font-size:13px;font-weight:700}.void-banner{background:var(--purple-soft);border:1.5px solid rgba(155,135,212,.4);border-radius:var(--r-sm);padding:10px 14px;font-size:13px;font-weight:700;color:var(--purple-dark);text-align:center}.divider{height:1px;background:var(--border)}.progress-stat{display:flex;align-items:baseline;gap:4px}.progress-big{font-size:2.5rem;font-weight:800;line-height:1;color:var(--primary-dark)}.progress-sub{font-size:14px;color:var(--text-3)}