@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.relative{position:relative}.start{inset-inline-start:var(--spacing)}.table-row{display:table-row}}:root{--ink:#14233a;--paper:#f5f1e8;--coral:#ef6b58;--mint:#63b59b;--gold:#e8b44e;--line:#d8d3c8;--white:#fffefa}*{box-sizing:border-box}html,body{background:var(--paper);min-height:100%;color:var(--ink);margin:0;font-family:Avenir Next,PingFang SC,Microsoft YaHei,sans-serif}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.58}.brand{letter-spacing:.06em;align-items:center;gap:10px;font-size:22px;font-weight:800;display:flex}.brand-dot{background:var(--coral);border-radius:50% 50% 50% 2px;width:15px;height:15px;transform:rotate(-18deg)}.eyebrow{text-transform:uppercase;letter-spacing:.18em;color:var(--coral);font-size:12px;font-weight:800}.primary{background:var(--coral);color:#fff;border:0;border-radius:7px;justify-content:space-between;gap:40px;padding:15px 22px;font-weight:800;transition:all .15s;display:inline-flex;box-shadow:0 5px #bc4a3b}.primary:hover{transform:translateY(-2px);box-shadow:0 7px #bc4a3b}.primary:active{transform:translateY(3px);box-shadow:0 2px #bc4a3b}.wide{width:100%}.student-shell{background:radial-gradient(circle at 82% 22%,#63b59b2b 0 7%,#0000 7.2%),linear-gradient(90deg,#0000 49.9%,#14233a0a 50%,#0000 50.1%);grid-template-rows:auto 1fr auto;min-height:100vh;padding:30px 6vw;display:grid}.join-card{background:var(--white);border:1px solid var(--line);border-radius:14px;width:min(520px,100%);margin:auto;padding:44px;box-shadow:14px 14px #14233a14}.join-card h1{margin:12px 0;font-size:42px;line-height:1.15}.join-card>p{color:#69717d;margin:0 0 30px}.join-card form{gap:18px;display:grid}.join-card label,.control-panel label{gap:8px;font-size:13px;font-weight:700;display:grid}.join-card input,.control-panel input{background:#fff;border:1px solid #c8c5bd;border-radius:7px;outline:none;padding:14px 15px;font-size:16px}.join-card input:focus,.control-panel input:focus{border-color:var(--ink);box-shadow:0 0 0 3px #14233a14}.teacher-link{text-align:center;color:var(--ink);margin-top:24px;font-weight:700;display:block}.form-error{color:#b33b2d!important;margin:12px 0 0!important}.student-shell footer{text-align:center;color:#7a7d7c;font-size:12px}.answer-shell{background:var(--paper);min-height:100vh;padding:28px 6vw}.answer-head{justify-content:space-between;align-items:center;max-width:780px;margin:0 auto;display:flex}.student-chip{border:1px solid var(--line);background:#fff;border-radius:99px;padding:8px 13px;font-size:13px;font-weight:700}.student-chip i,.head-stat i{background:var(--mint);border-radius:50%;width:8px;height:8px;margin-right:7px;display:inline-block}.answer-card{background:var(--white);border:1px solid var(--line);border-radius:14px;max-width:780px;margin:30px auto;padding:34px;box-shadow:10px 10px #14233a0f}.room-row{border-bottom:1px solid var(--line);justify-content:space-between;padding-bottom:24px;font-size:13px;font-weight:700;display:flex}.live-pill{color:#28836b}.question-top{justify-content:space-between;align-items:flex-start;margin-top:28px;display:flex}.question-top h1{margin:5px 0;font-size:46px}.status{border-radius:99px;padding:7px 11px;font-size:12px;font-weight:800}.status.open{color:#20725c;background:#dcefe8}.status.closed{color:#815a04;background:#f3e6c8}.status.revealed{color:#4a5668;background:#e4e8ef}.instruction{color:#707783}.answer-grid{grid-template-columns:1fr 1fr;gap:14px;margin:25px 0;display:grid}.choice{border:2px solid var(--line);height:92px;color:var(--ink);background:#fff;border-radius:10px;justify-content:space-between;align-items:center;padding:0 28px;font-size:34px;font-weight:800;display:flex}.choice:hover{border-color:var(--ink)}.choice.selected{background:var(--ink);border-color:var(--ink);color:#fff;box-shadow:5px 5px 0 var(--gold)}.choice span{font-size:20px}.submit{margin-top:8px}.success-note,.reveal{color:#276c59;text-align:center;background:#e4f2ed;border-radius:7px;margin-top:20px;padding:14px;font-weight:700}.reveal{color:var(--ink);background:#f7e9c9}.reveal strong{margin-left:10px;font-size:24px}.waiting{text-align:center;padding:85px 20px}.waiting h1{font-size:30px}.waiting p{color:#7a7f86}.pulse-mark{letter-spacing:8px;color:var(--coral);font-size:24px;animation:1.4s infinite pulse}@keyframes pulse{50%{opacity:.5}}.teacher-welcome{background:linear-gradient(110deg,var(--paper) 0 66%,var(--ink) 66%);flex-direction:column;min-height:100vh;padding:34px 6vw;display:flex}.teacher-welcome .brand small{background:var(--ink);color:#fff;border-radius:3px;padding:4px 7px;font-size:11px}.teacher-welcome section{width:min(680px,100%);margin:auto 0}.teacher-welcome h1{letter-spacing:-.055em;margin:14px 0 25px;font-size:clamp(44px,7vw,82px);line-height:1.03}.teacher-welcome p{color:#626a73;max-width:560px;line-height:1.8}.teacher-welcome .primary{margin-top:20px}.teacher-welcome section>a{color:var(--ink);margin-top:28px;font-size:13px;font-weight:700;display:block}.dashboard{background:#f3f0e8;grid-template-columns:225px 1fr;min-height:100vh;display:grid}.dashboard aside{background:var(--ink);color:#fff;flex-direction:column;height:100vh;padding:30px 24px;display:flex;position:sticky;top:0}.brand.inverse .brand-dot{background:var(--gold)}.dashboard nav{gap:8px;margin-top:60px;display:grid}.dashboard nav button{color:#aeb7c6;text-align:left;background:0 0;border:0;border-radius:6px;padding:13px}.dashboard nav button b{color:#6d7a8e;margin-right:12px;font-size:10px}.dashboard nav button.active{color:#fff;background:#243651}.dashboard nav button.active b{color:var(--gold)}.class-code{background:#22344e;border:1px solid #344862;border-radius:9px;margin-top:auto;padding:17px}.class-code small{color:#9ba8ba;display:block}.class-code strong{letter-spacing:.12em;margin:6px 0;font-size:30px;display:block}.class-code span{color:#76cbb2;font-size:11px}.end-link{color:#8491a4;background:0 0;border:0;margin-top:17px;font-size:11px;text-decoration:underline}.dash-content{padding:34px clamp(24px,4vw,62px)}.dash-content>header{justify-content:space-between;align-items:center;margin-bottom:28px;display:flex}.dash-content h1{margin:4px 0;font-size:34px}.head-stat{border:1px solid var(--line);background:#fff;border-radius:99px;padding:10px 14px;font-size:13px}.live-layout{grid-template-columns:minmax(290px,360px) 1fr;gap:22px;display:grid}.control-panel,.results-panel,.analysis-card{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:24px;box-shadow:5px 5px #14233a0d}.control-panel form{gap:20px;display:grid}.panel-title{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding-bottom:18px;font-size:20px;font-weight:800;display:flex}.panel-title small{color:#85888c;font-size:11px;font-weight:500}.field{gap:8px;font-size:13px;font-weight:700;display:grid}.segmented{background:#ece9e1;border-radius:7px;grid-template-columns:1fr 1fr;padding:4px;display:grid}.segmented button{color:#73777b;background:0 0;border:0;border-radius:5px;padding:10px}.segmented button.on{color:var(--ink);background:#fff;box-shadow:0 1px 4px #ccc}.mini-choices{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}.mini-choices button{border:1px solid var(--line);background:#fff;border-radius:6px;padding:11px;font-weight:800}.mini-choices button.on{background:var(--ink);color:#fff;border-color:var(--ink)}.q-meta{gap:10px;margin:22px 0;display:flex}.q-meta span,.tags span{background:#ece9e1;border-radius:4px;padding:6px 9px;font-size:12px}.tags{flex-wrap:wrap;gap:7px;margin-bottom:28px;display:flex}.tags span{color:#276d5a;background:#e1f0eb}.stop-button{border:1px solid var(--coral);color:#b94435;background:#fff;border-radius:7px;width:100%;padding:14px;font-weight:800}.summary-row{border-bottom:1px solid var(--line);grid-template-columns:repeat(3,1fr);padding-bottom:22px;display:grid}.summary-row>div{border-right:1px solid var(--line);padding:0 20px}.summary-row>div:first-child{padding-left:0}.summary-row>div:last-child{border:0}.summary-row small{color:#777f88;font-size:11px;display:block}.summary-row strong{font-size:34px}.summary-row em{color:#8a8e92;font-size:16px;font-style:normal}.distribution{border-bottom:1px solid var(--line);gap:14px;padding:28px 0;display:grid}.bar-row{grid-template-columns:24px 1fr 76px;align-items:center;gap:14px;display:grid}.bar-row>b{font-size:17px}.bar-row>div{background:#ebe8e0;border-radius:99px;height:9px;overflow:hidden}.bar-row>div span{background:var(--coral);border-radius:99px;height:100%;display:block}.bar-row:nth-child(2)>div span{background:var(--mint)}.bar-row:nth-child(3)>div span{background:var(--gold)}.bar-row:nth-child(4)>div span{background:#62728a}.bar-row>strong{font-size:16px}.bar-row>strong small{color:#81858a;margin-left:5px;font-weight:400}.response-list{margin-top:20px}.list-head,.list-row{grid-template-columns:1fr 100px 70px;align-items:center;padding:9px 4px;display:grid}.list-head{color:#8b8e90;text-transform:uppercase;font-size:10px}.list-row{border-top:1px solid #ece9e2;font-size:13px}.list-row>span{align-items:center;gap:9px;font-weight:700;display:flex}.list-row i,.table-row i{background:#e9e3d6;border-radius:50%;place-items:center;width:27px;height:27px;font-style:normal;display:inline-grid}.list-row em{font-size:11px;font-style:normal;font-weight:700}.right{color:#27856a}.wrong{color:#c34c3d}.pending{color:#96999c}.analysis-card{padding:0;overflow:hidden}.analysis-intro{border-bottom:1px solid var(--line);padding:28px}.analysis-intro h2{margin:0 0 7px}.analysis-intro p{color:#747b82;margin:0;font-size:13px}.analysis-table{overflow-x:auto}.table-head,.table-row{grid-template-columns:1.3fr 1fr .8fr 1.3fr;align-items:center;min-width:680px;padding:14px 28px;display:grid}.table-head{color:#85898d;background:#f1eee6;font-size:10px}.table-row{border-top:1px solid #ebe8e1;font-size:13px}.table-row>span:first-child{align-items:center;gap:10px;font-weight:700;display:flex}.table-row strong{font-size:18px}.table-row mark{color:#825d0e;background:#f8e8c6;border-radius:4px;padding:5px 8px}.tag-grid{grid-template-columns:repeat(3,1fr);gap:16px;padding:28px;display:grid}.tag-grid article{border:1px solid var(--line);border-radius:8px;padding:18px}.tag-grid article>div:first-child{justify-content:space-between;display:flex}.tag-grid article strong{font-size:24px}.tag-grid article small{color:#7e8387}.tag-bar{background:#ebe8e0;border-radius:99px;height:7px;margin:16px 0;overflow:hidden}.tag-bar span{background:var(--coral);height:100%;display:block}.empty{color:#777;padding:35px}@media (max-width:850px){.dashboard{display:block}.dashboard aside{height:auto;padding:18px;position:static}.dashboard aside .brand,.class-code,.end-link{display:none}.dashboard nav{margin:0;display:flex;overflow-x:auto}.dashboard nav button{white-space:nowrap}.live-layout{grid-template-columns:1fr}.dash-content{padding:24px 15px}.tag-grid{grid-template-columns:1fr}.teacher-welcome{background:var(--paper)}}@media (max-width:560px){.student-shell{padding:22px 16px}.join-card{padding:28px 22px}.join-card h1{font-size:34px}.answer-shell{padding:18px 12px}.answer-card{padding:22px 18px}.question-top h1{font-size:38px}.choice{height:80px;padding:0 20px}.dash-content>header{align-items:flex-end}.head-stat{font-size:11px}.summary-row>div{padding:0 9px}.summary-row strong{font-size:28px}.results-panel,.control-panel{padding:18px}.bar-row{grid-template-columns:22px 1fr 62px}.bar-row>strong small{margin:0;display:block}.teacher-welcome{padding:24px}.teacher-welcome h1{font-size:46px}}.question-set{gap:12px;margin:24px 0;display:grid}.question-line{border:1px solid var(--line);background:#fff;border-radius:9px;grid-template-columns:110px 1fr auto;align-items:center;gap:16px;padding:14px;display:grid}.question-label{display:grid}.question-label strong{font-size:16px}.question-label small{color:#84898e}.line-choices{grid-template-columns:repeat(4,1fr);gap:7px;display:grid}.line-choices button{border:1px solid var(--line);height:46px;color:var(--ink);background:#fff;border-radius:6px;font-weight:800}.line-choices button.on{background:var(--ink);border-color:var(--ink);color:#fff;box-shadow:2px 2px 0 var(--gold)}.line-key{color:#27745e;font-size:12px;font-weight:800}.draft-list{gap:12px;max-height:52vh;padding-right:3px;display:grid;overflow:auto}.draft-question{border:1px solid var(--line);background:#faf8f2;border-radius:8px;gap:12px;padding:14px;display:grid}.draft-head{justify-content:space-between;display:flex}.draft-head button{color:#b94b3e;background:0 0;border:0;font-size:11px}.add-question{color:var(--ink);background:0 0;border:1px dashed #9c9b95;border-radius:7px;padding:11px;font-weight:700}.question-tabs{gap:7px;margin:18px 0;display:flex;overflow-x:auto}.question-tabs button{white-space:nowrap;border:1px solid var(--line);background:#fff;border-radius:6px;padding:8px 10px;font-size:12px}.question-tabs button.on{background:var(--ink);color:#fff;border-color:var(--ink)}.active-number{margin:8px 0 0;font-size:28px}@media (max-width:560px){.question-line{grid-template-columns:1fr}.line-choices button{height:50px}.line-key{justify-self:start}}