:root{--bg:#f6f7f9;--panel:#fff;--text:#181b20;--muted:#616a75;--border:#e4e7ec;--shadow:0 10px 30px rgba(15,22,31,.08);--radius-lg:18px;--radius-md:14px;--teacher-selection-bg:#ffe98f;--teacher-selection-text:#1a1a1a}*{box-sizing:border-box}body,html{margin:0;padding:0;background:radial-gradient(circle at 20% 0,#fef2ea,transparent 30%),radial-gradient(circle at 100% 100%,#eaf4ff,transparent 30%),var(--bg);color:var(--text);font-family:Avenir Next,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin:0}.shell{min-height:100vh;padding:24px}.centered{display:grid;place-items:center}.panel{width:min(900px,100%);background:var(--panel);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow)}.hero{padding:48px 24px;text-align:center}.hero h1{font-size:clamp(2.3rem,6vw,3.5rem);margin-bottom:10px}.hero p{color:var(--muted);font-size:1.15rem;margin-bottom:28px}.stack{display:grid;grid-gap:12px;gap:12px}.actions{width:min(300px,100%);margin:0 auto}.button{border:1px solid var(--border);border-radius:999px;background:#fff;padding:12px 18px;font-size:1rem;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}.button:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(12,24,36,.08)}.button.primary{background:#181b20;border-color:#181b20;color:#fff}.input,.textarea{width:100%;border:1px solid var(--border);border-radius:var(--radius-md);padding:12px 14px;font-size:1rem;outline:none}.password-wrap{position:relative}.password-wrap .input{padding-right:76px}.eye-button{position:absolute;right:8px;top:50%;transform:translateY(-50%);border:1px solid var(--border);border-radius:999px;background:#fff;padding:4px 10px;font-size:.8rem;cursor:pointer}.textarea{min-height:150px;resize:vertical}.input:focus,.textarea:focus{border-color:#95a3b8}.page-title{font-size:clamp(2rem,4.2vw,2.8rem);margin-bottom:16px}.muted{color:var(--muted)}.logo-small{width:98px;height:auto;display:block}.logo-wrap{display:flex;justify-content:center;margin-bottom:14px}.created-by{margin-top:6px;text-align:center;font-size:.85rem;color:var(--muted)}.board{display:grid;grid-gap:18px;gap:18px;position:relative;overflow:hidden}.board-top{padding:24px 24px 18px;display:grid;grid-gap:14px;gap:14px}.board-top h1{font-size:clamp(2rem,5vw,3.25rem);line-height:1.08}.board-header{display:flex;justify-content:space-between;align-items:flex-start;gap:14px}.settings-trigger{border:1px solid var(--border);border-radius:999px;background:#fff;padding:10px 14px;font-size:.95rem;font-weight:600;display:inline-flex;align-items:center;gap:8px;cursor:pointer;white-space:nowrap}.settings-trigger:hover{box-shadow:0 6px 16px rgba(12,24,36,.1)}.badges{display:flex;flex-wrap:wrap;gap:12px}.badge{border:1px solid var(--border);border-radius:999px;padding:12px 16px;font-size:1.02rem;font-weight:600;background:#fff}.columns{display:grid;grid-gap:16px;gap:16px;grid-template-columns:repeat(4,minmax(0,1fr))}.column{border-radius:var(--radius-md);border:1px solid var(--border);background:#fff;padding:12px;min-height:320px}.column-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;padding:4px 4px 8px;border-bottom:1px solid var(--border)}.column-title h3{font-size:1.1rem}.column-title span{color:var(--muted);font-size:1rem}.column-cards{display:grid;grid-gap:10px;gap:10px}.response-card{position:relative;border-radius:12px;border:1px solid rgba(0,0,0,.06);padding:14px;cursor:pointer;box-shadow:0 4px 12px rgba(0,0,0,.06);animation:slideIn .22s ease both}.card-delete{position:absolute;top:8px;right:8px;border:1px solid rgba(0,0,0,.16);border-radius:999px;background:hsla(0,0%,100%,.75);font-size:.72rem;padding:3px 8px;cursor:pointer}.response-card header{color:rgba(0,0,0,.55);font-size:.82rem;margin-bottom:7px}.response-card p{white-space:pre-wrap;word-break:break-word;font-size:1.03rem;line-height:1.5}.response-card.highlighted{box-shadow:0 0 0 2px rgba(59,127,246,.5),0 8px 20px rgba(59,127,246,.2)}.toolbar{display:flex;flex-wrap:wrap;gap:10px}.section-edit-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:10px;gap:10px}.session-item{border:1px solid var(--border);border-radius:12px;background:#fff;padding:12px;display:grid;grid-gap:8px;gap:8px}.analytics-grid{display:grid;grid-template-columns:1fr;grid-gap:10px;gap:10px}.analytics-card{border:1px solid var(--border);border-radius:12px;background:#fff;padding:10px;display:grid;grid-gap:6px;gap:6px}.analytics-card h3{font-size:.95rem}.student-responses-grid{display:grid;grid-gap:10px;gap:10px}::selection{background:var(--teacher-selection-bg);color:var(--teacher-selection-text)}::-moz-selection{background:var(--teacher-selection-bg);color:var(--teacher-selection-text)}.settings-overlay{position:fixed;inset:0;background:rgba(15,22,31,.24);z-index:30}.settings-drawer{position:fixed;right:0;top:0;height:100dvh;width:min(450px,100vw);background:#fff;border-left:1px solid var(--border);box-shadow:-10px 0 28px rgba(9,20,32,.15);z-index:40;transform:translateX(103%);transition:transform .22s ease;padding:18px;overflow-y:auto;display:grid;grid-gap:14px;gap:14px}.settings-drawer.open{transform:translateX(0)}.settings-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.settings-head h2{font-size:1.45rem}.settings-group{border:1px solid var(--border);border-radius:14px;padding:12px;display:grid;grid-gap:10px;gap:10px;background:#fafbfc}.settings-group h3{font-size:1rem;display:inline-flex;align-items:center;gap:7px}@media (max-width:900px){.shell{padding:14px}.board-top{padding:18px 16px 14px}.board-header{flex-direction:column;align-items:stretch}.settings-trigger{width:-moz-fit-content;width:fit-content}.badge{font-size:.95rem;padding:10px 14px}}.reaction-row{margin-top:8px;display:flex;flex-wrap:wrap;gap:8px}.reaction-btn{border:1px solid var(--border);border-radius:999px;background:#fff;font-size:.78rem;padding:4px 10px;cursor:pointer}.reaction-btn.active{background:#181b20;border-color:#181b20;color:#fff}.vocab-link{border:none;background:transparent;color:#1858c4;text-decoration:underline;cursor:pointer;padding:0;font:inherit}.vocab-card{border:1px solid var(--border);border-radius:12px;padding:12px;background:#fff;display:grid;grid-gap:8px;gap:8px}.error{color:#a22222}.error,.success{font-size:.94rem}.success{color:#237f37}@keyframes slideIn{0%{opacity:0;transform:translateY(6px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}@media (max-width:1000px){.columns{grid-template-columns:repeat(2,minmax(0,1fr))}.analytics-grid,.section-edit-grid{grid-template-columns:1fr}}@media (max-width:680px){.shell{padding:14px}.columns{grid-template-columns:1fr}.button{width:100%}}