:root{--primary:#5b21b6;--primary2:#7c3aed;--ink:#2444a8;--bg:#f6f7fb;--card:#fff;--text:#171725;--muted:#6b7280;--line:#e5e7eb;--shadow:0 18px 50px rgba(31,41,55,.09)}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:linear-gradient(180deg,#faf9ff,#f4f6fb);color:var(--text)}button,input,select{font:inherit}button{cursor:pointer}.topbar{position:sticky;top:0;z-index:20;height:68px;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 18px;gap:22px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit;min-width:190px}.brand-mark{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),#06b6d4);color:#fff;font-weight:900;box-shadow:0 8px 22px rgba(91,33,182,.25)}.brand b{display:block;font-size:17px}.brand small{display:block;color:var(--muted);font-size:10px}.topnav{display:flex;gap:6px;margin-left:auto}.topnav a,.sidebar a{text-decoration:none;color:#454553;font-weight:800;font-size:12px;letter-spacing:.4px;padding:10px 12px;border-radius:10px}.topnav a:hover,.sidebar a:hover{background:#f0ebff;color:var(--primary)}.icon-btn{display:none;border:0;background:#f3f4f6;border-radius:10px;padding:10px}.layout{display:grid;grid-template-columns:220px 1fr;max-width:1600px;margin:auto}.sidebar{border-right:1px solid var(--line);min-height:calc(100vh - 68px);padding:24px 14px;position:sticky;top:68px;height:calc(100vh - 68px);background:#fff}.side-title{font-weight:900;font-size:18px;padding:0 10px 14px}.sidebar a{display:block;margin:3px 0}.side-note{margin:22px 10px;padding:14px;border-radius:14px;background:#f4efff;color:#5b21b6;font-size:12px;line-height:1.5}.content{padding:28px;min-width:0}.hero{background:linear-gradient(120deg,#2e1065,#5b21b6 45%,#0891b2);color:#fff;border-radius:28px;padding:36px;display:flex;justify-content:space-between;align-items:center;overflow:hidden;position:relative;box-shadow:var(--shadow);margin-bottom:22px}.hero:after{content:"";position:absolute;width:320px;height:320px;border:1px solid rgba(255,255,255,.15);border-radius:50%;right:5%;top:-130px}.eyebrow{font-size:11px;font-weight:900;letter-spacing:1.5px;opacity:.8}.hero h1{font-size:clamp(30px,4vw,50px);margin:8px 0}.hero p{max-width:750px;line-height:1.7;margin:0;color:#eee}.hero-stamp{width:150px;height:150px;display:grid;place-items:center;position:relative}.mini-seal{width:112px;height:112px;border:5px double #fff;border-radius:50%;display:grid;place-items:center;text-align:center;font-weight:900;letter-spacing:2px;line-height:1.1;transform:rotate(-8deg)}.mini-seal small{font-size:9px}.pulse-ring{position:absolute;inset:5px;border:1px solid rgba(255,255,255,.35);border-radius:50%;animation:pulse 2.3s infinite}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:22px;margin-bottom:22px}.workspace-head,.section-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:18px}.workspace-head h2,.section-head h2,.card h2{margin:0 0 6px}.workspace-head p,.section-head p{margin:0;color:var(--muted)}.autosave{font-size:12px;color:#15803d;background:#ecfdf5;border-radius:999px;padding:7px 10px}.workspace-grid{display:grid;grid-template-columns:minmax(300px,470px) minmax(330px,1fr);gap:22px}.controls{min-width:0}.control-group{border:1px solid var(--line);border-radius:17px;padding:15px;margin-bottom:14px;background:#fbfbfd}.control-group h3{font-size:14px;margin:0 0 13px}.shape-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.shape,.template-row button,.secondary,.quick-grid button,.share-row button,.action-grid button{border:1px solid var(--line);background:#fff;border-radius:11px;padding:10px 7px;font-weight:800;color:#444}.shape{font-size:20px}.shape span{display:block;font-size:10px;margin-top:4px}.shape.active,.template-row button:hover{border-color:var(--primary2);background:#f1eaff;color:var(--primary)}.template-row{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}.template-row button{font-size:11px}.control-group label{display:block;font-size:11px;font-weight:800;color:#4b5563;margin:10px 0}.control-group input[type=text],.control-group input[type=file],.control-group select,.control-group>label>input:not([type=color]):not([type=range]){width:100%;margin-top:5px;border:1px solid var(--line);border-radius:10px;padding:10px;background:#fff}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:10px}.two-col label input[type=color]{display:block;width:100%;height:38px;padding:3px;border:1px solid var(--line);border-radius:9px;margin-top:5px}.two-col input[type=range]{width:100%;accent-color:var(--primary)}output{display:block;color:var(--primary);font-size:10px;margin-top:2px}.richbar{display:flex;gap:4px;flex-wrap:wrap;margin:6px 0}.richbar button{border:1px solid var(--line);background:#fff;border-radius:7px;padding:6px 8px;font-size:11px}.rich-editor{min-height:58px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px;outline:none}.rich-editor:focus{border-color:var(--primary2);box-shadow:0 0 0 3px #ede9fe}.check{display:flex!important;align-items:center;gap:7px}.check input{accent-color:var(--primary)}.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}.preview-panel{border:1px solid var(--line);border-radius:17px;background:#f7f8fc;min-width:0;display:flex;flex-direction:column;overflow:hidden}.preview-toolbar{display:flex;justify-content:space-between;padding:13px 16px;background:#fff;border-bottom:1px solid var(--line);font-size:12px;font-weight:900}.preview-toolbar span:last-child{color:#15803d}.preview-stage{min-height:520px;display:grid;place-items:center;padding:28px;overflow:auto;background-image:radial-gradient(#d9dce7 1px,transparent 1px);background-size:16px 16px}.stamp{position:relative;display:flex;align-items:center;justify-content:center;color:var(--ink);background:#fff;transform-origin:center;transition:.2s;flex:none;overflow:hidden}.stamp.circle{border-radius:50%}.stamp.oval{border-radius:50%}.stamp.rect,.stamp.square{border-radius:8px}.stamp .inner{position:absolute;inset:9%;border:3px solid currentColor;pointer-events:none}.stamp.circle .inner,.stamp.oval .inner{border-radius:50%}.stamp.rect .inner,.stamp.square .inner{border-radius:5px}.arc{position:absolute;left:8%;right:8%;text-align:center;font-weight:900;letter-spacing:1px;font-size:clamp(10px,1.5vw,15px);white-space:nowrap;overflow:hidden}.arc.top{top:17%}.arc.bottom{bottom:17%}.center-content{position:absolute;left:18%;right:18%;top:38%;text-align:center;font-weight:900;word-break:break-word;line-height:1.15}.star{position:absolute;left:50%;top:26%;transform:translateX(-50%);font-size:18px}.logo-wrap{position:absolute;left:50%;top:58%;transform:translate(-50%,-50%);display:grid;place-items:center}.logo-wrap img{display:block;object-fit:contain}.hidden{display:none}.preview-info{display:flex;justify-content:space-between;padding:9px 14px;background:#fff;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}.action-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;padding:12px;background:#fff}.action-grid button.primary,.primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;border-color:transparent}.share-row{display:flex;gap:7px;padding:0 12px 12px;background:#fff}.share-row button{flex:1}.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.card p,.card li{line-height:1.75;color:#555}.card ul{padding-left:20px}.chips{display:flex;flex-wrap:wrap;gap:8px}.chips span{background:#f2ecff;color:#5b21b6;border-radius:999px;padding:8px 11px;font-size:11px;font-weight:800}.guide h3{margin-top:24px}.test .section-head{border-bottom:1px solid var(--line);padding-bottom:12px}.question{padding:15px 0;border-bottom:1px solid var(--line)}.question h3{font-size:14px;margin:0 0 9px}.options{display:grid;grid-template-columns:1fr 1fr;gap:7px}.option{border:1px solid var(--line);background:#fff;text-align:left;border-radius:10px;padding:9px;font-size:12px}.option.correct{background:#dcfce7;border-color:#22c55e}.option.wrong{background:#fee2e2;border-color:#ef4444}.score{margin-top:15px;font-weight:900;color:var(--primary)}footer{text-align:center;color:#777;padding:15px}footer a{color:var(--primary);font-weight:900}.distressed{filter:url(#none)}#progress{position:fixed;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,#06b6d4,#7c3aed);z-index:9999;transition:width .2s}@keyframes pulse{0%,100%{transform:scale(.92);opacity:.35}50%{transform:scale(1.05);opacity:1}}@media(max-width:1000px){.layout{grid-template-columns:1fr}.sidebar{position:fixed;z-index:30;left:-240px;top:68px;width:230px;transition:.25s;box-shadow:10px 20px 40px rgba(0,0,0,.15)}.sidebar.open{left:0}.topnav{display:none}.icon-btn{display:block;margin-left:auto}.content{padding:18px}.workspace-grid{grid-template-columns:1fr}.preview-panel{order:-1}.info-grid{grid-template-columns:1fr}.preview-stage{min-height:440px}}@media(max-width:620px){.hero{padding:24px;border-radius:20px}.hero-stamp{width:95px;height:95px}.mini-seal{width:78px;height:78px;font-size:12px;border-width:3px}.card{padding:15px;border-radius:17px}.two-col{grid-template-columns:1fr}.shape-grid{grid-template-columns:repeat(2,1fr)}.action-grid{grid-template-columns:1fr 1fr}.preview-stage{min-height:360px;padding:14px}.workspace-head,.section-head{align-items:flex-start;flex-direction:column}.brand{min-width:0}.hero p{font-size:13px}.options{grid-template-columns:1fr}.content{padding:10px}.topbar{padding:0 10px}}
/* Rich text formatting support */
.rich-editor b,.rich-editor strong,.center-content b,.center-content strong{font-weight:900}
.rich-editor i,.rich-editor em,.center-content i,.center-content em{font-style:italic}
.rich-editor u,.center-content u{text-decoration:underline}
.rich-editor s,.rich-editor strike,.center-content s,.center-content strike{text-decoration:line-through}
.rich-editor ul,.rich-editor ol,.center-content ul,.center-content ol{margin:4px 0;padding-left:22px;text-align:left}
.center-content{overflow-wrap:anywhere}
.center-content p,.center-content div{margin:0}
.richbar button:active,.richbar button.active{background:#ede9fe;border-color:#7c3aed;color:#5b21b6}