*{box-sizing:border-box}
:root{--bg:#f7f8fc;--surface:#fff;--text:#172033;--muted:#68738a;--primary:#5b57d9;--primary-dark:#4541b7;--border:#e5e8f0;--soft:#eef0ff;--shadow:0 20px 60px rgba(32,39,70,.10)}
html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);line-height:1.6}a{color:inherit;text-decoration:none}
.site-header{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:28px;min-height:74px;padding:0 6%;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.logo{font-size:1.2rem;font-weight:800;margin-right:auto}.desktop-nav{display:flex;gap:20px;color:var(--muted);font-size:.91rem}.desktop-nav a:hover,.footer-links a:hover{color:var(--primary)}.header-actions{display:flex;gap:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 18px;border-radius:10px;font-weight:700;font-size:.92rem;transition:.2s ease;border:0;cursor:pointer}.btn:hover{transform:translateY(-1px)}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-ghost{color:var(--text)}.btn-secondary{background:#fff;border:1px solid var(--border)}.btn-light{background:#fff;color:var(--primary)}.btn-outline-light{color:#fff;border:1px solid rgba(255,255,255,.55);background:transparent}.btn-large{min-height:50px;padding:0 24px}
.menu-toggle{display:none;border:0;background:transparent;color:var(--text);font-size:1.6rem;cursor:pointer}.mobile-menu{display:none}
.hero{max-width:1200px;margin:0 auto;padding:92px 6% 85px;display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}.eyebrow{display:inline-block;margin-bottom:12px;color:var(--primary);font-size:.76rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
h1{margin:0 0 22px;font-size:clamp(2.7rem,5vw,4.7rem);line-height:1.04;letter-spacing:-.045em}h2{margin:0 0 15px;font-size:clamp(2rem,3vw,3rem);line-height:1.12;letter-spacing:-.03em}h3{margin:10px 0 7px;line-height:1.2}.hero-text,.section-heading p{color:var(--muted);font-size:1.08rem;max-width:670px}.hero-actions,.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.hero-note{color:var(--muted);font-size:.84rem;margin-top:14px}
.hero-card{background:var(--surface);border:1px solid var(--border);border-radius:22px;overflow:hidden;box-shadow:var(--shadow);transform:rotate(1deg)}.window-bar{display:flex;gap:7px;padding:14px 17px;background:#f1f2f7;border-bottom:1px solid var(--border)}.window-bar span{width:9px;height:9px;border-radius:50%;background:#c5c9d6}.preview-content{padding:28px}.preview-label{font-size:.7rem;font-weight:800;color:var(--primary);letter-spacing:.12em}.preview-content h2{font-size:1.7rem;margin:6px 0 20px}.preview-search{padding:11px 14px;border:1px solid var(--border);border-radius:9px;color:#9aa1b3;margin-bottom:14px}.topic-row{display:flex;gap:16px;padding:15px 4px;border-bottom:1px solid var(--border)}.topic-row b{color:var(--primary);min-width:28px}.topic-row span{font-weight:650}
.section{padding:90px 6%}.benefit,.features{max-width:1200px;margin:0 auto}.section-heading{max-width:760px}.centered{margin:0 auto;text-align:center}.benefit-grid,.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:42px}.benefit-grid article,.feature-grid article{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:25px}.benefit-grid strong{font-size:1.25rem}.benefit-grid p,.feature-grid p,.step p{color:var(--muted);margin-bottom:0}.how{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.steps{max-width:1200px;margin:45px auto 0;display:grid;grid-template-columns:repeat(5,1fr);gap:18px}.step{padding:22px 4px}.step span{color:var(--primary);font-weight:850;font-size:.8rem}.feature-icon{display:inline-flex;width:40px;height:40px;align-items:center;justify-content:center;border-radius:10px;background:var(--soft);color:var(--primary);font-weight:800}
.cta{margin:0 6% 70px;padding:55px 6%;border-radius:24px;background:var(--primary);color:#fff;display:flex;justify-content:space-between;align-items:center;gap:30px}.cta .eyebrow,.cta p{color:#e8e7ff}.cta h2{max-width:650px}.cta-actions{margin-top:0}.site-footer{padding:55px 6%;background:#151a2b;color:#fff;display:grid;grid-template-columns:1fr auto;gap:30px}.site-footer p{color:#aeb5c7;margin:7px 0 0}.footer-links{display:flex;gap:22px;align-items:center;color:#cbd0dc}.copyright{grid-column:1/-1;border-top:1px solid #2b3248;padding-top:22px;font-size:.82rem}

/* Guest workspace */
.guest-page{background:var(--bg);min-height:100vh}.guest-header{display:flex;align-items:center;gap:14px;min-height:74px;padding:0 5%;background:#fff;border-bottom:1px solid var(--border)}.guest-header .logo{margin-right:auto}
.guest-wrap{max-width:1180px;margin:0 auto;padding:35px 5% 70px}.guest-top{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin-bottom:25px}.guest-top h1{font-size:2.2rem;margin-bottom:7px}.guest-top p{color:var(--muted);margin:0}.guest-layout{display:grid;grid-template-columns:300px 1fr;gap:20px}
.panel{background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 8px 30px rgba(32,39,70,.05)}.panel h2{font-size:1.25rem}.panel input,.panel textarea,.panel select{width:100%;border:1px solid var(--border);border-radius:10px;padding:11px 12px;font:inherit;margin-bottom:10px;background:#fff}.panel textarea{min-height:180px;resize:vertical}
.project-list{display:grid;gap:8px;margin-top:14px}.project-item{width:100%;text-align:left;border:1px solid var(--border);background:#fff;padding:12px;border-radius:10px;cursor:pointer}.project-item.active{border-color:var(--primary);background:var(--soft)}
.workspace-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:15px}.workspace-bar input{flex:1;min-width:180px}.topic-list{display:grid;gap:9px;margin-top:16px}.topic-item{display:flex;gap:14px;align-items:center;padding:13px;border:1px solid var(--border);border-radius:11px;cursor:pointer;background:#fff}.topic-number{color:var(--primary);font-weight:800;min-width:32px}
.empty-state{text-align:center;padding:45px 20px;color:var(--muted)}.guest-badge{display:inline-flex;align-items:center;min-height:32px;padding:0 11px;border-radius:999px;background:var(--soft);color:var(--primary);font-size:.8rem;font-weight:800}.guest-actions{display:flex;gap:8px;flex-wrap:wrap}
.topic-view h2{font-size:1.8rem}.topic-meta{color:var(--muted);font-size:.85rem;margin-bottom:20px}.topic-content{overflow-wrap:anywhere;padding:20px;background:#fafbfe;border:1px solid var(--border);border-radius:12px;min-height:120px}
.topic-content img{max-width:100%;height:auto}.topic-content table{border-collapse:collapse;width:100%;margin:12px 0}.topic-content td,.topic-content th{border:1px solid var(--border);padding:7px;text-align:left}.topic-content ul,.topic-content ol{padding-left:25px}
.formatted-editor{min-height:260px;border:1px solid var(--border);border-radius:10px;padding:14px;background:#fff;overflow:auto}.formatted-editor:focus{outline:2px solid rgba(91,87,217,.18);border-color:var(--primary)}
.editor-toolbar{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}.tool-btn{min-width:38px;height:36px;border:1px solid var(--border);background:#fff;border-radius:8px;font-weight:700;cursor:pointer}.tool-btn:hover{background:var(--soft)}
.category-list{display:flex;flex-wrap:wrap;gap:7px;margin:10px 0 16px}.category-chip{display:inline-flex;align-items:center;gap:5px;padding:5px 9px;border-radius:999px;background:var(--soft);color:var(--primary);font-size:.8rem;font-weight:700}.category-chip button{border:0;background:transparent;color:inherit;cursor:pointer;padding:0}
.topic-tags{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0 2px}.topic-tag{padding:4px 8px;border-radius:999px;background:#f1f2f7;color:var(--muted);font-size:.75rem}
.filter-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0}.filter-row select{width:auto;margin:0;min-width:130px}.settings-box{margin-top:20px;padding-top:20px;border-top:1px solid var(--border)}.settings-box h3{margin-top:0}
.notice{padding:12px 14px;border-radius:10px;background:#fff8e6;border:1px solid #f0dfae;color:#6d5a20;font-size:.88rem;margin-bottom:14px}
@media(max-width:950px){.desktop-nav,.header-actions{display:none}.menu-toggle{display:block}.mobile-menu{position:fixed;top:74px;left:0;right:0;z-index:25;display:none;padding:12px 6%;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 15px 35px rgba(32,39,70,.08)}.mobile-menu.open{display:grid}.mobile-menu a{padding:13px 4px;border-bottom:1px solid #f0f1f5}.mobile-menu .btn{margin-top:8px}.mobile-guest{color:var(--primary);font-weight:800}.hero{grid-template-columns:1fr;padding-top:65px;gap:45px}.hero-card{transform:none}.benefit-grid,.feature-grid{grid-template-columns:1fr 1fr}.steps{grid-template-columns:1fr 1fr}.cta{flex-direction:column;align-items:flex-start}.site-footer{grid-template-columns:1fr}.footer-links{flex-wrap:wrap}.copyright{grid-column:auto}.guest-layout{grid-template-columns:1fr}}
@media(max-width:560px){.site-header{padding:0 5%}.hero,.section{padding-left:5%;padding-right:5%}h1{font-size:2.65rem}.hero-actions .btn,.cta-actions .btn{width:100%}.benefit-grid,.feature-grid,.steps{grid-template-columns:1fr}.cta{margin-left:5%;margin-right:5%;padding:40px 25px}.guest-top{flex-direction:column}.guest-wrap{padding-top:25px}.guest-header{padding:0 5%}.guest-header .btn{padding:0 12px}.filter-row select{flex:1}}