:root{--bg: #f7f5f0;--surface: #ffffff;--surface-2: #f0eee7;--border: #e5e2d9;--text: #2a2822;--text-dim: #7a7669;--accent: #cc785c;--accent-2: #b35f45;--accent-grad: var(--accent);--accent-soft: #f3e3dc;--danger: #c0574a;--success: #4d7c5f;--radius: 14px;--radius-sm: 8px;--shadow: 0 1px 2px rgba(61,57,41,.06), 0 8px 20px rgba(61,57,41,.07);--font-serif: "Source Serif 4", Georgia, serif;--font-sans: "Inter", system-ui, -apple-system, sans-serif}html[data-theme=dark]{--bg: #262521;--surface: #30302c;--surface-2: #3a3935;--border: #454440;--text: #eeece5;--text-dim: #a19d90;--accent: #e0906f;--accent-2: #cc785c;--accent-soft: #4a372f;--shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35)}*{box-sizing:border-box}html,body{height:100%;margin:0;padding:0;width:100%}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);width:100vw;overflow-x:hidden}#app{min-height:100vh;width:100%;display:flex;flex-direction:column}a{color:var(--accent)}button,input,select,textarea{font-family:inherit}h1,h2,h3{font-family:var(--font-serif);font-weight:600;letter-spacing:-.01em}.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;border-bottom:1px solid var(--border);background:var(--surface);width:100%;flex-shrink:0}.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;font-family:var(--font-serif)}.brand .logo{width:38px;height:38px;border-radius:11px;background:var(--accent);display:flex;align-items:center;justify-content:center;color:#fff}.brand .logo,.mkt-brand .logo{position:relative;overflow:hidden}.brand-nucleus{position:absolute;top:50%;left:50%;width:8px;height:8px;margin:-4px 0 0 -4px;border-radius:50%;background:#fff;box-shadow:0 0 5px #fffc;z-index:1}.brand-orbit{position:absolute;top:3px;right:3px;bottom:3px;left:3px;border:1px solid rgba(255,255,255,.45);border-radius:50%}.brand-orbit-1{transform:rotate(0) scaleY(.42)}.brand-orbit-2{transform:rotate(60deg) scaleY(.42)}.brand-orbit-3{transform:rotate(-60deg) scaleY(.42);border-color:#ffffff4d}.brand-electron-spin{position:absolute;top:0;right:0;bottom:0;left:0;animation:brand-spin linear infinite}.brand-orbit-1 .brand-electron-spin{animation-duration:1.8s}.brand-orbit-2 .brand-electron-spin{animation-duration:2.3s;animation-direction:reverse}.brand-orbit-3 .brand-electron-spin{animation-duration:2.9s}.brand-electron{position:absolute;top:-2px;left:50%;width:4px;height:4px;margin-left:-2px;border-radius:50%;background:#fff;box-shadow:0 0 3px #fff9}@keyframes brand-spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.brand-electron-spin{animation:none}}.topbar nav{display:flex;gap:6px;align-items:center}.topbar-user{display:flex;align-items:center;gap:10px}.avatar{width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px}.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-weight:600;font-size:.9rem;cursor:pointer;transition:all .15s ease}.btn:hover{border-color:var(--accent);color:var(--accent-2)}.btn-primary{background:var(--accent);color:#fff;border:none}.btn-primary:hover{background:var(--accent-2);color:#fff;filter:none}.btn-danger{color:var(--danger);border-color:var(--danger)}.btn-danger:hover{color:#fff;background:var(--danger)}.btn-success{color:#fff;background:var(--success);border-color:var(--success)}.btn-success:hover{color:#fff;background:var(--success);border-color:var(--success);filter:brightness(1.06)}.btn-ghost{border:none;background:transparent}.btn-ghost:hover{background:var(--surface-2);border-color:transparent}.btn-sm{padding:5px 10px;font-size:.8rem;border-radius:8px}.btn:disabled{opacity:.5;cursor:not-allowed}.icon-action-row{display:flex;gap:6px;margin-bottom:10px}.rail-icon-btn{flex:1;justify-content:center;padding:7px 0;font-size:1rem;position:relative}.rail-icon-btn-badge{position:absolute;top:-5px;right:-5px;min-width:16px;height:16px;padding:0 4px;border-radius:999px;background:var(--danger);color:#fff;font-size:.65rem;font-weight:700;line-height:16px;text-align:center}.main-full{flex:1;width:100%;padding:28px 32px}.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px;width:100%;margin-top:20px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease;box-shadow:var(--shadow)}.card:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 40%,var(--border))}.card-emoji{font-size:2rem}.card h3{margin:10px 0 4px;font-size:1.05rem;font-family:var(--font-serif);font-weight:600}.card p{margin:0;color:var(--text-dim);font-size:.85rem}.course-layout{display:flex;width:100%;flex:1;min-height:calc(100vh - 58px)}.tree-rail{width:300px;flex-shrink:0;border-right:1px solid var(--border);background:var(--surface);padding:16px;overflow-y:auto;overflow-x:hidden;box-sizing:border-box;transition:width .18s ease,padding .18s ease}.tree-rail.rail-collapsed{width:0;padding-left:0;padding-right:0;border-right:none}.rail-toggle-btn{flex-shrink:0;width:16px;border:none;border-right:1px solid var(--border);background:var(--surface);color:var(--text-dim);cursor:pointer;font-size:.65rem;display:flex;align-items:center;justify-content:center;padding:0}.rail-toggle-btn:hover{background:var(--surface-2);color:var(--text)}.tree-content{flex:1;padding:28px 32px;overflow-y:auto}.tree-content.topic-detail-fill{padding:0;display:flex;flex-direction:column;overflow:hidden}.topic-detail-header{padding:28px 32px 16px;flex-shrink:0}.topic-preview-wrap{flex:1;position:relative;width:100%;overflow:hidden;background:#fff}.topic-preview-wrap iframe{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:none}.topic-preview-wrap .empty-state{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center}.tree-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:8px;cursor:pointer;font-size:.9rem;margin-bottom:2px;-webkit-user-select:none;user-select:none}.tree-item:hover{background:var(--surface-2)}.tree-item.active{background:var(--accent-soft);color:var(--accent-2);font-weight:600}.tree-item.subtopic{margin-left:22px;font-size:.85rem}.tree-item[draggable=true]{cursor:grab}.studio{display:flex;flex-direction:column;height:100vh;width:100%}.studio-topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;border-bottom:1px solid var(--border);background:var(--surface);flex-shrink:0;gap:12px;flex-wrap:wrap}.version-loading{align-items:center;gap:6px;color:var(--text-dim);font-size:.78rem;white-space:nowrap}.version-loading-spinner{width:13px;height:13px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}.studio-body{flex:1;display:flex;width:100%;overflow:hidden}.chat-pane{display:flex;flex-direction:column;min-width:280px;background:var(--surface)}.splitter{width:6px;cursor:col-resize;background:var(--border);flex-shrink:0}.splitter:hover,.splitter.dragging{background:var(--accent)}.preview-pane{flex:1;min-width:200px;display:flex;flex-direction:column;background:var(--surface-2)}.preview-pane iframe{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:none;background:#fff}.chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}.chat-msg{max-width:92%;padding:10px 14px;border-radius:12px;font-size:.88rem;line-height:1.5;white-space:pre-wrap}.chat-msg.user{align-self:flex-end;background:var(--accent-grad);color:#fff;border-bottom-right-radius:3px}.chat-msg.assistant{align-self:flex-start;background:var(--surface-2);border-bottom-left-radius:3px}.chat-msg.system{align-self:center;color:var(--text-dim);font-size:.78rem;font-style:italic}.chat-input-row{display:flex;gap:8px;padding:12px;border-top:1px solid var(--border);align-items:flex-end}.chat-input-row textarea{flex:1;resize:none;border:1px solid var(--border);border-radius:10px;padding:10px 12px;background:var(--bg);color:var(--text);font-size:.9rem}#attach-image-btn{flex-shrink:0;font-size:1rem;line-height:1;padding:8px 10px}.template-picker-row{display:flex;gap:8px;overflow-x:auto;padding:8px 12px 0;border-top:1px solid var(--border)}.template-choice{flex:0 0 104px;display:grid;grid-template-columns:1fr;gap:4px;align-items:center;justify-items:stretch;padding:7px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);cursor:pointer;text-align:left}.template-choice:hover,.template-choice.is-active{border-color:var(--accent);background:var(--surface-2)}.template-choice.is-active{box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 18%,transparent)}.template-choice-code{font-size:.72rem;font-weight:800;color:var(--text);line-height:1}.template-choice-caption{font-size:.66rem;color:var(--text-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.template-choice-diagram{height:34px;display:grid;gap:3px;padding:3px;border:1px solid var(--border);border-radius:6px;background:var(--bg)}.template-choice-diagram i{display:block;border-radius:3px;background:var(--border);min-width:0;min-height:0}.template-diagram-auto{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr}.template-diagram-auto .td-auto-a{grid-column:1 / 3;background:var(--accent);opacity:.75}.template-diagram-auto .td-auto-b{background:var(--success);opacity:.7}.template-diagram-auto .td-auto-c{background:var(--warning, #d97706);opacity:.7}.template-diagram-sim{grid-template-columns:2fr 1fr;grid-template-rows:1fr 1fr}.template-diagram-sim .td-visual{grid-row:1 / 3;background:var(--accent);opacity:.75}.template-diagram-sim .td-controls{background:var(--success);opacity:.8}.template-diagram-sim .td-readout{background:var(--warning, #d97706);opacity:.75}.template-diagram-qz{grid-template-rows:1fr 1fr 1fr}.template-diagram-qz .td-question{background:var(--accent);opacity:.75}.template-diagram-qz .td-answer{background:var(--success);opacity:.75}.template-diagram-qz .td-feedback{background:var(--warning, #d97706);opacity:.75}.template-diagram-ex{grid-template-columns:1fr 1.4fr 1fr}.template-diagram-ex .td-problem{background:var(--accent);opacity:.72}.template-diagram-ex .td-steps{background:var(--success);opacity:.75}.template-diagram-ex .td-result{background:var(--warning, #d97706);opacity:.72}.template-diagram-dtl{grid-template-columns:1fr 1fr;grid-template-rows:.7fr 1fr 1fr .7fr}.template-diagram-dtl .td-head{grid-column:1 / 3;background:var(--accent);opacity:.72}.template-diagram-dtl .td-section-a{background:var(--success);opacity:.7}.template-diagram-dtl .td-section-b{background:var(--success);opacity:.55}.template-diagram-dtl .td-recap{grid-column:1 / 3;background:var(--warning, #d97706);opacity:.7}.image-preview-row{padding:8px 12px 0}.image-preview-chip{display:inline-flex;align-items:center;gap:8px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:4px 8px 4px 4px;max-width:100%}.image-preview-chip img{width:34px;height:34px;object-fit:cover;border-radius:6px;flex-shrink:0}.image-preview-name{font-size:.76rem;color:var(--text-dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:220px}.image-preview-chip button{border:none;background:none;color:var(--text-dim);cursor:pointer;font-size:.95rem;line-height:1;padding:2px 4px;border-radius:4px;flex-shrink:0}.image-preview-chip button:hover{background:var(--border);color:var(--text)}.chat-msg-image{display:block;max-width:200px;max-height:150px;border-radius:8px;margin-bottom:6px;object-fit:cover}.preview-toolbar{display:flex;align-items:center;gap:8px;padding:8px 12px;border-bottom:1px solid var(--border);background:var(--surface);flex-wrap:wrap;justify-content:space-between}.preview-toolbar-actions{display:flex;align-items:center;justify-content:flex-end;gap:8px;flex-wrap:wrap}.layout-editor-status{color:var(--text-dim);font-size:.78rem}.layout-tools{display:flex;align-items:center;gap:4px;flex-wrap:wrap;padding:4px;border:1px solid var(--border);border-radius:9px;background:var(--surface-2)}.layout-tools .btn{padding:4px 7px;font-size:.72rem}.layout-tool-divider{width:1px;height:22px;background:var(--border);margin:0 2px}.pin-marker{position:absolute;width:24px;height:24px;border-radius:50%;background:var(--accent);color:#fff;font-size:.72rem;font-weight:700;display:flex;align-items:center;justify-content:center;transform:translate(-50%,-50%);box-shadow:0 2px 6px #00000040;cursor:pointer;border:2px solid #fff;z-index:5}.pin-marker:hover{background:var(--accent-2)}.streaming-indicator{font-size:.8rem;font-weight:600;color:#fff;display:flex;align-items:center;gap:7px;background:var(--accent-grad);padding:5px 12px 5px 10px;border-radius:999px;box-shadow:0 2px 8px #cc785c59}.dot-pulse{width:7px;height:7px;border-radius:50%;background:#fff;animation:pulse 1s infinite ease-in-out;flex-shrink:0}@keyframes pulse{0%,to{opacity:.35;transform:scale(.85)}50%{opacity:1;transform:scale(1)}}.generating-overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:20;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;background:color-mix(in srgb,var(--surface) 88%,transparent);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);text-align:center;padding:24px}.generating-spinner{width:40px;height:40px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--accent);animation:spin .85s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.generating-overlay .generating-title{font-size:1rem;font-weight:700;color:var(--text)}.generating-overlay .generating-sub{font-size:.82rem;color:var(--text-dim);min-height:1.2em}.generating-progress-track{width:220px;height:5px;border-radius:999px;background:var(--border);overflow:hidden}.generating-progress-fill{width:40%;height:100%;border-radius:999px;background:var(--accent-grad);animation:indeterminate 1.3s ease-in-out infinite}@keyframes indeterminate{0%{transform:translate(-100%)}to{transform:translate(340%)}}.content-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-height:240px;height:100%;color:var(--text-dim);font-size:.9rem}.content-loading-spinner{width:32px;height:32px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--accent);animation:spin .85s linear infinite}select,input[type=text],input[type=email],input[type=password],textarea{border:1px solid var(--border);border-radius:8px;padding:8px 10px;background:var(--surface);color:var(--text)}.center-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;width:100%}.auth-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;width:380px;box-shadow:var(--shadow)}.auth-card h1{text-align:center;margin-top:0}.field{margin-bottom:12px;display:flex;flex-direction:column;gap:4px}.field label,.field>span{font-size:.8rem;color:var(--text-dim)}.field input,.field select,.field textarea{width:100%}.divider{display:flex;align-items:center;gap:10px;color:var(--text-dim);font-size:.8rem;margin:14px 0}.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--border)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:flex;align-items:center;justify-content:center;z-index:100}.modal{background:var(--surface);border-radius:var(--radius);padding:24px;width:420px;max-width:92vw;box-shadow:var(--shadow)}.modal-wide{width:640px}.modal h2{margin-top:0}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}.visual-setup-overlay{padding:18px;overflow-y:auto}.visual-setup-modal{width:720px;max-height:calc(100vh - 36px);overflow-y:auto}.visual-setup-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:18px}.visual-setup-heading h2{margin:0 0 5px}.visual-setup-heading p{margin:0;color:var(--text-dim);font-size:.88rem}.visual-setup-time{flex-shrink:0;padding:5px 9px;border-radius:999px;background:var(--surface-2);color:var(--text-dim);font-size:.72rem}.visual-setup-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 16px}.visual-setup-grid .field{margin:0}.visual-setup-grid select{width:100%;min-width:0}.visual-setup-wide{margin-top:13px;margin-bottom:0}.visual-setup-wide small{color:var(--text-dim);font-weight:400}@media(max-width:640px){.visual-setup-grid{grid-template-columns:1fr}.visual-setup-heading{display:block}.visual-setup-time{display:inline-block;margin-top:9px}}.content-mode-toggle{display:flex;gap:8px}.content-mode-btn{flex:1;justify-content:center;white-space:nowrap}.content-mode-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.info-box{background:var(--surface-2);border-radius:10px;padding:10px 12px;font-size:.8rem;line-height:1.5;color:var(--text-dim)}.field-row{display:flex;gap:14px;flex-wrap:wrap}.field-row .field{flex:1 1 200px;min-width:0;margin-bottom:0}.empty-state{text-align:center;padding:60px 20px;color:var(--text-dim)}.settings-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;width:100%;margin-top:20px}.settings-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.settings-panel h3{margin-top:0}.pill{display:inline-block;padding:3px 10px;border-radius:999px;background:var(--surface-2);font-size:.75rem;color:var(--text-dim)}.admin-stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px}.admin-stat{border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px;background:var(--surface-2)}.admin-stat span{display:block;color:var(--text-dim);font-size:.76rem;margin-bottom:5px}.admin-stat strong{font-size:1.35rem;font-weight:700}.admin-table{width:100%;border-collapse:collapse;font-size:.86rem}.admin-table th,.admin-table td{padding:10px 8px;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}.admin-table th{color:var(--text-dim);font-size:.76rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em}.admin-table tbody tr:hover{background:var(--surface-2)}.admin-page{max-width:1200px;margin:0 auto}.admin-page .settings-panel{box-shadow:var(--shadow)}.admin-page .settings-panel h3{display:flex;align-items:center;gap:8px;padding-bottom:10px;margin-bottom:4px;border-bottom:1px solid var(--border)}.admin-page .settings-panel h3:before{content:"";width:4px;height:1.05em;border-radius:2px;background:var(--accent);flex-shrink:0}.admin-page hr{border:none;border-top:1px solid var(--border);margin:18px 0}.admin-page .field select{appearance:none;-webkit-appearance:none;-moz-appearance:none;padding-right:32px;cursor:pointer;text-overflow:ellipsis;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237a7669' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");background-repeat:no-repeat;background-position:right 10px center;background-size:15px;transition:border-color .15s ease,box-shadow .15s ease}html[data-theme=dark] .admin-page .field select{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23a19d90' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>")}.admin-page .field select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.admin-actions{display:flex;align-items:center;gap:10px;margin-top:18px;flex-wrap:wrap}.admin-save-status{color:var(--text-dim);font-size:.85rem}.admin-save-status.is-ok{color:var(--success);font-weight:600}.admin-save-status.is-fail{color:var(--danger);font-weight:600}.admin-test-area-entry{display:flex;align-items:center;justify-content:space-between;gap:24px;background:linear-gradient(120deg,var(--surface),var(--accent-soft))}.admin-test-area-entry>div{max-width:760px}.experiment-test-header{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;flex-wrap:wrap;margin-bottom:20px}.experiment-test-header h1{margin:10px 0 6px}.experiment-test-header p{margin:0;color:var(--text-dim)}.relativity-lab{display:grid;gap:18px}.object-workbench{padding:20px}.workbench-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;flex-wrap:wrap}.workbench-heading h2{margin:9px 0 4px}.workbench-heading p{margin:0!important}.object-add-row{display:flex;gap:7px;flex-wrap:wrap}.object-workbench-grid{display:grid;grid-template-columns:minmax(180px,.55fr) minmax(0,2fr);gap:16px;margin-top:18px}.object-list{display:flex;flex-direction:column;gap:6px;max-height:230px;overflow:auto}.object-list-item{display:flex;align-items:center;gap:10px;text-align:left;border:1px solid var(--border);background:var(--surface-2);color:var(--text);border-radius:9px;padding:9px;cursor:pointer}.object-list-item.active{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}.object-list-item i{width:12px;height:12px;border-radius:50%;flex:none}.object-list-item span{min-width:0}.object-list-item strong,.object-list-item small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.object-list-item small{font-size:.68rem;color:var(--text-dim);margin-top:3px}.object-editor{display:grid;grid-template-columns:repeat(4,minmax(110px,1fr));gap:11px;align-items:end}.object-editor label{display:grid;gap:5px;font-size:.72rem;color:var(--text-dim)}.object-editor input{width:100%;min-width:0}.object-editor input[type=color]{height:37px;padding:3px}.object-editor label:nth-child(4),.object-editor label:nth-child(5){grid-column:span 2}.object-remove{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 35%,var(--border))}.framework-boundary{margin-top:16px;padding:11px 13px;border-radius:9px;background:var(--surface-2);border-left:3px solid #f0ad3d;color:var(--text-dim);font-size:.78rem;line-height:1.5}.framework-boundary strong{color:var(--text)}.relativity-stage-card{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(280px,.75fr);background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.relativity-stage-wrap{min-height:480px;position:relative;background:radial-gradient(circle at 50% 25%,var(--accent-soft),transparent 60%),var(--surface-2)}.relativity-stage-wrap canvas{width:100%;height:100%;position:absolute;top:0;right:0;bottom:0;left:0}.relativity-stage-wrap canvas{cursor:grab;touch-action:none}.relativity-stage-wrap canvas:active{cursor:grabbing}.stage-3d-hint{position:absolute;right:14px;bottom:12px;padding:6px 9px;border-radius:8px;background:color-mix(in srgb,var(--surface) 84%,transparent);color:var(--text-dim);font-size:.68rem;pointer-events:none}.vector-readout{padding:9px;border-radius:8px;background:var(--surface-2);font-size:.72rem;color:var(--text-dim)}.vector-readout strong{display:block;color:var(--text);margin-top:3px}.stage-legend{position:absolute;left:16px;top:14px;display:flex;gap:14px;font-size:.75rem;color:var(--text-dim)}.stage-legend span{display:flex;align-items:center;gap:5px}.legend-dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}.legend-dot.light{background:#ffd34d}.legend-dot.event{background:#ef6b73}.relativity-controls{padding:20px;border-left:1px solid var(--border);display:flex;flex-direction:column;gap:15px}.control-title,.play-row{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}.control-title span{font-size:.75rem;color:var(--success)}.relativity-controls label{display:grid;grid-template-columns:1fr auto;gap:6px;font-size:.8rem;color:var(--text-dim)}.relativity-controls label input,.relativity-controls label select{grid-column:1/-1;width:100%}.relativity-controls output{color:var(--text);font-weight:700}.preset-row{display:grid;grid-template-columns:repeat(5,1fr);gap:5px}.preset-row button{border:1px solid var(--border);background:var(--surface-2);color:var(--text);border-radius:7px;padding:7px 2px;cursor:pointer;font-size:.7rem}.preset-row button:hover{border-color:var(--accent)}.play-row label{display:flex;align-items:center;gap:6px}.play-row label select{width:auto}.relativity-readouts{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}.relativity-readouts article,.experiment-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:15px}.relativity-readouts span,.relativity-readouts small{display:block;color:var(--text-dim);font-size:.72rem}.relativity-readouts strong{display:block;font-size:1.05rem;margin:6px 0;overflow-wrap:anywhere}.relativity-readouts small{line-height:1.35}.relativity-analysis-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.experiment-panel h3{margin:0 0 10px}.experiment-panel p{color:var(--text-dim);line-height:1.55}.cause-chain{display:flex;align-items:stretch;gap:8px;flex-wrap:wrap}.cause-chain span{background:var(--surface-2);padding:9px;border-radius:8px;font-size:.76rem;display:grid;gap:3px}.cause-chain i{align-self:center;color:var(--accent)}.event-track{height:38px;position:relative;background:linear-gradient(90deg,transparent,var(--accent-soft),transparent);border-bottom:2px solid var(--border);margin:18px 0}.event-track i{position:absolute;bottom:-7px;width:12px;height:12px;border-radius:50%;background:#ef6b73;transform:translate(-50%)}.spectrum{height:18px;border-radius:99px;background:linear-gradient(90deg,#6d3fea,#258cff,#34c98a,#f1d044,#f38b32,#e74343);position:relative;margin:24px 0}.spectrum i{position:absolute;top:-6px;width:3px;height:30px;background:var(--text);box-shadow:0 0 0 2px var(--surface);transform:translate(-50%)}.invariant-row{display:flex;gap:8px;flex-wrap:wrap}.invariant-row span{background:var(--surface-2);border-radius:8px;padding:8px;font-size:.78rem}.experiment-notes{border-left:4px solid var(--accent)}.experiment-caution{font-size:.8rem;border-top:1px solid var(--border);padding-top:12px}@media(max-width:900px){.object-workbench-grid{grid-template-columns:1fr}.object-list{display:grid;grid-template-columns:repeat(3,1fr)}.object-editor{grid-template-columns:repeat(3,1fr)}.relativity-stage-card{grid-template-columns:1fr}.relativity-stage-wrap{min-height:400px}.relativity-controls{border-left:0;border-top:1px solid var(--border)}.relativity-readouts{grid-template-columns:repeat(3,1fr)}}@media(max-width:600px){.admin-test-area-entry{align-items:flex-start;flex-direction:column}.object-list,.object-editor{grid-template-columns:1fr 1fr}.object-editor label:nth-child(4),.object-editor label:nth-child(5){grid-column:span 2}.relativity-analysis-grid{grid-template-columns:1fr}.relativity-readouts{grid-template-columns:repeat(2,1fr)}.relativity-stage-wrap{min-height:340px}}.model-check-results{display:flex;flex-direction:column;gap:8px;margin-top:14px}.model-check-results:empty{display:none}.model-check-row{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:10px;border:1px solid var(--border);background:var(--surface-2);font-size:.85rem}.model-check-row .mc-icon{width:20px;height:20px;border-radius:50%;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:700;color:#fff;line-height:1}.model-check-row.ok{border-color:var(--success)}.model-check-row.ok .mc-icon{background:var(--success)}.model-check-row.fail{border-color:var(--danger)}.model-check-row.fail .mc-icon{background:var(--danger)}.model-check-row .mc-slot{font-weight:600;flex-shrink:0}.model-check-row .mc-model{color:var(--text-dim);font-size:.8rem;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.model-check-row .mc-detail{margin-left:auto;text-align:right;color:var(--text-dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:55%}.model-check-row.ok .mc-detail{color:var(--success)}.model-check-row.fail .mc-detail{color:var(--danger);white-space:normal}.icon-btn{background:none;border:none;cursor:pointer;color:var(--text-dim);padding:4px;border-radius:6px}.icon-btn:hover{background:var(--surface-2);color:var(--text)}.toast{position:fixed;bottom:20px;right:20px;background:var(--text);color:var(--bg);padding:12px 18px;border-radius:10px;box-shadow:var(--shadow);z-index:200;font-size:.88rem}.viewing-paywall{max-width:420px;margin:0 auto}.viewing-paywall h3{margin:10px 0 8px}.viewing-paywall p{margin:0 0 16px;line-height:1.55}.viewing-paywall .btn{text-decoration:none}@media(max-width:768px){.course-layout{flex-direction:column}.tree-rail{width:100%;border-right:none;border-bottom:1px solid var(--border);max-height:240px;transition:max-height .18s ease,padding .18s ease}.tree-rail.rail-collapsed{width:100%;max-height:0;padding-top:0;padding-bottom:0;border-bottom:none}.rail-toggle-btn{width:100%;height:16px;border-right:none;border-bottom:1px solid var(--border)}.studio-body{flex-direction:column}.splitter{display:none}.chat-pane,.preview-pane{width:100%!important;height:50%}}.mkt-page{width:100%;min-height:100vh;display:flex;flex-direction:column}.btn-lg{padding:13px 24px;font-size:1rem;border-radius:12px}.mkt-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--surface) 92%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}.mkt-header-inner{max-width:1180px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:24px}.mkt-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;font-family:var(--font-serif);text-decoration:none;color:var(--text)}.mkt-brand .logo{width:38px;height:38px;border-radius:11px;background:var(--accent);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.mkt-nav{display:flex;gap:22px;margin:0 auto}.mkt-nav-link{color:var(--text-dim);text-decoration:none;font-weight:600;font-size:.92rem;padding:6px 2px;border-bottom:2px solid transparent}.mkt-nav-link:hover,.mkt-nav-link.is-active{color:var(--text);border-bottom-color:var(--accent)}.mkt-header-actions{flex-shrink:0}.mkt-header-actions .btn{text-decoration:none}.mkt-nav-toggle{display:none;border:1px solid var(--border);background:var(--surface);border-radius:8px;padding:6px 10px;font-size:1rem;cursor:pointer}.mkt-main{flex:1;width:100%}.mkt-section{max-width:1180px;margin:0 auto;padding:64px 24px}.mkt-section-alt{max-width:none;background:var(--surface-2)}.mkt-section-alt>*{max-width:1180px;margin-left:auto;margin-right:auto}.mkt-section-head{text-align:center;max-width:620px;margin:0 auto 36px}.mkt-section-head h2{font-size:1.9rem;margin-bottom:8px}.mkt-section-head p{color:var(--text-dim);margin:0}.mkt-hero-zone{position:relative;overflow:hidden}.mkt-hero-zone>.mkt-hero,.mkt-hero-zone>#sim-gallery{position:relative;z-index:1}.mkt-float-section{position:relative;overflow:hidden}.mkt-float-section>*:not(.mkt-float-layer){position:relative;z-index:1}.mkt-float-layer{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden;pointer-events:none;z-index:0}.mkt-bubble{position:absolute;top:108%;left:var(--bx, 50%);width:var(--bs, 28px);height:var(--bs, 28px);font-size:var(--bs, 28px);line-height:1;font-weight:600;color:var(--accent);opacity:0;-webkit-user-select:none;user-select:none;display:flex;align-items:center;justify-content:center;animation:bubble-float var(--bd, 24s) ease-in-out infinite;animation-delay:var(--bdelay, 0s);will-change:top,transform,opacity}.mkt-bubble svg{width:100%;height:100%;display:block}.mkt-float-layer-light .mkt-bubble{color:#fff}@keyframes bubble-float{0%{top:108%;transform:translate(0) rotate(0) scale(.92);opacity:0}10%{opacity:var(--bo, .28)}30%{top:74%;transform:translate(calc(var(--bdrift, 1) * 16px)) rotate(calc(var(--bspin, 1) * 10deg)) scale(1.02)}55%{top:46%;transform:translate(calc(var(--bdrift, 1) * -14px)) rotate(calc(var(--bspin, 1) * -8deg)) scale(.97);opacity:var(--bo, .28)}80%{top:16%;transform:translate(calc(var(--bdrift, 1) * 18px)) rotate(calc(var(--bspin, 1) * 9deg)) scale(1.03)}92%{opacity:var(--bo, .28)}to{top:-12%;transform:translate(calc(var(--bdrift, 1) * -6px)) rotate(0) scale(.9);opacity:0}}@media(prefers-reduced-motion:reduce){.mkt-bubble{animation:none;opacity:calc(var(--bo, .28) * .7);top:45%}}.mkt-hero{max-width:780px;margin:0 auto;padding:76px 24px 56px;text-align:center}.mkt-hero-badges{display:flex;gap:8px;justify-content:center;margin-bottom:18px}.mkt-hero h1{font-size:clamp(2rem,5vw,3.1rem);line-height:1.12;margin:0 0 18px}.mkt-hero-sub{color:var(--text-dim);font-size:1.1rem;line-height:1.6;max-width:620px;margin:0 auto 30px}.mkt-hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.mkt-hero-actions .btn{text-decoration:none}.mkt-page-hero{max-width:720px;margin:0 auto;padding:60px 24px 20px;text-align:center}.mkt-page-hero h1{font-size:clamp(1.8rem,4vw,2.6rem);margin-bottom:10px}.mkt-page-hero p{color:var(--text-dim);font-size:1.05rem;margin:0}.mkt-page-hero-legal p{font-size:.85rem}.sim-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}.sim-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .15s ease,border-color .15s ease}.sim-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 40%,var(--border))}.sim-visual{position:relative;height:160px;overflow:hidden;background:var(--surface-2)}.sim-card-body{padding:16px 18px 20px}.sim-field-pill{margin-bottom:8px;color:var(--accent-2);background:var(--accent-soft);font-weight:700}.sim-card-body h3{margin:0 0 6px;font-size:1.05rem}.sim-card-body p{margin:0;color:var(--text-dim);font-size:.86rem;line-height:1.5}.sim-physics{background:radial-gradient(circle at 50% 6%,var(--accent-soft),transparent 60%)}.pendulum{position:absolute;top:0;right:0;bottom:0;left:0}.pendulum-arc{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.arc-guide{fill:none;stroke:var(--border);stroke-width:1.4;stroke-dasharray:2 5;stroke-linecap:round;opacity:.8}.pendulum-pivot{position:absolute;top:9px;left:50%;width:9px;height:9px;margin-left:-4.5px;border-radius:50%;background:var(--text-dim);box-shadow:0 0 0 3px var(--surface-2);z-index:3}.pendulum-arm{position:absolute;top:13px;left:50%;width:2px;height:108px;margin-left:-1px;background:linear-gradient(var(--text-dim),color-mix(in srgb,var(--text-dim) 55%,transparent));transform-origin:top center;animation:swing 2.6s ease-in-out infinite alternate}.pendulum-bob{position:absolute;bottom:-13px;left:50%;width:26px;height:26px;margin-left:-13px;border-radius:50%;background:radial-gradient(circle at 34% 30%,color-mix(in srgb,var(--accent) 60%,#fff),var(--accent) 62%,var(--accent-2));box-shadow:0 5px 12px #0000002e}.pendulum-arm.ghost{animation-name:swing;opacity:.5}.pendulum-arm.ghost .pendulum-bob{box-shadow:none}.pendulum-arm.g1{opacity:.28;animation-delay:-.08s}.pendulum-arm.g2{opacity:.14;animation-delay:-.16s}@keyframes swing{0%{transform:rotate(-30deg)}to{transform:rotate(30deg)}}.sim-chemistry{display:flex;align-items:center;justify-content:center}.h2o{position:relative;width:130px;height:118px;animation:h2o-bend 3.6s ease-in-out infinite}.h2o .bond{position:absolute;left:50%;bottom:26px;width:5px;height:48px;margin-left:-2.5px;border-radius:3px;background:color-mix(in srgb,var(--text-dim) 60%,var(--surface));transform-origin:bottom center}.h2o .bond-l{transform:rotate(-52.25deg)}.h2o .bond-r{transform:rotate(52.25deg)}.h2o .atom-o{position:absolute;left:50%;bottom:12px;width:40px;height:40px;margin-left:-20px;border-radius:50%;background:radial-gradient(circle at 34% 30%,color-mix(in srgb,var(--accent-2) 55%,#fff),var(--accent-2) 66%,color-mix(in srgb,var(--accent-2) 70%,#000));box-shadow:0 4px 10px #00000029;z-index:2}.h2o .atom-h{position:absolute;width:26px;height:26px;border-radius:50%;background:radial-gradient(circle at 34% 30%,#fff,#e6e2d6 70%,#cdc7b6);box-shadow:0 3px 8px #00000024;z-index:2}.h2o .atom-h-l{left:6px;top:10px}.h2o .atom-h-r{right:6px;top:10px}.h2o b{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;letter-spacing:-.5px}.h2o .atom-o b{color:#fff}.h2o .atom-h b{color:var(--text-dim);font-size:11px}.h2o .angle-arc{position:absolute;left:50%;bottom:30px;width:34px;height:34px;margin-left:-17px;border:1.4px solid var(--accent);border-bottom-color:transparent;border-radius:50%;opacity:.5}.h2o .angle-label{position:absolute;left:50%;bottom:2px;transform:translate(-50%);font-size:10px;font-weight:700;color:var(--accent-2);background:color-mix(in srgb,var(--surface) 82%,transparent);padding:1px 5px;border-radius:6px;white-space:nowrap}@keyframes h2o-bend{0%,to{transform:scale(1) rotate(-1.4deg)}50%{transform:scale(1.03) rotate(1.4deg)}}.sim-biology{display:flex;align-items:center;justify-content:center;overflow:hidden}.mitosis{position:relative;width:150px;height:120px}.mitosis .membrane{position:absolute;top:50%;left:50%;width:84px;height:84px;margin:-42px 0 0 -42px;border-radius:50%;background:radial-gradient(circle at 50% 45%,color-mix(in srgb,var(--accent-soft) 80%,transparent),color-mix(in srgb,var(--accent-soft) 40%,transparent));border:2px solid color-mix(in srgb,var(--accent) 70%,transparent);animation:mito-membrane 6s ease-in-out infinite}.mitosis .spindle{position:absolute;top:50%;width:46px;height:1.4px;background:repeating-linear-gradient(90deg,var(--text-dim) 0 4px,transparent 4px 8px);opacity:0;animation:mito-spindle 6s ease-in-out infinite}.mitosis .spindle-l{right:50%;transform-origin:right center}.mitosis .spindle-r{left:50%;transform-origin:left center}.mitosis .chromo{position:absolute;top:50%;left:50%;width:8px;height:20px;margin:-10px 0 0 -4px;border-radius:4px;background:var(--accent-2);box-shadow:inset 0 0 0 1px color-mix(in srgb,#000 20%,transparent)}.mitosis .chromo:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:4px;background:inherit;transform:rotate(52deg)}.mitosis .c1{animation:mito-c1 6s ease-in-out infinite}.mitosis .c2{animation:mito-c2 6s ease-in-out infinite}.mitosis .c3{animation:mito-c3 6s ease-in-out infinite}.mitosis .c4{animation:mito-c4 6s ease-in-out infinite}@keyframes mito-membrane{0%,18%{width:84px;height:84px;margin:-42px 0 0 -42px;border-radius:50%}45%{width:120px;height:78px;margin:-39px 0 0 -60px;border-radius:50%}72%,to{width:140px;height:66px;margin:-33px 0 0 -70px;border-radius:50%/60%;clip-path:polygon(0 0,42% 0,50% 42%,58% 0,100% 0,100% 100%,58% 100%,50% 58%,42% 100%,0 100%)}}@keyframes mito-spindle{0%,30%{opacity:0;width:10px}45%{opacity:.7}60%{width:52px;opacity:.7}80%,to{opacity:0;width:52px}}@keyframes mito-c1{0%,12%{transform:translate(-26px,-16px) rotate(20deg)}30%{transform:translate(-2px,-13px) rotate(0)}60%,to{transform:translate(-42px,-12px) rotate(-14deg)}}@keyframes mito-c2{0%,12%{transform:translate(24px,-20px) rotate(-24deg)}30%{transform:translate(-2px,13px) rotate(0)}60%,to{transform:translate(38px,-12px) rotate(14deg)}}@keyframes mito-c3{0%,12%{transform:translate(-20px,18px) rotate(-14deg)}30%{transform:translate(-2px,-13px) rotate(0)}60%,to{transform:translate(-42px,12px) rotate(12deg)}}@keyframes mito-c4{0%,12%{transform:translate(28px,14px) rotate(30deg)}30%{transform:translate(-2px,13px) rotate(0)}60%,to{transform:translate(38px,12px) rotate(-12deg)}}.sim-math{display:flex;align-items:center;justify-content:center;padding:12px}.graph-svg{width:100%;height:100%}.graph-grid line{stroke:var(--border);stroke-width:1;opacity:.5}.graph-grid .axis{stroke:color-mix(in srgb,var(--text-dim) 55%,transparent);stroke-width:1.2;opacity:.9}.graph-line{fill:none;stroke:var(--accent);stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:100;stroke-dashoffset:100;animation:draw-line 4s linear infinite}@keyframes draw-line{0%{stroke-dashoffset:100}78%,to{stroke-dashoffset:0}}.graph-dot{fill:var(--accent-2);filter:drop-shadow(0 0 3px color-mix(in srgb,var(--accent-2) 60%,transparent))}.sim-astronomy{display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 76% 50%,color-mix(in srgb,var(--warning, #d97706) 12%,transparent),transparent 55%)}.orbit-svg{width:100%;height:100%}.orbit-path{fill:none;stroke:var(--border);stroke-width:1.2;stroke-dasharray:3 5}.star{fill:var(--warning, #d97706);opacity:.4;animation:star-pulse 3.5s ease-in-out infinite;transform-origin:122px 50px}.star-core{r:5;fill:#fbbf24;filter:drop-shadow(0 0 5px var(--warning, #d97706))}.planet{fill:var(--accent);filter:drop-shadow(0 0 4px color-mix(in srgb,var(--accent) 55%,transparent))}@keyframes star-pulse{0%,to{transform:scale(1);opacity:.35}50%{transform:scale(1.18);opacity:.5}}.sim-circuit{display:flex;align-items:center;justify-content:center;padding:14px}.circuit-svg{width:100%;height:100%}.circuit-wire{fill:none;stroke:var(--border);stroke-width:3;stroke-linejoin:round}.circuit-flow{fill:none;stroke:var(--accent);stroke-width:3;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:6 9;opacity:.85;animation:flow 1s linear infinite}@keyframes flow{to{stroke-dashoffset:-30}}.cell-long,.cell-long-plate{stroke:var(--text);stroke-width:2.4;stroke-linecap:round}.cell-short-plate{stroke:var(--text);stroke-width:4;stroke-linecap:round}.resistor{fill:none;stroke:var(--text-dim);stroke-width:2.4;stroke-linejoin:round;stroke-linecap:round}.lamp-glow{fill:color-mix(in srgb,var(--warning, #d97706) 55%,transparent);animation:lamp 1s ease-in-out infinite}.lamp{fill:color-mix(in srgb,var(--warning, #fbbf24) 30%,var(--surface));stroke:var(--text-dim);stroke-width:1.6}.lamp-filament{stroke:var(--warning, #d97706);stroke-width:1.6;stroke-linecap:round;fill:none}.charge{fill:var(--accent-2)}@keyframes lamp{0%,to{opacity:.35;r:8}50%{opacity:.75;r:10}}.audience-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}.audience-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}.audience-card h3{margin-top:0}.audience-card ul{margin:0;padding-left:20px;color:var(--text-dim);line-height:1.8}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}.feature-card{text-align:center;padding:20px}.feature-icon{font-size:2rem;margin-bottom:10px}.feature-card h3{margin:0 0 6px;font-size:1.02rem}.feature-card p{margin:0;color:var(--text-dim);font-size:.88rem;line-height:1.55}.mkt-cta-band{position:relative;overflow:hidden;background:var(--accent);color:#fff;text-align:center;padding:64px 24px}.mkt-cta-inner{position:relative;z-index:1}.mkt-cta-band h2{margin:0 0 8px;color:#fff}.mkt-cta-band p{margin:0 0 22px;opacity:.9}.mkt-cta-band .btn-primary{background:#fff;color:var(--accent-2)}.mkt-cta-band .btn-primary:hover{background:#fff;opacity:.92}.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px;align-items:stretch}.pricing-card{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);display:flex;flex-direction:column}.pricing-card.is-highlight{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft),var(--shadow)}.pricing-badge{position:absolute;top:-12px;left:50%;transform:translate(-50%);background:var(--accent);color:#fff;font-weight:700}.pricing-card h3{margin:4px 0 2px}.pricing-tagline{margin:0 0 16px;color:var(--text-dim);font-size:.85rem}.pricing-price{display:flex;align-items:baseline;gap:4px;margin-bottom:18px}.pricing-price .amount{font-family:var(--font-serif);font-size:2.2rem;font-weight:700}.pricing-price .period{color:var(--text-dim);font-size:.85rem}.pricing-features{list-style:none;margin:0 0 22px;padding:0;display:flex;flex-direction:column;gap:10px;color:var(--text-dim);font-size:.9rem;flex:1}.pricing-cta{text-decoration:none;justify-content:center}.pricing-note{text-align:center;color:var(--text-dim);font-size:.85rem;margin-top:28px}.faq-list{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:10px}.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 18px}.faq-item summary{cursor:pointer;font-weight:600}.faq-item p{margin:10px 0 0;color:var(--text-dim);font-size:.9rem;line-height:1.6}.contact-grid{display:grid;grid-template-columns:minmax(220px,.8fr) minmax(280px,1.2fr);gap:32px;max-width:900px;margin:0 auto;align-items:start}.contact-info{display:flex;flex-direction:column;gap:18px;padding-top:6px}.contact-info-row{display:flex;flex-direction:column;gap:3px}.contact-info-label{font-size:.75rem;text-transform:uppercase;letter-spacing:.04em;color:var(--text-dim)}.contact-form{cursor:default}.contact-form-note{margin:10px 0 0;font-size:.78rem;color:var(--text-dim)}.mkt-prose{max-width:760px}.mkt-prose h2{margin-top:30px;font-size:1.25rem}.mkt-prose h2:first-child{margin-top:0}.mkt-prose p,.mkt-prose li{color:var(--text-dim);line-height:1.7}.mkt-prose ul{padding-left:20px}.mkt-footer{border-top:1px solid var(--border);background:var(--surface);margin-top:auto}.mkt-footer-inner{max-width:1180px;margin:0 auto;padding:48px 24px 28px;display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:28px}.mkt-footer-brand p{color:var(--text-dim);font-size:.85rem;margin:10px 0 0;max-width:240px}.mkt-footer-col h4{margin:0 0 12px;font-size:.82rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-dim)}.mkt-footer-col{display:flex;flex-direction:column;gap:9px}.mkt-footer-col a{color:var(--text);text-decoration:none;font-size:.9rem}.mkt-footer-col a:hover{color:var(--accent)}.mkt-footer-bottom{max-width:1180px;margin:0 auto;padding:18px 24px 28px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:.8rem;color:var(--text-dim);border-top:1px solid var(--border)}.mkt-footer-bottom a{color:var(--text-dim)}@media(max-width:860px){.mkt-nav{position:absolute;top:100%;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);flex-direction:column;gap:0;padding:6px 0;display:none}.mkt-nav.is-open{display:flex}.mkt-nav-link{padding:12px 24px;border-bottom:none}.mkt-nav-toggle{display:block}.mkt-header-inner{position:relative}.contact-grid{grid-template-columns:1fr}}@media(max-width:640px){.mkt-footer-inner{grid-template-columns:1fr 1fr}}