:root{--bg: #f5f7fb;--bg-elevated: #ffffff;--bg-panel: #eef2f8;--bg-input: #ffffff;--border: #e3e8f0;--border-strong: #cbd5e1;--text: #1e293b;--text-muted: #55627a;--text-dim: #8a97ad;--accent: #2563eb;--accent-strong: #1d4ed8;--accent-contrast: #ffffff;--success: #16a34a;--warning: #d97706;--danger: #dc2626;--radius: 10px;--radius-sm: 6px;--shadow: 0 1px 3px rgb(15 23 42 / 10%), 0 10px 28px rgb(15 23 42 / 7%);--font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;--mono: ui-monospace, SFMono-Regular, "Cascadia Code", Menlo, Consolas, monospace;color-scheme:light}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:var(--font);font-size:14px;line-height:1.5;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:600}h1{font-size:1.4rem}h2{font-size:1.1rem}h3{font-size:.95rem}p{margin:0 0 .75rem}code,pre,.mono{font-family:var(--mono);font-size:.85em}.app-shell{display:grid;grid-template-columns:232px 1fr;height:100vh;overflow:hidden}.sidebar{background:var(--bg-elevated);border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0}.sidebar-brand{display:flex;align-items:center;gap:.6rem;padding:1.1rem 1.15rem;border-bottom:1px solid var(--border);font-weight:700;letter-spacing:-.01em}.sidebar-brand .logo{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,var(--accent),#6366f1);display:grid;place-items:center;color:var(--accent-contrast);font-size:13px;font-weight:800;flex:none}.sidebar-brand small{display:block;font-weight:400;color:var(--text-dim);font-size:11px}.sidebar-nav{padding:.75rem 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.6rem;font-size:12px}.btn-row{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}label.field{display:block;margin-bottom:.85rem}label.field>span{display:block;margin-bottom:.3rem;font-size:12px;font-weight:500;color:var(--text-muted)}label.field .hint{display:block;margin-top:.25rem;font-size:11px;color:var(--text-dim);font-weight:400}input[type=text],input[type=password],input[type=email],input[type=search],select,textarea{width:100%;padding:.45rem .6rem;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--bg-input);color:var(--text);font:inherit}input:disabled,select:disabled,textarea:disabled{opacity:.6}textarea{min-height:72px;resize:vertical}.checkbox{display:inline-flex;align-items:center;gap:.45rem;cursor:pointer}.checkbox input{width:15px;height:15px;accent-color:var(--accent)}.field-error{color:var(--danger);font-size:12px;margin-top:.3rem}.card{background:var(--bg-elevated);border:1px solid 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.meta{color:var(--text-dim);font-size:12px;margin-top:.5rem;display:flex;gap:.75rem;flex-wrap:wrap}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:.6rem .7rem;border-bottom:1px solid var(--border);vertical-align:middle}th{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-dim);font-weight:600}tbody tr:hover{background:color-mix(in srgb,var(--accent) 5%,transparent)}td.actions{text-align:right;white-space:nowrap}.badge{display:inline-flex;align-items:center;gap:.3rem;padding:.14rem .5rem;border-radius:999px;font-size:11px;font-weight:600;border:1px solid transparent;white-space:nowrap}.badge-neutral{background:var(--bg-panel);color:var(--text-muted);border-color:var(--border-strong)}.badge-success{background:color-mix(in srgb,var(--success) 15%,transparent);color:var(--success);border-color:color-mix(in srgb,var(--success) 40%,transparent)}.badge-warning{background:color-mix(in srgb,var(--warning) 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h3{color:var(--text);margin-bottom:.4rem}.muted{color:var(--text-dim)}.small{font-size:12px}.nowrap{white-space:nowrap}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}.spread{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}.stack{display:flex;flex-direction:column;gap:.75rem}.inline{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}.callout{border:1px solid var(--border-strong);border-left:3px solid var(--accent);border-radius:var(--radius-sm);padding:.75rem .9rem;background:var(--bg-input)}.callout.warn{border-left-color:var(--warning)}.callout.danger{border-left-color:var(--danger)}pre.code-block{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);padding:.7rem .85rem;overflow-x:auto;margin:0}.login-shell{min-height:100vh;display:grid;place-items:center;padding:2rem;background:radial-gradient(circle at 25% 15%,#dbe6ff,var(--bg) 60%)}.login-card{width:100%;max-width:380px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:14px;padding:1.75rem;box-shadow:var(--shadow)}.login-card h1{margin-bottom:.25rem}.login-card .lead{color:var(--text-dim);margin-bottom:1.4rem;font-size:13px}.editor-shell{display:grid;grid-template-rows:auto 1fr;height:100%;min-height:0}.editor-toolbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem 1rem;border-bottom:1px solid var(--border);background:var(--bg-elevated);flex-wrap:wrap}.editor-toolbar .title{min-width:0}.editor-toolbar .title strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.editor-panes{display:grid;grid-template-columns:220px minmax(0,1fr) minmax(0,1fr);min-height:0;height:100%}.editor-panes.preview-hidden{grid-template-columns:220px minmax(0,1fr)}.pane{min-width:0;min-height:0;display:flex;flex-direction:column;border-right:1px solid var(--border)}.pane:last-child{border-right:0}.pane-head{display:flex;align-items:center;justify-content:space-between;gap:.5rem;padding:.45rem .7rem;border-bottom:1px solid var(--border);background:var(--bg-elevated);font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-dim);flex:none;min-height:34px}.pane-body{flex:1;min-height:0;overflow:auto}.file-tree{padding:.5rem}.file-tree .group-label{padding:.5rem .45rem .25rem;font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim)}.file-node{display:flex;align-items:center;gap:.45rem;width:100%;padding:.35rem .45rem;border:0;border-radius:var(--radius-sm);background:transparent;color:var(--text-muted);font:inherit;text-align:left;cursor:pointer}.file-node:hover{background:var(--bg-panel);color:var(--text)}.file-node.active{background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent);font-weight:600}.file-node .dot{width:6px;height:6px;border-radius:50%;background:var(--warning);flex:none}.file-node .ext{margin-left:auto;font-size:10px;color:var(--text-dim)}.editor-host{height:100%;min-height:0}.preview-frame{width:100%;height:100%;border:0;background:#fff;display:block}.unsaved-dot{width:7px;height:7px;border-radius:50%;background:var(--warning);display:inline-block}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#020617b3;display:grid;place-items:center;padding:1.5rem;z-index:50}.modal{width:100%;max-width:520px;max-height:85vh;overflow-y:auto;background:var(--bg-elevated);border:1px solid var(--border-strong);border-radius:12px;box-shadow:var(--shadow)}.modal.wide{max-width:820px}.modal-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem 1.15rem;border-bottom:1px solid var(--border)}.modal-body{padding:1.15rem}.modal-foot{display:flex;justify-content:flex-end;gap:.5rem;padding:.85rem 1.15rem;border-top:1px solid var(--border)}.toast-stack{position:fixed;right:1rem;bottom:1rem;display:flex;flex-direction:column;gap:.5rem;z-index:100;max-width:min(420px,calc(100vw - 2rem))}.toast{display:flex;align-items:flex-start;gap:.75rem;padding:.7rem .9rem;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--bg-panel);box-shadow:var(--shadow)}.toast button{border:0;background:transparent;color:inherit;font-size:18px;line-height:1;cursor:pointer;opacity:.6;flex:none}.toast button:hover{opacity:1}.toast-success{border-left:3px solid var(--success)}.toast-error{border-left:3px solid var(--danger)}.toast-info{border-left:3px solid var(--accent)}.loading-screen{min-height:100vh;display:grid;place-items:center;color:var(--text-dim)}.spinner{width:18px;height:18px;border:2px solid var(--border-strong);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.version-row.current{background:color-mix(in srgb,var(--accent) 7%,transparent)}.dropzone{border:1.5px dashed var(--border-strong);border-radius:var(--radius);padding:1.5rem;text-align:center;color:var(--text-muted);cursor:pointer;background:var(--bg-input)}.dropzone:hover,.dropzone.dragging{border-color:var(--accent);color:var(--text)}@media (max-width: 1100px){.editor-panes,.editor-panes.preview-hidden{grid-template-columns:180px minmax(0,1fr)}.editor-panes .pane.preview-pane{display:none}}@media (max-width: 760px){.app-shell{grid-template-columns:1fr}.sidebar{display:none}}