:root{--background: #1e1e1e;--on-background: #ffffff;--surface: #2d2d2d;--on-surface: #ffffff;--primary: #4a90e2;--on-primary: #ffffff;--border: #444444;--sidebar-width: 256px;--error: #ba1a1a;--error-bg: #ffdad6;--on-error-bg: #93000a;font-family:Inter,sans-serif;box-sizing:border-box}*,*:before,*:after{box-sizing:inherit}body{margin:0;padding:0;background-color:var(--background);color:var(--on-background);height:100vh;width:100vw;overflow:hidden;display:flex}#root{display:flex;height:100%;width:100%}.glass{background:#2d2d2db3;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1)}.sidebar{width:var(--sidebar-width);height:100%;border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;background-color:var(--surface);padding:16px;gap:16px;overflow-y:auto;transition:width .3s ease,padding .3s ease,border-color .3s ease}.sidebar.collapsed{width:0;padding:16px 0;border-right-color:transparent}.main-content{flex:1;display:flex;flex-direction:column;height:100%;position:relative}.header{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 24px;border-bottom:1px solid var(--border);background-color:var(--surface)}.rendering-pane{flex:1;padding:24px;overflow:hidden;display:flex;flex-direction:column}.iframe-container{flex:1;background-color:#fff;border-radius:8px;overflow:hidden;box-shadow:0 4px 6px #0000004d}iframe{border:none;width:100%;height:100%}.input-group{display:flex;gap:8px;flex-direction:column}.input-group label{font-size:12px;color:#aaa}.input-row{display:flex;gap:8px}input[type=text]{flex:1;padding:8px 12px;border-radius:4px;border:1px solid var(--border);background:#111;color:#fff;outline:none}input[type=text]:focus{border-color:var(--primary)}button{background-color:var(--primary);color:var(--on-primary);border:none;border-radius:4px;padding:8px 16px;cursor:pointer;font-weight:500;transition:opacity .2s}button:hover{opacity:.9}.nav-section{display:flex;flex-direction:column;gap:8px}.nav-section h3{font-size:12px;text-transform:uppercase;color:#aaa;margin:0;display:flex;align-items:center;gap:8px}.nav-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:4px}.nav-item{display:flex;align-items:center;gap:8px;padding:8px;border-radius:6px;color:#ddd;text-decoration:none;cursor:pointer;font-size:14px}.nav-item:hover,.nav-item.active{background-color:#ffffff1a;color:var(--primary)}.metadata-card{background:#ffffff0d;border:1px solid var(--border);border-radius:6px;padding:12px;display:flex;flex-direction:column;gap:8px}.metadata-row{display:flex;justify-content:space-between;font-size:13px}.metadata-label{color:#aaa}.error-banner{background-color:var(--error-bg);color:var(--on-error-bg);padding:12px 24px;display:flex;align-items:center;gap:12px;font-weight:500}.tabs-container{display:flex;gap:4px;padding:8px 24px 0;background-color:var(--surface);border-bottom:1px solid var(--border);overflow-x:auto}.tab{padding:8px 16px;background:#ffffff0d;border:1px solid var(--border);border-bottom:none;border-radius:6px 6px 0 0;cursor:pointer;color:#aaa;display:flex;align-items:center;gap:8px;white-space:nowrap}.tab.active{background:#fff;color:#111;border-color:#fff}.tab-close{background:transparent;color:inherit;padding:2px;margin:0;border-radius:50%;display:flex;align-items:center;justify-content:center}.tab-close:hover{background:#0000001a}