:root{--bg-dark: #0f172a;--sidebar-bg: #1e293b;--editor-bg: #1e1e1e;--border: #334155;--accent: #8b5cf6;--text-main: #f1f5f9;--text-muted: #94a3b8}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,sans-serif;background-color:var(--bg-dark);color:var(--text-main);height:100vh;overflow:hidden}.app-layout{display:flex;flex-direction:column;height:100vh}.navbar{height:50px;background:var(--sidebar-bg);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 15px;flex-shrink:0}.brand{font-weight:800;color:#fff;display:flex;align-items:center;font-size:1.1rem}.pro-badge{font-size:.6rem;background:#334155;padding:2px 6px;border-radius:4px;margin-left:10px;color:#38bdf8}.workspace{display:flex;flex:1;overflow:hidden}.sidebar{width:350px;background:var(--bg-dark);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:15px;flex-shrink:0}.chat-log{flex:1;overflow-y:auto;margin-bottom:10px;padding-right:5px}.chat-input-area{background:var(--sidebar-bg);padding:10px;border-radius:12px;border:1px solid var(--border)}.input-actions{display:flex;justify-content:space-between;margin-bottom:8px}textarea.prompt-input{width:100%;background:#0f172a;border:1px solid var(--border);color:#fff;padding:10px;border-radius:8px;resize:none;font-family:inherit;margin-bottom:10px;outline:none;height:80px}textarea.prompt-input:focus{border-color:var(--accent)}.btn-primary{background:var(--accent);color:#fff;border:none;padding:12px;border-radius:6px;font-weight:600;cursor:pointer;width:100%;transition:opacity .2s}.btn-primary:hover{opacity:.9}.main-window{flex:1;display:flex;flex-direction:column;background:#000;overflow:hidden}.tabs-header{height:45px;background:var(--sidebar-bg);display:flex;justify-content:space-between;align-items:center;padding:0 10px;border-bottom:1px solid var(--border)}.content-viewer{flex:1;background:#111;display:flex;justify-content:center;align-items:center;overflow:hidden;position:relative}iframe.preview-frame{background:#fff;border:none;width:100%;height:100%}@media(max-width:768px){.workspace{flex-direction:column-reverse}.sidebar{width:100%;height:45%;border-right:none;border-top:1px solid var(--border)}.main-window{height:55%}textarea.prompt-input{height:50px}.chat-log,.tech-toggle{display:none}}