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4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-5: 24px;--sp-6: 32px;--sp-7: 48px;--font-sans: "Inter", "Segoe UI", Arial, sans-serif;--font-mono: "IBM Plex Mono", "Consolas", monospace}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:var(--font-sans);font-size:14px;line-height:1.5;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}h1,h2,h3{font-family:var(--font-sans);font-weight:800;letter-spacing:-.01em}button{font-family:inherit}input,textarea,select{font-family:inherit;font-size:13px;padding:7px 9px;border:1px solid var(--rule-strong);border-radius:0;background:var(--paper);color:var(--ink)}input:focus,textarea:focus,select:focus{outline:2px solid var(--accent);outline-offset:-1px}.app-shell{display:flex;flex-direction:column;height:100%}.app-topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:var(--ink);color:var(--paper);border-bottom:3px solid var(--accent)}.app-title{font-weight:700;font-size:14px;text-transform:uppercase;letter-spacing:.08em}.app-title:before{content:"";display:inline-block;width:9px;height:9px;background:var(--accent);margin-right:12px;vertical-align:middle}.logout-btn{background:transparent;border:1px solid rgba(255,255,255,.4);color:var(--paper);padding:6px 14px;border-radius:0;cursor:pointer;font-size:12px;text-transform:uppercase;letter-spacing:.06em}.logout-btn:hover{background:var(--accent);border-color:var(--accent)}.tab-bar{display:flex;align-items:center;gap:2px;background:var(--paper);padding:0 20px;overflow-x:auto;border-bottom:1px solid var(--rule-strong)}.tab-bar-spacer{flex:1}.tab-btn{padding:13px 16px 11px;border:none;border-bottom:3px solid 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