:root{--bg-base:#0a0a0c;--bg-elev-1:#14141a;--bg-elev-2:#1c1c24;--border:#2a2a35;--border-strong:#3a3a48;--fg-primary:#e8e8ec;--fg-secondary:#a8a8b3;--fg-muted:#6a6a78;--accent:#4a9eff;--accent-hover:#6db0ff;--positive:#2dd4a4;--negative:#ef5d5d;--warn:#f5a623;--header-h:56px}*{box-sizing:border-box;padding:0;margin:0}html{color-scheme:dark}body,html{max-width:100vw;overflow-x:hidden}body{background:var(--bg-base);color:var(--fg-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Apple SD Gothic Neo,Malgun Gothic,sans-serif;font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{text-decoration:none}a,button{color:inherit}button{font:inherit;background:transparent;border:0;cursor:pointer}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{position:-webkit-sticky;position:sticky;top:0;z-index:10;height:var(--header-h);background:var(--bg-elev-1);border-bottom:1px solid var(--border);display:flex;align-items:stretch;padding:0 24px}.app-header__brand{display:flex;align-items:center;font-weight:600;font-size:16px;color:var(--fg-primary);letter-spacing:.2px;margin-right:32px}.app-header__brand-mark{display:inline-block;width:8px;height:8px;border-radius:2px;background:var(--accent);margin-right:10px}.app-tabs{display:flex;align-items:stretch;gap:4px}.app-tabs__link{display:flex;align-items:center;padding:0 16px;color:var(--fg-secondary);font-size:14px;font-weight:500;border-bottom:2px solid transparent;transition:color .12s ease,border-color .12s ease}.app-tabs__link:hover{color:var(--fg-primary)}.app-tabs__link--active{color:var(--fg-primary);border-bottom-color:var(--accent)}.app-main{flex:1 1;padding:24px;max-width:1400px;width:100%;margin:0 auto}.placeholder{background:var(--bg-elev-1);border:1px solid var(--border);border-radius:8px;padding:48px 32px;text-align:center;margin-top:32px}.placeholder__title{font-size:20px;font-weight:600;margin-bottom:8px;color:var(--fg-primary)}.placeholder__desc{color:var(--fg-secondary);font-size:14px}.placeholder__phase{display:inline-block;margin-top:12px;padding:4px 10px;background:var(--bg-elev-2);border:1px solid var(--border);border-radius:4px;font-size:12px;color:var(--fg-muted);font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace}@media (max-width:900px){.app-header{padding:0 16px}.app-header__brand{margin-right:16px}.app-tabs__link{padding:0 12px;font-size:13px}.app-main{padding:16px}}