:root{--color-background: #ffffff;--color-text: #1a1a1a;--color-text-muted: #595959;--color-border: #e0e0e0;--color-surface: #f7f7f7;--color-link: #1a1a1a;--max-width: 1100px;--header-height: 64px;--font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;color-scheme:light}*,*:before,*:after{box-sizing:border-box}*{margin:0}html,body,#root{height:100%}body{font-family:var(--font-sans);line-height:1.5;background-color:var(--color-background);color:var(--color-text);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}img,picture,svg,video{display:block;max-width:100%}input,button,textarea,select{font:inherit;color:inherit}a{color:var(--color-link);text-decoration:none}a:hover{text-decoration:underline}.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}.app-shell{display:flex;flex-direction:column;min-height:100%}.app-main{flex:1 0 auto;padding:3rem 0}.app-header{border-bottom:1px solid var(--color-border);background-color:var(--color-background)}.app-header__inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-height)}.app-header__brand{font-weight:700;font-size:1.25rem;letter-spacing:.05em}.app-header__nav{display:flex;gap:1.25rem}.app-header__nav a{color:var(--color-text-muted);font-weight:500;text-decoration:none}.app-header__nav a:hover,.app-header__nav a.active{color:var(--color-text)}.app-footer{border-top:1px solid var(--color-border);background-color:var(--color-surface);color:var(--color-text-muted);font-size:.875rem}.app-footer__inner{height:var(--header-height);display:flex;align-items:center}.page{display:flex;flex-direction:column;gap:1rem}.page--centered{align-items:center;text-align:center;padding-top:2rem}.page__title{font-size:2rem;font-weight:700}.page__lead{max-width:60ch;color:var(--color-text-muted)}.page__error-code{font-size:4rem;font-weight:800;color:var(--color-text-muted)}.button{display:inline-block;margin-top:.5rem;padding:.625rem 1.25rem;border:1px solid var(--color-border);border-radius:.5rem;background-color:var(--color-surface);color:var(--color-text);font-weight:600;text-decoration:none}.button:hover{background-color:var(--color-border);text-decoration:none}