:root{--font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;--color-bg: #fafafa;--color-bg-alt: #ffffff;--color-text: #1a1a1a;--color-text-muted: #666666;--color-border: #e5e5e5;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-error: #dc2626;--color-success: #16a34a}@media(prefers-color-scheme:dark){:root{--color-bg: #0a0a0a;--color-bg-alt: #171717;--color-text: #fafafa;--color-text-muted: #a3a3a3;--color-border: #262626;--color-primary: #3b82f6;--color-primary-hover: #60a5fa}}*,*:before,*:after{box-sizing:border-box}html{font-family:var(--font-sans);background-color:var(--color-bg);color:var(--color-text);line-height:1.5}body{margin:0;min-height:100vh}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;font-size:1rem;padding:.5rem 1rem;border:none;border-radius:.375rem;cursor:pointer;background-color:var(--color-primary);color:#fff;transition:background-color .15s}button:hover{background-color:var(--color-primary-hover)}button:disabled{opacity:.5;cursor:not-allowed}input,textarea{font-family:inherit;font-size:1rem;padding:.5rem .75rem;border:1px solid var(--color-border);border-radius:.375rem;background-color:var(--color-bg-alt);color:var(--color-text);width:100%}input:focus,textarea:focus{outline:2px solid var(--color-primary);outline-offset:2px}.container{max-width:1200px;margin:0 auto;padding:1rem}.card{background-color:var(--color-bg-alt);border:1px solid var(--color-border);border-radius:.5rem;padding:1.5rem}.error{color:var(--color-error)}.success{color:var(--color-success)}.muted{color:var(--color-text-muted)}