:root{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-bg: #ffffff;--color-bg-secondary: #f8fafc;--color-text: #0f172a;--color-text-muted: #64748b;--color-border: #e2e8f0;--color-error: #dc2626;--color-success: #16a34a;--radius: 8px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--color-text);background:var(--color-bg);line-height:1.6}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;border:none;border-radius:var(--radius);padding:.5rem 1rem;font-size:.875rem;font-weight:500}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-hover)}.btn-secondary{background:var(--color-bg-secondary);color:var(--color-text);border:1px solid var(--color-border)}.container{max-width:1024px;margin:0 auto;padding:0 1rem}.card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius);padding:1.5rem}input,textarea{border:1px solid var(--color-border);border-radius:var(--radius);padding:.5rem .75rem;font-size:.875rem;width:100%}input:focus,textarea:focus{outline:2px solid var(--color-primary);outline-offset:-1px}