:root{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-success: #16a34a;--color-success-bg: #f0fdf4;--color-error: #dc2626;--color-error-bg: #fef2f2;--color-bg: #f8fafc;--color-surface: #ffffff;--color-border: #e2e8f0;--color-text: #1e293b;--color-text-secondary: #64748b;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6}.container{max-width:960px;margin:0 auto;padding:2rem 1rem}h1,h2,h3{line-height:1.2}button{cursor:pointer;font-size:.875rem;font-weight:500;padding:.5rem 1rem;border:none;border-radius:var(--radius);transition:background-color .2s}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-hover)}.btn-secondary{background:var(--color-border);color:var(--color-text)}input,select{padding:.5rem .75rem;border:1px solid var(--color-border);border-radius:var(--radius);font-size:.875rem;width:100%}input:focus,select:focus{outline:2px solid var(--color-primary);outline-offset:-1px}table{width:100%;border-collapse:collapse;background:var(--color-surface);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}th,td{padding:.75rem 1rem;text-align:left;border-bottom:1px solid var(--color-border)}th{background:var(--color-bg);font-weight:600;font-size:.8rem;text-transform:uppercase;color:var(--color-text-secondary)}.card{background:var(--color-surface);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow)}.alert{padding:.75rem 1rem;border-radius:var(--radius);font-size:.875rem;margin-bottom:1rem}.alert-success{background:var(--color-success-bg);color:var(--color-success);border:1px solid var(--color-success)}.alert-error{background:var(--color-error-bg);color:var(--color-error);border:1px solid var(--color-error)}