:root{--bg:#f7f7f8;--surface:#ffffff;--surface-2:#f0f0f2;--border:#e4e4e7;--border-strong:#cfcfd6;--text:#18181b;--text-muted:#71717a;--text-subtle:#a1a1aa;--primary:#18181b;--primary-foreground:#ffffff;--accent:#1f7a44;--danger:#b91c1c;--warn:#b45309;--success:#166534;--radius:8px;--radius-sm:6px;--shadow-sm:0 1px 2px rgba(0,0,0,0.05);--shadow:0 4px 12px rgba(0,0,0,0.06);--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);font-family:var(--font);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}a,body,html{color:var(--text)}a{text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;font-size:inherit;cursor:pointer}.app-shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.sidebar{background:var(--surface);border-right:1px solid var(--border);padding:24px 16px;display:flex;flex-direction:column;gap:16px}.sidebar h1{font-size:16px;font-weight:600;margin:0 0 8px}.sidebar nav{display:flex;flex-direction:column;gap:2px}.sidebar nav a{padding:8px 12px;border-radius:var(--radius-sm);color:var(--text-muted);font-size:14px}.sidebar nav a:hover{text-decoration:none}.sidebar nav a.active,.sidebar nav a:hover{background:var(--surface-2);color:var(--text)}.sidebar nav a.active{font-weight:500}.main{padding:32px 40px;min-width:0}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;gap:16px;flex-wrap:wrap}.page-title{font-size:22px;font-weight:600;margin:0}.page-subtitle{color:var(--text-muted);margin-top:4px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm)}.card+.card{margin-top:16px}.card h2{font-size:16px;font-weight:600;margin:0 0 12px}.card .row{display:flex;gap:12px}.btn,.card .row{align-items:center}.btn{display:inline-flex;gap:6px;padding:8px 14px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--surface);color:var(--text);font-weight:500;font-size:13px;transition:background .12s ease}.btn:hover{background:var(--surface-2);text-decoration:none}.btn[disabled]{opacity:.5;cursor:not-allowed}.btn.primary{background:var(--primary);color:var(--primary-foreground);border-color:var(--primary)}.btn.primary:hover{background:#27272a}.btn.danger{color:var(--danger);border-color:#fecaca}.btn.sm{padding:4px 10px;font-size:12px}input[type=email],input[type=text],input[type=url],select,textarea{width:100%;padding:8px 10px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);font-family:inherit;font-size:13px;color:var(--text)}input:focus,select:focus,textarea:focus{outline:2px solid var(--text);outline-offset:-1px}label{font-size:12px;font-weight:500;color:var(--text-muted);display:block;margin-bottom:4px}.field{margin-bottom:14px}.table{width:100%;border-collapse:collapse}.table td,.table th{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border);font-size:13px}.table th{font-weight:600;color:var(--text-muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}.table th,.table tr:hover td{background:var(--surface-2)}.status-pill{display:inline-block;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:500;text-transform:uppercase;letter-spacing:.05em}.status-pill.new{background:#e0e7ff;color:#3730a3}.status-pill.valid{background:#dcfce7;color:var(--success)}.status-pill.qualified{background:#cffafe;color:#155e75}.status-pill.invalid{background:#fee2e2;color:var(--danger)}.status-pill.duplicate{background:#f1f5f9;color:#475569}.code{padding:2px 6px;border-radius:4px}.code,.code-block{font-family:var(--font-mono);font-size:12px;background:var(--surface-2)}.code-block{padding:12px;border-radius:var(--radius-sm);white-space:pre;overflow-x:auto;border:1px solid var(--border)}.muted{color:var(--text-muted)}.danger-text{color:var(--danger)}.small{font-size:12px}.empty-state{padding:48px 24px;text-align:center;color:var(--text-muted)}.auth-shell{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px}