:root{--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-secondary: #64748b;--color-success: #22c55e;--color-warning: #f59e0b;--color-error: #ef4444;--color-bg: #f8fafc;--color-surface: #ffffff;--color-text: #1e293b;--color-text-muted: #64748b;--color-border: #e2e8f0;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--radius: .5rem}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.card{background:var(--color-surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.625rem 1.25rem;font-size:.875rem;font-weight:500;border-radius:var(--radius);border:none;cursor:pointer;transition:all .15s ease}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-dark)}.btn-secondary{background:var(--color-secondary);color:#fff}.btn-secondary:hover{opacity:.9}.btn:disabled{opacity:.5;cursor:not-allowed}.form-group{margin-bottom:1rem}.form-label{display:block;font-size:.875rem;font-weight:500;margin-bottom:.375rem;color:var(--color-text)}.form-input{width:100%;padding:.625rem .75rem;font-size:.875rem;border:1px solid var(--color-border);border-radius:var(--radius);transition:border-color .15s ease,box-shadow .15s ease}.form-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1a}.form-input.error{border-color:var(--color-error)}.form-error{font-size:.75rem;color:var(--color-error);margin-top:.25rem}.alert{padding:.75rem 1rem;border-radius:var(--radius);margin-bottom:1rem}.alert-success{background:#22c55e1a;color:#166534;border:1px solid rgb(34 197 94 / .2)}.alert-error{background:#ef44441a;color:#991b1b;border:1px solid rgb(239 68 68 / .2)}.alert-warning{background:#f59e0b1a;color:#92400e;border:1px solid rgb(245 158 11 / .2)}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:.75rem;text-align:left;border-bottom:1px solid var(--color-border)}.table th{font-weight:600;font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted)}.table tbody tr:hover{background:var(--color-bg)}.badge{display:inline-flex;align-items:center;padding:.125rem .5rem;font-size:.75rem;font-weight:500;border-radius:9999px}.badge-pending{background:#f59e0b1a;color:#92400e}.badge-confirmed{background:#22c55e1a;color:#166534}.badge-opted_out{background:#64748b1a;color:#475569}.pagination{display:flex;gap:.5rem;justify-content:center;margin-top:1.5rem}.pagination a,.pagination span{padding:.5rem .75rem;border-radius:var(--radius);font-size:.875rem}.pagination a{background:var(--color-surface);border:1px solid var(--color-border)}.pagination a:hover{background:var(--color-bg);text-decoration:none}.pagination .active{background:var(--color-primary);color:#fff}