:root{--bg:#f9fafb;--surface:#fff;--border:#e5e7eb;--text-main:#111827;--text-muted:#6b7280;--primary:#2563eb;--primary-hover:#1d4ed8;--danger:#ef4444;--danger-hover:#dc2626;--focus-ring:#2563eb33}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg);color:var(--text-main);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.layout{height:100vh;display:flex;overflow:hidden}.sidebar{background-color:var(--surface);border-right:1px solid var(--border);flex-direction:column;width:250px;padding:1.5rem 1rem;display:flex}.sidebar-title{margin-bottom:2rem;padding:0 .5rem;font-size:1.25rem;font-weight:600}.nav-link{color:var(--text-main);border-radius:.375rem;padding:.5rem .75rem;font-weight:500;text-decoration:none;display:block}.nav-link:hover,.nav-link.active{background-color:var(--bg);text-decoration:none}.main-content{flex-direction:column;flex:1;display:flex;overflow-y:auto}.header{background-color:var(--surface);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;height:64px;padding:0 2rem;display:flex}.page-content{width:100%;max-width:1200px;margin:0 auto;padding:2rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:.5rem;overflow:hidden}.btn{cursor:pointer;border:1px solid #0000;border-radius:.375rem;justify-content:center;align-items:center;padding:.5rem 1rem;font-size:.875rem;font-weight:500;transition:all .15s;display:inline-flex}.btn:focus{box-shadow:0 0 0 3px var(--focus-ring);outline:none}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-danger{color:var(--danger);border-color:var(--danger);background-color:#fff}.btn-danger:hover{background-color:var(--danger);color:#fff}.btn-secondary{color:var(--text-main);border-color:var(--border);background-color:#fff}.btn-secondary:hover{background-color:var(--bg)}.email-list{border-collapse:collapse;width:100%}.email-list th{text-align:left;border-bottom:1px solid var(--border);color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;padding:.75rem 1rem;font-size:.75rem}.email-row{cursor:pointer;border-bottom:1px solid var(--border)}.email-row:hover{background-color:var(--bg)}.email-row td{padding:1rem;font-size:.875rem}.email-row.unread{background-color:#2563eb05;font-weight:600}.badge{border-radius:9999px;align-items:center;padding:.125rem .5rem;font-size:.75rem;font-weight:500;display:inline-flex}.badge-blue{color:#1e40af;background:#dbeafe}.badge-gray{color:#374151;background:#f3f4f6}.text-muted{color:var(--text-muted)}.message-header{border-bottom:1px solid var(--border);padding:1.5rem}.message-meta{grid-template-columns:max-content 1fr;gap:.5rem 1rem;margin-top:1rem;font-size:.875rem;display:grid}.message-body{white-space:pre-wrap;padding:1.5rem;font-family:inherit;font-size:.875rem;line-height:1.6}