*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f4f6f9;--surface: #ffffff;--border: #e2e6ea;--primary: #2563eb;--primary-hover: #1d4ed8;--text: #1a1a2e;--muted: #6b7280;--danger: #dc2626;--success-bg: #d1fae5;--success-text: #065f46;--error-bg: #fee2e2;--error-text: #991b1b;--sidebar-w: 220px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}body{background:var(--bg);color:var(--text)}.btn{padding:8px 16px;border-radius:6px;border:none;cursor:pointer;font-size:14px;font-weight:500;transition:background .15s}.btn.primary{background:var(--primary);color:#fff}.btn.primary:hover:not(:disabled){background:var(--primary-hover)}.btn.primary:disabled{opacity:.6;cursor:not-allowed}.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--border)}.btn.ghost:hover{background:var(--bg)}.btn.icon-btn{border:none;padding:6px 10px;font-size:16px}.alert{padding:10px 14px;border-radius:6px;font-size:14px;margin-bottom:12px}.alert.error{background:var(--error-bg);color:var(--error-text)}.alert.success{background:var(--success-bg);color:var(--success-text)}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}.auth-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:40px;width:100%;max-width:400px}.auth-card h1{font-size:24px;margin-bottom:4px}.auth-sub{color:var(--muted);font-size:14px;margin-bottom:24px}.auth-card form{display:flex;flex-direction:column;gap:16px}.auth-card label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:500}.auth-card input{padding:10px 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;outline:none}.auth-card input:focus{border-color:var(--primary)}.auth-link{margin-top:16px;font-size:13px;color:var(--muted);text-align:center}.auth-link a{color:var(--primary);text-decoration:none}.username-field{display:flex;align-items:center;border:1px solid var(--border);border-radius:6px;overflow:hidden}.username-field:focus-within{border-color:var(--primary)}.username-field input{flex:1;border:none;border-radius:0}.username-field input:focus{border-color:transparent}.username-domain{padding:10px 12px;font-size:14px;color:var(--muted);background:var(--bg);white-space:nowrap}.field-hint{font-size:12px;font-weight:400;color:var(--muted)}.field-hint.ok{color:var(--success-text)}.field-hint.bad{color:var(--error-text)}.install-banner{position:fixed;top:16px;left:50%;transform:translate(-50%);z-index:100;display:flex;align-items:center;gap:16px;background:var(--surface);border:1px solid var(--border);border-radius:10px;box-shadow:0 4px 16px #0000001a;padding:14px 18px;max-width:calc(100vw - 32px)}.install-banner-text{display:flex;flex-direction:column;gap:2px}.install-banner-text strong{font-size:14px}.install-banner-text 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12px;margin-top:8px}.install-sidebar-btn-wrap{position:relative}.install-sidebar-btn{width:100%}.install-instructions-popover{position:absolute;bottom:calc(100% + 8px);left:0;right:0;background:var(--surface);border:1px solid var(--border);border-radius:8px;box-shadow:0 4px 16px #0000001f;padding:12px;z-index:50;display:flex;flex-direction:column;gap:8px}.install-instructions-popover p{font-size:12px;color:var(--text)}.app-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:var(--sidebar-w);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:20px 16px;gap:16px;flex-shrink:0}.sidebar-logo{font-size:18px;font-weight:700;padding:4px 0 8px}.compose-btn{width:100%}nav{display:flex;flex-direction:column;gap:4px;flex:1}.nav-item{padding:8px 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24px}.stat-value{font-size:32px;font-weight:700;color:var(--primary)}.stat-label{font-size:13px;color:var(--muted);margin-top:4px}.admin-section{margin-bottom:32px}.admin-section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:12px}.admin-section-header h2{font-size:18px;font-weight:600;display:flex;align-items:center;gap:8px}.search-form{display:flex;gap:8px}.search-form input{padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;outline:none;width:240px}.search-form input:focus{border-color:var(--primary)}.recent-emails h3{font-size:15px;font-weight:600;margin-bottom:12px}.admin-table{width:100%;border-collapse:collapse;font-size:14px;background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden}.admin-table th{background:var(--bg);padding:10px 14px;text-align:left;font-weight:600;font-size:13px;color:var(--muted);border-bottom:1px solid var(--border)}.admin-table td{padding:12px 14px;border-bottom:1px solid var(--border);vertical-align:middle}.admin-table tr:last-child td{border-bottom:none}.admin-table tr:hover td{background:#f8fafc}.admin-table td.num{text-align:center;font-weight:600}.admin-table td.actions{display:flex;gap:8px}.btn.danger{background:var(--error-bg);color:var(--danger);border:1px solid #fca5a5}.btn.danger:hover{background:#fecaca}.btn.sm{padding:5px 10px;font-size:12px}.form-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:28px;max-width:480px}.form-card form{display:flex;flex-direction:column;gap:16px}.form-card label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:500}.form-card input{padding:10px 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;outline:none}.form-card input:focus{border-color:var(--primary)}@media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr)}.list-panel{width:100%;border-right:none}.email-pane{display:none}.email-pane.has-email{display:flex;position:fixed;top:0;right:0;bottom:0;left:0;z-index:50}}