:root{--bg:#0b0d10;--surface:#14181d;--surface-2:#1b2027;--border:#2a313b;--border-strong:#3a424f;--text:#e6e9ee;--text-muted:#8a93a1;--primary:#5b8def;--primary-strong:#4a7be0;--success:#3ec483;--warning:#f1b04c;--danger:#ef5b6b;--radius:8px;--radius-sm:6px;--shadow:0 4px 16px rgba(0,0,0,0.4);--header-h:56px;--sidebar-w:220px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-size:14px;line-height:1.45;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button{font:inherit;cursor:pointer}.shell{display:grid;grid-template-columns:var(--sidebar-w) 1fr;grid-template-rows:var(--header-h) 1fr;grid-template-areas:"sidebar topbar" "sidebar main";height:100vh}.shell-sidebar{grid-area:sidebar;background:var(--surface);border-right:1px solid var(--border);padding:16px 12px;overflow-y:auto}.shell-topbar{grid-area:topbar;background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 20px}.shell-main{grid-area:main;overflow:auto;padding:24px 28px 64px}.brand{font-weight:700;letter-spacing:.5px;font-size:16px;margin-bottom:18px;align-items:center;gap:8px}.brand,.nav{display:flex}.nav{flex-direction:column;gap:2px}.nav-item{padding:8px 12px;border-radius:var(--radius-sm);color:var(--text);display:flex;align-items:center;gap:8px;font-size:13px}.nav-item:hover{background:var(--surface-2);text-decoration:none}.nav-item.active{background:var(--surface-2);color:var(--primary);font-weight:600}.nav-section{font-size:11px;text-transform:uppercase;color:var(--text-muted);letter-spacing:.06em;margin:16px 12px 6px}.page-header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}.page-title{font-size:20px;font-weight:700;margin:0}.page-subtitle{color:var(--text-muted);margin:4px 0 0;font-size:13px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:7px 14px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--surface-2);color:var(--text);font-size:13px;font-weight:500;transition:background .12s ease}.btn:hover{background:var(--border)}.btn-primary{background:var(--primary);border-color:var(--primary-strong);color:white}.btn-primary:hover{background:var(--primary-strong)}.btn-danger{background:var(--danger);border-color:var(--danger);color:white}.btn-danger:hover{filter:brightness(.92)}.btn-warning{background:rgba(241,176,76,.16);border-color:rgba(241,176,76,.5);color:var(--warning)}.btn-warning:hover{background:rgba(241,176,76,.24)}.btn-ghost{background:transparent;border-color:transparent;color:var(--text-muted)}.btn-ghost:hover{background:var(--surface-2);color:var(--text)}.btn-sm{padding:4px 10px;font-size:12px}.btn:disabled{opacity:.5;cursor:not-allowed}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.card+.card{margin-top:16px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));grid-gap:12px;gap:12px;margin-bottom:24px}.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px}.stat-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}.stat-value{font-size:26px;font-weight:700}.table-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}table.data{width:100%;border-collapse:collapse;font-size:13px}table.data td,table.data th{text-align:left;padding:10px 14px;border-bottom:1px solid var(--border);vertical-align:middle}table.data th{background:var(--surface-2);font-weight:600;color:var(--text-muted);text-transform:uppercase;font-size:11px;letter-spacing:.04em}table.data tr:last-child td{border-bottom:none}table.data tr:hover td{background:rgba(255,255,255,.02)}.form{display:flex;flex-direction:column;gap:14px;max-width:540px}.form-row{display:flex;gap:12px}.form-row>.field{flex:1 1}.field{display:flex;flex-direction:column;gap:5px}label{font-size:12px;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}input[type=email],input[type=number],input[type=password],input[type=text],input[type=url],select,textarea{background:var(--surface-2);border:1px solid var(--border-strong);color:var(--text);padding:8px 10px;border-radius:var(--radius-sm);font:inherit;width:100%;outline:none}input:focus,select:focus,textarea:focus{border-color:var(--primary)}textarea{min-height:120px;resize:vertical;font-family:ui-monospace,SFMono-Regular,monospace;font-size:13px}.checkbox{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text);text-transform:none;letter-spacing:normal;font-weight:400}.checkbox input{width:auto}.toolbar{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}.toolbar input,.toolbar select{width:auto;min-width:180px}.email-template-layout{display:grid;grid-template-columns:minmax(280px,340px) 1fr;grid-gap:18px;gap:18px;align-items:start}.email-template-preview,.email-template-sidebar{min-width:0}.email-template-list{display:flex;flex-direction:column;gap:8px;margin-top:12px}.email-template-item{width:100%;text-align:left;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:var(--radius);padding:12px}.email-template-item.active,.email-template-item:hover{border-color:var(--primary);background:var(--surface-2)}.email-template-item-meta,.email-template-item-title{display:block}.email-template-item-title{font-weight:650;margin-bottom:4px}.email-template-item-meta{color:var(--text-muted);font-size:12px}.email-template-preview{display:flex;flex-direction:column;gap:14px}.email-template-preview-header{display:flex;justify-content:space-between;gap:18px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.email-template-preview-header h2{margin:0;font-size:18px}.email-template-preview-header p{margin:6px 0 0;color:var(--text-muted)}.email-template-controls{display:flex;align-items:flex-start;gap:10px;flex-wrap:wrap;justify-content:flex-end}.segmented-control{display:flex;gap:4px;padding:4px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);flex-wrap:wrap}.segmented-control.compact{flex-wrap:nowrap}.segmented-control button{border:0;border-radius:var(--radius-sm);background:transparent;color:var(--text-muted);padding:6px 10px;font-size:12px;font-weight:600}.segmented-control button.active,.segmented-control button:hover{background:var(--surface-2);color:var(--text)}.email-subject{font-weight:650}.email-html-preview{width:100%;height:720px;background:white}.email-html-preview,.email-text-preview{border:1px solid var(--border);border-radius:var(--radius)}.email-text-preview{margin:0;min-height:420px;white-space:pre-wrap;overflow:auto;background:var(--surface);padding:16px;color:var(--text);font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:13px;line-height:1.6}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;background:var(--border);color:var(--text)}.badge-success{background:rgba(62,196,131,.15);color:var(--success)}.badge-warning{background:rgba(241,176,76,.15);color:var(--warning)}.badge-danger{background:rgba(239,91,107,.15);color:var(--danger)}.badge-muted{background:var(--border);color:var(--text-muted)}.badge-info{background:rgba(91,141,239,.15);color:var(--primary)}.state{text-align:center;padding:40px 20px;color:var(--text-muted)}.state strong{color:var(--text);display:block;margin-bottom:6px;font-size:15px}.error-banner{background:rgba(239,91,107,.1);border:1px solid var(--danger);color:var(--danger);padding:10px 14px;border-radius:var(--radius-sm);font-size:13px;margin-bottom:14px}.auth-screen{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-card{width:100%;max-width:380px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.auth-card h1{margin:0 0 4px;font-size:22px}.auth-card .muted{font-size:13px;margin:0 0 20px}.auth-card .muted,.muted{color:var(--text-muted)}.row,.row-end{display:flex;gap:8px;align-items:center}.row-end{justify-content:flex-end}.spacer{flex:1 1}.mono{font-family:ui-monospace,SFMono-Regular,monospace;font-size:12px}.detail-grid{display:grid;grid-template-columns:160px 1fr;grid-gap:8px 16px;gap:8px 16px;font-size:13px}.detail-grid dt{color:var(--text-muted);font-weight:500}.detail-grid dd{margin:0}.divider{height:1px;background:var(--border);margin:16px 0}.timeline{display:flex;flex-direction:column;gap:14px}.timeline-item{display:grid;grid-template-columns:12px 1fr;grid-gap:10px;gap:10px;align-items:start}.timeline-dot{width:10px;height:10px;border-radius:50%;margin-top:6px;background:var(--text-muted)}.timeline-dot.success{background:var(--success)}.timeline-dot.warning{background:var(--warning)}.timeline-dot.danger{background:var(--danger)}.section-title{font-size:13px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin:0 0 10px}@media (max-width:900px){.shell{grid-template-columns:1fr;grid-template-rows:auto var(--header-h) 1fr;grid-template-areas:"sidebar" "topbar" "main";height:auto;min-height:100vh}.shell-sidebar{border-right:0;border-bottom:1px solid var(--border)}.nav{flex-direction:row;flex-wrap:wrap}.email-template-layout,.email-template-preview-header{grid-template-columns:1fr;display:block}.email-template-preview{margin-top:16px}.email-template-controls{justify-content:flex-start;margin-top:14px}}