*,:after,:before{box-sizing:border-box}body,html{margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#111827;background:#f3f4f6}button{font:inherit}.lock-screen{display:grid;min-height:100vh;place-items:center;padding:20px}.lock-card{width:min(520px,100%);padding:24px;border:1px solid #d1d5db;border-radius:14px;background:#ffffff;box-shadow:0 24px 46px -36px rgba(17,24,39,.9)}.lock-title{margin:0;font-size:1.2rem}.lock-copy{margin:10px 0 0;color:#374151}.lock-hint{margin:8px 0 0;font-size:.84rem;color:#6b7280}.lock-form{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.lock-input{flex:1 1 240px;min-width:0;padding:10px 12px;border:1px solid #d1d5db;border-radius:8px}.lock-submit{padding:10px 14px;border:1px solid #1d4ed8;border-radius:8px;background:#2563eb;color:#ffffff;cursor:pointer}.lock-submit:hover{background:#1d4ed8}.lock-error{margin:10px 0 0;font-size:.86rem;color:#b91c1c}.viewer-shell{display:grid;grid-template-columns:420px minmax(0,1fr);height:100vh;overflow:hidden}.sidebar{padding:20px 14px;border-right:1px solid #e5e7eb;background:#ffffff;overflow-y:auto}.sidebar-title{margin:0;font-size:1rem;font-weight:700}.template-list{display:grid;gap:10px;margin-top:14px}.template-button{display:grid;gap:4px;width:100%;padding:10px 12px;text-align:left;border:1px solid #e5e7eb;border-radius:8px;background:#ffffff;cursor:pointer}.template-button:hover{border-color:#9ca3af}.template-button.is-selected{border-color:#1d4ed8;background:#eff6ff}.template-button-id{font-size:.86rem;font-weight:600}.preview-section{display:flex;flex-direction:column;min-width:0;min-height:0;overflow:hidden}.preview-header{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px 22px;border-bottom:1px solid #e5e7eb;background:#ffffff}.preview-controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.variant-select-group{display:grid;gap:4px;min-width:200px}.variant-select-label{font-size:.72rem;font-weight:600;color:#4b5563;text-transform:uppercase;letter-spacing:.03em}.variant-select{padding:8px 10px;border:1px solid #d1d5db;border-radius:8px;background:#ffffff;color:#111827}.template-meta{min-width:0}.template-name{margin:0;font-size:1rem;font-weight:700;word-break:break-word}.template-subject{margin:5px 0 0;font-size:.84rem;color:#4b5563}.viewport-switcher{display:flex;gap:8px;margin:0;padding:4px;border:1px solid #e5e7eb;border-radius:10px;background:#f9fafb}.viewport-button{padding:6px 10px;border:1px solid transparent;border-radius:8px;background:transparent;color:#374151;cursor:pointer}.viewport-button.is-active{border-color:#dbeafe;background:#2563eb;color:#ffffff}.preview-workspace{display:flex;flex:1 1;min-height:0;align-items:flex-start;justify-content:center;padding:24px 30px 30px;overflow:auto}.email-client{max-width:100%;border:1px solid #d1d5db;border-radius:14px;background:#ffffff;overflow:hidden;box-shadow:0 20px 40px -32px rgba(17,24,39,.85);display:flex;flex-direction:column}.email-client-toolbar{display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1px solid #e5e7eb;background:linear-gradient(#f8fafc,#eef2f7)}.window-dot{width:11px;height:11px;border-radius:999px}.dot-red{background:#ef4444}.dot-yellow{background:#f59e0b}.dot-green{background:#22c55e}.window-title{margin:0 0 0 8px;font-size:.78rem;font-weight:600;color:#4b5563}.email-message-header{display:grid;gap:8px;padding:14px 18px 16px;border-bottom:1px solid #e5e7eb;background:#f9fafb}.email-subject{margin:0;font-size:1rem;font-weight:700;color:#111827}.email-address-row{display:grid;grid-template-columns:48px minmax(0,1fr);gap:8px}.address-label{font-size:.78rem;font-weight:600;color:#6b7280}.address-value{min-width:0;font-size:.8rem;color:#111827;word-break:break-word}.email-body-pane{flex:1 1;min-height:0;background:#ffffff}.preview-iframe{display:block;width:100%;height:100%;border:0;background:#ffffff}.empty-state{display:grid;min-height:100vh;place-items:center;text-align:center;gap:8px}.empty-state h1{margin:0;font-size:1.2rem}.empty-state p{margin:0;color:#4b5563}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}@media (max-width:960px){.viewer-shell{grid-template-columns:1fr}.sidebar{max-height:42vh;border-right:0;border-bottom:1px solid #e5e7eb}.preview-workspace{justify-content:flex-start}}