:root{--bg: #0f1419;--bg-elevated: #1a2332;--bg-hover: #243044;--border: #2d3a4f;--text: #e8edf4;--text-muted: #8b9cb3;--accent: #3b82f6;--accent-hover: #2563eb;--danger: #ef4444;--success: #22c55e;--radius: 12px;--shadow: 0 8px 32px rgba(0, 0, 0, .35)}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:DM Sans,system-ui,sans-serif;background:radial-gradient(ellipse 120% 80% at 50% -20%,#1e3a5f 0%,var(--bg) 55%);color:var(--text);-webkit-font-smoothing:antialiased}#root{min-height:100vh}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;cursor:pointer}input{font-family:inherit}.app-shell{min-height:100vh;display:flex;flex-direction:column}.auth-page{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-card{width:100%;max-width:420px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}.auth-logo{display:flex;align-items:center;gap:12px;margin-bottom:8px}.auth-logo-icon{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--accent),#6366f1);display:grid;place-items:center;font-weight:700;font-size:18px}.auth-title{margin:0;font-size:1.5rem;font-weight:700}.auth-subtitle{margin:0 0 28px;color:var(--text-muted);font-size:.95rem}.form-group{margin-bottom:18px}.form-group label{display:block;margin-bottom:6px;font-size:.875rem;font-weight:500;color:var(--text-muted)}.form-group input{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);font-size:1rem;transition:border-color .15s}.form-group input:focus{outline:none;border-color:var(--accent)}.email-hint{margin-top:6px;font-size:.8rem;color:var(--text-muted)}.email-hint strong{color:var(--accent)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border:none;border-radius:8px;font-size:.95rem;font-weight:600;transition:background .15s,transform .1s}.btn:active{transform:scale(.98)}.btn-primary{width:100%;background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-ghost{background:transparent;color:var(--text-muted);border:1px solid var(--border)}.btn-ghost:hover{background:var(--bg-hover);color:var(--text)}.error-banner{margin-bottom:16px;padding:12px 14px;border-radius:8px;background:#ef44441f;border:1px solid rgba(239,68,68,.35);color:#fca5a5;font-size:.875rem}.auth-footer{margin-top:24px;text-align:center;font-size:.875rem;color:var(--text-muted)}.inbox-layout{display:grid;grid-template-columns:320px 1fr;min-height:100vh}@media(max-width:900px){.inbox-layout{grid-template-columns:1fr}.inbox-layout.message-open .sidebar{display:none}}.sidebar{border-right:1px solid var(--border);background:var(--bg-elevated);display:flex;flex-direction:column;min-height:100vh}.sidebar-header{padding:20px;border-bottom:1px solid var(--border)}.sidebar-user{font-size:.85rem;color:var(--text-muted);word-break:break-all}.sidebar-user strong{display:block;color:var(--text);font-size:1rem;margin-bottom:4px}.sidebar-actions{display:flex;gap:8px;margin-top:16px}.sidebar-actions .btn{flex:1;padding:8px 12px;font-size:.8rem}.message-list{flex:1;overflow-y:auto}.message-list-empty{padding:40px 20px;text-align:center;color:var(--text-muted)}.message-item{display:block;width:100%;text-align:left;padding:16px 20px;border:none;border-bottom:1px solid var(--border);background:transparent;color:inherit;transition:background .12s}.message-item:hover{background:var(--bg-hover)}.message-item.active{background:var(--bg-hover);border-left:3px solid var(--accent)}.message-item.unread .message-item-subject{font-weight:700}.message-item-subject{font-size:.95rem;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.message-item-from{font-size:.8rem;color:var(--text-muted);margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.message-item-preview{font-size:.8rem;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.message-item-date{font-size:.75rem;color:var(--text-muted);margin-top:6px}.message-panel{display:flex;flex-direction:column;min-height:100vh}.message-panel-empty{flex:1;display:grid;place-items:center;color:var(--text-muted);padding:40px}.message-header{padding:24px 32px;border-bottom:1px solid var(--border);background:#1a233299}.message-header h1{margin:0 0 12px;font-size:1.35rem;line-height:1.35}.message-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:.875rem;color:var(--text-muted)}.message-meta span strong{color:var(--text)}.message-body{flex:1;padding:32px;overflow-y:auto;line-height:1.6;white-space:pre-wrap;word-break:break-word}.message-body-frame{flex:1;display:block;width:100%;min-height:320px;border:none;background:#fff}.retention-notice{margin:16px 20px;padding:10px 12px;border-radius:8px;background:#3b82f61a;border:1px solid rgba(59,130,246,.25);font-size:.78rem;color:var(--text-muted)}.loading{padding:40px;text-align:center;color:var(--text-muted)}