:root{--bg: #0f1117;--bg-secondary: #1a1d28;--bg-tertiary: #252836;--text: #e4e6f0;--text-muted: #8b8fa3;--border: #2d3042;--accent: #5b8def;--accent-hover: #4a7de0;--success: #4ade80;--warning: #fbbf24;--danger: #ef4444;--radius: 8px;--sidebar-width: 280px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}.app-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}.sidebar-header{padding:16px;border-bottom:1px solid var(--border)}.sidebar-header h1{font-size:18px;font-weight:600}.sidebar-header .subtitle{font-size:12px;color:var(--text-muted);margin-top:2px}.inbox-list{list-style:none;padding:8px;flex:1;overflow-y:auto}.inbox-item{padding:10px 12px;border-radius:var(--radius);cursor:pointer;transition:background .15s;display:flex;align-items:center;gap:10px}.inbox-item:hover{background:var(--bg-tertiary)}.inbox-item.active{background:var(--bg-tertiary);border-left:3px solid var(--accent)}.inbox-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}.inbox-name{font-size:14px;font-weight:500}.inbox-email{font-size:12px;color:var(--text-muted)}.main-area{flex:1;display:flex;flex-direction:column;overflow:hidden}.main-header{padding:12px 20px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.main-header h2{font-size:16px;font-weight:600}.logout-btn{background:none;border:1px solid var(--border);color:var(--text-muted);padding:6px 14px;border-radius:var(--radius);cursor:pointer;font-size:13px;transition:all .15s}.logout-btn:hover{border-color:var(--danger);color:var(--danger)}.thread-list{flex:1;overflow-y:auto}.thread-row{padding:14px 20px;border-bottom:1px solid var(--border);cursor:pointer;transition:background .15s}.thread-row:hover{background:var(--bg-secondary)}.thread-row.unread{border-left:3px solid var(--accent)}.thread-from{font-size:14px;font-weight:600}.thread-subject{font-size:13px;color:var(--text-muted);margin-top:2px}.thread-preview{font-size:13px;color:var(--text-muted);margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.thread-meta{display:flex;justify-content:space-between;align-items:center}.thread-time{font-size:12px;color:var(--text-muted)}.thread-view{flex:1;overflow-y:auto;padding:20px}.message{background:var(--bg-secondary);border-radius:var(--radius);padding:16px;margin-bottom:12px;border:1px solid var(--border)}.message-header{display:flex;justify-content:space-between;margin-bottom:10px;font-size:13px}.message-from{font-weight:600}.message-date{color:var(--text-muted)}.message-body{font-size:14px;line-height:1.6;color:var(--text)}.message-body p{margin-bottom:10px}.message-body blockquote{border-left:3px solid var(--accent);padding-left:12px;color:var(--text-muted);margin:10px 0}.compose-form{display:flex;flex-direction:column;gap:12px;padding:20px}.compose-form input,.compose-form select,.compose-form textarea{background:var(--bg-secondary);border:1px solid var(--border);color:var(--text);padding:10px 14px;border-radius:var(--radius);font-size:14px;font-family:inherit}.compose-form textarea{min-height:200px;resize:vertical}.compose-form input:focus,.compose-form select:focus,.compose-form textarea:focus{outline:none;border-color:var(--accent)}.btn{padding:10px 20px;border-radius:var(--radius);border:none;font-size:14px;font-weight:500;cursor:pointer;transition:all .15s}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.login-container{display:flex;align-items:center;justify-content:center;min-height:100vh}.login-box{background:var(--bg-secondary);border:1px solid var(--border);border-radius:12px;padding:40px;width:100%;max-width:400px}.login-box h1{font-size:24px;margin-bottom:8px;text-align:center}.login-box p{color:var(--text-muted);text-align:center;margin-bottom:24px}.login-box input{width:100%;padding:12px 16px;background:var(--bg);border:1px solid var(--border);color:var(--text);border-radius:var(--radius);font-size:14px;margin-bottom:16px}.login-box input:focus{outline:none;border-color:var(--accent)}.login-box button{width:100%;padding:12px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-size:15px;font-weight:500;cursor:pointer;transition:background .15s}.login-box button:hover{background:var(--accent-hover)}.error-msg{background:#ef44441a;border:1px solid var(--danger);color:var(--danger);padding:10px;border-radius:var(--radius);margin-bottom:16px;font-size:13px;text-align:center}.loading{display:flex;align-items:center;justify-content:center;padding:40px;color:var(--text-muted)}.empty-state{display:flex;align-items:center;justify-content:center;padding:60px 20px;color:var(--text-muted);text-align:center}.htmx-indicator{opacity:0;transition:opacity .3s}.htmx-request .htmx-indicator,.htmx-request.htmx-indicator{opacity:1}.spinner{display:inline-block;width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:768px){.sidebar{display:none}.sidebar.open{display:flex;position:fixed;inset:0;z-index:100}}