:root{--primary-color: #1a5276;--primary-hover: #123d5c;--success-color: #27ae60;--warning-color: #f39c12;--danger-color: #c0392b;--info-color: #2980b9;--text-color: #2c3e50;--text-muted: #7f8c8d;--bg-color: #ecf0f1;--card-bg: #ffffff;--border-color: #d5d8dc;--shadow: 0 1px 2px rgba(0, 0, 0, .05);--shadow-lg: 0 2px 6px rgba(0, 0, 0, .1);--primary-action: #2471a3;--border-radius: 4px;--header-bg: #1a3c5e;--font-size-base: 13px;--font-size-sm: 12px;--font-size-xs: 11px}body{font-family:Segoe UI,-apple-system,BlinkMacSystemFont,Roboto,sans-serif;font-size:var(--font-size-base);line-height:1.5}.app-container{min-height:100vh;display:flex;flex-direction:column}.app-header{background:var(--header-bg);color:#fff;padding:.375rem .75rem;box-shadow:none;border-bottom:1px solid rgba(0,0,0,.2)}.header-content{max-width:1400px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}.header-left{display:flex;align-items:baseline;gap:1rem}.header-nav{display:flex;align-items:center;gap:1rem}.header-link{color:#ffffffd9;text-decoration:none;font-size:.85rem;opacity:.8;transition:opacity .15s ease}.header-link:hover{color:#fff;opacity:1}.app-title{font-size:1rem;font-weight:500;margin:0}.app-subtitle{font-size:.75rem;opacity:.8}.app-main{flex:1;padding:1rem;max-width:1400px;margin:0 auto;width:100%}.app-footer{background:var(--card-bg);border-top:1px solid var(--border-color);padding:.25rem .75rem;text-align:center;color:var(--text-muted);font-size:.6875rem}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.25rem .625rem;border-radius:3px;font-size:.875rem;font-weight:500;cursor:pointer;border:1px solid transparent;transition:background-color .15s ease;gap:.5rem}.btn-primary{background:var(--primary-color);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-success{background:var(--success-color);color:#fff}.btn-success:hover{background:#1e8449}.btn-danger{background:var(--danger-color);color:#fff}.btn-danger:hover{background:#a93226}.btn-outline{background:transparent;border:1px solid var(--border-color);color:var(--text-color)}.btn-outline:hover{background:var(--bg-color)}.card{background:var(--card-bg);border-radius:var(--border-radius);border:1px solid var(--border-color);overflow:hidden}.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem;gap:1rem;color:var(--text-muted)}.spinner{width:32px;height:32px;border:3px solid var(--border-color);border-top-color:var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-message{background:#fff5f5;border:1px solid #fed7d7;color:var(--danger-color);padding:1rem;border-radius:var(--border-radius);margin:1rem 0}html.embed-mode .app-header,html.embed-mode .app-footer{display:none}html.embed-mode .app-main{padding:.75rem;max-width:none}html.embed-mode .app-container{min-height:auto}html.embed-mode,html.embed-mode body{overflow:auto;height:100%}[data-panel-size=compact] .message-preview{display:none}[data-panel-size=compact] .stats-bar{flex-direction:column;gap:.25rem}