:root{--color-header-bg: linear-gradient(135deg, #0075BC 0%, #004B87 100%);--color-header-bg-start: #0075BC;--color-header-bg-end: #004B87;--color-header-text: #FFFFFF;--color-nav-bg: #F5F5F5;--color-nav-active: #FFFFFF;--color-nav-active-border: #0075BC;--color-nav-text: #333333;--color-nav-text-active: #0075BC;--color-body-bg: #FFFFFF;--color-section-bg: #F0F2F5;--color-primary: #0075BC;--color-primary-dark: #004B87;--color-primary-light: #E8F4FB;--color-success: #00875A;--color-success-light: #E3F7EE;--color-danger: #D32F2F;--color-danger-light: #FDECEA;--color-warning: #FF9800;--color-warning-light: #FFF3E0;--color-text-primary: #333333;--color-text-secondary: #757575;--color-border: #E0E0E0;--color-badge: #E53935;--color-card-bg: #FFFFFF;--color-sidebar-bg: #FFFFFF;--font-family: "Helvetica Neue", Arial, sans-serif;--font-xs: 12px;--font-sm: 13px;--font-base: 14px;--font-md: 16px;--font-lg: 18px;--font-xl: 22px;--font-xxl: 24px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 2px 8px rgba(0, 0, 0, .15)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:var(--font-family);font-size:var(--font-base);color:var(--color-text-primary);background:var(--color-section-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{height:100%;display:flex;flex-direction:column}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:var(--font-family)}input,textarea,select{font-family:var(--font-family)}.app-header{height:50px;background:linear-gradient(135deg,var(--color-header-bg-start) 0%,var(--color-header-bg-end) 100%);display:flex;align-items:center;justify-content:space-between;padding:0 20px;flex-shrink:0;z-index:100;box-shadow:0 2px 4px 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var(--color-border)}.nav-item:hover{background:#fff;color:var(--color-nav-text-active)}.nav-item--active{background:#fff;border-bottom-color:var(--color-nav-active-border);color:var(--color-nav-text-active);font-weight:600}.nav-item-inner{display:flex;flex-direction:column;align-items:center;gap:2px}.nav-icon-wrap{position:relative;display:flex;align-items:center;justify-content:center}.nav-badge{position:absolute;top:-6px;right:-8px;background:var(--color-badge);color:#fff;border-radius:10px;font-size:10px;font-weight:700;min-width:16px;height:16px;display:flex;align-items:center;justify-content:center;padding:0 3px;line-height:1}.nav-label{font-size:var(--font-xs)}.sidebar-overlay{position:fixed;inset:0;background:#0006;z-index:200}.sidebar{position:fixed;top:0;left:0;width:340px;height:100vh;background:var(--color-sidebar-bg);box-shadow:var(--shadow-md);z-index:201;display:flex;flex-direction:column;transform:translate(-100%);transition:transform .25s 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var(--color-border);border-radius:var(--radius-sm);font-size:var(--font-sm);color:var(--color-text-primary);background:#fff;outline:none;resize:vertical;min-height:80px;transition:border-color .15s;font-family:var(--font-family)}.form-textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px #0075bc1a}.toast{position:fixed;bottom:24px;right:24px;background:#333;color:#fff;padding:12px 20px;border-radius:var(--radius-md);font-size:var(--font-sm);box-shadow:var(--shadow-md);z-index:1000;animation:slideInUp .2s ease}.toast--success{background:var(--color-success)}@keyframes slideInUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.btn{border:none;border-radius:var(--radius-sm);padding:8px 16px;font-size:var(--font-sm);font-weight:600;cursor:pointer;transition:all 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var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);overflow:hidden}.messages-list-panel{width:360px;min-width:280px;border-right:1px solid var(--color-border);display:flex;flex-direction:column;background:var(--color-card-bg);flex-shrink:0}.messages-list-header{padding:12px 12px 0;border-bottom:1px solid var(--color-border)}.messages-search-wrap{position:relative;padding:10px 12px;border-bottom:1px solid var(--color-border)}.messages-search-icon{position:absolute;left:24px;top:50%;transform:translateY(-50%);color:var(--color-text-secondary)}.messages-search{width:100%;padding:6px 10px 6px 30px;border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:var(--font-sm);outline:none;background:var(--color-section-bg)}.messages-search:focus{border-color:var(--color-primary)}.messages-thread-list{flex:1;overflow-y:auto}.messages-empty{padding:24px;text-align:center;color:var(--color-text-secondary);font-size:var(--font-sm)}.thread-row{padding:12px 14px;border-bottom:1px solid var(--color-border);cursor:pointer;position:relative;transition:background .1s}.thread-row:hover{background:var(--color-section-bg)}.thread-row--active{background:var(--color-primary-light);border-left:3px solid var(--color-primary)}.thread-row--unread .thread-sender,.thread-row--unread .thread-subject{font-weight:700}.unread-dot{position:absolute;top:16px;right:14px;width:8px;height:8px;background:var(--color-primary);border-radius:50%}.thread-sender{font-size:var(--font-sm);color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:2px;padding-right:20px}.thread-subject{font-size:var(--font-sm);color:var(--color-text-primary);margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding-right:20px}.thread-preview{font-size:var(--font-xs);color:var(--color-text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.thread-date{font-size:var(--font-xs);color:var(--color-text-secondary);position:absolute;top:12px;right:28px}.thread-more-btn{position:absolute;bottom:8px;right:8px;background:none;border:none;color:var(--color-text-secondary);padding:4px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center}.thread-more-btn:hover{background:var(--color-border)}.messages-new-btn-wrap{padding:12px;border-top:1px solid var(--color-border)}.messages-thread-panel{flex:1;display:flex;flex-direction:column;overflow:hidden}.messages-no-selection{display:flex;align-items:center;justify-content:center;height:100%;color:var(--color-text-secondary);font-size:var(--font-sm)}.thread-view{display:flex;flex-direction:column;height:100%}.thread-view-header{padding:16px 20px;border-bottom:1px solid var(--color-border);flex-shrink:0}.thread-view-subject{font-size:var(--font-lg);font-weight:700;margin-bottom:6px}.thread-view-participants{font-size:var(--font-sm);color:var(--color-text-secondary)}.thread-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px}.message-bubble-wrap{max-width:80%}.message-bubble-wrap--patient{align-self:flex-end}.message-meta{font-size:var(--font-xs);margin-bottom:4px;color:var(--color-text-primary)}.message-bubble{padding:12px 16px;border-radius:var(--radius-md);font-size:var(--font-sm);line-height:1.6;white-space:pre-wrap}.message-bubble--provider{background:#f0f4f8;border:1px solid #d8e4f0}.message-bubble--patient{background:#fff;border-left:3px solid var(--color-primary);border-top:1px solid var(--color-border);border-right:1px solid var(--color-border);border-bottom:1px solid var(--color-border)}.thread-reply{padding:16px 20px;border-top:1px solid var(--color-border);flex-shrink:0}