@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--color-brand: #3b82f6;--color-brand-hover: #2563eb;--color-brand-light: #60a5fa;--color-success: #10b981;--color-danger: #ef4444;--color-warning: #f59e0b;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--sidebar-width: 340px;--header-height: 64px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--ease-spring: cubic-bezier(.175, .885, .32, 1.275)}:root{--bg-app: #020617;--bg-sidebar: #0f172a;--bg-card: #1e293b;--bg-hover: #334155;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--border-color: #1e293b;--border-highlight: #334155;--input-bg: #0f172a;--glass-bg: rgba(15, 23, 42, .75)}[data-theme=light]{--bg-app: #f8fafc;--bg-sidebar: #ffffff;--bg-card: #ffffff;--bg-hover: #f1f5f9;--text-primary: #0f172a;--text-secondary: #64748b;--text-muted: #94a3b8;--border-color: #e2e8f0;--border-highlight: #cbd5e1;--input-bg: #ffffff;--glass-bg: rgba(255, 255, 255, .85)}body{margin:0;font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-app);color:var(--text-primary);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;transition:background-color .3s ease,color .3s ease}.app-container{display:flex;height:100vh;overflow:hidden}.sidebar{width:var(--sidebar-width);background-color:var(--bg-sidebar);border-right:1px solid var(--border-color);display:flex;flex-direction:column;transition:background-color .3s ease,border-color .3s ease}.main-content{flex:1;display:flex;flex-direction:column;background-color:var(--bg-app);position:relative}.sidebar-header{height:auto;min-height:var(--header-height);padding:20px;border-bottom:1px solid var(--border-color);background-color:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);position:sticky;top:0;z-index:10;display:flex;flex-direction:column;justify-content:center;gap:12px}.search-input{width:-webkit-fill-available;padding:10px 14px;border-radius:var(--radius-md);border:1px solid var(--border-color);background-color:var(--input-bg);color:var(--text-primary);font-size:.95rem;transition:all .2s ease;outline:none}.search-input:focus{border-color:var(--color-brand);box-shadow:0 0 0 3px #3b82f626}.contact-list{overflow-y:auto;flex:1;padding:12px}.contact-item{padding:12px 14px;margin-bottom:4px;border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease;display:flex;justify-content:space-between;align-items:center;border:1px solid transparent}.contact-item:hover{background-color:var(--bg-hover)}.contact-item.active{background-color:var(--bg-hover);border-color:var(--border-highlight)}.contact-info{flex:1;min-width:0}.contact-name{font-weight:600;margin-bottom:4px;color:var(--text-primary)}.contact-preview{font-size:.85rem;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.badge{background:var(--color-brand);color:#fff;font-size:.7rem;font-weight:700;padding:4px 8px;border-radius:9999px;margin-left:10px;min-width:18px;text-align:center;box-shadow:0 2px 4px #3b82f64d}.chat-header{height:var(--header-height);padding:0 24px;background-color:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;z-index:10}.message-list{flex:1;overflow-y:auto;padding:24px 32px;display:flex;flex-direction:column;gap:16px}.message-bubble{max-width:65%;padding:12px 18px;border-radius:var(--radius-lg);position:relative;line-height:1.5;box-shadow:var(--shadow-sm)}.message-bubble.sent{align-self:flex-end;background:linear-gradient(135deg,var(--color-brand) 0%,var(--color-brand-hover) 100%);color:#fff;border-bottom-right-radius:4px}.message-bubble.received{align-self:flex-start;background-color:var(--bg-card);color:var(--text-primary);border-bottom-left-radius:4px;border:1px solid var(--border-color)}.message-input-area{padding:24px;background-color:var(--bg-app);border-top:1px solid var(--border-color);display:flex;gap:16px;align-items:flex-end}.message-input{flex:1;padding:14px;border-radius:var(--radius-lg);border:1px solid var(--border-color);background-color:var(--input-bg);color:var(--text-primary);resize:none;font-family:inherit;font-size:.95rem;outline:none;box-shadow:var(--shadow-sm);transition:border-color .2s;min-height:52px}.message-input:focus{border-color:var(--color-brand)}.btn{padding:10px 20px;border-radius:var(--radius-md);border:none;font-weight:600;font-size:.9rem;cursor:pointer;transition:all .2s var(--ease-spring);display:flex;align-items:center;gap:8px}.btn:active{transform:scale(.96)}.btn-primary{background-color:var(--color-brand);color:#fff;box-shadow:0 4px 6px -1px #3b82f64d}.btn-primary:hover{background-color:var(--color-brand-hover);box-shadow:0 6px 8px -1px #3b82f666}.btn-secondary{background-color:var(--bg-hover);color:var(--text-primary);border:1px solid var(--border-color)}.btn-secondary:hover{background-color:var(--border-highlight)}.btn-success{background-color:var(--color-success);color:#fff;box-shadow:0 4px 6px -1px #10b9814d}.btn-danger{background-color:var(--color-danger);color:#fff;box-shadow:0 4px 6px -1px #ef44444d}.btn:hover{opacity:.95}.modal-overlay{position:fixed;inset:0;background-color:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;justify-content:center;align-items:center;z-index:100;animation:fadeIn .2s ease-out}.modal-content{background-color:var(--bg-card);padding:32px;border-radius:var(--radius-xl);min-width:320px;text-align:center;border:1px solid var(--border-color);box-shadow:var(--shadow-lg);animation:slideUp .3s var(--ease-spring)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:3px;opacity:.5}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}@media(max-width:768px){.app-container{position:relative;width:100vw}.sidebar{width:100%;position:absolute;inset:0;z-index:20;transform:translate(0);transition:transform .3s var(--ease-spring)}.sidebar.hidden{transform:translate(-100%)}.main-content{width:100%;position:absolute;inset:0;z-index:10}.mobile-back-btn{display:flex!important}}.mobile-back-btn{display:none;background:none;border:none;color:var(--text-primary);cursor:pointer;padding:8px;margin-right:8px;border-radius:50%;transition:background-color .2s}.mobile-back-btn:hover{background-color:var(--bg-hover)}