:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-card: rgba(30, 41, 59, .7);--bg-card-hover: rgba(51, 65, 85, .8);--border-color: rgba(255, 255, 255, .1);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--accent-primary: #6366f1;--accent-hover: #4f46e5;--accent-light: rgba(99, 102, 241, .15);--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .2), 0 4px 6px -2px rgba(0, 0, 0, .1);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-full: 9999px;--font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-heading: "Outfit", sans-serif}[data-theme=light]{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-card: #ffffff;--bg-card-hover: #f1f5f9;--border-color: #e2e8f0;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--accent-primary: #4f46e5;--accent-hover: #4338ca;--accent-light: rgba(79, 70, 229, .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;overflow-x:hidden;line-height:1.5;-webkit-font-smoothing:antialiased}.app-container{display:flex;height:100vh;width:100vw;overflow:hidden}.sidebar{width:260px;background-color:var(--bg-secondary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;flex-shrink:0}.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden;background-color:var(--bg-primary)}.top-bar{height:64px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:0 24px;background-color:var(--bg-secondary)}.page-body{flex:1;overflow-y:auto;padding:24px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:8px 16px;font-size:14px;font-weight:500;border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;transition:all .2s ease}.btn-primary{background-color:var(--accent-primary);color:#fff}.btn-primary:hover{background-color:var(--accent-hover)}.btn-secondary{background-color:transparent;border-color:var(--border-color);color:var(--text-primary)}.btn-secondary:hover{background-color:var(--bg-card-hover)}.btn-danger{background-color:var(--danger);color:#fff}.card{background:var(--bg-card);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-sm);transition:all .2s ease}.card:hover{box-shadow:var(--shadow-md)}.input{width:100%;padding:10px 14px;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:14px;outline:none;transition:border-color .2s}.input:focus{border-color:var(--accent-primary)}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:var(--radius-full);font-size:12px;font-weight:600}.badge-unread{background-color:var(--accent-light);color:var(--accent-primary)}.badge-offline{background-color:#f59e0b26;color:var(--warning)}.badge-online{background-color:#10b98126;color:var(--success)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal-content{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);width:100%;max-width:600px;max-height:90vh;overflow-y:auto;padding:24px;box-shadow:var(--shadow-lg)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:var(--radius-full)}