:root{--primary: #2563eb;--primary-gradient: linear-gradient(135deg, #2563eb 0%, #db2777 100%);--secondary: #f0fdf4;--text-main: #1f2937;--text-muted: #6b7280;--outgoing-bg: #eff6ff;--incoming-bg: #ffffff;--danger: #ef4444;--white: rgba(255, 255, 255, .9);--shadow: 0 10px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .1);--chat-bg: #f8fafc}*{box-sizing:border-box;margin:0;padding:0;font-family:Inter,system-ui,-apple-system,sans-serif}body{background-color:#e2e8f0;background-image:radial-gradient(at 0% 0%,hsla(253,16%,7%,1) 0,transparent 50%),radial-gradient(at 50% 0%,hsla(225,39%,30%,1) 0,transparent 50%),radial-gradient(at 100% 0%,hsla(339,49%,30%,1) 0,transparent 50%);color:var(--text-main);height:100vh;display:flex;justify-content:center;overflow:hidden}#root{width:100%;height:100%;max-width:1600px;background:var(--white);display:flex;flex-direction:column;position:relative;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a}@media(min-width:1024px){#root{margin:20px auto;height:calc(100vh - 40px);border-radius:12px;overflow:hidden}body:after{content:"";position:absolute;top:0;width:100%;height:100%;background:var(--primary-gradient);z-index:-1}}.mobile-container{display:flex;flex-direction:column;height:100%;max-width:600px;margin:0 auto;background-color:#fff}.header{background:#ffffffd9;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);color:var(--text-main);padding:1rem;display:flex;justify-content:space-between;align-items:center;z-index:10;box-shadow:0 4px 15px #0000000d;border-bottom:1px solid rgba(255,255,255,.3)}.chat-area{flex:1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:.75rem;background-color:#f1f5f9;background-image:radial-gradient(#cbd5e1 1px,transparent 1px);background-size:20px 20px}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#0003;border-radius:3px}.flex-column{display:flex;flex-direction:column}.flex-row{display:flex;align-items:center}.justify-between{justify-content:space-between}.flex-1{flex:1}.p-2{padding:.5rem}.p-4{padding:1rem}.gap-2{gap:.5rem}.hidden{display:none}.relative{position:relative}.auth-container{display:flex;justify-content:center;align-items:center;height:100%;background:transparent}.auth-card{background:#ffffffbf;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);padding:2.5rem 2rem;border-radius:20px;box-shadow:0 8px 32px #1f268726;border:1px solid rgba(255,255,255,.5);width:100%;max-width:400px;text-align:center}.message{max-width:80%;padding:.75rem 1rem;border-radius:1.25rem;font-size:.9375rem;position:relative}.message-me{align-self:flex-end;background:var(--outgoing-bg);color:var(--text-main);border-bottom-right-radius:.25rem}.message-them{align-self:flex-start;background:var(--bubble-them);color:var(--text);border-bottom-left-radius:.25rem}.sender-name{font-size:.75rem;font-weight:600;margin-bottom:.25rem;color:var(--text-muted)}.input-area{padding:1rem;background:#ffffffd9;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:none;display:flex;gap:.5rem;box-shadow:0 -4px 15px #00000005}input{flex:1;padding:.875rem 1.25rem;border:1px solid rgba(255,255,255,.7);background:#ffffffe6;border-radius:2rem;outline:none;box-shadow:0 2px 4px #00000005;transition:all .3s ease}input:focus{border-color:#2563eb80;box-shadow:0 4px 12px #2563eb1a}button.icon-btn{background:var(--primary);color:#fff;border:none;width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer}.settings-view{padding:2rem;display:flex;flex-direction:column;gap:1.5rem}.setting-card{background:#fff;padding:1.5rem;border-radius:1rem;box-shadow:0 1px 3px #0000001a}.label{display:block;font-size:.875rem;font-weight:600;margin-bottom:.5rem;color:#4b5563}.info-text{font-size:.8125rem;color:#6b7280;margin-top:.5rem}.overlay{position:absolute;inset:0;background:#000000b3;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;display:flex;align-items:center;justify-content:center;padding:1.5rem}.call-card,.modal{background:#fff;padding:2rem;border-radius:1.5rem;text-align:center;width:100%;max-width:320px;box-shadow:0 10px 25px #0003}.modal{text-align:left;max-width:400px}.pulse-icon{width:80px;height:80px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1.5rem;animation:pulse 1.5s infinite}.pulse-icon.incoming{background:#10b981}.active-call-icon{width:80px;height:80px;background:#10b981;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1.5rem}@keyframes pulse{0%{transform:scale(1);box-shadow:0 0 #2563ebb3}70%{transform:scale(1.1);box-shadow:0 0 0 15px #2563eb00}to{transform:scale(1);box-shadow:0 0 #2563eb00}}.icon-btn.end-call{background:#ef4444}.icon-btn.accept{background:#10b981}.icon-btn.small{width:32px;height:32px}.user-list{display:flex;flex-direction:column;gap:1rem;max-height:300px;overflow-y:auto}.user-item{display:flex;justify-content:space-between;align-items:center;padding:.75rem;background:#f9fafb;border-radius:.75rem}