:root{--bg-darkest: #16171a;--bg-dark: #1e1f23;--bg-panel: #26272c;--bg-hover: #303136;--text-primary: #e8e9ec;--text-muted: #9a9ca3;--accent: #2dd4bf;--accent-hover: #26bfac;--danger: #f26d6d;--online: #3ecf6a;--offline: #6b6d73;--radius: 10px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg-dark);color:var(--text-primary)}button{cursor:pointer;font-family:inherit}.home-screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px;background:radial-gradient(circle at top,#202329 0%,var(--bg-dark) 60%)}.home-logo{font-size:40px;font-weight:800;color:var(--accent);margin-bottom:8px}.home-subtitle{color:var(--text-muted);margin-bottom:32px;max-width:420px}.home-actions{display:flex;gap:16px}.btn{border:none;border-radius:var(--radius);padding:12px 24px;font-size:15px;font-weight:600;transition:background .15s ease}.btn-primary{background:var(--accent);color:#0b0c0d}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg-panel);color:var(--text-primary)}.btn-secondary:hover{background:var(--bg-hover)}.btn:disabled{opacity:.6;cursor:not-allowed}.auth-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{background:var(--bg-panel);padding:32px;border-radius:16px;width:100%;max-width:380px}.auth-card h1{font-size:22px;margin-bottom:4px}.auth-card p.hint{color:var(--text-muted);font-size:14px;margin-bottom:24px}.field{margin-bottom:16px;text-align:left}.field label{display:block;font-size:12px;text-transform:uppercase;font-weight:700;color:var(--text-muted);margin-bottom:6px}.field input{width:100%;padding:10px 12px;border-radius:6px;border:1px solid #3a3b41;background:var(--bg-dark);color:var(--text-primary);font-size:14px}.field input:focus{outline:2px solid var(--accent);outline-offset:1px}.auth-error{background:#f26d6d1f;color:var(--danger);padding:10px 12px;border-radius:6px;font-size:13px;margin-bottom:16px}.auth-info{background:#2dd4bf1f;color:var(--accent);padding:10px 12px;border-radius:6px;font-size:13px;margin-bottom:16px}.auth-switch{margin-top:18px;font-size:13px;color:var(--text-muted);text-align:center}.auth-switch button{background:none;border:none;color:var(--accent);font-weight:600}.chat-layout{display:flex;height:100vh;overflow:hidden}.sidebar{width:260px;flex-shrink:0;background:var(--bg-darkest);display:flex;flex-direction:column}.sidebar-header{padding:18px 16px;font-weight:700;color:var(--accent);border-bottom:1px solid #232427}.sidebar-section-title{padding:16px 16px 6px;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}.online-user{display:flex;align-items:center;gap:10px;padding:6px 16px;font-size:14px}.status-dot{width:9px;height:9px;border-radius:50%;background:var(--online);flex-shrink:0}.sidebar-footer{margin-top:auto;padding:12px 16px;border-top:1px solid #232427;display:flex;align-items:center;justify-content:space-between;gap:8px}.sidebar-footer .username{font-size:13px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0}.chat-header{padding:16px 20px;border-bottom:1px solid #232427;font-weight:700}.chat-messages{flex:1;overflow-y:auto;padding:16px 20px;display:flex;flex-direction:column;gap:10px}.chat-message{max-width:640px}.chat-message .msg-meta{display:flex;gap:8px;align-items:baseline;margin-bottom:2px}.chat-message .msg-author{font-weight:700;font-size:14px;color:var(--accent)}.chat-message .msg-time{font-size:11px;color:var(--text-muted)}.chat-message .msg-text{font-size:14px;line-height:1.4;white-space:pre-wrap;word-break:break-word}.chat-message.own .msg-author{color:#e8e9ec}.system-message{color:var(--text-muted);font-size:12px;text-align:center;padding:4px 0}.chat-input-bar{display:flex;gap:10px;padding:16px 20px 20px}.chat-input-bar input{flex:1;padding:12px 14px;border-radius:8px;border:none;background:var(--bg-panel);color:var(--text-primary);font-size:14px}.chat-input-bar input:focus{outline:2px solid var(--accent)}.char-counter{align-self:center;font-size:12px;color:var(--danger);min-width:28px;text-align:right}.connection-banner{text-align:center;font-size:12px;padding:6px;background:#f26d6d26;color:var(--danger)}.avatar-img{border-radius:50%;object-fit:cover;flex-shrink:0}.avatar-fallback{border-radius:50%;background:var(--bg-panel);color:var(--accent);font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.btn-small{padding:6px 12px;font-size:13px}.sidebar-footer-profile{display:flex;align-items:center;gap:10px;border:none;background:none;padding:0;min-width:0;flex:1;text-align:left;border-radius:var(--radius)}.sidebar-footer-profile:hover{background:var(--bg-hover)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}.modal-card{background:var(--bg-dark);border-radius:var(--radius);width:100%;max-width:380px;max-height:80vh;overflow-y:auto;padding:20px}.modal-header{display:flex;align-items:center;justify-content:space-between;font-weight:700;margin-bottom:16px}.modal-close{border:none;background:none;color:var(--text-muted);font-size:20px;line-height:1;padding:0}.modal-close:hover{color:var(--text-primary)}.friend-search{width:100%;padding:10px 12px;border-radius:8px;border:none;background:var(--bg-panel);color:var(--text-primary);font-size:14px;margin-bottom:8px}.friend-search:focus{outline:2px solid var(--accent)}.friends-section{margin-top:16px}.friends-section-title{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:6px}.friend-row{display:flex;align-items:center;gap:10px;padding:6px 0;font-size:14px}.friend-row span:nth-child(2){flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.friend-pending{font-size:12px;color:var(--text-muted)}.profile-avatar-edit{display:flex;flex-direction:column;align-items:center;gap:10px}.profile-username{text-align:center;font-weight:700;margin-top:8px}.profile-status-form{display:flex;gap:8px;margin-top:16px}.profile-status-form input{flex:1;padding:10px 12px;border-radius:8px;border:none;background:var(--bg-panel);color:var(--text-primary);font-size:14px}.profile-status-form input:focus{outline:2px solid var(--accent)}