:root{--bg-main:#f0f4f8;--bg-card:#ffffff;--text-main:#2d3748;--text-muted:#718096;--border-color:#e2e8f0;--msg-sent-bg:#3182ce;--msg-received-bg:#4a5568;--primary-pastel:#b2ccfc;--primary-hover:#93b5f7;--primary-active:#cbdfff;--input-bg:#f7fafc;--success-bg:#f0fff4;--success-text:#2f855a;--error-bg:#fff5f5;--error-text:#e53e3e;--bg-sidebar:#ffffff}body{font-family:'Segoe UI',Roboto,system-ui,sans-serif;background-color:var(--bg-main);color:var(--text-main);margin:0;padding:0;height:100vh;overflow:hidden}.auth-wrapper{display:flex;justify-content:center;align-items:center;min-height:100vh;width:100%}.auth-container{background:var(--bg-sidebar) !important;color:var(--text-main) !important;padding:2.5rem;border-radius:16px;box-shadow:0 10px 25px rgba(0,0,0,0.05);border:1px solid var(--border-color);width:100%;max-width:360px;text-align:center;animation:fadeInUp .4s ease}.auth-container h2{margin-top:0;margin-bottom:1.5rem;font-weight:600}.form-group{margin-bottom:1.2rem;text-align:left}.form-group input{width:100%;padding:12px;border:1px solid var(--border-color);border-radius:8px;background:var(--bg-main) !important;box-sizing:border-box;font-size:14px;color:var(--text-main);transition:all .2s ease}.form-group input::placeholder{color:var(--text-muted)}.form-group input:focus{outline:none;border-color:var(--primary-hover);box-shadow:0 0 0 3px rgba(178,204,252,0.4)}.password-wrapper{position:relative}.password-wrapper input{padding-right:45px !important}.password-wrapper .toggle-password{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;padding:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center;cursor:pointer}.password-wrapper .toggle-password img{width:20px;height:20px;opacity:.5;transition:opacity .2s ease}.password-wrapper .toggle-password:hover img{opacity:.9}button.btn-block{width:100%;padding:12px;background-color:var(--primary-pastel);border:none;border-radius:8px;color:#2d3748;font-weight:600;cursor:pointer;font-size:14px;transition:background .2s}button.btn-block:hover{background-color:var(--primary-hover)}.switch-form{margin-top:1.5rem;font-size:13px;color:var(--text-muted)}.switch-form a{color:#6574cd;text-decoration:none;font-weight:600}.switch-form a:hover{text-decoration:underline}.error-msg,.success-msg{padding:12px;border-radius:8px;font-size:13px;margin-top:.8rem;text-align:left;display:none;animation:fadeInUp .3s ease forwards}.error-msg{background-color:var(--error-bg);color:var(--error-text);border:1px solid #fed7d7}.success-msg{background-color:var(--success-bg);color:var(--success-text);border:1px solid #c6f6d5}.chat-layout{display:flex;height:100vh;width:100vw;background:var(--bg-main)}.chat-layout .sidebar{width:320px;background:var(--bg-sidebar);border-right:1px solid var(--border-color);display:flex;flex-direction:column;padding:1.5rem;box-sizing:border-box;color:var(--text-main)}.chat-layout .sidebar h3{margin-top:0;margin-bottom:1rem;font-size:20px}.chat-layout .sidebar h4{margin:1.5rem 0 .6rem 0;color:var(--text-main);font-size:11px;text-transform:uppercase;letter-spacing:.8px}.chat-layout .chat-area{flex:1;display:flex;flex-direction:column;background:var(--bg-main)}.search-box{display:flex;gap:8px;margin-bottom:.5rem}.search-box input{flex:1;padding:10px 12px;border:1px solid var(--border-color);border-radius:8px;font-size:13px;background:var(--input-bg)}.search-box input:focus{outline:none;border-color:var(--primary-hover)}.search-box button{padding:0 14px;background:var(--primary-pastel);border:none;border-radius:8px;cursor:pointer;font-size:13px;font-weight:600}.search-box button:hover{background:var(--primary-hover)}.list-container{flex:1;overflow-y:auto;margin-bottom:1rem}.friend-row{margin-bottom:.4rem}.friend-row .user-item{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-radius:8px;cursor:pointer;border:1px solid transparent;transition:all .2s ease-in-out}.friend-row .user-item:hover{background-color:var(--primary-pastel);transform:translateX(4px)}.friend-row .user-item.active{background-color:var(--primary-active);border-color:var(--primary-hover);font-weight:600}.friend-row .user-item button{display:flex;align-items:center;justify-content:center;padding:6px;border-radius:6px;background:transparent;border:none;cursor:pointer;transition:all .2s ease}.friend-row .user-item button img{width:12px;height:12px;opacity:.4;transition:opacity .2s ease}.friend-row .user-item button:hover{background:#fed7d7}.friend-row .user-item button:hover img{opacity:1;filter:invert(20%) sepia(50%) saturate(600%) hue-rotate(340deg)}.request-item .btn-group{display:flex;gap:6px}.request-item .btn-group button{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:none;cursor:pointer;transition:all .2s ease}.request-item .btn-group button img{width:12px;height:12px;transition:transform .2s ease}.request-item .btn-group button:hover img{transform:scale(1.15)}.request-item .btn-group .btn-accept{background:#c6f6d5}.request-item .btn-group .btn-accept img{filter:invert(25%) sepia(50%) saturate(400%) hue-rotate(110deg)}.request-item .btn-group .btn-accept:hover{background:#9ae6b4}.request-item .btn-group .btn-decline{background:#fed7d7}.request-item .btn-group .btn-decline img{filter:invert(20%) sepia(50%) saturate(600%) hue-rotate(340deg)}.request-item .btn-group .btn-decline:hover{background:#feb2b2}.messages-box{flex:1;padding:2rem;overflow-y:auto;display:flex;flex-direction:column;gap:12px}.messages-box .placeholder-text{text-align:center;color:var(--text-muted);margin-top:30vh;font-size:14px}.input-area{padding:1.5rem;background:var(--bg-sidebar);border-top:1px solid var(--border-color);display:flex;gap:12px}.input-area input{flex:1;padding:14px;border:1px solid var(--border-color);border-radius:8px;background:var(--bg-main);color:var(--text-main);font-size:14px}.input-area input:focus{outline:none;border-color:var(--primary-hover)}.input-area button{padding:0 24px;background:var(--primary-pastel);border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:background .2s}.input-area button:hover{background:var(--primary-hover)}.input-area button:disabled{background:var(--border-color);color:var(--text-muted);cursor:not-allowed}.message{animation:popIn .15s cubic-bezier(.16, 1, .3, 1) forwards;position:relative}.message-wrapper{display:flex;align-items:center;gap:8px;group:hover}.delete-btn{opacity:0;cursor:pointer;color:#e53e3e;background:none;border:none;font-size:11px;transition:opacity .2s}.message-row:hover .delete-btn{opacity:1}#imageLightbox{backdrop-filter:blur(4px)}.chat-thumbnail:hover{transform:scale(1.02);filter:brightness(.95)}.delete-btn{background:none;border:none;padding:6px;border-radius:50%;display:flex;align-items:center;justify-content:center}.delete-btn:hover{background:rgba(229,62,62,0.1)}.icon-svg{width:16px;height:16px;vertical-align:middle;display:inline-block;filter:var(--icon-filter, none)}.auth-logo{width:250px;height:auto;display:block;margin:0 auto 1.5rem auto}.toggle-password{display:flex;align-items:center;justify-content:center;padding:0;width:24px;height:24px}#themeMenu{background:var(--bg-sidebar) !important;color:var(--text-main) !important;border:1px solid var(--border-color)}@keyframes fadeInUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes popIn{from{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes zoomIn{from{transform:scale(.93)}to{transform:scale(1)}}