*{box-sizing:border-box}:root{--bg-dark: #1d2021;--bg-main: #282828;--bg-soft: #32302f;--bg-elevated: #3c3836;--bg-hover: #504945;--fg-main: #ebdbb2;--fg-soft: #d5c4a1;--fg-muted: #a89984;--accent-primary: #83a598;--accent-secondary: #8ec07c;--accent-warm: #fabd2f;--accent-orange: #fe8019;--accent-red: #fb4934;--accent-purple: #d3869b;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .4);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-full: 9999px;--transition: all .2s ease}body{background-color:var(--bg-dark);color:var(--fg-main);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;margin:0;line-height:1.6}.app{display:flex;flex-direction:column;height:100vh}.app-header{background:linear-gradient(135deg,var(--bg-elevated) 0%,var(--bg-soft) 100%);padding:1rem 2rem;border-bottom:1px solid var(--bg-hover);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:flex;align-items:center}.logo{color:var(--accent-primary);font-size:1.5rem;font-weight:700;text-decoration:none;letter-spacing:-.5px;transition:var(--transition)}.logo:hover{color:var(--accent-secondary)}.back-btn{color:var(--fg-muted);text-decoration:none;font-size:.875rem;padding:.5rem 1rem;border-radius:var(--radius-full);background:var(--bg-hover);transition:var(--transition);margin-right:1rem}.back-btn:hover{background:var(--accent-primary);color:var(--bg-dark)}.homepage{flex:1;overflow-y:auto;padding:2rem}.hero{text-align:center;padding:4rem 2rem;background:linear-gradient(135deg,var(--bg-soft) 0%,var(--bg-main) 100%);border-radius:var(--radius-lg);margin-bottom:3rem;box-shadow:var(--shadow-lg)}.hero-title{font-size:3rem;font-weight:800;margin:0 0 1rem;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.25rem;color:var(--fg-muted);margin:0}.rooms-section{max-width:1200px;margin:0 auto}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.section-title{font-size:1.5rem;font-weight:600;margin:0;color:var(--fg-soft)}.create-room-btn{background:linear-gradient(135deg,var(--accent-warm),var(--accent-orange));color:var(--bg-dark);border:none;padding:.75rem 1.5rem;border-radius:var(--radius-full);font-weight:600;font-size:.9375rem;cursor:pointer;transition:var(--transition)}.create-room-btn:hover{transform:scale(1.05);box-shadow:var(--shadow-md)}.room-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1.5rem}.room-card{background:var(--bg-soft);border-radius:var(--radius-md);padding:1.5rem;cursor:pointer;transition:var(--transition);border:1px solid transparent;box-shadow:var(--shadow-sm);display:flex;flex-direction:column}.room-card:hover{transform:translateY(-4px);border-color:var(--accent-primary);box-shadow:var(--shadow-lg)}.room-card-icon{font-size:2.5rem;margin-bottom:1rem}.room-card-title{font-size:1.25rem;font-weight:600;margin:0 0 .5rem;text-transform:capitalize;color:var(--fg-main)}.room-card-description{font-size:.875rem;color:var(--fg-muted);margin:0;flex:1}.room-card-btn{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:var(--bg-dark);border:none;padding:.625rem 1.25rem;border-radius:var(--radius-full);font-weight:600;font-size:.875rem;cursor:pointer;transition:var(--transition);width:100%;margin-top:1rem}.room-card-btn:hover{transform:scale(1.02);box-shadow:var(--shadow-md)}.app-main{display:flex;flex:1;overflow:hidden}.room-list{background:var(--bg-soft);width:260px;padding:1.5rem;border-right:1px solid var(--bg-hover);overflow-y:auto}.room-list h2{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--fg-muted);margin:0 0 1rem}.room-list ul{list-style:none;padding:0;margin:0}.room-list li{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);margin-bottom:.25rem;color:var(--fg-soft)}.room-list li:hover{background:var(--bg-hover)}.room-list li.active{background:var(--accent-primary);color:var(--bg-dark);font-weight:500}.room-icon{font-size:1.25rem}.chat-room{display:flex;flex-direction:column;flex:1;background:var(--bg-main)}.chat-header{padding:1rem 1.5rem;background:var(--bg-soft);border-bottom:1px solid var(--bg-hover)}.chat-header h2{margin:0;font-size:1.125rem;font-weight:600;text-transform:capitalize}.message-list{flex:1;padding:1.5rem;overflow-y:auto;display:flex;flex-direction:column;gap:1rem}.message{display:flex;flex-direction:column;max-width:70%;animation:messageIn .3s ease}@keyframes messageIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.own{align-self:flex-end}.message-bubble{background:var(--bg-elevated);padding:.875rem 1.125rem;border-radius:var(--radius-md);border-bottom-left-radius:4px;box-shadow:var(--shadow-sm)}.message.own .message-bubble{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:var(--bg-dark);border-bottom-left-radius:var(--radius-md);border-bottom-right-radius:4px}.message-sender{font-size:.75rem;font-weight:600;color:var(--accent-primary);margin-bottom:.25rem}.message.own .message-sender{color:var(--bg-dark);opacity:.8;text-align:right}.message-text{margin:0;font-size:.9375rem;line-height:1.5}.message-time{font-size:.6875rem;color:var(--fg-muted);margin-top:.375rem}.message.own .message-time{text-align:right}.message-input{padding:1rem 1.5rem;background:var(--bg-soft);border-top:1px solid var(--bg-hover);display:flex;gap:.75rem;align-items:center}.message-input input{flex:1;background:var(--bg-main);border:1px solid var(--bg-hover);border-radius:var(--radius-full);padding:.875rem 1.25rem;color:var(--fg-main);font-size:.9375rem;transition:var(--transition)}.message-input input::placeholder{color:var(--fg-muted)}.message-input input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #83a59833}.message-input button{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:var(--bg-dark);border:none;width:44px;height:44px;border-radius:var(--radius-full);cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;font-size:1.25rem;font-weight:700}.message-input button:hover{transform:scale(1.05);box-shadow:var(--shadow-md)}.message-input button:active{transform:scale(.98)}.member-list{background:var(--bg-soft);width:240px;padding:1.5rem;border-left:1px solid var(--bg-hover);overflow-y:auto}.member-list h2{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--fg-muted);margin:0 0 1rem}.member-list 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var(--accent-secondary)}.no-members{color:var(--fg-muted);font-style:italic;font-size:.875rem}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-main)}::-webkit-scrollbar-thumb{background:var(--bg-hover);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--fg-muted)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.7);display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal{background:var(--bg-soft);border-radius:var(--radius-lg);padding:2rem;width:100%;max-width:400px;box-shadow:var(--shadow-lg);border:1px solid var(--bg-hover);animation:modalIn .2s ease}@keyframes modalIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.modal-title{margin:0 0 .5rem;font-size:1.5rem;font-weight:700;color:var(--fg-main)}.modal-description{margin:0 0 1.5rem;color:var(--fg-muted);font-size:.9375rem}.modal-input{width:100%;background:var(--bg-main);border:1px solid var(--bg-hover);border-radius:var(--radius-sm);padding:.875rem 1rem;color:var(--fg-main);font-size:1rem;transition:var(--transition);margin-bottom:1.5rem}.modal-error{color:var(--accent-red);font-size:.875rem;margin:-1rem 0 1rem}.modal-input::placeholder{color:var(--fg-muted)}.modal-input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #83a59833}.modal-actions{display:flex;gap:.75rem;justify-content:flex-end}.modal-btn{padding:.75rem 1.5rem;border-radius:var(--radius-sm);font-weight:600;font-size:.9375rem;cursor:pointer;transition:var(--transition);border:none}.modal-btn-cancel{background:var(--bg-hover);color:var(--fg-soft)}.modal-btn-cancel:hover{background:var(--bg-elevated)}.modal-btn-submit{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:var(--bg-dark)}.modal-btn-submit:hover:not(:disabled){transform:scale(1.02);box-shadow:var(--shadow-md)}.modal-btn-submit:disabled{opacity:.5;cursor:not-allowed}.header-right{margin-left:auto;display:flex;align-items:center;gap:1rem}.header-username{color:var(--fg-soft);font-size:.875rem;font-weight:500}.logout-btn{background:var(--bg-hover);color:var(--fg-soft);border:none;padding:.5rem 1rem;border-radius:var(--radius-full);font-size:.875rem;font-weight:500;cursor:pointer;transition:var(--transition)}.logout-btn:hover{background:var(--accent-red);color:var(--bg-dark)}.auth-page{flex:1;display:flex;align-items:center;justify-content:center;padding:2rem;background:linear-gradient(135deg,var(--bg-dark) 0%,var(--bg-main) 100%);min-height:100vh}.auth-card{background:var(--bg-soft);border-radius:var(--radius-lg);padding:2.5rem;width:100%;max-width:420px;box-shadow:var(--shadow-lg);border:1px solid var(--bg-hover);animation:modalIn .3s ease}.auth-header{text-align:center;margin-bottom:2rem}.auth-title{font-size:2rem;font-weight:800;margin:0 0 .5rem;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.auth-subtitle{color:var(--fg-muted);margin:0;font-size:.9375rem}.auth-tabs{display:flex;gap:.5rem;margin-bottom:1.5rem;background:var(--bg-main);padding:.25rem;border-radius:var(--radius-sm)}.auth-tab{flex:1;padding:.75rem 1rem;border:none;background:transparent;color:var(--fg-muted);font-size:.9375rem;font-weight:500;cursor:pointer;border-radius:var(--radius-sm);transition:var(--transition)}.auth-tab:hover{color:var(--fg-soft)}.auth-tab.active{background:var(--bg-elevated);color:var(--fg-main)}.auth-form{display:flex;flex-direction:column;gap:1.25rem}.auth-field{display:flex;flex-direction:column;gap:.5rem}.auth-label{font-size:.875rem;font-weight:500;color:var(--fg-soft)}.auth-input{width:100%;background:var(--bg-main);border:1px solid var(--bg-hover);border-radius:var(--radius-sm);padding:.875rem 1rem;color:var(--fg-main);font-size:1rem;transition:var(--transition)}.auth-input::placeholder{color:var(--fg-muted)}.auth-input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #83a59833}.auth-input:disabled{opacity:.6;cursor:not-allowed}.auth-error{background:rgba(251,73,52,.1);border:1px solid var(--accent-red);color:var(--accent-red);padding:.75rem 1rem;border-radius:var(--radius-sm);font-size:.875rem}.auth-btn{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:var(--bg-dark);border:none;padding:1rem 1.5rem;border-radius:var(--radius-sm);font-weight:600;font-size:1rem;cursor:pointer;transition:var(--transition);margin-top:.5rem}.auth-btn:hover:not(:disabled){transform:scale(1.02);box-shadow:var(--shadow-md)}.auth-btn:disabled{opacity:.5;cursor:not-allowed}.auth-footer{margin-top:1.5rem;text-align:center}.auth-toggle-text{color:var(--fg-muted);font-size:.875rem;margin:0}.auth-toggle-btn{background:none;border:none;color:var(--accent-primary);font-size:.875rem;font-weight:600;cursor:pointer;margin-left:.25rem;transition:var(--transition)}.auth-toggle-btn:hover{color:var(--accent-secondary);text-decoration:underline}.auth-hint{margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid var(--bg-hover);text-align:center}.auth-hint p{color:var(--fg-muted);font-size:.75rem;margin:0;font-family:monospace}