:root{--color-primary: #0891B2;--color-primary-hover: #0E7490;--color-secondary: #22D3EE;--color-cta: #22C55E;--color-cta-hover: #16A34A;--color-bg: #ECFEFF;--color-bg-card: #FFFFFF;--color-text: #164E63;--color-text-muted: #475569;--color-error: #EF4444;--color-border: #BAE6FD;--bubble-sent-bg: #0891B2;--bubble-sent-text: #FFFFFF;--bubble-recv-bg: #FFFFFF;--bubble-recv-text: #164E63;--radius-sm: 8px;--radius-md: 16px;--radius-lg: 24px;--shadow-card: 0 4px 24px rgba(8, 145, 178, .12);--shadow-msg: 0 1px 4px rgba(0, 0, 0, .08);--duration-fast: .15s;--duration-normal: .25s;--ease: cubic-bezier(.16, 1, .3, 1);--z-overlay: 50;--z-header: 20;--z-toast: 100}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{font-family:Work Sans,sans-serif;background:var(--color-bg);color:var(--color-text)}.hidden{display:none!important}button{cursor:pointer;border:none;background:none;font-family:inherit}input,textarea{font-family:inherit}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}#lobby-view{height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#ecfeff,#bae6fd);overflow-y:auto;padding:16px}.lobby-card{background:var(--color-bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);padding:40px;width:100%;max-width:440px}@media (max-width: 480px){#lobby-view{padding:0;align-items:flex-start}.lobby-card{border-radius:0;padding:24px;min-height:100%;box-shadow:none}}.logo-area{text-align:center;margin-bottom:32px}.logo-icon{display:flex;align-items:center;justify-content:center;width:56px;height:56px;background:linear-gradient(135deg,var(--color-primary),var(--color-primary-hover));border-radius:var(--radius-md);margin:0 auto 12px}.logo-icon svg{width:32px;height:32px;color:#fff}.logo-title{font-family:Outfit,sans-serif;font-size:32px;font-weight:700;color:var(--color-primary);line-height:1}.logo-subtitle{font-size:14px;color:var(--color-text-muted);margin-top:6px}.field-group{margin-bottom:16px}.field-label{display:block;font-size:13px;font-weight:600;color:var(--color-text);margin-bottom:6px;text-transform:uppercase;letter-spacing:.04em}.field-input{width:100%;font-size:16px;border:1.5px solid var(--color-border);border-radius:var(--radius-sm);padding:12px 16px;color:var(--color-text);background:var(--color-bg-card);transition:border-color var(--duration-fast),box-shadow var(--duration-fast);outline:none}.field-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #0891b21f}.field-input::placeholder{color:var(--color-text-muted);opacity:.7}.tabs{display:flex;border-bottom:2px solid var(--color-border);margin-bottom:24px;gap:0}.tab-btn{flex:1;padding:12px 8px;font-size:15px;font-weight:500;color:var(--color-text-muted);border-bottom:2px solid transparent;margin-bottom:-2px;transition:color var(--duration-fast),border-color var(--duration-fast);outline:none}.tab-btn:hover:not(.active){color:var(--color-text)}.tab-btn.active{color:var(--color-primary);border-bottom-color:var(--color-primary);font-weight:600}.tab-btn:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.btn-primary{width:100%;padding:14px 24px;font-size:16px;font-weight:600;background:var(--color-primary);color:#fff;border-radius:var(--radius-md);transition:background var(--duration-fast),transform var(--duration-fast),box-shadow var(--duration-fast);outline:none}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover);box-shadow:0 4px 16px #0891b24d}.btn-primary:active:not(:disabled){transform:scale(.98)}.btn-primary:focus-visible{outline:2px solid var(--color-primary);outline-offset:3px}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{padding:10px 16px;font-size:14px;font-weight:600;background:var(--color-bg);color:var(--color-primary);border:1.5px solid var(--color-border);border-radius:var(--radius-sm);transition:background var(--duration-fast),border-color var(--duration-fast);outline:none;white-space:nowrap;flex-shrink:0}.btn-secondary:hover{background:#e0f7fa;border-color:var(--color-primary)}.btn-secondary:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.btn-icon-sm{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius-sm);color:var(--color-text-muted);transition:background var(--duration-fast),color var(--duration-fast);outline:none}.btn-icon-sm:hover{background:var(--color-bg);color:var(--color-text)}.btn-icon-sm:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}#waiting-screen{text-align:center}.waiting-header{display:flex;align-items:center;gap:8px;margin-bottom:24px}.waiting-header-title{font-size:16px;font-weight:600;color:var(--color-text-muted)}.pulse-container{position:relative;width:80px;height:80px;margin:0 auto 24px}.pulse-ring{position:absolute;top:0;right:0;bottom:0;left:0;border:3px solid var(--color-primary);border-radius:50%;animation:pulse-ring 1.5s ease-out infinite}.pulse-ring:nth-child(2){animation-delay:.5s}.pulse-dot{position:absolute;top:14px;right:14px;bottom:14px;left:14px;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));border-radius:50%;display:flex;align-items:center;justify-content:center}.pulse-dot svg{width:22px;height:22px;color:#fff}@keyframes pulse-ring{0%{transform:scale(.85);opacity:.9}to{transform:scale(1.6);opacity:0}}.waiting-room-label{font-size:13px;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:8px}.room-code-display{font-family:Outfit,sans-serif;font-size:48px;font-weight:700;color:var(--color-primary);letter-spacing:.12em;line-height:1;margin-bottom:24px}.share-subtitle{font-size:13px;color:var(--color-text-muted);margin-bottom:10px}.share-row{display:flex;gap:8px;align-items:center}.share-link-input{flex:1;min-width:0;font-size:13px;padding:10px 12px;border:1.5px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text-muted);background:var(--color-bg);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;outline:none;cursor:default}#lobby-error{margin-top:12px;font-size:14px;color:var(--color-error);text-align:center;animation:fade-in var(--duration-fast) var(--ease)}@keyframes fade-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}#chat-view{height:100dvh;height:100vh;display:flex;flex-direction:column}.chat-header{display:flex;align-items:center;gap:12px;padding:12px 16px;background:linear-gradient(135deg,#0891b2,#0e7490);color:#fff;flex-shrink:0;z-index:var(--z-header);box-shadow:0 2px 8px #0891b240}.chat-header-center{flex:1;display:flex;flex-direction:column;align-items:center;gap:1px}.chat-header-brand{font-family:Outfit,sans-serif;font-size:18px;font-weight:700;letter-spacing:-.01em}.chat-room-code{font-size:11px;font-weight:500;letter-spacing:.1em;opacity:.7}.chat-peer-info{display:flex;align-items:center;gap:6px}.chat-peer-name{font-size:14px;font-weight:500;max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#peer-status{width:8px;height:8px;border-radius:50%;background:#4ade80;flex-shrink:0;box-shadow:0 0 6px #4ade8099}#peer-status.offline{background:#94a3b8;box-shadow:none}.chat-header-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius-sm);color:#ffffffd9;transition:background var(--duration-fast),color var(--duration-fast);outline:none;flex-shrink:0}.chat-header-btn:hover{background:#ffffff26;color:#fff}.chat-header-btn:focus-visible{outline:2px solid rgba(255,255,255,.7);outline-offset:2px}#messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:8px;scroll-behavior:smooth}#messages::-webkit-scrollbar{width:4px}#messages::-webkit-scrollbar-track{background:transparent}#messages::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:2px}.msg-sent,.msg-recv{max-width:70%;padding:10px 14px;border-radius:18px;box-shadow:var(--shadow-msg);animation:msg-in .2s var(--ease) both;word-break:break-word}.msg-sent{align-self:flex-end;background:var(--bubble-sent-bg);color:var(--bubble-sent-text);border-radius:18px 18px 4px}.msg-recv{align-self:flex-start;background:var(--bubble-recv-bg);color:var(--bubble-recv-text);border:1px solid var(--color-border);border-radius:18px 18px 18px 4px}.msg-nickname{font-size:10px;font-weight:600;margin-bottom:4px;text-transform:uppercase;letter-spacing:.04em;opacity:.7}.msg-text{font-size:15px;line-height:1.5;white-space:pre-wrap}.msg-image{display:block;max-width:240px;max-height:300px;border-radius:12px;cursor:pointer;transition:opacity var(--duration-fast);object-fit:cover}.msg-image:hover{opacity:.9}.msg-audio{display:block;max-width:240px;margin:4px 0;height:36px}.msg-audio::-webkit-media-controls-panel{background:#0891b214;border-radius:var(--radius-sm)}.msg-duration{font-size:11px;opacity:.65;margin-top:4px}.msg-audio-fallback{font-size:13px;opacity:.75;padding:6px 10px;background:#0000000f;border-radius:var(--radius-sm);margin:4px 0}.msg-time{font-size:10px;margin-top:4px;opacity:.6;text-align:right}.msg-recv .msg-time{text-align:left}@keyframes msg-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}#peer-left-banner{flex-shrink:0;background:#fffbeb;border-top:1px solid #FDE68A;border-bottom:1px solid #FDE68A;color:#92400e;font-size:14px;font-weight:500;text-align:center;padding:10px 16px}#typing-indicator{flex-shrink:0;display:flex;align-items:center;gap:6px;padding:4px 16px;min-height:28px}.typing-label{font-size:12px;color:var(--color-text-muted);font-style:italic}.typing-dots{display:flex;gap:3px;align-items:center}.typing-dots .dot{width:6px;height:6px;background:var(--color-text-muted);border-radius:50%;animation:bounce 1.2s ease-in-out infinite}.typing-dots .dot:nth-child(1){animation-delay:0ms}.typing-dots .dot:nth-child(2){animation-delay:.2s}.typing-dots .dot:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-6px)}}.input-bar{flex-shrink:0;display:flex;align-items:flex-end;gap:8px;padding:8px 12px;padding-bottom:max(16px,env(safe-area-inset-bottom));background:var(--color-bg-card);border-top:1px solid var(--color-border)}.media-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;flex-shrink:0;border-radius:50%;color:var(--color-text-muted);transition:background var(--duration-fast),color var(--duration-fast);outline:none;touch-action:none;user-select:none;-webkit-user-select:none}.media-btn:hover{background:var(--color-bg);color:var(--color-primary)}.media-btn:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.media-btn.recording{background:#fee2e2;color:var(--color-error);animation:recording-pulse 1s ease-in-out infinite}@keyframes recording-pulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}#msg-input{flex:1;font-size:16px;line-height:1.5;border:1.5px solid var(--color-border);border-radius:20px;padding:10px 16px;max-height:100px;resize:none;overflow-y:auto;color:var(--color-text);background:var(--color-bg);transition:border-color var(--duration-fast),box-shadow var(--duration-fast);outline:none}#msg-input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #0891b21a}#msg-input::placeholder{color:var(--color-text-muted);opacity:.65}.send-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;flex-shrink:0;border-radius:50%;background:var(--color-cta);color:#fff;transition:background var(--duration-fast),transform var(--duration-fast),box-shadow var(--duration-fast);outline:none}.send-btn:hover:not(:disabled){background:var(--color-cta-hover);box-shadow:0 4px 12px #22c55e59}.send-btn:active:not(:disabled){transform:scale(.93)}.send-btn:focus-visible{outline:2px solid var(--color-cta);outline-offset:3px}.send-btn:disabled{opacity:.5;cursor:not-allowed}.recording-row{flex:1;display:flex;align-items:center;gap:8px;padding:0 8px;pointer-events:none}.recording-timer{font-size:15px;font-weight:600;color:var(--color-error);font-variant-numeric:tabular-nums}.recording-hint{font-size:13px;color:var(--color-text-muted)}#img-modal{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000d9;z-index:var(--z-overlay);display:flex;align-items:center;justify-content:center;animation:fade-in .15s ease}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.img-modal-close{position:absolute;top:16px;right:16px;width:40px;height:40px;border-radius:50%;background:#ffffff26;color:#fff;display:flex;align-items:center;justify-content:center;transition:background var(--duration-fast);outline:none;cursor:pointer}.img-modal-close:hover{background:#ffffff40}.img-modal-close:focus-visible{outline:2px solid rgba(255,255,255,.7);outline-offset:2px}.img-modal-img{max-width:90vw;max-height:90vh;border-radius:var(--radius-md);object-fit:contain;box-shadow:0 8px 40px #00000080}@media (min-width: 769px){#chat-view{max-width:720px;margin:0 auto;box-shadow:var(--shadow-card);height:100vh}}