:root{--bg-primary: #0f0f23;--bg-secondary: #1a1a2e;--bg-tertiary: #16213e;--bg-card: rgba(26, 26, 46, .8);--accent-primary: #667eea;--accent-secondary: #764ba2;--accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);--accent-glow: rgba(102, 126, 234, .4);--text-primary: #f0f0f0;--text-secondary: #a0a0b8;--text-muted: #6b6b80;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-md: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.5rem;--font-size-2xl: 2rem;--font-size-3xl: 3rem;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .2);--shadow-md: 0 4px 16px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .4);--shadow-glow: 0 0 20px var(--accent-glow);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s ease;--safe-area-top: env(safe-area-inset-top, 0px);--safe-area-bottom: env(safe-area-inset-bottom, 0px)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-tap-highlight-color:transparent}body{font-family:var(--font-family);background:var(--bg-primary);color:var(--text-primary);min-height:100vh;min-height:100dvh;overflow:hidden;line-height:1.5;-webkit-font-smoothing:antialiased}#app{width:100%;height:100vh;height:100dvh;position:relative;overflow:hidden}.screen{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;flex-direction:column;opacity:0;visibility:hidden;transition:opacity var(--transition-normal),visibility var(--transition-normal)}.screen.active{opacity:1;visibility:visible}#loading-screen{background:var(--bg-primary);justify-content:center;align-items:center}.loading-content{display:flex;flex-direction:column;align-items:center;gap:var(--space-xl)}.logo-pulse{width:120px;height:120px;border-radius:var(--radius-full);background:var(--accent-gradient);display:flex;align-items:center;justify-content:center;animation:pulse 2s ease-in-out infinite;box-shadow:var(--shadow-glow)}.logo-number{font-size:var(--font-size-3xl);font-weight:700;color:#fff}@keyframes pulse{0%,to{transform:scale(1);box-shadow:0 0 20px var(--accent-glow)}50%{transform:scale(1.05);box-shadow:0 0 40px var(--accent-glow)}}.loading-text{font-size:var(--font-size-lg);color:var(--text-secondary)}.loading-bar{width:200px;height:4px;background:var(--bg-tertiary);border-radius:var(--radius-full);overflow:hidden}.loading-progress{width:30%;height:100%;background:var(--accent-gradient);border-radius:var(--radius-full);animation:loading 1.5s ease-in-out infinite}@keyframes loading{0%{transform:translate(-100%)}50%{transform:translate(200%)}to{transform:translate(-100%)}}#permission-screen{background:var(--bg-primary);justify-content:center;align-items:center;padding:var(--space-xl)}.permission-content{max-width:340px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:var(--space-lg)}.icon-wrapper{width:80px;height:80px;border-radius:var(--radius-full);background:var(--bg-secondary);display:flex;align-items:center;justify-content:center;margin-bottom:var(--space-md)}.location-icon{width:40px;height:40px;color:var(--accent-primary)}.permission-content h1{font-size:var(--font-size-xl);font-weight:600}.permission-content p{color:var(--text-secondary);font-size:var(--font-size-md)}.btn-primary{width:100%;padding:var(--space-md) var(--space-xl);font-size:var(--font-size-md);font-weight:600;color:#fff;background:var(--accent-gradient);border:none;border-radius:var(--radius-lg);cursor:pointer;transition:transform var(--transition-fast),box-shadow var(--transition-fast);box-shadow:var(--shadow-md)}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-glow)}.btn-primary:active{transform:translateY(0)}.privacy-note{font-size:var(--font-size-xs);color:var(--text-muted)}#chat-screen{background:var(--bg-primary);padding-top:var(--safe-area-top);padding-bottom:var(--safe-area-bottom)}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-md) var(--space-lg);background:var(--bg-secondary);border-bottom:1px solid rgba(255,255,255,.05);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.header-left,.header-right{width:48px}.logo-small{font-size:var(--font-size-lg);font-weight:700;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-center{display:flex;align-items:center;gap:var(--space-sm);font-size:var(--font-size-sm)}.member-count{color:var(--accent-primary);font-weight:600}.header-dot{color:var(--text-muted)}.group-status{color:var(--text-secondary)}.icon-btn{width:40px;height:40px;border-radius:var(--radius-full);background:transparent;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background var(--transition-fast)}.icon-btn svg{width:20px;height:20px;color:var(--text-secondary)}.icon-btn:hover{background:var(--bg-tertiary)}.messages-container{flex:1;overflow-y:auto;padding:var(--space-md);display:flex;flex-direction:column}.messages{display:flex;flex-direction:column;gap:var(--space-sm);margin-top:auto}.message{max-width:85%;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.sent{align-self:flex-end}.message.received{align-self:flex-start}.message-header{display:flex;align-items:center;gap:var(--space-sm);margin-bottom:var(--space-xs);padding:0 var(--space-sm)}.message-avatar{width:24px;height:24px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-size:var(--font-size-xs);font-weight:600;color:#fff}.message-author{font-size:var(--font-size-xs);color:var(--text-muted);font-weight:500}.message-distance{font-size:var(--font-size-xs);color:var(--accent-primary);font-weight:500;opacity:.8}.message-bubble{padding:var(--space-sm) var(--space-md);border-radius:var(--radius-lg);line-height:1.4}.message.sent .message-bubble{background:var(--accent-gradient);color:#fff;border-bottom-right-radius:var(--space-xs)}.message.received .message-bubble{background:var(--bg-secondary);color:var(--text-primary);border-bottom-left-radius:var(--space-xs)}.message-time{font-size:var(--font-size-xs);color:var(--text-muted);text-align:right;margin-top:var(--space-xs);padding-right:var(--space-sm)}.message.system{align-self:center;max-width:none}.message.system .message-bubble{background:transparent;color:var(--text-muted);font-size:var(--font-size-sm);padding:var(--space-sm)}.typing-indicator{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);color:var(--text-muted);font-size:var(--font-size-sm);transition:opacity var(--transition-fast)}.typing-indicator.hidden{opacity:0;height:0;padding:0;overflow:hidden}.typing-dots{display:flex;gap:4px}.typing-dots span{width:6px;height:6px;background:var(--text-muted);border-radius:var(--radius-full);animation:typingDot 1.4s ease-in-out infinite}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}@keyframes typingDot{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-4px)}}.message-form{padding:var(--space-md);background:var(--bg-secondary);border-top:1px solid rgba(255,255,255,.05)}.input-wrapper{display:flex;align-items:center;gap:var(--space-sm);background:var(--bg-tertiary);border-radius:var(--radius-xl);padding:var(--space-xs) var(--space-xs) var(--space-xs) var(--space-md)}#message-input{flex:1;background:transparent;border:none;color:var(--text-primary);font-size:var(--font-size-md);font-family:var(--font-family);padding:var(--space-sm) 0;outline:none}#message-input::placeholder{color:var(--text-muted)}.send-btn{width:44px;height:44px;border-radius:var(--radius-full);background:var(--accent-gradient);border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:transform var(--transition-fast),opacity var(--transition-fast);opacity:.5}.send-btn:not(:disabled){opacity:1}.send-btn:not(:disabled):hover{transform:scale(1.05)}.send-btn:not(:disabled):active{transform:scale(.95)}.send-btn svg{width:20px;height:20px;color:#fff;transform:translate(1px)}.modal{position:fixed;top:0;left:0;width:100%;height:100%;z-index:100;display:flex;align-items:flex-end;transition:opacity var(--transition-normal),visibility var(--transition-normal)}.modal.hidden{opacity:0;visibility:hidden}.modal-backdrop{position:absolute;top:0;left:0;width:100%;height:100%;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal-content{position:relative;width:100%;max-height:70vh;background:var(--bg-secondary);border-radius:var(--radius-xl) var(--radius-xl) 0 0;padding:var(--space-lg);padding-bottom:calc(var(--space-lg) + var(--safe-area-bottom));transform:translateY(0);transition:transform var(--transition-normal);overflow-y:auto}.modal.hidden .modal-content{transform:translateY(100%)}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-lg)}.modal-header h2{font-size:var(--font-size-lg);font-weight:600}.members-list{display:flex;flex-direction:column;gap:var(--space-sm)}.member-item{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md);background:var(--bg-tertiary);border-radius:var(--radius-md)}.member-avatar{width:40px;height:40px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-weight:600;color:#fff}.member-info{flex:1}.member-name{font-weight:500}.member-status{font-size:var(--font-size-sm);color:var(--text-muted)}.member-item.you .member-name:after{content:" (you)";color:var(--accent-primary);font-weight:400}.status-dot{width:8px;height:8px;border-radius:var(--radius-full);background:var(--success)}.member-distance{font-size:var(--font-size-sm);font-weight:600;color:var(--accent-primary);background:#667eea26;padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-full);margin-right:var(--space-sm)}.hidden{display:none!important}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:var(--radius-full)}@media(min-width:768px){.modal{align-items:center;justify-content:center;padding:var(--space-xl)}.modal-content{max-width:400px;max-height:60vh;border-radius:var(--radius-xl)}.modal.hidden .modal-content{transform:translateY(20px)}.message{max-width:60%}}