@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap";*{margin:0;padding:0;box-sizing:border-box}:root{--bg-dark: #0f0f1a;--bg-card: #1a1a2e;--bg-card-hover: #22223a;--bg-surface: #16162a;--bg-input: #1e1e36;--accent: #6c5ce7;--accent-light: #a29bfe;--accent-glow: rgba(108, 92, 231, .3);--accent-2: #00cec9;--accent-2-glow: rgba(0, 206, 201, .3);--green: #00b894;--green-light: #55efc4;--green-bg: rgba(0, 184, 148, .15);--red: #ff6b6b;--red-light: #ff8787;--red-bg: rgba(255, 107, 107, .15);--orange: #fdcb6e;--pink: #fd79a8;--text: #ffffff;--text-secondary: #b2b2cc;--text-muted: #6b6b8a;--border: rgba(255,255,255,.08);--border-light: rgba(255,255,255,.12);--glass: rgba(255,255,255,.05);--glass-strong: rgba(255,255,255,.1);--radius: 16px;--radius-sm: 12px;--radius-xs: 8px;--shadow: 0 4px 24px rgba(0,0,0,.3);--shadow-lg: 0 8px 40px rgba(0,0,0,.4);--shadow-glow: 0 0 30px var(--accent-glow)}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-dark);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}.app-container{max-width:480px;margin:0 auto;min-height:100vh;background:var(--bg-dark);position:relative}.page-header{display:flex;align-items:center;gap:12px;padding:16px 20px;background:var(--bg-surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.page-header h1{font-size:18px;font-weight:700}.back-btn{background:none;border:none;cursor:pointer;padding:6px;color:var(--text-secondary);display:flex;align-items:center;border-radius:10px;transition:all .2s}.back-btn:hover{background:var(--glass-strong);color:var(--text)}.auth-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;background:var(--bg-dark);background-image:radial-gradient(ellipse at 20% 50%,rgba(108,92,231,.15) 0%,transparent 50%),radial-gradient(ellipse at 80% 20%,rgba(0,206,201,.1) 0%,transparent 50%)}.auth-card{background:var(--bg-card);border-radius:24px;padding:36px 28px;width:100%;max-width:400px;box-shadow:var(--shadow-lg);border:1px solid var(--border);animation:scaleIn .4s ease}.auth-logo{text-align:center;margin-bottom:28px}.auth-logo h1{font-size:32px;font-weight:900;background:linear-gradient(135deg,var(--accent) 0%,var(--accent-2) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-1px}.auth-logo p{color:var(--text-muted);font-size:14px;margin-top:6px}.form-group{margin-bottom:16px}.form-group label{display:block;font-size:13px;font-weight:600;color:var(--text-secondary);margin-bottom:6px}.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 16px;border:1.5px solid var(--border-light);border-radius:var(--radius-sm);font-size:15px;font-family:inherit;transition:all .3s;outline:none;background:var(--bg-input);color:var(--text)}.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-muted)}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;border:none;transition:all .3s cubic-bezier(.4,0,.2,1);text-decoration:none;position:relative;overflow:hidden}.btn-primary{background:linear-gradient(135deg,var(--accent) 0%,#7c6cf0 100%);color:#fff;width:100%;box-shadow:0 4px 15px var(--accent-glow)}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 25px var(--accent-glow)}.btn-primary:active{transform:translateY(0)}.btn-success{background:linear-gradient(135deg,var(--green) 0%,#00d2a0 100%);color:#fff;box-shadow:0 4px 15px #00b8944d}.btn-success:hover{transform:translateY(-1px);box-shadow:0 6px 20px #00b89466}.btn-danger{background:linear-gradient(135deg,var(--red) 0%,#ee5a5a 100%);color:#fff}.btn-outline{background:transparent;border:1.5px solid var(--border-light);color:var(--text-secondary)}.btn-outline:hover{background:var(--glass-strong);border-color:var(--accent);color:var(--text)}.btn-sm{padding:8px 14px;font-size:13px;border-radius:var(--radius-xs)}.btn-block{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.btn-glass{background:var(--glass-strong);color:var(--text);border:1px solid var(--border-light);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.btn-glass:hover{background:#ffffff2e;border-color:var(--accent-light)}.auth-link{text-align:center;margin-top:20px;font-size:14px;color:var(--text-muted)}.auth-link a{color:var(--accent-light);font-weight:600;text-decoration:none;transition:color .2s}.auth-link a:hover{color:var(--accent)}.error-msg{background:var(--red-bg);color:var(--red);padding:12px 16px;border-radius:var(--radius-xs);font-size:14px;margin-bottom:16px;border:1px solid rgba(255,107,107,.2)}.dashboard-header{background:var(--bg-surface);background-image:radial-gradient(ellipse at 30% 0%,rgba(108,92,231,.2) 0%,transparent 60%),radial-gradient(ellipse at 80% 100%,rgba(0,206,201,.1) 0%,transparent 50%);padding:28px 20px 24px;border-bottom:1px solid var(--border)}.dashboard-header .greeting{font-size:14px;color:var(--text-muted);margin-bottom:4px}.dashboard-header .user-name{font-size:28px;font-weight:900;letter-spacing:-.5px;background:linear-gradient(135deg,var(--text) 0%,var(--text-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.dashboard-header .header-actions{display:flex;gap:8px;margin-top:16px}.dashboard-header .header-actions .btn{flex:1;padding:10px;font-size:13px}.section-title{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);padding:20px 20px 10px}.group-list{padding:0 16px}.group-card{display:flex;align-items:center;gap:14px;padding:16px;background:var(--bg-card);border-radius:var(--radius);margin-bottom:10px;cursor:pointer;text-decoration:none;color:inherit;transition:all .3s cubic-bezier(.4,0,.2,1);border:1px solid var(--border);animation:slideUp .4s ease 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20px;border-bottom:1px solid var(--border)}.group-header-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}.group-header-top .back-btn{color:var(--text-secondary)}.group-header h1{font-size:24px;font-weight:800}.invite-code{display:inline-flex;align-items:center;gap:6px;background:var(--glass-strong);padding:6px 14px;border-radius:20px;font-size:13px;margin-top:4px;cursor:pointer;border:1px solid var(--border-light);color:var(--accent-light);font-family:inherit;font-weight:600;letter-spacing:1px;transition:all .2s}.invite-code:hover{background:var(--accent-glow);border-color:var(--accent)}.group-nav{display:flex;gap:8px;margin-top:14px}.group-nav .btn{flex:1;padding:10px;font-size:12px}.ledger-title{font-size:12px;font-weight:700;color:var(--text-muted);padding:20px 20px 10px;text-transform:uppercase;letter-spacing:1px}.ledger-list{padding:0 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0%,#7c6cf0 100%);color:#fff;border:none;box-shadow:0 6px 30px var(--accent-glow);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s cubic-bezier(.4,0,.2,1);z-index:20}.fab:hover{transform:translate(208px) scale(1.1);box-shadow:0 8px 40px #6c5ce780}.fab:active{transform:translate(208px) scale(.95)}.split-options{display:flex;gap:8px;margin-bottom:16px}.split-option{flex:1;padding:10px;border:1.5px solid var(--border-light);border-radius:var(--radius-xs);background:var(--bg-card);cursor:pointer;text-align:center;font-size:13px;font-weight:600;font-family:inherit;color:var(--text-secondary);transition:all .2s}.split-option.active{border-color:var(--accent);background:#6c5ce726;color:var(--accent-light);box-shadow:0 0 15px var(--accent-glow)}.member-split-row{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--border)}.member-split-row .avatar{width:32px;height:32px;font-size:13px}.member-split-row .name{flex:1;font-size:14px;font-weight:500}.member-split-row input[type=number]{width:80px;padding:8px 10px;border:1.5px solid var(--border-light);border-radius:8px;font-size:14px;text-align:right;background:var(--bg-input);color:var(--text)}.member-split-row input[type=checkbox]{width:20px;height:20px;accent-color:var(--accent)}.activity-item{display:flex;gap:12px;padding:14px 16px;border-bottom:1px solid var(--border);animation:fadeIn .3s ease}.activity-dot{width:10px;height:10px;border-radius:50%;margin-top:5px;flex-shrink:0}.activity-dot.expense{background:var(--red);box-shadow:0 0 8px #ff6b6b66}.activity-dot.settle{background:var(--green);box-shadow:0 0 8px #00b89466}.activity-dot.join{background:var(--accent);box-shadow:0 0 8px var(--accent-glow)}.activity-dot.create{background:var(--accent-2);box-shadow:0 0 8px var(--accent-2-glow)}.activity-text{font-size:14px;line-height:1.5;color:var(--text-secondary)}.activity-text strong{font-weight:600;color:var(--text)}.activity-time{font-size:12px;color:var(--text-muted);margin-top:3px}.suggestion-card{display:flex;align-items:center;gap:12px;padding:16px;background:var(--green-bg);border-radius:var(--radius);margin-bottom:10px;border:1px solid rgba(0,184,148,.2);animation:slideUp .3s ease both}.suggestion-arrow{color:var(--green)}.suggestion-text{flex:1;font-size:14px;color:var(--text-secondary)}.suggestion-text strong{color:var(--text)}.suggestion-amount{font-weight:700;color:var(--green-light);font-size:17px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:flex-end;justify-content:center;z-index:100;animation:fadeIn .2s ease}.modal{background:var(--bg-card);border-radius:24px 24px 0 0;width:100%;max-width:480px;max-height:85vh;overflow-y:auto;padding:28px 24px;border:1px solid var(--border);border-bottom:none;animation:slideUp .3s cubic-bezier(.4,0,.2,1)}.modal h2{font-size:20px;font-weight:700;margin-bottom:16px}.loading-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--bg-dark)}.spinner{width:36px;height:36px;border:3px solid var(--border-light);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-small{display:flex;align-items:center;justify-content:center;padding:40px}.empty-state{text-align:center;padding:48px 20px;color:var(--text-muted)}.empty-state svg{margin-bottom:16px;opacity:.5}.empty-state h3{font-size:17px;font-weight:600;color:var(--text-secondary);margin-bottom:6px}.empty-state p{font-size:14px}.tabs{display:flex;border-bottom:2px solid var(--border);margin-bottom:16px}.tab{flex:1;padding:12px;text-align:center;font-size:13px;font-weight:600;color:var(--text-muted);background:none;border:none;border-bottom:2px solid transparent;margin-bottom:-2px;cursor:pointer;font-family:inherit;transition:all .2s}.tab.active{color:var(--accent-light);border-bottom-color:var(--accent)}.toast{position:fixed;bottom:100px;left:50%;transform:translate(-50%);background:var(--bg-card);color:var(--text);padding:12px 24px;border-radius:24px;font-size:14px;font-weight:500;z-index:200;animation:toastIn .3s ease;box-shadow:var(--shadow-lg);border:1px solid var(--border-light);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(20px) scale(.9)}to{opacity:1;transform:translate(-50%) translateY(0) scale(1)}}.member-row{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border);animation:fadeIn .3s ease}.chat-messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:6px;background:var(--bg-dark);background-image:radial-gradient(ellipse at 50% 0%,rgba(108,92,231,.05) 0%,transparent 60%)}.chat-bubble-wrap{display:flex;flex-direction:column;max-width:80%;animation:messageIn .3s ease}.chat-bubble-wrap.me{align-self:flex-end;align-items:flex-end}.chat-bubble-wrap.other{align-self:flex-start;align-items:flex-start}.chat-sender{font-size:11px;font-weight:600;color:var(--accent-light);margin-bottom:3px;margin-left:14px}.chat-bubble{padding:10px 16px;border-radius:18px;max-width:100%;word-wrap:break-word}.bubble-me{background:linear-gradient(135deg,var(--accent) 0%,#7c6cf0 100%);color:#fff;border-bottom-right-radius:6px}.bubble-other{background:var(--bg-card);color:var(--text);border-bottom-left-radius:6px;border:1px solid var(--border)}.chat-text{font-size:14px;line-height:1.5}.chat-time{font-size:10px;opacity:.6;margin-top:3px;text-align:right}.chat-input-bar{padding:10px 14px;border-top:1px solid var(--border);background:var(--bg-surface)}.chat-form{display:flex;align-items:center;gap:8px}.chat-input{flex:1;padding:12px 18px;border:1.5px solid var(--border-light);border-radius:24px;font-size:14px;font-family:inherit;outline:none;background:var(--bg-input);color:var(--text);transition:all .2s}.chat-input::placeholder{color:var(--text-muted)}.chat-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.chat-send-btn{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--accent) 0%,#7c6cf0 100%);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .2s;box-shadow:0 2px 10px var(--accent-glow)}.chat-send-btn:hover{transform:scale(1.05)}.chat-send-btn:disabled{background:var(--bg-card);box-shadow:none;cursor:not-allowed;color:var(--text-muted)}.chat-mic-btn,.chat-img-btn{width:42px;height:42px;border-radius:50%;background:var(--glass-strong);color:var(--text-secondary);border:1px solid var(--border);cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .2s}.chat-mic-btn:hover{background:var(--red-bg);color:var(--red);border-color:var(--red)}.chat-img-btn:hover{background:#6c5ce726;color:var(--accent-light);border-color:var(--accent)}.recording-bar{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--red-bg);border-radius:24px;border:1px solid rgba(255,107,107,.2)}.recording-dot{width:12px;height:12px;border-radius:50%;background:var(--red);animation:pulse 1s infinite;box-shadow:0 0 10px #ff6b6b80}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.85)}}.recording-time{font-size:15px;font-weight:600;color:var(--red)}.voice-msg{display:flex;align-items:center;gap:10px;cursor:pointer;min-width:160px;padding:2px 0}.voice-play-btn{width:34px;height:34px;border-radius:50%;border:none;background:#fff3;color:inherit;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;transition:background .2s}.voice-play-btn:hover{background:#ffffff4d}.bubble-other .voice-play-btn{background:var(--glass-strong);color:var(--text-secondary)}.voice-wave-container{flex:1;display:flex;flex-direction:column;gap:4px}.voice-wave-bg{height:4px;background:#fff3;border-radius:2px;overflow:hidden}.bubble-other .voice-wave-bg{background:var(--border-light)}.voice-wave-progress{height:100%;background:#fff;border-radius:2px;transition:width .1s linear}.bubble-other .voice-wave-progress{background:var(--accent)}.voice-duration{font-size:11px;opacity:.7}.chat-image{max-width:220px;max-height:220px;border-radius:14px;cursor:pointer;object-fit:cover;transition:all .3s}.chat-image:hover{transform:scale(1.03);filter:brightness(1.1)}.image-viewer-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000f2;display:flex;align-items:center;justify-content:center;z-index:300;animation:fadeIn .2s ease}.image-viewer-close{position:absolute;top:16px;right:16px;background:var(--glass-strong);border:1px solid var(--border-light);color:#fff;width:42px;height:42px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center}.image-viewer-img{max-width:90vw;max-height:85vh;border-radius:12px;object-fit:contain}.profile-section{display:flex;flex-direction:column;align-items:center;padding:32px 20px 20px;background:var(--bg-surface);background-image:radial-gradient(ellipse at 50% 0%,rgba(108,92,231,.2) 0%,transparent 60%);border-bottom:1px solid var(--border)}.profile-avatar-wrap{position:relative;width:96px;height:96px;border-radius:50%;cursor:pointer;overflow:hidden;border:3px solid var(--accent);box-shadow:0 0 25px var(--accent-glow)}.profile-avatar-img{width:96px;height:96px;border-radius:50%;object-fit:cover}.profile-avatar-placeholder{width:96px;height:96px;border-radius:50%;background:linear-gradient(135deg,var(--accent) 0%,#7c6cf0 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10px;border-radius:12px;font-size:11px;font-weight:600;background:var(--glass-strong);color:var(--text-secondary);border:1px solid var(--border)}@media(max-width:480px){.app-container{max-width:100%}.fab{right:24px;transform:none}.fab:hover{transform:scale(1.1)}.fab:active{transform:scale(.95)}}