:root{--bg: #f2f2ef;--surface: #fafaf8;--card-bg: #ffffff;--surface-hover: #e8e8e4;--text: #2c2c2c;--text-muted: #6b6b6b;--primary: #5c4cd6;--primary-hover: #4a3bc4;--success: #0d9488;--danger: #c53030;--border: #e0e0e0;--shadow: rgba(0, 0, 0, .08);--shadow-hover: rgba(0, 0, 0, .12);--radius: 12px;--touch-min: 44px;--max-width: 430px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100%;height:100%}body{font-family:system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.4;-webkit-font-smoothing:antialiased}#root{max-width:var(--max-width);margin:0 auto;background:var(--bg);min-height:100vh}a{color:var(--primary);text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none}input,select,textarea{font-family:inherit;font-size:16px}input[type=number]{-moz-appearance:textfield}input[type=number]::-webkit-outer-spin-button,input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:var(--touch-min);padding:0 20px;border-radius:var(--radius);font-weight:600;transition:background .2s}.btn--primary{background:var(--primary);color:#fff}.btn--primary:hover{background:var(--primary-hover)}.btn--secondary{background:var(--surface-hover);color:var(--text)}.btn--secondary:hover{background:#ddd}.btn--danger{background:var(--danger);color:#fff}.btn--ghost{color:var(--primary)}.btn--ghost:hover{background:var(--surface-hover);color:var(--primary-hover)}.btn--block{width:100%}.card{background:var(--card-bg);border-radius:var(--radius);padding:16px;margin-bottom:12px;border:1px solid var(--border);box-shadow:0 1px 3px var(--shadow);transition:all .2s ease}.card:hover{box-shadow:0 4px 12px var(--shadow-hover);transform:translateY(-1px);border-color:var(--primary)}.card:active{transform:translateY(0);box-shadow:0 1px 3px var(--shadow)}.card:last-child{margin-bottom:0}.card--clickable{cursor:pointer;text-align:left;width:100%;display:block;font-family:inherit;font-size:inherit;color:inherit}.input-wrap{display:block;margin-bottom:16px}.input-label{display:block;margin-bottom:6px;color:var(--text-muted);font-size:14px}.input{width:100%;min-height:var(--touch-min);padding:0 14px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);color:var(--text)}.input:focus{outline:none;border-color:var(--primary)}.input-error{display:block;margin-top:4px;font-size:13px;color:var(--danger)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}.modal{width:100%;max-width:var(--max-width);max-height:90vh;overflow:auto;background:var(--surface);border-radius:var(--radius);box-shadow:0 8px 32px #0006}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid var(--border)}.modal-title{font-size:1.1rem}.modal-close{font-size:24px;line-height:1;color:var(--text-muted);min-height:var(--touch-min);min-width:var(--touch-min)}.modal-body{padding:16px}.avatar{display:inline-flex;align-items:center;justify-content:center;border-radius:50%;overflow:hidden;background:var(--primary);color:#fff;font-weight:600}.avatar img{width:100%;height:100%;object-fit:cover}.avatar--sm{width:28px;height:28px;font-size:12px}.avatar--md{width:40px;height:40px;font-size:16px}.avatar--lg{width:56px;height:56px;font-size:20px}.amount-input-wrap{margin-bottom:16px}.amount-input-inner{position:relative}.amount-input-inner .input{width:100%;min-height:var(--touch-min);padding:0 14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text)}.amount-input-inner .input:focus{outline:none;border-color:var(--primary)}.participant-picker{margin-bottom:16px}.participant-picker-label{display:block;margin-bottom:8px;color:var(--text-muted);font-size:14px}.participant-picker-list{display:flex;flex-wrap:wrap;gap:8px}.participant-chip{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:var(--surface-hover);border:2px solid transparent;color:var(--text);font-size:14px;min-height:var(--touch-min)}.participant-chip--selected{border-color:var(--primary);background:#6c5ce733}.page{padding:16px 16px 24px;min-height:100vh;display:flex;flex-direction:column}.page--with-bottom-actions{padding-bottom:calc(140px + env(safe-area-inset-bottom,0px))}.page-actions{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:var(--max-width);padding:16px;padding-bottom:max(16px,env(safe-area-inset-bottom,0px));background:var(--bg);border-top:1px solid var(--border);box-shadow:0 -2px 12px var(--shadow);z-index:50;display:flex;flex-direction:column;gap:8px}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.page-title{font-size:1.5rem}.nav-bottom{position:fixed;bottom:0;left:50%;transform:translate(-50%);max-width:var(--max-width);width:100%;display:flex;justify-content:space-around;padding:12px 16px;background:var(--surface);border-top:1px solid var(--border);z-index:100}.nav-bottom a{display:flex;flex-direction:column;align-items:center;gap:4px;color:var(--text-muted);font-size:12px}.nav-bottom a.active{color:var(--primary)}.login-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center;position:relative}.login-help-btn{position:fixed;top:16px;right:16px;width:44px;height:44px;display:flex;align-items:center;justify-content:center;color:var(--text-muted);border-radius:50%;transition:color .2s,background .2s}.login-help-btn:hover{color:var(--primary);background:var(--surface-hover)}.login-page h1{margin-bottom:8px;font-size:1.75rem}.login-page p{color:var(--text-muted);margin-bottom:32px}.login-page .btn{min-width:200px}.help-content{text-align:left;line-height:1.5}.help-content p{margin-bottom:12px;color:var(--text)}.help-content p:last-of-type{margin-bottom:0}.help-content ol{margin:16px 0;padding-left:20px}.help-content li{margin-bottom:10px;color:var(--text)}.help-content li:last-child{margin-bottom:0}.list-item{min-height:var(--touch-min);padding:12px 0;border-bottom:1px solid var(--border)}.list-item:last-child{border-bottom:none}.empty-state{text-align:center;padding:32px 16px;color:var(--text-muted)}.section-title{font-size:1rem;font-weight:600;margin-bottom:12px}.participant-dropdown-item:hover{background:var(--surface-hover)}.participant-dropdown-item:last-child{border-bottom:none}.home-button{position:fixed;bottom:24px;right:24px;width:56px;height:56px;min-height:56px;border-radius:50%;padding:0;box-shadow:0 4px 12px #5c4cd64d,0 2px 4px #0000001a;z-index:999;transition:all .2s ease}.home-button:hover{transform:scale(1.1);box-shadow:0 6px 16px #5c4cd666,0 3px 6px #00000026}.home-button:active{transform:scale(.95)}@media (max-width: 430px){.home-button{right:16px;bottom:16px}}