:root{--tg-theme-bg-color: #ffffff;--tg-theme-text-color: #000000;--tg-theme-hint-color: #999999;--tg-theme-link-color: #2481cc;--tg-theme-button-color: #2481cc;--tg-theme-button-text-color: #ffffff;--tg-theme-secondary-bg-color: #f0f0f0;--tg-theme-section-bg-color: #ffffff;--positive: #34c759;--negative: #ff3b30;--border: rgba(0, 0, 0, .08);--radius: 12px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--tg-theme-secondary-bg-color);color:var(--tg-theme-text-color);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;padding-bottom:env(safe-area-inset-bottom,0)}.page{padding:16px;min-height:100vh}.card{background:var(--tg-theme-section-bg-color);border-radius:var(--radius);padding:16px;margin-bottom:12px}.card-title{font-size:13px;color:var(--tg-theme-hint-color);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}.amount{font-size:28px;font-weight:700;font-variant-numeric:tabular-nums}.amount.positive{color:var(--positive)}.amount.negative{color:var(--negative)}.list-item{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--border)}.list-item:last-child{border-bottom:none}.list-item-left{flex:1}.list-item-name{font-weight:500}.list-item-desc{font-size:13px;color:var(--tg-theme-hint-color);margin-top:2px}.list-item-amount{font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap}.btn{display:block;width:100%;padding:14px;border:none;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer;text-align:center;color:var(--tg-theme-button-text-color);background:var(--tg-theme-button-color)}.btn:active{opacity:.85}.btn-secondary{background:var(--tg-theme-secondary-bg-color);color:var(--tg-theme-text-color)}.input-group{margin-bottom:16px}.input-group label{display:block;font-size:13px;color:var(--tg-theme-hint-color);margin-bottom:6px}.input-group input,.input-group select{width:100%;padding:12px;border:1px solid var(--border);border-radius:8px;font-size:16px;background:var(--tg-theme-section-bg-color);color:var(--tg-theme-text-color);outline:none}.input-group input:focus{border-color:var(--tg-theme-button-color)}.member-chips{display:flex;flex-wrap:wrap;gap:8px}.member-chip{padding:6px 14px;border-radius:20px;font-size:14px;cursor:pointer;border:1px solid var(--border);background:var(--tg-theme-section-bg-color);color:var(--tg-theme-text-color);transition:all .15s}.member-chip.selected{background:var(--tg-theme-button-color);color:var(--tg-theme-button-text-color);border-color:var(--tg-theme-button-color)}.nav-bar{display:flex;position:fixed;bottom:0;left:0;right:0;background:var(--tg-theme-section-bg-color);border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom,0);z-index:100}.nav-item{flex:1;padding:8px 0;text-align:center;font-size:11px;color:var(--tg-theme-hint-color);text-decoration:none;cursor:pointer}.nav-item.active{color:var(--tg-theme-button-color)}.nav-icon{font-size:20px;display:block;margin-bottom:2px}.empty{text-align:center;padding:40px 20px;color:var(--tg-theme-hint-color)}.loading{text-align:center;padding:40px;color:var(--tg-theme-hint-color)}.arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px}.settle-item{display:flex;justify-content:space-between;align-items:center;padding:14px 0;border-bottom:1px solid var(--border)}.settle-item:last-child{border-bottom:none}.settle-btn{padding:6px 16px;border:none;border-radius:16px;font-size:13px;cursor:pointer;background:var(--positive);color:#fff}