:root{--bg:#f7f5f0;--teal:#2a6b6b;--teal-light:#3d8c8c;--gold:#d4a82a;--gold-light:#f5e9c0;--text:#1a1a2e;--text-muted:#6b6b7a;--card:#fff;--border:#e0ddd6;--danger:#c0392b;--success:#27ae60;--coral:#ff7657;--coral-light:#ff8a6e;--radius:10px}*{box-sizing:border-box;margin:0;padding:0}html,body{max-width:100vw}body{font-family:var(--font-noto-sans-jp), sans-serif;background:var(--bg);color:var(--text);min-height:100vh;padding-bottom:60px}header{background:var(--teal);color:#fff;text-align:center;z-index:100;padding:16px 20px 12px;position:sticky;top:0;box-shadow:0 2px 8px #00000026}header h1{letter-spacing:3px;font-size:22px;font-weight:900}header p{opacity:.75;letter-spacing:1px;margin-top:2px;font-size:11px}.modal-overlay{z-index:1000;background:#00000073;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal-card{text-align:center;background:#fff;border-radius:16px;width:100%;max-width:420px;padding:28px 20px;box-shadow:0 10px 30px #0003}.modal-title{color:var(--text);margin-bottom:12px;font-size:22px;font-weight:900}.modal-desc{color:var(--text-muted);margin-bottom:20px;font-size:14px;line-height:1.7}.url-box{border:1.5px solid var(--border);border-radius:30px;align-items:center;gap:8px;padding:6px 6px 6px 16px;display:flex}.url-text{color:var(--text);text-align:left;text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:13px;overflow:hidden}.btn-coral{background:var(--coral);color:#fff;border-radius:24px;flex-shrink:0;padding:10px 20px}.btn-coral:hover{background:var(--coral-light)}.copied-notice{color:var(--success);margin-top:8px;font-size:12px}.share-bar{background:var(--teal);align-items:center;gap:10px;padding:0 16px 12px;display:flex}.share-bar-badge{color:#ffffffd9;background:#ffffff26;border-radius:20px;padding:3px 9px;font-size:11px}.share-bar-copied{color:#fff;font-size:11px}.steps{background:var(--teal);gap:6px;padding:0 12px 12px;display:flex}.step-btn{color:#fff9;cursor:pointer;background:#ffffff26;border:none;border-radius:6px;flex:1;padding:7px 4px;font-size:11px;transition:all .2s;position:relative}.step-btn.active{color:var(--teal);background:#fff;font-weight:700}.step-btn .step-num{margin-bottom:2px;font-size:14px;font-weight:900;display:block}.step-btn.done{color:#fff;background:#ffffff59}.section{padding:16px}.card{background:var(--card);border-radius:var(--radius);border:1px solid var(--border);margin-bottom:12px;padding:16px;box-shadow:0 1px 4px #00000012}.card-title{color:var(--teal);letter-spacing:1px;text-transform:uppercase;margin-bottom:12px;font-size:12px;font-weight:700}label{color:var(--text-muted);margin-bottom:4px;font-size:13px;display:block}input[type=text],input[type=number],select,textarea{border:1px solid var(--border);background:var(--bg);width:100%;color:var(--text);border-radius:6px;outline:none;margin-bottom:10px;padding:9px 11px;font-family:inherit;font-size:14px;transition:border .2s}input:focus,select:focus,textarea:focus{border-color:var(--teal)}.btn{cursor:pointer;border:none;border-radius:7px;justify-content:center;align-items:center;gap:6px;padding:10px 18px;font-family:inherit;font-size:14px;font-weight:700;transition:all .15s;display:inline-flex}.btn-primary{background:var(--teal);color:#fff}.btn-primary:hover{background:var(--teal-light)}.btn-ghost{border:1.5px solid var(--border);color:var(--text-muted);background:0 0}.btn-gold{background:var(--gold);color:#fff}.btn-danger{border:1.5px solid var(--danger);color:var(--danger);background:#fff;padding:5px 10px;font-size:12px}.btn-full{width:100%}.btn-sm{padding:6px 12px;font-size:12px}.member-list{flex-direction:column;gap:8px;margin-bottom:12px;display:flex}.member-row{background:var(--bg);border-radius:7px;align-items:center;gap:8px;padding:8px 10px;display:flex}.member-avatar{background:var(--teal);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:13px;font-weight:700;display:flex}.member-name{flex:1;font-size:14px}.expense-list{flex-direction:column;gap:8px;margin-bottom:12px;display:flex}.expense-card{background:var(--bg);border-left:3px solid var(--teal);border-radius:8px;padding:10px 12px}.expense-top{justify-content:space-between;align-items:flex-start;display:flex}.expense-desc{font-size:14px;font-weight:700}.expense-amount{color:var(--teal);font-size:15px;font-weight:700}.expense-meta{color:var(--text-muted);margin-top:3px;font-size:11px}.expense-tags{flex-wrap:wrap;gap:4px;margin-top:5px;display:flex}.tag{background:var(--gold-light);color:#8b6914;border-radius:20px;padding:2px 7px;font-size:10px}.tag.payer{color:var(--teal);background:#e8f4f4}.currency-row{background:var(--bg);border-radius:7px;align-items:center;gap:8px;margin-bottom:8px;padding:10px 12px;display:flex}.currency-code{width:50px;font-size:14px;font-weight:700}.result-summary{background:var(--teal);color:#fff;border-radius:var(--radius);text-align:center;margin-bottom:12px;padding:16px}.result-summary .total{font-size:32px;font-weight:900}.result-summary .sub{opacity:.8;margin-top:4px;font-size:12px}.balance-row{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:10px 0;display:flex}.balance-row:last-child{border-bottom:none}.balance-name{font-size:14px}.balance-num{font-size:15px;font-weight:700}.balance-num.pos{color:var(--success)}.balance-num.neg{color:var(--danger)}.balance-num.zero{color:var(--text-muted)}.transfer-row{background:var(--bg);border-radius:7px;align-items:center;gap:8px;margin-bottom:6px;padding:10px 12px;font-size:13px;display:flex}.transfer-arrow{color:var(--teal);font-size:18px}.transfer-amount{color:var(--teal);margin-left:auto;font-weight:700}.mode-tabs{gap:6px;margin-bottom:10px;display:flex}.mode-tab{text-align:center;border:1.5px solid var(--border);cursor:pointer;background:var(--bg);color:var(--text-muted);border-radius:7px;flex:1;padding:8px;font-size:12px;transition:all .2s}.mode-tab.active{border-color:var(--teal);color:var(--teal);background:#e8f4f4;font-weight:700}.participant-section{background:var(--bg);border-radius:8px;margin-bottom:10px;padding:10px 12px}.participant-header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.participant-label{color:var(--text-muted);font-size:12px;font-weight:700}.participant-toggle{color:var(--teal);cursor:pointer;font-size:11px;text-decoration:underline}.participant-chips{flex-wrap:wrap;gap:6px;display:flex}.chip{border:1.5px solid var(--border);cursor:pointer;color:var(--text-muted);-webkit-user-select:none;user-select:none;background:#fff;border-radius:20px;align-items:center;gap:5px;padding:5px 10px;font-size:12px;transition:all .15s;display:flex}.chip.checked{border-color:var(--teal);color:var(--teal);background:#e8f4f4;font-weight:700}.split-panel{margin-top:8px}.member-split-row{border-bottom:1px solid var(--border);align-items:center;gap:8px;padding:7px 0;display:flex}.member-split-row:last-child{border-bottom:none}.member-split-row.excluded{opacity:.3;pointer-events:none}.split-avatar{background:var(--teal);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;font-size:11px;font-weight:700;display:flex}.split-name{flex:1;font-size:13px}.split-input{text-align:right;width:80px!important;margin-bottom:0!important;padding:5px 8px!important;font-size:13px!important}.role-select{border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:6px;padding:5px 8px;font-size:12px}.notice{color:var(--text-muted);text-align:center;padding:8px;font-size:12px}.row2{gap:8px;display:flex}.row2>*{flex:1}.section-nav{gap:8px;margin-top:8px;display:flex}.section-nav .btn{flex:1}.empty-state{text-align:center;color:var(--text-muted);padding:30px;font-size:13px}.divider{border:none;border-top:1px solid var(--border);margin:10px 0}