:root{--bg-dark:#050510;--card:#ffffff08;--input-bg:#ffffff0f;--border:#ffffff14;--text-main:#fff;--text-dim:#88a;--text-muted:#666;--cyan:#00f3ff;--purple:#bc13fe;--accent:gold;--accent-dim:#ffd70026;--font-mono:"JetBrains Mono", monospace}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-dark);color:var(--text-main);min-height:100vh;font-family:Inter,sans-serif;font-size:.9rem;line-height:1.6}.skip-link{background:var(--accent);color:#000;z-index:9999;border-radius:0 0 6px;padding:8px 16px;transition:top .2s;position:absolute;top:-40px;left:0}.skip-link:focus{top:0}.glass-navbar{z-index:100;backdrop-filter:blur(12px);border-bottom:1px solid var(--border);background:#050510eb;padding:0 1.5rem;position:sticky;top:0}.nav-link.active{color:var(--accent)!important}.calc-hero{text-align:center;background:radial-gradient(at 50% 0,#ffd7001f 0%,#0000 65%);padding:3rem 1.5rem 2rem}.calc-breadcrumb{color:var(--text-dim);flex-wrap:wrap;justify-content:center;align-items:center;gap:6px;margin-bottom:1rem;font-size:.78rem;display:flex}.calc-breadcrumb a{color:var(--text-dim);text-decoration:none}.calc-breadcrumb a:hover{color:var(--accent)}.calc-title{letter-spacing:-.5px;background:linear-gradient(135deg,gold 0%,#fff 60%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:.5rem;font-size:clamp(1.6rem,4vw,2.4rem);font-weight:800}.calc-subtitle{color:var(--text-dim);max-width:560px;margin:0 auto;font-size:.95rem}.outer-tabs{border:1px solid var(--border);background:#ffffff0a;border-bottom:none;border-radius:12px 12px 0 0;gap:4px;max-width:1600px;margin:0 auto;padding:6px 6px 0;display:flex}.outer-tab{color:var(--text-dim);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:8px 8px 0 0;flex:1;padding:10px 16px;font-size:.85rem;font-weight:600;transition:all .2s}.outer-tab:hover{color:var(--text-main);background:#ffffff0d}.outer-tab.active{background:var(--accent-dim);color:var(--accent);border-bottom:2px solid var(--accent)}.outer-tab-panel{display:none}.outer-tab-panel.active{display:block}.calc-wrapper{max-width:1600px;margin:0 auto;padding:0 1.5rem 2rem}.calc-grid{grid-template-columns:1fr 1fr;gap:1.5rem;padding-top:1rem;display:grid}@media (width<=900px){.calc-grid{grid-template-columns:1fr}}.input-card,.result-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:1.5rem}.input-card{border-left:3px solid var(--accent)}.result-card{border-left:3px solid var(--purple)}.card-label{letter-spacing:2px;text-transform:uppercase;color:var(--text-dim);margin-bottom:1.25rem;font-size:.75rem;font-weight:700}.field-group{margin-bottom:1.25rem}.field-group.inner{margin-bottom:0}.field-label{color:var(--text-dim);margin-bottom:6px;font-size:.8rem;font-weight:600;display:block}.two-col-fields{grid-template-columns:1fr 1fr;gap:10px;margin-bottom:1rem;display:grid}@media (width<=500px){.two-col-fields{grid-template-columns:1fr}}.input-prefix-wrap{align-items:center;display:flex}.input-prefix{color:var(--accent);font-family:var(--font-mono);background:#ffd7001a;border:1px solid #ffd70040;border-right:none;border-radius:8px 0 0 8px;padding:8px 12px;font-size:.85rem}.glass-input{background:var(--input-bg);border:1px solid var(--border);color:var(--text-main);border-radius:8px;outline:none;flex:1;width:100%;padding:8px 12px;font-size:.9rem;transition:border-color .2s}.glass-input:focus{border-color:var(--accent)}.input-prefix-wrap .glass-input{border-radius:0 8px 8px 0}.glass-input::placeholder{color:var(--text-muted)}select.glass-input{-webkit-appearance:none;appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238888aa' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-position:right 12px center;background-repeat:no-repeat;padding-right:32px}.section-label-row{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.subsection-label{letter-spacing:1.5px;text-transform:uppercase;color:var(--text-dim);border-top:1px solid var(--border);margin-bottom:.75rem;padding-top:.5rem;font-size:.78rem;font-weight:700}.add-btn{border:1px solid var(--accent);color:var(--accent);cursor:pointer;background:0 0;border-radius:20px;padding:5px 14px;font-size:.78rem;font-weight:700;transition:all .2s}.add-btn:hover{background:var(--accent);color:#000}.add-expense-btn{border:1px solid var(--accent);width:100%;color:var(--accent);cursor:pointer;background:#ffd70014;border-radius:10px;margin-top:.5rem;padding:10px;font-size:.85rem;font-weight:700;transition:all .2s}.add-expense-btn:hover{background:var(--accent);color:#000}.people-chips{flex-wrap:wrap;gap:8px;margin-top:4px;display:flex}.person-chip{background:var(--input-bg);border:1px solid var(--border);color:var(--text-main);cursor:default;border-radius:20px;align-items:center;gap:6px;padding:5px 12px 5px 6px;font-size:.82rem;display:flex}.person-avatar{color:#000;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;font-size:.7rem;font-weight:800;display:flex}.person-chip .del-person{color:var(--text-dim);cursor:pointer;background:0 0;border:none;padding:0 0 0 4px;font-size:.9rem;transition:color .2s}.person-chip .del-person:hover{color:#ff6b6b}.participant-checks{flex-wrap:wrap;gap:8px;margin-top:4px;display:flex}.participant-label{border:1px solid var(--border);background:var(--input-bg);cursor:pointer;color:var(--text-dim);border-radius:20px;align-items:center;gap:6px;padding:5px 12px;font-size:.8rem;transition:all .2s;display:flex}.participant-label input[type=checkbox]{accent-color:var(--accent)}.participant-label:has(input:checked){border-color:var(--accent);background:var(--accent-dim);color:var(--accent)}.custom-amounts-panel{margin-top:.75rem}.custom-amounts-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:8px;margin-top:6px;display:grid}.custom-amt-wrap{flex-direction:column;gap:4px;display:flex}.custom-amt-name{color:var(--text-dim);font-size:.75rem;font-weight:600}.custom-amt-input{background:var(--input-bg);border:1px solid var(--border);color:var(--text-main);border-radius:6px;outline:none;width:100%;padding:5px 8px;font-size:.82rem}.custom-amt-input:focus{border-color:var(--accent)}.empty-hint{color:var(--text-muted);padding:4px 0;font-size:.8rem;font-style:italic}.per-person-list{flex-direction:column;gap:8px;display:flex}.person-total-row{border:1px solid var(--border);background:#ffffff08;border-radius:10px;align-items:center;gap:10px;padding:10px 14px;display:flex}.person-total-avatar{color:#000;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:.78rem;font-weight:800;display:flex}.person-total-name{flex:1;font-size:.88rem;font-weight:600}.person-total-amt{font-family:var(--font-mono);color:var(--accent);font-size:1rem;font-weight:700}.trip-total-row{border-top:1px solid var(--border);justify-content:space-between;align-items:center;margin-top:.75rem;padding:10px 0;display:flex}.trip-total-label{font-size:.88rem;font-weight:700}.trip-total-value{font-family:var(--font-mono);color:var(--accent);font-size:1.2rem;font-weight:800}.log-header{justify-content:space-between;align-items:center;padding:1rem 0 .5rem;display:flex}.log-summary-row{color:var(--text-dim);font-size:.85rem}.log-summary-row strong{color:var(--accent);font-family:var(--font-mono)}.expense-log-table{flex-direction:column;gap:8px;margin-top:.5rem;display:flex}.log-row{background:var(--card);border:1px solid var(--border);border-radius:12px;grid-template-columns:1fr auto auto auto;align-items:center;gap:10px;padding:12px 16px;display:grid}.log-row-name{font-size:.88rem;font-weight:600}.log-badge{letter-spacing:.5px;text-transform:uppercase;border-radius:12px;padding:2px 10px;font-size:.7rem;font-weight:700}.badge-lodging{color:#60a5fa;background:#3b82f626}.badge-transport{color:#c084fc;background:#a855f726}.badge-meals{color:#4ade80;background:#22c55e26}.badge-activities{color:#fb923c;background:#f9731626}.badge-other{color:#94a3b8;background:#94a3b826}.log-row-amt{font-family:var(--font-mono);color:var(--accent);font-weight:700}.log-row-del{color:#ff6b6b;cursor:pointer;background:#ff323214;border:1px solid #ff323233;border-radius:6px;justify-content:center;align-items:center;width:26px;height:26px;font-size:.9rem;transition:all .2s;display:flex}.log-row-del:hover{background:#ff323233}.log-participants{color:var(--text-muted);grid-column:1/-1;font-size:.75rem}.settlement-header{padding:1rem 0 .5rem}.settlement-desc{color:var(--text-dim);margin-bottom:1rem;font-size:.82rem}.settlement-list{flex-direction:column;gap:8px;margin-bottom:1.5rem;display:flex}.settlement-item{background:var(--card);border:1px solid var(--border);border-radius:12px;align-items:center;gap:12px;padding:14px 18px;display:flex}.settlement-avatar{color:#000;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:.78rem;font-weight:800;display:flex}.settlement-text{flex:1}.settlement-text strong{color:var(--text-main)}.settlement-arrow{color:var(--text-dim)}.settlement-amt{font-family:var(--font-mono);color:var(--accent);font-size:1rem;font-weight:700}.settlement-actions{gap:8px;display:flex}.act-btn{border:1px solid var(--accent);color:var(--accent);cursor:pointer;background:#ffd70014;border-radius:8px;padding:8px 20px;font-size:.82rem;font-weight:700;transition:all .2s}.act-btn:hover{background:var(--accent);color:#000}.chart-wrap{margin-bottom:.5rem}.page-sections-outer{max-width:1600px;margin:0 auto;padding:0 1.5rem 3rem}.section-heading{color:var(--text-main);letter-spacing:-.3px;margin-bottom:1.25rem;font-size:1.1rem;font-weight:800}.how-section{margin-bottom:3rem}.how-steps{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;display:grid}.how-step{background:var(--card);border:1px solid var(--border);border-radius:14px;align-items:flex-start;gap:12px;padding:1.25rem;display:flex}.step-num{background:var(--accent-dim);color:var(--accent);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:.85rem;font-weight:800;display:flex}.step-body h3{margin-bottom:4px;font-size:.9rem;font-weight:700}.step-body p{color:var(--text-dim);font-size:.8rem;line-height:1.5}.faq-section{margin-bottom:3rem}.faq-list{flex-direction:column;display:flex}.faq-item{border-bottom:1px solid #ffffff0f}.faq-item__question{cursor:pointer;color:var(--text-main);user-select:none;justify-content:space-between;align-items:center;padding:14px 4px;font-size:.9rem;font-weight:600;list-style:none;transition:color .2s;display:flex}.faq-item__question::-webkit-details-marker{display:none}.faq-item__question:after{content:"+";font-family:var(--font-mono);color:var(--text-dim);flex-shrink:0;margin-left:16px;font-size:1.1rem;transition:color .2s}.faq-item[open] .faq-item__question:after{content:"−";color:var(--accent)}.faq-item__question:hover{color:var(--accent)}.faq-item__answer{color:var(--text-dim);padding:0 4px 14px;font-size:.85rem;line-height:1.75}.calc-related{margin-bottom:3rem}.related-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;display:grid}.related-card{background:var(--card);border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:4px;padding:1rem;text-decoration:none;transition:border-color .2s,transform .2s;display:flex}.related-card:hover{border-color:var(--accent);transform:translateY(-2px)}.related-icon{font-size:1.5rem}.related-name{color:var(--text-main);font-size:.88rem;font-weight:700}.related-desc{color:var(--text-dim);font-size:.78rem}.toast{border:1px solid var(--border);color:var(--text-main);z-index:9999;background:#1a1a2e;border-radius:10px;max-width:320px;padding:12px 18px;font-size:.82rem;animation:.3s toastIn;position:fixed;bottom:24px;right:24px;box-shadow:0 4px 20px #0006}.toast-success{border-left:3px solid #4ade80}.toast-warn{border-left:3px solid var(--accent)}.toast-error{border-left:3px solid #f44}@keyframes toastIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@media (width<=600px){.log-row{grid-template-columns:1fr auto}.log-row-del{grid-area:1/2}.log-badge{grid-column:1}.log-row-amt{grid-column:2}}[data-theme=light]{--bg-dark:#e8edf5;--card:#fff;--input-bg:#f0f4f9;--border:#0000001f;--text-main:#0f172a;--text-dim:#334155;--text-muted:#64748b;--accent-dim:#a162071a;--accent:#a16207}[data-theme=light] body{background:#e8edf5}[data-theme=light] .glass-navbar{backdrop-filter:blur(12px);background:#f8fafceb;border-bottom-color:#0000001a}[data-theme=light] .calc-hero{background:radial-gradient(at 50% 0,#a162071a 0%,#0000 65%)}[data-theme=light] .calc-title{background:linear-gradient(135deg,#a16207 0%,#0f172a 60%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}[data-theme=light] .outer-tabs{background:#0000000a;border-color:#0000001f}[data-theme=light] .outer-tab{color:#475569}[data-theme=light] .outer-tab:hover{color:#0f172a;background:#0000000a}[data-theme=light] .outer-tab.active{color:#a16207;background:#a162071a;border-bottom-color:#a16207}[data-theme=light] .input-card{background:#fff;border-color:#0000001f #0000001f #0000001f #a16207;box-shadow:0 2px 12px #00000014}[data-theme=light] .result-card{background:#fff;border-color:#0000001f #0000001f #0000001f #7c3aed;box-shadow:0 2px 12px #00000014}[data-theme=light] .glass-input{color:#0f172a;background:#f0f4f9;border-color:#00000026}[data-theme=light] .glass-input:focus{border-color:#a16207}[data-theme=light] .glass-input::placeholder{color:#0006}[data-theme=light] .glass-input option{color:#0f172a;background:#fff}[data-theme=light] .input-prefix{color:#a16207;background:#a162071a;border-color:#a1620740}[data-theme=light] .add-btn{color:#a16207;border-color:#a16207}[data-theme=light] .add-btn:hover{color:#fff;background:#a16207}[data-theme=light] .add-expense-btn{color:#a16207;background:#a1620714;border-color:#a16207}[data-theme=light] .add-expense-btn:hover{color:#fff;background:#a16207}[data-theme=light] .person-chip{color:#0f172a;background:#f0f4f9;border-color:#0000001f}[data-theme=light] .person-chip .del-person{color:#94a3b8}[data-theme=light] .person-chip .del-person:hover{color:#dc2626}[data-theme=light] .participant-label{color:#475569;background:#f0f4f9;border-color:#0000001f}[data-theme=light] .participant-label:has(input:checked){color:#a16207;background:#a1620714;border-color:#a16207}[data-theme=light] .custom-amt-input{color:#0f172a;background:#f0f4f9;border-color:#0000001f}[data-theme=light] .custom-amt-input:focus{border-color:#a16207}[data-theme=light] .custom-amt-name{color:#475569}[data-theme=light] .person-total-row{background:#edf2f9;border-color:#0000001a}[data-theme=light] .person-total-name{color:#0f172a}[data-theme=light] .person-total-amt{color:#a16207}[data-theme=light] .trip-total-row{border-top-color:#0000001a}[data-theme=light] .trip-total-label{color:#0f172a}[data-theme=light] .trip-total-value{color:#a16207}[data-theme=light] .subsection-label{color:#475569;border-top-color:#0000001a}[data-theme=light] .log-row{background:#fff;border-color:#0000001a;box-shadow:0 1px 4px #0000000d}[data-theme=light] .log-row-name{color:#0f172a}[data-theme=light] .log-row-amt{color:#a16207}[data-theme=light] .log-row-del{color:#dc2626;background:#dc26260f;border-color:#dc262633}[data-theme=light] .log-row-del:hover{background:#dc262626}[data-theme=light] .log-participants{color:#64748b}[data-theme=light] .log-summary-row strong{color:#a16207}[data-theme=light] .settlement-item{background:#fff;border-color:#0000001a;box-shadow:0 1px 4px #0000000d}[data-theme=light] .settlement-text strong{color:#0f172a}[data-theme=light] .settlement-arrow{color:#64748b}[data-theme=light] .settlement-amt{color:#a16207}[data-theme=light] .settlement-desc{color:#475569}[data-theme=light] .act-btn{color:#a16207;background:#a1620714;border-color:#a16207}[data-theme=light] .act-btn:hover{color:#fff;background:#a16207}[data-theme=light] .how-step{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}[data-theme=light] .step-num{color:#a16207;background:#a162071a}[data-theme=light] .step-body h3{color:#0f172a}[data-theme=light] .step-body p{color:#475569}[data-theme=light] .faq-item{border-bottom-color:#00000014}[data-theme=light] .faq-list{gap:8px}[data-theme=light] .faq-item{background:#fff;border:1px solid #0000001a;border-radius:10px;overflow:hidden;box-shadow:0 1px 4px #0000000f}[data-theme=light] .faq-item:hover{border-color:#a1620759}[data-theme=light] .faq-item[open]{border-color:#a1620766 #a1620766 #a1620766 #a16207;border-left-style:solid;border-left-width:3px}[data-theme=light] .faq-item__question{color:#0f172a;padding:14px 16px}[data-theme=light] .faq-item__question:after{color:#64748b}[data-theme=light] .faq-item[open] .faq-item__question:after,[data-theme=light] .faq-item__question:hover{color:#a16207}[data-theme=light] .faq-item__answer{color:#475569;border-top:1px solid #0000000f;padding:12px 16px 16px}[data-theme=light] .related-card{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}[data-theme=light] .related-card:hover{border-color:#a16207}[data-theme=light] .related-name{color:#0f172a}[data-theme=light] .related-desc{color:#475569}[data-theme=light] .toast{color:#0f172a;background:#fff;border-color:#00000026;box-shadow:0 4px 20px #0000001f}[data-theme=light] .empty-hint{color:#64748b}[data-theme=light] .section-heading{color:#0f172a}[data-theme=light] .card-label{color:#475569}