:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--fg: #1a1a1a;--bg: #f5f5f5;--card-bg: #fff;--border: #e0e0e0;--muted: #666;--primary: #2563eb;--primary-fg: #fff;--error: #b91c1c}@media(prefers-color-scheme:dark){:root{--fg: #f5f5f5;--bg: #1a1a1a;--card-bg: #262626;--border: #404040;--muted: #a3a3a3;--primary: #3b82f6;--primary-fg: #fff;--error: #ef4444}}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;color:var(--fg);background:var(--bg)}#root{min-height:100vh}button{font-family:inherit;cursor:pointer}input,select{font-family:inherit}.landing-page{min-height:100vh;display:flex;flex-direction:column;background:var(--bg)}.landing-container{max-width:1000px;margin:0 auto;padding:0 1.25rem;width:100%}.landing-header{background:var(--card-bg);border-bottom:1px solid var(--border);padding:1rem 0;position:sticky;top:0;z-index:100}.landing-header .landing-container{display:flex;justify-content:space-between;align-items:center}.landing-logo{font-size:1.5rem;font-weight:700;margin:0;color:var(--fg)}.landing-nav{display:flex;gap:1rem;align-items:center}.landing-nav .btn-text{color:var(--primary);text-decoration:none;font-weight:500;padding:.5rem 1rem;border-radius:6px;transition:all .2s}.landing-nav .btn-text:hover{background:var(--bg)}.landing-main{flex:1}.hero{padding:4rem 0;text-align:center}.hero h2{font-size:2.5rem;margin:0 0 1rem;color:var(--fg);line-height:1.2}.hero p{font-size:1.1rem;color:var(--muted);margin:0 0 2rem;max-width:600px;margin-left:auto;margin-right:auto}.hero-buttons{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.btn-large{padding:1rem 2rem!important;font-size:1rem!important}.btn-primary{display:inline-block;padding:.75rem 1.25rem;background:var(--primary);color:var(--primary-fg);border:none;border-radius:8px;font-size:.95rem;font-weight:600;cursor:pointer;text-decoration:none;transition:all .2s}.btn-primary:hover{filter:brightness(1.1);transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.btn-secondary{display:inline-block;padding:.75rem 1.25rem;background:var(--bg);color:var(--fg);border:1px solid var(--border);border-radius:8px;font-size:.95rem;font-weight:500;cursor:pointer;text-decoration:none;transition:all .2s}.btn-secondary:hover{border-color:var(--primary);color:var(--primary);background:transparent}.features{padding:4rem 0;background:var(--bg)}.features h2{font-size:2rem;margin:0 0 3rem;text-align:center;color:var(--fg)}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}.feature-card{padding:2rem;background:var(--card-bg);border:1px solid var(--border);border-radius:12px;text-align:center;transition:all .2s}.feature-card:hover{transform:translateY(-4px);box-shadow:0 8px 16px #0000001a;border-color:var(--primary)}.feature-icon{font-size:2.5rem;margin-bottom:1rem}.feature-card h3{font-size:1.1rem;margin:0 0 .75rem;color:var(--fg)}.feature-card p{font-size:.95rem;color:var(--muted);margin:0;line-height:1.6}.cta{padding:4rem 0;text-align:center}.cta h2{font-size:2rem;margin:0 0 1rem;color:var(--fg)}.cta p{font-size:1.1rem;color:var(--muted);margin:0 0 2rem}.landing-footer{background:var(--card-bg);border-top:1px solid var(--border);padding:2rem 0;margin-top:2rem}.landing-footer .landing-container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.landing-footer p{margin:0;font-size:.9rem;color:var(--muted)}.footer-links{display:flex;gap:1.5rem}.footer-links a{color:var(--primary);text-decoration:none;font-size:.9rem;transition:color .2s}.footer-links a:hover{text-decoration:underline}@media(max-width:640px){.hero h2{font-size:1.8rem}.hero p{font-size:1rem}.features h2,.cta h2{font-size:1.5rem}.hero-buttons{flex-direction:column}.landing-footer .landing-container{flex-direction:column;text-align:center}}.auth-page{max-width:360px;margin:0 auto;padding:2rem 1rem;min-height:100vh;display:flex;flex-direction:column;justify-content:center}.auth-page h1{font-size:1.75rem;margin:0 0 .25rem;text-align:center}.auth-tagline{color:var(--muted);text-align:center;margin:0 0 1.5rem;font-size:.95rem}.auth-form{display:flex;flex-direction:column;gap:.75rem}.auth-form input{padding:.75rem 1rem;border:1px solid var(--border);border-radius:8px;font-size:1rem;background:var(--bg);color:var(--fg)}.auth-form input:focus{outline:none;border-color:var(--primary)}.auth-form button{padding:.75rem 1rem;background:var(--primary);color:var(--primary-fg);border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;margin-top:.25rem}.auth-form button:disabled{opacity:.7;cursor:not-allowed}.auth-error{color:var(--error);font-size:.9rem;margin:0 0 .25rem}.auth-switch{text-align:center;margin-top:1.5rem;font-size:.95rem;color:var(--muted)}.auth-switch a{color:var(--primary);text-decoration:none}.auth-switch a:hover{text-decoration:underline}.auth-google{display:flex;justify-content:center;margin-bottom:.5rem}.auth-divider{display:flex;align-items:center;gap:1rem;margin:.75rem 0;color:var(--muted);font-size:.85rem}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--border)}.expense-sets-page{min-height:100vh;display:flex;flex-direction:column}.app-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.25rem;border-bottom:1px solid var(--border);background:var(--bg)}.app-header h1{font-size:1.25rem;margin:0}.header-user{display:flex;align-items:center;gap:.75rem}.user-name{font-size:.9rem;color:var(--muted);max-width:120px;overflow:hidden;text-overflow:ellipsis}.sets-main{flex:1;padding:1.25rem;max-width:480px;margin:0 auto;width:100%}.sets-actions{display:flex;gap:.75rem;margin-bottom:1.25rem}.btn-primary{padding:.75rem 1.25rem;background:var(--primary);color:var(--primary-fg);border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer}.btn-secondary{padding:.75rem 1.25rem;background:var(--bg);color:var(--fg);border:1px solid var(--border);border-radius:8px;font-size:1rem;cursor:pointer}.btn-text{background:none;border:none;color:var(--primary);font-size:.9rem;cursor:pointer;padding:.25rem 0}.sets-form{padding:1.25rem;margin-bottom:1.25rem}.sets-form h2{margin:0 0 1rem;font-size:1.1rem}.sets-form input,.sets-form select{width:100%;padding:.75rem 1rem;border:1px solid var(--border);border-radius:8px;font-size:1rem;margin-bottom:.75rem;box-sizing:border-box}.form-error{color:var(--error);font-size:.9rem;margin:0 0 .75rem}.form-actions{display:flex;justify-content:flex-end;gap:.75rem;margin-top:1rem}.sets-list h2{font-size:1rem;margin:0 0 .75rem;color:var(--muted)}.sets-list ul{list-style:none;padding:0;margin:0}.sets-list li{margin-bottom:.5rem}.set-card{display:block;padding:1rem 1.25rem;background:var(--card-bg);border:1px solid var(--border);border-radius:8px;text-decoration:none;color:inherit}.set-card:hover{border-color:var(--primary)}.set-name{display:block;font-weight:600}.set-meta{font-size:.85rem;color:var(--muted)}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:8px}.muted{color:var(--muted);font-size:.95rem}.avatar{display:inline-flex;align-items:center;justify-content:center;border-radius:50%;overflow:hidden;flex-shrink:0;color:#fff;font-weight:600;line-height:1}.avatar img{width:100%;height:100%;object-fit:cover}.avatar-initials{-webkit-user-select:none;user-select:none}.detail-page{min-height:100vh;display:flex;flex-direction:column;max-width:560px;margin:0 auto;width:100%}.btn-primary{padding:.75rem 1.25rem;background:var(--primary);color:var(--primary-fg);border:none;border-radius:8px;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .2s}.btn-primary:hover:not(:disabled){filter:brightness(1.1);transform:translateY(-1px);box-shadow:0 2px 8px #0000001f}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-text{background:none;border:none;color:var(--primary);font-size:.9rem;cursor:pointer;padding:.5rem .75rem;border-radius:6px;transition:all .2s;font-weight:500}.btn-text:hover{background:var(--bg);color:var(--primary)}.btn-text.small{padding:.4rem .6rem;font-size:.8rem}.detail-page .app-header{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:.75rem;padding:1rem 1.25rem}.back-link{color:var(--primary);text-decoration:none;font-size:.95rem}.detail-page .app-header h1{font-size:1.1rem;margin:0;overflow:hidden;text-overflow:ellipsis}.detail-share{padding:.75rem 1.25rem;background:var(--card-bg);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}.share-label{font-size:.85rem;color:var(--muted)}.share-code{font-family:monospace;font-size:.95rem;padding:.2rem .5rem;background:var(--bg);border-radius:4px}.detail-tabs{display:flex;border-bottom:1px solid var(--border);padding:0 1.25rem}.detail-tabs button{padding:.75rem 1rem;background:none;border:none;border-bottom:2px solid transparent;margin-bottom:-1px;font-size:1rem;color:var(--muted);cursor:pointer}.detail-tabs button.active{color:var(--fg);border-bottom-color:var(--primary);font-weight:600}.detail-main{flex:1;padding:1.25rem}.detail-actions{margin-bottom:1rem}.add-form,.edit-form{padding:1.25rem;margin-bottom:1.25rem}.add-form h2,.edit-form h2{margin:0 0 1rem;font-size:1.1rem}.add-form input[type=text],.add-form input[type=number],.add-form input[type=date],.add-form select,.edit-form input[type=text],.edit-form input[type=number],.edit-form input[type=date],.edit-form select{width:100%;padding:.75rem 1rem;border:1px solid var(--border);border-radius:8px;font-size:1rem;margin-bottom:.75rem;box-sizing:border-box;transition:border-color .2s,box-shadow .2s}.add-form input[type=text]:focus,.add-form input[type=number]:focus,.add-form input[type=date]:focus,.add-form select:focus,.edit-form input[type=text]:focus,.edit-form input[type=number]:focus,.edit-form input[type=date]:focus,.edit-form select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary, rgba(52, 120, 246, .1))}.form-row{display:flex;gap:.75rem}.form-row input{flex:1}.form-row select{width:auto;min-width:80px}.add-form .form-row,.edit-form .form-row{gap:.75rem;margin-bottom:.75rem}.split-fieldset{border:1px solid var(--border);border-radius:8px;padding:.75rem 1rem;margin-bottom:1rem;background:var(--bg);transition:border-color .2s}.split-fieldset:focus-within{border-color:var(--primary)}.split-fieldset legend{font-size:.9rem;color:var(--muted);padding:0 .25rem;font-weight:500}.checkbox-label{display:flex;align-items:center;gap:.5rem;margin:.5rem 0;cursor:pointer;font-size:.95rem;transition:color .2s}.checkbox-label:hover{color:var(--primary)}.checkbox-label input[type=checkbox]{width:18px;height:18px;cursor:pointer;accent-color:var(--primary)}.form-actions{display:flex;gap:.75rem;justify-content:flex-end;margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--border)}.form-actions button{padding:.65rem 1.25rem;font-size:.95rem;font-weight:500;border-radius:6px;transition:all .2s}.expense-list{list-style:none;padding:0;margin:0}.expense-item{padding:1rem 1.25rem;background:var(--card-bg);border:1px solid var(--border);border-radius:8px;margin-bottom:.5rem}.exp-desc{display:block;font-weight:600}.exp-amount{display:block;font-size:1.1rem;color:var(--primary)}.exp-meta{font-size:.85rem;color:var(--muted);display:flex;align-items:center;gap:.35rem}.settlement-main .card{padding:1.25rem;margin-bottom:1rem}.settlement-main h2{margin:0 0 .75rem;font-size:1rem}.settlement-currency{font-size:.9rem;color:var(--muted);margin:0 0 1rem}.balance-list,.transfer-list{list-style:none;padding:0;margin:0}.balance-list li,.transfer-list li{padding:.5rem 0;display:flex;justify-content:space-between;align-items:center}.balance-list .positive{color:var(--positive, green)}.balance-list .negative{color:var(--error)}.transfer-list li{flex-wrap:wrap;gap:.25rem}.balance-name,.transfer-person{display:inline-flex;align-items:center;gap:.35rem}.small{font-size:.8rem}.show-older{display:block;margin:1rem auto 0;font-size:.9rem}.people-card{padding:1.25rem;margin-bottom:1rem}.people-card h2{margin:0 0 .75rem;font-size:1rem}.share-instruction{font-size:.9rem;color:var(--muted);margin:0 0 .75rem}.share-link-section{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;padding:.75rem;background:var(--bg);border-radius:6px}.members-list{list-style:none;padding:0;margin:0}.member-item{padding:.75rem 0;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.75rem}.member-item:last-child{border-bottom:none}.member-info{display:flex;flex-direction:column;gap:.25rem}.member-name{font-weight:500;font-size:1rem}.member-joined{font-size:.85rem;color:var(--muted)}.expense-header{display:flex;justify-content:space-between;align-items:center}.btn-icon{background:none;border:none;cursor:pointer;font-size:1.1rem;padding:.5rem;opacity:.6;border-radius:6px;transition:all .2s}.btn-icon:hover{opacity:1;background:var(--border)}.edit-form{background:var(--card-bg);border:1px solid var(--border);border-radius:8px;box-shadow:0 1px 3px #0000000d;animation:slideDown .2s ease-out}@keyframes slideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.add-form{background:var(--card-bg);border:1px solid var(--border);border-radius:8px;box-shadow:0 1px 3px #0000000d}.exp-conversion{display:block;font-size:.85rem;color:var(--muted);font-weight:400}.exp-rate-warning{color:var(--error);font-size:.9rem;cursor:help}.member-item-wrapper{border-bottom:1px solid var(--border)}.member-item-wrapper:last-child{border-bottom:none}.member-expense-count{font-size:.8rem;color:var(--muted)}.expense-count-link{font-size:.8rem;padding:0}.bulk-add-form{padding:.75rem 0 .75rem 3rem;border-top:1px dashed var(--border)}.bulk-add-options{display:flex;flex-direction:column;gap:.5rem;margin-bottom:.75rem}.radio-label{display:flex;align-items:center;gap:.5rem;cursor:pointer;font-size:.9rem}.bulk-date-input{margin-left:1.5rem;padding:.5rem .75rem;border:1px solid var(--border);border-radius:6px;font-size:.9rem;width:auto}.join-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:1.25rem;max-width:360px;margin:0 auto}.join-page h1{margin:0 0 1rem;font-size:1.5rem}.join-prompt{margin:0 0 1rem;color:var(--muted);text-align:center}.join-page .btn-primary{margin-bottom:.75rem}.join-page .btn-text{font-size:.95rem}.join-page a{text-decoration:none}.privacy-page{min-height:100vh;display:flex;flex-direction:column;background:var(--bg)}.privacy-header{background:var(--card-bg);border-bottom:1px solid var(--border);padding:1.5rem 0}.privacy-header .privacy-container{display:flex;align-items:center;gap:1rem}.privacy-header h1{margin:0;font-size:1.5rem;color:var(--fg)}.back-link{color:var(--primary);text-decoration:none;font-size:.95rem;font-weight:500}.back-link:hover{text-decoration:underline}.privacy-container{max-width:800px;margin:0 auto;padding:0 1.25rem;width:100%}.privacy-main{flex:1;padding:2rem 0}.privacy-content{background:var(--card-bg);border:1px solid var(--border);border-radius:8px;padding:2rem}.privacy-content section{margin-bottom:2.5rem}.privacy-content section:last-child{margin-bottom:0}.privacy-content h2{font-size:1.3rem;margin:0 0 1rem;color:var(--fg)}.privacy-content p{margin:0 0 1rem;line-height:1.7;color:var(--fg)}.privacy-content p:last-child{margin-bottom:0}.privacy-content ul{margin:0 0 1rem;padding-left:1.5rem;color:var(--fg)}.privacy-content li{margin-bottom:.5rem;line-height:1.7}.privacy-content li:last-child{margin-bottom:0}.privacy-content strong{color:var(--primary)}.last-updated{font-size:.9rem;color:var(--muted);font-style:italic;margin:0 0 2rem;padding-bottom:1rem;border-bottom:1px solid var(--border)}.privacy-footer{background:var(--card-bg);border-top:1px solid var(--border);padding:1.5rem 0;text-align:center}.privacy-footer a{color:var(--primary);text-decoration:none;font-size:.95rem}.privacy-footer a:hover{text-decoration:underline}@media(max-width:640px){.privacy-content{padding:1.5rem}.privacy-content h2{font-size:1.1rem}.privacy-header h1{font-size:1.2rem}}
