@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Poppins:wght@600;700&display=swap";:root{--bg-primary: #ffffff;--bg-secondary: #f8f9fa;--bg-tertiary: #f0f1f3;--surface: #ffffff;--surface-hover: #f5f6f7;--border: #e5e7eb;--border-light: #f0f1f3;--text-primary: #1a202c;--text-secondary: #4a5568;--text-tertiary: #718096;--accent: #3b82f6;--accent-light: #dbeafe;--accent-dark: #1e40af;--success: #10b981;--success-light: #d1fae5;--error: #ef4444;--error-light: #fee2e2;--warning: #f59e0b;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-md: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, .1);--radius: 8px;--radius-lg: 12px;--radius-xl: 16px;--transition: all .2s ease;font-family:Inter,sans-serif;color:var(--text-primary)}*{box-sizing:border-box;margin:0;padding:0}body{margin:0;background:var(--bg-secondary);min-height:100vh;line-height:1.5;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}#root{min-height:100vh}button{cursor:pointer;border:none;font-family:inherit;transition:var(--transition)}input,select,textarea{font-family:inherit}.auth-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#3b82f6,#1e40af);padding:20px}.auth-container{width:100%;max-width:420px}.auth-card{background:var(--bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:40px;animation:slideUp .4s ease}.auth-header{text-align:center;margin-bottom:32px}.auth-logo-icon{font-size:48px;margin-bottom:16px}.auth-header h1{font-size:28px;font-weight:700;margin-bottom:8px;font-family:Poppins,sans-serif}.auth-header p{color:var(--text-secondary);font-size:14px}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:24px;background:var(--bg-secondary);padding:4px;border-radius:var(--radius)}.auth-tab{padding:8px;border-radius:6px;font-size:14px;font-weight:500;color:var(--text-secondary);background:transparent;transition:var(--transition)}.auth-tab.active{background:var(--bg-primary);color:var(--accent);box-shadow:var(--shadow-sm)}.auth-form{display:flex;flex-direction:column;gap:16px;margin-bottom:24px}.form-field{display:flex;flex-direction:column;gap:6px}.form-field label{font-size:13px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.form-field input{padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;background:var(--bg-secondary);color:var(--text-primary);transition:var(--transition)}.form-field input:focus{outline:none;border-color:var(--accent);background:var(--bg-primary);box-shadow:0 0 0 3px var(--accent-light)}.form-field input::placeholder{color:var(--text-tertiary)}.error-alert{padding:12px;background:var(--error-light);border:1px solid #fecaca;border-radius:var(--radius);color:#991b1b;font-size:13px;font-weight:500;animation:shake .3s ease}.auth-submit{padding:12px 16px;background:linear-gradient(135deg,#3b82f6,#1e40af);color:#fff;border-radius:var(--radius);font-size:14px;font-weight:600;margin-top:8px;transition:var(--transition)}.auth-submit:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow)}.auth-submit:disabled{opacity:.6;cursor:not-allowed}.auth-footer{text-align:center;font-size:14px;color:var(--text-secondary)}.auth-link{background:none;color:var(--accent);font-weight:600;padding:0;border:none}.auth-link:hover{text-decoration:underline}.app-container{display:flex;flex-direction:column;min-height:100vh;background:var(--bg-secondary)}.app-header{background:var(--bg-primary);border-bottom:1px solid var(--border);padding:0 24px;height:70px;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:100}.header-brand h1{font-size:20px;font-weight:700;font-family:Poppins,sans-serif;margin:0}.header-user{display:flex;align-items:center;gap:16px}.user-badge{display:flex;align-items:center;gap:12px;padding:8px 12px;border-radius:var(--radius);background:var(--bg-secondary)}.user-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#3b82f6,#1e40af);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:13px}.user-details{display:flex;flex-direction:column;gap:2px}.user-name{font-size:13px;font-weight:600;color:var(--text-primary)}.user-email{font-size:12px;color:var(--text-tertiary)}.logout-button{padding:8px 12px;background:var(--error-light);color:var(--error);border-radius:var(--radius);font-size:13px;font-weight:600;transition:var(--transition)}.logout-button:hover{background:#fecaca}.main-content{flex:1;padding:24px;overflow-y:auto}.dashboard-grid{display:grid;grid-template-columns:280px 1fr;gap:24px;max-width:1400px;margin:0 auto}.sidebar{display:flex;flex-direction:column;gap:16px}.card{background:var(--bg-primary);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:var(--transition)}.card:hover{box-shadow:var(--shadow)}.card.compact{padding:16px}.card-title{font-size:16px;font-weight:700;margin-bottom:16px;font-family:Poppins,sans-serif}.card-title-sm{font-size:14px;font-weight:600;margin-bottom:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-secondary);font-family:Poppins,sans-serif}.form-inline{display:flex;gap:8px;margin-bottom:12px}.form-inline input{flex:1;padding:8px 10px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;background:var(--bg-secondary);color:var(--text-primary)}.form-inline input:focus{outline:none;border-color:var(--accent);background:var(--bg-primary)}.form-inline button{padding:8px 12px;background:var(--accent);color:#fff;border-radius:var(--radius);font-size:14px;font-weight:600}.form-inline button:hover{background:var(--accent-dark)}.group-buttons{display:flex;flex-direction:column;gap:8px}.group-btn{display:flex;justify-content:space-between;align-items:center;padding:12px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);font-size:13px;font-weight:500;color:var(--text-primary);text-align:left;transition:var(--transition)}.group-btn:hover{background:var(--bg-tertiary);border-color:var(--accent)}.group-btn.active{background:linear-gradient(135deg,var(--accent-light) 0%,#e0f2fe 100%);border-color:var(--accent);color:var(--accent);font-weight:600}.group-name{flex:1}.group-count{background:var(--text-tertiary);color:#fff;border-radius:999px;width:24px;height:24px;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:600}.empty-state{text-align:center;color:var(--text-tertiary);font-size:13px;padding:16px}.empty-card{grid-column:1 / -1;background:var(--bg-primary);border:2px dashed var(--border);border-radius:var(--radius-lg);padding:60px 40px;text-align:center}.empty-icon{font-size:64px;margin-bottom:16px}.empty-card h2{font-size:20px;font-weight:600;margin-bottom:8px}.empty-card p{color:var(--text-secondary);font-size:14px}.top-section{display:grid;grid-template-columns:auto 1fr;gap:16px;margin-bottom:16px}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.stat{display:flex;flex-direction:column;gap:4px}.stat-label{font-size:12px;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px;font-weight:600}.stat-value{font-size:18px;font-weight:700;color:var(--accent)}.member-pills{display:flex;flex-wrap:wrap;gap:8px}.pill{display:inline-block;padding:6px 10px;background:var(--accent-light);color:var(--accent);border-radius:999px;font-size:12px;font-weight:600}.expense-form{display:flex;flex-direction:column;gap:12px}.form-row{display:grid;grid-template-columns:1fr auto;gap:8px}.expense-form input,.expense-form select{padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;background:var(--bg-secondary);color:var(--text-primary)}.expense-form input:focus,.expense-form select:focus{outline:none;border-color:var(--accent);background:var(--bg-primary)}.expense-form select{width:auto;min-width:120px}.split-type{display:flex;gap:16px;padding-top:8px}.split-type label{display:flex;align-items:center;gap:6px;font-size:13px;font-weight:500;cursor:pointer}.split-type input{cursor:pointer;accent-color:var(--accent)}.participants-section{display:flex;flex-direction:column;gap:8px;padding:12px;background:var(--bg-secondary);border-radius:var(--radius)}.participant-item{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:8px;padding:8px;border-radius:6px;cursor:pointer;transition:var(--transition)}.participant-item:hover{background:var(--bg-tertiary)}.participant-item.selected{background:var(--accent-light)}.participant-item input{cursor:pointer;accent-color:var(--accent)}.participant-item input[type=number]{width:70px;padding:6px 8px;border:1px solid var(--border);border-radius:4px;font-size:12px}.error-message{padding:10px 12px;background:var(--error-light);border:1px solid #fecaca;border-radius:var(--radius);color:#991b1b;font-size:12px;font-weight:500}.submit-btn{padding:11px 16px;background:linear-gradient(135deg,#3b82f6,#1e40af);color:#fff;border-radius:var(--radius);font-size:13px;font-weight:600;margin-top:8px;transition:var(--transition)}.submit-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.balances-list{display:flex;flex-direction:column;gap:8px}.balance-item{display:flex;justify-content:space-between;align-items:center;padding:12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-secondary);transition:var(--transition)}.balance-item.positive{background:var(--success-light);border-color:#86efac}.balance-item.negative{background:var(--error-light);border-color:#fecaca}.balance-item.settled{background:var(--bg-secondary);border-color:var(--border)}.balance-name{font-size:13px;font-weight:600}.balance-value{font-size:13px;font-weight:600;color:var(--text-secondary)}.balance-item.positive .balance-value{color:var(--success)}.balance-item.negative .balance-value{color:var(--error)}.settlements-list{display:flex;flex-direction:column;gap:8px}.settlement-item{display:flex;align-items:center;gap:8px;padding:12px;background:var(--success-light);border-radius:var(--radius);border:1px solid #86efac;font-size:13px;font-weight:500}.settlement-item span:first-child{font-weight:600}.settlement-item span:nth-child(3){font-weight:600}.arrow{color:var(--text-tertiary);font-size:16px}.settlement-item strong{margin-left:auto;color:var(--success)}.expenses-list{display:flex;flex-direction:column;gap:8px}.expense-item{display:flex;align-items:center;gap:12px;padding:12px;background:var(--bg-secondary);border-radius:var(--radius);border:1px solid var(--border);transition:var(--transition)}.expense-item:hover{background:var(--bg-tertiary);border-color:var(--accent)}.expense-emoji{font-size:24px}.expense-details{flex:1;display:flex;flex-direction:column;gap:2px}.expense-desc{font-size:13px;font-weight:600;color:var(--text-primary)}.expense-meta{font-size:12px;color:var(--text-tertiary)}.expense-amount{font-size:14px;font-weight:700;color:var(--accent)}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-2px)}75%{transform:translate(2px)}}@media (max-width: 1024px){.dashboard-grid{grid-template-columns:1fr}.sidebar{order:-1}.top-section{grid-template-columns:1fr}}@media (max-width: 768px){.app-header{padding:0 16px;height:60px;flex-wrap:wrap}.header-user{width:100%;justify-content:space-between;order:2;gap:12px}.main-content{padding:16px}.dashboard-grid{gap:16px}.card{padding:16px}.card.compact{padding:12px}.auth-card{padding:24px}.form-row,.top-section{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr 1fr}.empty-card{padding:40px 20px}.header-brand{width:100%;order:1}.header-brand h1{font-size:18px}.user-badge{gap:8px;padding:6px 8px}.user-email{display:none}.logout-button{font-size:12px;padding:6px 10px}}@media (max-width: 480px){.app-header{height:auto;flex-direction:column;gap:8px;padding:12px}.header-brand h1{font-size:16px}.header-user{width:100%;order:2}.main-content,.card{padding:12px}.card-title{font-size:14px}.dashboard-grid{grid-template-columns:1fr}.form-inline{flex-direction:column}.participants-section{padding:8px}.participant-item input[type=number]{width:100%}.settlement-item{flex-direction:column;align-items:flex-start;gap:4px}.settlement-item strong{width:100%;text-align:right;margin-left:0;margin-top:4px}.auth-card{padding:20px}.auth-header h1{font-size:24px}.form-field input{font-size:16px}}