*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:#F3F4F6;color:#1F2937;line-height:1.5;min-height:100vh;overflow-x:hidden}
input,select,button,textarea{font-family:inherit;font-size:inherit}
a{text-decoration:none;color:inherit}

/* SCREENS */
.screen-center{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
.card{background:#fff;border-radius:16px;padding:24px;box-shadow:0 1px 3px rgba(0,0,0,.1)}
.logo{font-size:28px;font-weight:800;text-align:center;margin-bottom:4px;color:#1E40AF}
.subtitle{text-align:center;color:#6B7280;margin-bottom:24px;font-size:15px}
.msg{color:#059669;text-align:center;font-size:14px;margin-bottom:12px;font-weight:500}
.error{color:#DC2626;text-align:center;font-size:14px;margin-bottom:12px}

/* FORM */
.field{margin-bottom:14px}
.field label{display:block;font-size:14px;font-weight:600;color:#374151;margin-bottom:4px}
.field input,.field select{width:100%;padding:12px 14px;border:1px solid #D1D5DB;border-radius:10px;font-size:16px;background:#fff;color:#1F2937;transition:border-color .15s}
.field input:focus,.field select:focus{outline:none;border-color:#1E40AF;box-shadow:0 0 0 3px rgba(30,64,175,.15)}

.btn{display:inline-block;padding:12px 20px;border:none;border-radius:10px;font-size:16px;font-weight:600;cursor:pointer;background:#E5E7EB;color:#374151;text-align:center;transition:opacity .15s}
.btn:hover{opacity:.85}
.btn-primary{background:#1E40AF;color:#fff}
.btn-danger{background:#DC2626;color:#fff}
.btn-sm{padding:8px 14px;font-size:14px}
.btn-logout{background:none;border:none;color:#BFDBFE;font-size:14px;cursor:pointer;font-weight:500}

/* APP LAYOUT */
.app{display:flex;flex-direction:column;min-height:100vh;max-width:600px;margin:0 auto}
.topbar{background:#1E40AF;color:#fff;padding:12px 16px;display:flex;align-items:center;gap:10px;position:sticky;top:0;z-index:10}
.topbar-title{font-size:18px;font-weight:700;flex:1}
.role-badge{padding:2px 10px;border-radius:12px;font-size:12px;font-weight:600}
.role-badge.admin{background:#FEF3C7;color:#D97706}
.role-badge.viewer{background:#DBEAFE;color:#1D4ED8}

.content{flex:1;padding:12px;padding-bottom:80px;overflow-y:auto}
.tab-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.tab-header h2{font-size:20px;font-weight:700}

/* TABS (bottom nav) */
.tabs{position:fixed;bottom:0;left:0;right:0;background:#fff;display:flex;border-top:1px solid #E5E7EB;z-index:20;max-width:600px;margin:0 auto}
.tab{flex:1;display:flex;flex-direction:column;align-items:center;padding:8px 4px 6px;color:#9CA3AF;font-size:11px;transition:color .15s}
.tab.active{color:#1E40AF}
.tab-icon{font-size:22px;margin-bottom:2px}
.tab-label{font-weight:500}

/* BALANCE CARD */
.balance-card{background:linear-gradient(135deg,#1E40AF,#2563EB);color:#fff;padding:20px;border-radius:16px;margin-bottom:12px}
.balance-label{font-size:14px;color:#BFDBFE}
.balance-amount{font-size:36px;font-weight:800;margin:4px 0 12px}
.balance-stats{display:flex;justify-content:space-between;font-size:13px;color:#BFDBFE}

/* SUMMARY ROW */
.summary-row{display:flex;gap:8px;margin-bottom:12px}
.summary-item{flex:1;background:#fff;border-radius:12px;padding:12px;text-align:center;box-shadow:0 1px 2px rgba(0,0,0,.05)}
.summary-label{display:block;font-size:12px;color:#6B7280;margin-bottom:4px}
.summary-val{font-size:18px;font-weight:700;color:#1F2937;display:block}

/* TRANSACTION ROW */
.txn-row{display:flex;align-items:center;background:#fff;padding:12px;border-radius:10px;margin-bottom:4px;gap:10px}
.txn-arrow{font-size:20px;width:28px;text-align:center}
.txn-info{flex:1;min-width:0}
.txn-info strong{display:block;font-size:15px}
.txn-desc{font-size:13px;color:#6B7280;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.txn-date{font-size:12px;color:#9CA3AF}
.txn-right{text-align:right;flex-shrink:0}
.txn-bal{font-size:12px;color:#9CA3AF;display:block}

/* CARDS */
.card{background:#fff;border-radius:12px;padding:14px;margin-bottom:8px;box-shadow:0 1px 2px rgba(0,0,0,.05)}
.card-hdr{display:flex;justify-content:space-between;margin-bottom:6px}
.card-date{font-size:13px;color:#6B7280}
.card-amount{font-size:24px;font-weight:700;margin-bottom:2px}
.card-desc{color:#6B7280;font-size:14px;margin-bottom:6px}
.card-ftr{display:flex;justify-content:space-between;font-size:13px;color:#9CA3AF;margin-top:6px}

/* PROGRESS BAR */
.progress{height:6px;background:#E5E7EB;border-radius:3px;overflow:hidden;margin:8px 0}
.progress-fill{height:100%;background:#1E40AF;border-radius:3px;transition:width .3s}

/* BADGES */
.badge{display:inline-block;padding:2px 8px;border-radius:8px;font-size:12px;font-weight:600}
.badge.outstanding{background:#FEF3C7;color:#D97706}
.badge.settled{background:#D1FAE5;color:#059669}

/* FILTER ROW */
.filter-row{display:flex;gap:6px;margin-bottom:12px;flex-wrap:wrap}
.filter-btn{padding:6px 14px;border-radius:20px;background:#fff;border:1px solid #D1D5DB;font-size:14px;font-weight:500;color:#6B7280}
.filter-btn.active{background:#1E40AF;border-color:#1E40AF;color:#fff}

/* EXPENSE CARD */
.exp-card{display:flex;justify-content:space-between;align-items:flex-start;background:#fff;padding:12px;border-radius:10px;margin-bottom:4px;gap:8px}
.exp-left{display:flex;gap:10px;flex:1;min-width:0}
.exp-icon{font-size:24px}
.exp-info{flex:1;min-width:0}
.exp-amt{display:block;font-size:16px}
.exp-desc{font-size:13px;color:#6B7280;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.exp-vendor{font-size:12px;color:#9CA3AF}
.exp-right{text-align:right;flex-shrink:0}
.paid-badge{display:inline-block;padding:2px 8px;border-radius:8px;font-size:11px;font-weight:600;margin-bottom:2px}
.exp-date{display:block;font-size:12px;color:#9CA3AF}
.receipt-link{font-size:18px}

/* ADVANCE EXPENSES */
.adv-expenses{margin-top:10px;padding-top:8px;border-top:1px solid #E5E7EB}
.adv-exp-item{display:flex;justify-content:space-between;font-size:13px;padding:4px 0;color:#374151;gap:8px}
.adv-exp-item span:first-child{font-weight:600;white-space:nowrap}

/* BUDGET */
.budget-hdr{display:flex;align-items:center;gap:8px;margin-bottom:4px}
.cat-icon{font-size:20px}
.cat-name{font-size:15px;font-weight:600;flex:1}
.budget-amt{font-size:15px;font-weight:700}
.budget-form{display:flex;gap:6px;margin-top:8px}
.budget-form input{flex:1;padding:8px 10px;border:1px solid #D1D5DB;border-radius:8px;font-size:14px}

/* MODAL */
.modal-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:100;justify-content:center;align-items:center;padding:20px}
.modal-overlay.open{display:flex}
.modal{background:#fff;border-radius:16px;padding:24px;width:100%;max-width:420px;max-height:90vh;overflow-y:auto}
.modal h3{margin-bottom:16px;font-size:18px}

/* EMPTY STATE */
.empty{text-align:center;color:#9CA3AF;padding:40px 0;font-size:15px}

/* RESPONSIVE */
@media(min-width:600px){
    .app{max-width:600px;margin:0 auto;border-left:1px solid #E5E7EB;border-right:1px solid #E5E7EB}
    .tabs{max-width:600px;left:auto;right:auto;width:100%}
}