:root{
  --bg:#f4f6f9; --panel:#fff; --ink:#1f2733; --muted:#7b8794; --line:#e3e8ef;
  --brand:#2f6fed; --brand-d:#1f52c0; --neg:#d1435b;
  --paid-bg:#fff9db; --paid:#ffe14d; --paid-ink:#7a5c00;
  --sent-bg:#e4f7ec; --sent:#3fbf6f; --sent-ink:#0f6b39; --unpaid-bg:#f1f4f8;
  --shadow:0 1px 3px rgba(18,30,50,.08),0 1px 2px rgba(18,30,50,.04);
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.45}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.muted{color:var(--muted)}
.small{font-size:12px}
.num{text-align:right;font-variant-numeric:tabular-nums}

.topbar{display:flex;align-items:center;justify-content:space-between;background:var(--panel);border-bottom:1px solid var(--line);padding:0 20px;height:56px;position:sticky;top:0;z-index:20}
.brand{font-weight:700;font-size:18px}
.topbar nav{display:flex;gap:6px;align-items:center}
.topbar nav a{padding:8px 14px;border-radius:8px;color:var(--ink);font-weight:600;font-size:14px}
.topbar nav a:hover{background:var(--bg);text-decoration:none}
.topbar nav a.active{background:var(--brand);color:#fff}
.topbar nav a.logout{color:var(--muted);font-weight:500}

.wrap{max-width:1150px;margin:0 auto;padding:22px 20px 40px}
.page-head{display:flex;align-items:center;justify-content:space-between;margin:4px 0 18px;flex-wrap:wrap;gap:10px}
.page-head h1{font-size:22px;margin:0}
.filters{display:flex;gap:14px;flex-wrap:wrap}
.filters label{font-size:13px;color:var(--muted)}
.filters select{margin-left:4px;padding:6px 8px;border:1px solid var(--line);border-radius:8px;background:#fff}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(165px,1fr));gap:14px;margin-bottom:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;box-shadow:var(--shadow)}
.card.highlight{border-color:var(--brand);box-shadow:0 0 0 1px var(--brand) inset}
.card-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;font-weight:700}
.card-value{font-size:24px;font-weight:700;margin:6px 0 2px}
.card-sub{font-size:12px;color:var(--muted)}

.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px;box-shadow:var(--shadow);margin-bottom:18px}
.panel h2{font-size:16px;margin:0 0 12px}
.two-col{display:flex;gap:18px;flex-wrap:wrap}
.two-col .panel{flex:1;min-width:280px}

.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th,.tbl td{padding:8px 9px;border-bottom:1px solid var(--line);text-align:left}
.tbl thead th{font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}

.expense-form{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.expense-form input,.expense-form select{padding:8px 9px;border:1px solid var(--line);border-radius:8px;font-size:14px}
.expense-form input[name=vendor]{min-width:140px;flex:1}
.expense-form input[name=amount]{width:100px}
.expense-form input[name=notes]{min-width:130px;flex:1}
.expense-form input[name=new_category]{width:130px}
.expense-form input[name=payment_method]{width:110px}
.expense-form .chk{display:flex;align-items:center;gap:5px;font-size:13px;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff;border:none;border-radius:8px;padding:9px 18px;font-weight:700;cursor:pointer}
.btn-primary:hover{background:var(--brand-d)}
.btn-plain{padding:9px 12px;color:var(--muted)}
.edit-row{background:#f7fafe}

.expenses-table .row-actions{display:flex;gap:8px;align-items:center;justify-content:flex-end}
.edit-link{font-size:13px;font-weight:600}
.inline-del{margin:0}
.btn-del{background:none;border:none;color:var(--neg);cursor:pointer;font-size:14px;font-weight:700;opacity:.6}
.btn-del:hover{opacity:1}
.mini-badge{border:1px solid var(--line);border-radius:999px;padding:3px 9px;font-size:11px;font-weight:700;white-space:nowrap}
.mb-yes{background:var(--sent-bg);color:var(--sent-ink);border-color:var(--sent)}
.mb-no{background:var(--unpaid-bg);color:#5b6672}

.catbar-label{font-size:13px;margin-bottom:3px}
.catbar{height:8px;background:var(--unpaid-bg);border-radius:5px;overflow:hidden;border:1px solid var(--line)}
.catbar-fill{height:100%;background:linear-gradient(90deg,var(--brand),#6f9bff)}

.table-scroll{overflow-x:auto}
.matrix{font-size:13px;min-width:820px}
.matrix th,.matrix td{padding:7px 9px;white-space:nowrap}
.matrix th.stick,.matrix td.stick{position:sticky;left:0;background:var(--panel);text-align:left;font-weight:600;z-index:1;box-shadow:1px 0 0 var(--line)}
.matrix thead th.stick{background:#fafbfc}
.matrix .total-col{border-left:2px solid var(--line);font-weight:700}
.matrix th.cur,.matrix td.cur{background:var(--paid-bg)}
.matrix .z{color:var(--muted);opacity:.5}
.matrix tfoot td{border-top:2px solid var(--line);font-weight:700;background:#fafbfc}
.matrix a{color:var(--ink)}
.matrix a.cellval{color:var(--brand);font-weight:600}

.foot{max-width:1150px;margin:0 auto;padding:0 20px 30px;font-size:12px}

.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh}
.login-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:30px;width:320px;box-shadow:var(--shadow);text-align:center}
.login-card h1{margin:0 0 4px}
.login-card input{width:100%;padding:11px;border:1px solid var(--line);border-radius:9px;margin:12px 0;font-size:15px}
.login-card button{width:100%;padding:11px;background:var(--brand);color:#fff;border:none;border-radius:9px;font-weight:700;cursor:pointer}
.login-card button:hover{background:var(--brand-d)}
.alert{background:#fdecef;color:var(--neg);border:1px solid #f6c7d0;border-radius:8px;padding:8px;font-size:13px}

@media(max-width:720px){ .expense-form input[name=vendor]{width:100%} }

/* insights additions */
.tips{margin:0;padding-left:20px}
.tips li{margin:6px 0;line-height:1.5}

/* breakdown panel toggle (Category / Vendor) */
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.toggle{display:inline-flex;align-items:center;gap:8px}
.toggle a{padding:2px 4px;font-size:17px;color:var(--muted);text-decoration:none;background:transparent;border-radius:6px}
.toggle a.on{color:var(--brand);font-weight:700}
.toggle a:hover:not(.on){color:#111}
.toggle-sep{font-size:17px;color:#000;user-select:none;-webkit-user-select:none;cursor:default}

/* expandable breakdown (category / vendor -> transactions) */
.breakdown{display:flex;flex-direction:column;gap:2px}
.bd-item{border-bottom:1px solid var(--line)}
.bd-item>summary{cursor:pointer;padding:8px 4px 8px 2px;border-radius:6px}
.bd-item>summary:hover{background:rgba(0,0,0,.03)}
.bd-item>summary .bd-row{display:inline-flex;align-items:center;gap:10px;width:calc(100% - 22px);vertical-align:middle}
.bd-main{flex:1;min-width:0}
.bd-amt{flex:0 0 auto;font-weight:600}
.bd-body{padding:2px 4px 10px 26px}
.bd-tx{margin:0}
.bd-tx td{padding:4px 8px;border:none;border-top:1px solid var(--line)}
.bd-tx tr:first-child td{border-top:none}
.nowrap{white-space:nowrap}

/* find-by-amount lookup */
.lookup-head{display:flex;align-items:center;gap:12px;flex-wrap:nowrap;margin:18px 0 8px}
.lookup-head h2{white-space:nowrap;font-size:20px;margin:0}
.lookup-form{display:flex;gap:8px;align-items:center;flex-wrap:nowrap;margin:0}
.lookup-form input[type=number]{width:100px;padding:5px 10px;border:1px solid var(--line);border-radius:8px;font-size:15px;line-height:1.2}
.lookup-form .btn-primary{white-space:nowrap}
.lookup-results{margin-top:6px}
.lookup-results tbody tr:hover{background:rgba(0,0,0,.03)}