/* ===================== Design tokens ===================== */
:root{
  --bg:#f4f6fb;
  --surface:#ffffff;
  --surface-2:#f8f9fc;
  --border:#e6e9f2;
  --text:#1c2130;
  --text-muted:#6b7285;
  --primary:#4f46e5;
  --primary-dark:#4338ca;
  --primary-light:#eef0ff;
  --income:#0f9d58;
  --income-light:#e7f8ee;
  --expense:#e0344c;
  --expense-light:#fdeaed;
  --warn:#d97706;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 1px 2px rgba(16,24,40,.04), 0 1px 3px rgba(16,24,40,.06);
  --shadow-md:0 4px 12px rgba(16,24,40,.08);
  --sidebar-w:240px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:14.5px;
  line-height:1.5;
}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0 0 4px}
button{font-family:inherit}

/* ===================== Shell layout ===================== */
.app-shell{display:flex;min-height:100vh}

.sidebar{
  width:var(--sidebar-w);
  background:#181b2e;
  color:#c7cbe0;
  display:flex;
  flex-direction:column;
  padding:20px 14px;
  position:fixed;
  top:0;bottom:0;left:0;
  z-index:40;
}
.sidebar-brand{display:flex;align-items:center;gap:10px;padding:6px 10px 22px}
.brand-mark{
  width:34px;height:34px;border-radius:9px;background:var(--primary);
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px;
}
.brand-text{color:#fff;font-weight:700;font-size:16px}
.sidebar-nav{display:flex;flex-direction:column;gap:2px;flex:1}
.sidebar-nav a{
  display:flex;align-items:center;gap:12px;
  padding:10px 12px;border-radius:var(--radius-sm);
  color:#c7cbe0;font-weight:500;font-size:14px;
}
.sidebar-nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.sidebar-nav a.active{background:var(--primary);color:#fff}
.nav-icon{font-size:16px;width:18px;text-align:center}
.sidebar-add-btn{margin-top:10px}
.sidebar-user{
  margin-top:14px;padding:12px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.05);display:flex;flex-direction:column;gap:6px;
}
.sidebar-user-name{color:#e2e4f3;font-size:12.5px;font-weight:600}
.sidebar-logout{color:#9aa0c4;font-size:12px;font-weight:600}
.sidebar-logout:hover{color:#fff;text-decoration:underline}

.main-col{margin-left:var(--sidebar-w);flex:1;min-width:0;display:flex;flex-direction:column}

.topbar{
  display:flex;align-items:center;gap:14px;
  padding:14px 26px;background:var(--surface);
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:20;
}
.topbar-title{font-size:19px;font-weight:700;flex:1}
.hamburger{display:none;background:none;border:none;font-size:20px;cursor:pointer;color:var(--text)}

.content{padding:24px 26px 60px;max-width:1300px;width:100%;margin:0 auto}

/* ===================== Buttons ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 16px;border-radius:var(--radius-sm);border:1px solid transparent;
  font-size:13.5px;font-weight:600;cursor:pointer;transition:.15s ease;white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:var(--surface);color:var(--text);border-color:var(--border)}
.btn-secondary:hover{background:var(--surface-2)}
.btn-danger{background:var(--expense-light);color:var(--expense)}
.btn-danger:hover{background:#fbd7dc}
.btn-ghost{background:transparent;color:var(--text-muted);border-color:var(--border)}
.btn-sm{padding:6px 11px;font-size:12.5px}
.btn-block{width:100%}
.btn:disabled{opacity:.6;cursor:not-allowed}
.btn-icon{padding:7px 9px}

/* ===================== Cards ===================== */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-pad{padding:20px}
.card-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border);gap:12px;flex-wrap:wrap}
.card-head h3{font-size:15px}
.card-body{padding:20px}

.grid{display:grid;gap:18px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:1100px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}}

.stat-card{padding:18px 20px;display:flex;flex-direction:column;gap:8px}
.stat-label{font-size:12.5px;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.03em}
.stat-value{font-size:24px;font-weight:800}
.stat-sub{font-size:12.5px;color:var(--text-muted)}
.stat-value.income{color:var(--income)}
.stat-value.expense{color:var(--expense)}
.stat-icon{font-size:20px}

.person-chip{
  display:inline-flex;align-items:center;gap:6px;padding:3px 10px 3px 6px;
  border-radius:999px;font-size:12px;font-weight:700;
}
.person-dot{width:8px;height:8px;border-radius:50%;display:inline-block}

/* ===================== Tables ===================== */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--border);white-space:nowrap}
th{color:var(--text-muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.02em;background:var(--surface-2)}
tbody tr:hover{background:var(--surface-2)}
td.wrap{white-space:normal}
.amount-income{color:var(--income);font-weight:700}
.amount-expense{color:var(--expense);font-weight:700}
.balance-col{font-weight:700}
.text-muted{color:var(--text-muted)}
.text-right{text-align:right}
.text-center{text-align:center}

.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:999px;font-size:11.5px;font-weight:700}
.badge-income{background:var(--income-light);color:var(--income)}
.badge-expense{background:var(--expense-light);color:var(--expense)}
.badge-bank{background:var(--primary-light);color:var(--primary)}
.badge-cash{background:#fff4e0;color:var(--warn)}

.bill-thumb{width:34px;height:34px;border-radius:6px;object-fit:cover;border:1px solid var(--border);cursor:pointer}

/* ===================== Forms ===================== */
.form-group{margin-bottom:16px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:560px){.form-row{grid-template-columns:1fr}}
label{display:block;font-size:12.5px;font-weight:700;color:var(--text-muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.02em}
input[type=text],input[type=number],input[type=date],input[type=datetime-local],input[type=search],input[type=file],select,textarea{
  width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);
  font-size:14px;background:var(--surface);color:var(--text);
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.type-toggle{display:flex;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--border)}
.type-toggle label{
  flex:1;text-align:center;padding:11px;margin:0;cursor:pointer;font-weight:700;font-size:13px;
  text-transform:none;letter-spacing:0;color:var(--text-muted);background:var(--surface);
}
.type-toggle input{display:none}
.type-toggle input:checked + label.for-income{background:var(--income-light);color:var(--income)}
.type-toggle input:checked + label.for-expense{background:var(--expense-light);color:var(--expense)}
.field-error{color:var(--expense);font-size:12px;margin-top:4px;display:none}
.help-text{color:var(--text-muted);font-size:12px;margin-top:5px}

.filter-bar{display:flex;flex-wrap:wrap;gap:12px;align-items:end;padding:16px 20px;background:var(--surface-2);border-bottom:1px solid var(--border)}
.filter-bar .form-group{margin-bottom:0;min-width:150px}

/* ===================== Modal ===================== */
.modal-backdrop{
  position:fixed;inset:0;background:rgba(15,18,30,.55);
  display:flex;align-items:flex-start;justify-content:center;
  z-index:100;padding:40px 16px;overflow-y:auto;
}
.modal-backdrop[hidden]{display:none}
.modal{background:var(--surface);border-radius:var(--radius);width:100%;max-width:640px;position:relative;box-shadow:var(--shadow-md);animation:pop .15s ease}
@keyframes pop{from{transform:scale(.97);opacity:0}to{transform:scale(1);opacity:1}}
.modal-close{position:absolute;top:14px;right:16px;background:none;border:none;font-size:22px;cursor:pointer;color:var(--text-muted);z-index:2}
.modal-body{padding:26px}
.modal-loading{display:flex;justify-content:center;padding:60px}

/* ===================== Loader / Toast ===================== */
.loader-overlay{position:fixed;inset:0;background:rgba(255,255,255,.6);z-index:200;display:flex;align-items:center;justify-content:center}
.loader-overlay[hidden]{display:none}
.spinner{width:34px;height:34px;border:3px solid var(--primary-light);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.btn .spinner{width:15px;height:15px;border-width:2px;margin-right:2px}

.toast-container{position:fixed;top:20px;right:20px;z-index:300;display:flex;flex-direction:column;gap:10px}
.toast{
  background:var(--text);color:#fff;padding:12px 16px;border-radius:var(--radius-sm);
  font-size:13.5px;box-shadow:var(--shadow-md);min-width:220px;
  animation:slideIn .2s ease;display:flex;align-items:center;gap:8px;
}
.toast.success{background:#0f9d58}
.toast.error{background:var(--expense)}
@keyframes slideIn{from{transform:translateX(30px);opacity:0}to{transform:translateX(0);opacity:1}}

/* ===================== Misc ===================== */
.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}
.empty-state .icon{font-size:38px;margin-bottom:10px}
.section-title{font-size:14px;font-weight:700;margin:26px 0 12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.03em}
.pagination{display:flex;gap:6px;justify-content:center;padding:18px}
.pagination a,.pagination span{padding:7px 12px;border-radius:var(--radius-sm);border:1px solid var(--border);font-size:13px}
.pagination .current{background:var(--primary);color:#fff;border-color:var(--primary)}

.account-card{padding:18px;display:flex;flex-direction:column;gap:10px}
.account-card .top{display:flex;justify-content:space-between;align-items:flex-start}
.account-card .balance{font-size:22px;font-weight:800}
.account-card .name{font-weight:700;font-size:14.5px}

@media(max-width:900px){
  .sidebar{transform:translateX(-100%);transition:transform .2s ease;box-shadow:var(--shadow-md)}
  .sidebar.open{transform:translateX(0)}
  .main-col{margin-left:0}
  .hamburger{display:block}
  #openAddTxnBtnTop{display:none}
}
@media(min-width:901px){
  .sidebar-add-btn{display:none}
}