/* Personal expense app — modern clean theme */
:root {
  --bg: #eef2f7;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --accent-soft: #eff6ff;
  --green: #15803d;
  --green-soft: #f0fdf4;
  --red: #dc2626;
  --red-soft: #fef2f2;
  --header: #0b1220;
  --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 4px 16px rgba(15, 23, 42, .05);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans Myanmar", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}
/* ---------- header + nav ---------- */
header {
  background: var(--header);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 12px rgba(0, 0, 0, .25);
}
.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand { font-size: 20px; font-weight: 800; white-space: nowrap; letter-spacing: -.2px; }
nav { display: flex; gap: 6px; align-items: center; }
nav a {
  color: #cbd5e1;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: background .15s, color .15s;
}
nav a:hover { background: rgba(255, 255, 255, .1); color: #fff; }
nav a.active { background: var(--accent); color: #fff; box-shadow: 0 2px 8px rgba(37, 99, 235, .45); }
.logout-form { display: inline; margin: 0; }
.logout-form button {
  background: none;
  border: 1px solid rgba(252, 165, 165, .4);
  color: #fca5a5;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  padding: 7px 13px;
  border-radius: 999px;
}
.logout-form button:hover { background: rgba(220, 38, 38, .18); }
/* ---------- layout ---------- */
main { max-width: 900px; margin: 0 auto; padding: 20px 16px 32px; }
h2 { font-size: 24px; margin: 8px 0 18px; letter-spacing: -.3px; }
h3 { font-size: 17px; margin: 26px 0 10px; }
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 0 16px 28px; }
.alert { padding: 12px 16px; border-radius: 12px; margin: 0 0 16px; font-weight: 600; }
.alert-ok { background: var(--green-soft); color: #166534; border-left: 4px solid var(--green); }
.alert-err { background: var(--red-soft); color: #991b1b; border-left: 4px solid var(--red); }
/* ---------- summary cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 16px 0 8px; }
.card { border-radius: 16px; padding: 18px; box-shadow: var(--shadow); }
.card span { display: block; color: var(--muted); font-size: 14px; font-weight: 600; }
.card strong { font-size: 26px; letter-spacing: -.5px; }
.card.income { background: var(--green-soft); }
.card.income strong { color: var(--green); }
.card.expense { background: var(--red-soft); }
.card.expense strong { color: var(--red); }
.card.balance { background: var(--accent-soft); }
.card.balance strong { color: var(--accent-dark); }
.pos { color: var(--green); }
.neg { color: var(--red); }
/* ---------- tables ---------- */
.tablewrap { overflow-x: auto; background: var(--card); border-radius: 16px; box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 11px 14px; border-bottom: 1px solid var(--line); text-align: left; }
th { background: #f8fafc; color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .4px; }
tbody tr:hover td, tr:hover td { background: #f8fafc; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.num { font-weight: 700; }
.pill {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  padding: 3px 11px;
  border-radius: 999px;
  white-space: nowrap;
}
.pill-income { background: var(--green-soft); color: var(--green); }
.pill-expense { background: var(--red-soft); color: var(--red); }
/* ---------- forms ---------- */
.form { background: var(--card); border-radius: 16px; padding: 20px; box-shadow: var(--shadow); max-width: 520px; }
.form label { display: block; margin-bottom: 14px; font-weight: 700; font-size: 15px; }
.form input[type="text"], .form input[type="password"], .form input[type="number"],
.form input[type="date"], .form select {
  width: 100%;
  padding: 11px 13px;
  margin-top: 6px;
  border: 1.5px solid #cbd5e1;
  border-radius: 12px;
  font-size: 16px;
  background: #fff;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.form input:focus, .form select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
}
.radios label { display: inline-block; font-weight: 600; margin-right: 18px; }
.radios input { accent-color: var(--accent); transform: scale(1.2); margin-right: 6px; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 11px 20px;
  border-radius: 11px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(37, 99, 235, .3);
  transition: background .15s, transform .1s;
}
.btn:hover { background: var(--accent-dark); }
.btn:active { transform: scale(.98); }
.btn-small { padding: 8px 14px; font-size: 14px; border-radius: 10px; }
/* ---------- filter bars ---------- */
.monthnav, .filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 18px;
  background: var(--card);
  padding: 12px;
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.monthnav input[type="month"], .filters input, .filters select {
  padding: 9px 11px;
  border: 1.5px solid #cbd5e1;
  border-radius: 10px;
  font-size: 15px;
  background: #fff;
  outline: none;
}
.monthnav input[type="month"]:focus, .filters input:focus, .filters select:focus { border-color: var(--accent); }
.inline { display: inline; }
.link-btn { background: none; border: none; color: var(--red); cursor: pointer; font-size: 15px; font-weight: 600; padding: 0; }
a { color: var(--accent-dark); }
.muted { color: var(--muted); font-size: 14px; }
/* ---------- mobile ---------- */
@media (max-width: 720px) {
  .header-inner { flex-direction: column; align-items: stretch; padding: 12px 12px 10px; }
  .brand { text-align: center; }
  nav { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 2px; scrollbar-width: none; }
  nav::-webkit-scrollbar { display: none; }
  .cards { grid-template-columns: 1fr; }
  .card strong { font-size: 23px; }
  main { padding-top: 14px; }
}

/* ---------- new features: dark mode, budgets, chart, pager ---------- */
.theme-btn { background: rgba(255, 255, 255, .1); border: none; color: #fff; font-size: 17px; cursor: pointer; padding: 7px 11px; border-radius: 999px; }
.theme-btn:hover { background: rgba(255, 255, 255, .2); }
.insights { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 16px 0; }
.insights > div { background: var(--card); border-radius: 16px; padding: 16px; box-shadow: var(--shadow); }
.insights span { display: block; color: var(--muted); font-size: 13px; font-weight: 600; }
.insights strong { font-size: 16px; }
.budget-box { background: var(--card); border-radius: 16px; padding: 16px; box-shadow: var(--shadow); }
.budget-row { margin-bottom: 14px; }
.budget-row:last-child { margin-bottom: 0; }
.budget-head { display: flex; justify-content: space-between; gap: 8px; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.progress { height: 12px; background: #e2e8f0; border-radius: 999px; overflow: hidden; }
.progress-fill { height: 100%; border-radius: 999px; }
.bar-ok { background: #22c55e; }
.bar-warn { background: #f59e0b; }
.bar-over { background: #ef4444; }
.chart { display: flex; align-items: flex-end; gap: 10px; background: var(--card); border-radius: 16px; padding: 20px 16px 12px; box-shadow: var(--shadow); }
.chart-group { flex: 1; display: flex; flex-direction: column; align-items: center; }
.chart-bars { display: flex; align-items: flex-end; gap: 6px; height: 150px; }
.chart-bar { width: 26px; border-radius: 6px 6px 0 0; }
.bar-income { background: #22c55e; }
.bar-expense { background: #ef4444; }
.chart-label { margin-top: 8px; font-size: 13px; color: var(--muted); }
.pager { display: flex; gap: 12px; align-items: center; margin-top: 16px; flex-wrap: wrap; }
.mini-input { width: 130px; padding: 8px 10px; border: 1.5px solid #cbd5e1; border-radius: 10px; font-size: 15px; background: #fff; }
.inline-form { display: inline; }
.btn-danger { background: #dc2626; box-shadow: 0 2px 8px rgba(220, 38, 38, .3); }
.btn-danger:hover { background: #b91c1c; }
.btn-active { outline: 2px solid var(--accent); }
.inline-check { display: inline-block; font-weight: 600; margin-left: 12px; }
/* ---------- dark theme ---------- */
[data-theme="dark"] {
  --bg: #0f172a;
  --card: #1e293b;
  --ink: #f1f5f9;
  --muted: #94a3b8;
  --line: #334155;
  --accent-soft: #1e3a5f;
  --green-soft: #14532d;
  --red-soft: #450a0a;
  --shadow: 0 1px 3px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .2);
}
[data-theme="dark"] th { background: #16213a; }
[data-theme="dark"] tr:hover td { background: #263449; }
[data-theme="dark"] .form input[type="text"], [data-theme="dark"] .form input[type="password"],
[data-theme="dark"] .form input[type="number"], [data-theme="dark"] .form input[type="date"],
[data-theme="dark"] .form select, [data-theme="dark"] .filters input, [data-theme="dark"] .filters select,
[data-theme="dark"] .monthnav input[type="month"], [data-theme="dark"] .mini-input {
  background: #0f172a; border-color: #334155; color: var(--ink);
}
[data-theme="dark"] .card.balance strong { color: #93c5fd; }
[data-theme="dark"] .alert-ok { background: #14532d; color: #bbf7d0; }
[data-theme="dark"] .alert-err { background: #450a0a; color: #fecaca; }
[data-theme="dark"] .progress { background: #334155; }
@media (max-width: 720px) {
  .insights { grid-template-columns: 1fr; }
  .chart-bar { width: 18px; }
}

/* ---------- responsive: tables become cards on phones ---------- */
.date-label { display: flex; align-items: center; gap: 6px; font-weight: 600; font-size: 14px; }
@media (max-width: 720px) {
  main { padding: 14px 12px 28px; }
  .tablewrap { background: transparent; box-shadow: none; overflow: visible; }
  .tablewrap table, .tablewrap tbody { display: block; width: 100%; }
  .tablewrap table tr:first-child { display: none; }
  .tablewrap table tr { display: block; background: var(--card); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); margin-bottom: 10px; }
  .tablewrap table td { display: flex; justify-content: space-between; align-items: center; gap: 12px; border-bottom: 1px solid var(--line); padding: 10px 14px; text-align: right; }
  .tablewrap table td:last-child { border-bottom: none; }
  .tablewrap table td::before { content: attr(data-label); font-weight: 700; color: var(--muted); font-size: 13px; text-align: left; flex-shrink: 0; }
  .tablewrap table td form { display: flex; flex-wrap: wrap; gap: 6px; justify-content: flex-end; }
  .filters > * { flex: 1 1 100%; }
  .filters .btn { text-align: center; }
  .date-label input { flex: 1; min-width: 0; }
  .monthnav { flex-wrap: nowrap; }
  .monthnav input[type="month"] { flex: 1; min-width: 0; }
  .monthnav .btn { padding: 7px 9px; font-size: 13px; }
  nav a { padding: 7px 11px; font-size: 14px; }
  .budget-head { flex-wrap: wrap; }
  .chart { gap: 6px; padding: 16px 10px 10px; }
}

/* ---------- burger nav (mobile) + even-height buttons ---------- */
.burger { display: none; background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .25); color: #fff; font-size: 20px; cursor: pointer; padding: 6px 12px; border-radius: 10px; }
.btn { white-space: nowrap; }
.monthnav { align-items: stretch; }
.monthnav .btn { display: inline-flex; align-items: center; justify-content: center; white-space: nowrap; }
@media (max-width: 720px) {
  .header-inner { flex-direction: row; flex-wrap: wrap; align-items: center; }
  .brand { text-align: left; flex: 1; }
  .burger { display: block; }
  nav { display: none; width: 100%; flex-direction: column; order: 3; overflow: visible; }
  nav.open { display: flex; }
  nav a { width: 100%; padding: 12px 14px; }
  nav .theme-btn { width: 100%; text-align: left; background: transparent; padding: 12px 14px; font-size: 15px; font-weight: 600; }
  nav .logout-form { width: 100%; }
  nav .logout-form button { width: 100%; text-align: left; border: none; padding: 12px 14px; font-size: 15px; }
  .nav-month { display: none; }
}

/* ---------- page title row with right-end action ---------- */
.page-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin: 8px 0 18px; }
.page-head h2 { margin: 0; }
.page-actions { margin-left: auto; display: flex; gap: 8px; }

/* spacing after forms (e.g. add-category form above its table) */
.form { margin-bottom: 24px; }

/* Font Awesome icon spacing (icon before label) */
.fa-solid, .fa-regular { margin-right: 6px; }