:root {
  --bg: #f7f4ef;
  --bg-card: #fffcf7;
  --ink: #2c2a26;
  --ink-soft: #6b6560;
  --line: #e6e0d6;
  --accent: #5b6b7a;
  --accent-soft: #dce3ea;
  --green: #3d6b55;
  --green-bg: #e8f2ec;
  --red: #8b4a42;
  --red-bg: #f5ebe9;
  --blue-muted: #6a7d8f;
  --shadow: 0 1px 3px rgba(44, 42, 38, 0.06);
  --radius: 12px;
  --font: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem 3rem; }

/* Nav */
.topbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.topbar-inner {
  max-width: 1080px; margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap;
}
.brand {
  font-family: var(--font);
  font-size: 1.15rem;
  color: var(--ink);
  letter-spacing: 0.04em;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.brand-logo {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}
.login-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.15rem;
}
.login-brand h1 { margin: 0; }
.brand:hover { text-decoration: none; opacity: 0.85; }
.nav { display: flex; gap: 0.85rem; flex-wrap: wrap; flex: 1; }
.nav a {
  color: var(--ink-soft);
  font-size: 0.92rem;
  padding: 0.2rem 0;
}
.nav a:hover, .nav a.active { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--accent); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 0.75rem; font-size: 0.85rem; color: var(--ink-soft); }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.4rem;
  margin-bottom: 1.1rem;
}
.card h2, .card h3 {
  font-family: var(--font);
  font-weight: 500;
  margin: 0 0 0.85rem;
  letter-spacing: 0.03em;
}
.page-title {
  font-family: var(--font);
  font-weight: 500;
  font-size: 1.45rem;
  margin: 1.5rem 0 1rem;
  letter-spacing: 0.04em;
}
.muted { color: var(--ink-soft); font-size: 0.9rem; }
.dot { color: var(--line); margin: 0 0.35rem; }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.1rem;
}
.stat {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow);
}
.stat .label { font-size: 0.82rem; color: var(--ink-soft); margin-bottom: 0.25rem; }
.stat .value { font-size: 1.45rem; font-family: var(--font); letter-spacing: 0.02em; }
.stat .value.income { color: var(--green); }
.stat .value.expense { color: var(--red); }
.stat .value.balance { color: var(--accent); }

/* Forms */
label { display: block; font-size: 0.85rem; color: var(--ink-soft); margin-bottom: 0.3rem; }
input[type=text], input[type=password], input[type=number], input[type=date],
input[type=file], select, textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-size: 0.95rem;
  font-family: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--blue-muted);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-row { margin-bottom: 0.9rem; }
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.85rem;
}
.btn {
  display: inline-block;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
  font-family: inherit;
}
.btn:hover { opacity: 0.92; text-decoration: none; }
.btn-ghost {
  background: transparent;
  color: var(--accent);
}
.btn-danger {
  background: transparent;
  border-color: var(--red);
  color: var(--red);
}
.btn-sm { padding: 0.25rem 0.65rem; font-size: 0.8rem; }
.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }

/* Table */
.table-wrap { overflow-x: auto; }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
table.data th, table.data td {
  text-align: left;
  padding: 0.55rem 0.5rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.data th { color: var(--ink-soft); font-weight: 500; font-size: 0.8rem; }
table.data tr:hover td { background: rgba(220, 227, 234, 0.25); }
.amount { font-variant-numeric: tabular-nums; white-space: nowrap; }
.amount.income { color: var(--green); }
.amount.expense { color: var(--red); }
.amount.transfer { color: var(--ink-soft); }
.badge {
  display: inline-block;
  font-size: 0.72rem;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}
.badge.income { background: var(--green-bg); color: var(--green); }
.badge.expense { background: var(--red-bg); color: var(--red); }
.badge.transfer { background: #eeeae4; color: var(--ink-soft); }

/* Flash */
.flash {
  padding: 0.7rem 1rem;
  border-radius: 8px;
  margin: 1rem 0;
  font-size: 0.92rem;
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid #c5ddd0;
}
.flash.err {
  background: var(--red-bg);
  color: var(--red);
  border-color: #e0c5c1;
}

/* Login */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow);
}
.login-card h1 {
  font-family: var(--font);
  font-weight: 500;
  font-size: 1.5rem;
  text-align: center;
  margin: 0 0 0.35rem;
  letter-spacing: 0.08em;
}
.login-card .sub {
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.88rem;
  margin-bottom: 1.5rem;
}

.filters {
  display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: end;
  margin-bottom: 1rem;
}
.filters .form-row { margin: 0; min-width: 120px; }

.help-list { padding-left: 1.2rem; }
.help-list li { margin-bottom: 0.55rem; color: var(--ink-soft); }
.help-list strong { color: var(--ink); }

.chart-box { position: relative; height: 280px; margin-top: 0.5rem; }
.chart-box.tall { height: 320px; }

.quick-links {
  display: flex; flex-wrap: wrap; gap: 0.55rem; margin-top: 0.5rem;
}
.quick-links a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
  background: #fff;
}
.quick-links a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.empty {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

footer.site {
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.78rem;
  padding: 1.5rem 0 2rem;
}

@media (max-width: 640px) {
  .stat .value { font-size: 1.2rem; }
  .nav { gap: 0.6rem; }
}