:root {
  --bg: #f0f2f5;
  --card: #ffffff;
  --accent: #0e9f78;
  --accent-dark: #0b7d5f;
  --text: #050505;
  --muted: #65676b;
  --border: #ced0d4;
  --panel: #e4e6e9;
  --danger: #fa383e;
  --income: #0e9f78;
  --expense: #fa383e;
  --topbar-height: 56px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding-top: var(--topbar-height);
}
body:has(.auth-page) { padding-top: 0; }

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

.topbar {
  display: flex; align-items: center; gap: 1.5rem;
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 0 1.25rem; height: var(--topbar-height);
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}
.brand { display: flex; align-items: center; gap: 0.5rem; font-weight: 800; color: var(--accent); flex: none; }
.brand-mark { width: 34px; height: 34px; border-radius: 50%; }
.brand-text { font-size: 1.2rem; }
@media (max-width: 560px) { .brand-text { display: none; } }

.topbar-nav { display: flex; gap: 0.25rem; flex: 1; }
.topbar-nav a {
  display: flex; align-items: center; padding: 0 0.9rem; height: var(--topbar-height);
  color: var(--muted); font-weight: 600; font-size: 0.92rem; border-bottom: 3px solid transparent;
}
.topbar-nav a:hover { text-decoration: none; color: var(--text); }
.topbar-nav a.active { color: var(--accent); border-bottom-color: var(--accent); }
@media (max-width: 560px) { .topbar-nav a span { display: none; } }

.topbar-right { display: flex; align-items: center; gap: 0.6rem; }
.topbar-user { color: var(--text); font-weight: 600; font-size: 0.9rem; }
.topbar-icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%; background: var(--panel);
  font-size: 1.1rem; border: none; cursor: pointer;
}
.topbar-icon-btn:hover { background: #d8dadd; }

.flash-message {
  max-width: 640px; margin: 0.75rem auto 0; padding: 0.6rem 1rem;
  background: #e3f6ef; border: 1px solid rgba(14, 159, 120, 0.3);
  border-radius: 8px; color: var(--text); font-size: 0.9rem;
  transition: opacity 1s ease, max-height 0.5s ease 0.6s, margin 0.5s ease 0.6s, padding 0.5s ease 0.6s;
  max-height: 200px; overflow: hidden;
}
.flash-message.flash-fade { opacity: 0; max-height: 0; margin-top: 0; padding-top: 0; padding-bottom: 0; border-width: 0; }

.page { max-width: 720px; margin: 1.5rem auto; padding: 0 1rem; }

.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg); }
.auth-card { background: var(--card); border-radius: 8px; padding: 2rem; width: 100%; max-width: 360px; box-shadow: 0 4px 16px rgba(0,0,0,0.08); }
.auth-logo { display: block; width: 56px; height: 56px; margin: 0 auto 0.75rem; }
.auth-card h1 { margin: 0 0 0.25rem; text-align: center; color: var(--accent); }
.tagline { color: var(--muted); margin-top: 0; margin-bottom: 1.5rem; text-align: center; }
.switch { margin-top: 1rem; text-align: center; color: var(--muted); }
.auth-credit { margin-top: 0.5rem; text-align: center; color: var(--muted); font-size: 0.78rem; }

.card {
  background: var(--card); border-radius: 8px; padding: 1.25rem;
  margin-bottom: 1rem; box-shadow: 0 1px 2px rgba(0,0,0,0.1), 0 1px 3px rgba(0,0,0,0.08);
  border: 1px solid var(--border);
}
.card h1 { margin-top: 0; }
.card h2 { margin-top: 0; font-size: 1.05rem; }

form label { display: block; margin-bottom: 1rem; font-size: 0.9rem; color: var(--muted); }
form input, form select, form textarea {
  display: block; width: 100%; margin-top: 0.35rem; padding: 0.55rem;
  border: 1px solid var(--border); border-radius: 8px; font-size: 1rem; font-family: inherit; color: var(--text);
}
form input[type=color] { padding: 0.2rem; height: 40px; }
form button {
  background: var(--accent); color: white; border: none; border-radius: 8px;
  padding: 0.6rem 1.2rem; font-size: 1rem; cursor: pointer;
}
form button:hover { background: var(--accent-dark); }
.error { color: #b23b3b; }
.meta { color: var(--muted); margin: 0.2rem 0; font-size: 0.9rem; }
.empty { text-align: center; color: var(--muted); }

.link-button {
  background: none; border: none; color: var(--accent);
  padding: 0; font-size: inherit; font-weight: inherit; cursor: pointer; text-decoration: none;
}
.link-button:hover { text-decoration: underline; }
.danger-link { color: #b23b3b; }

.inline-form { display: flex; gap: 0.5rem; align-items: center; margin-top: 0.5rem; flex-wrap: wrap; }
.inline-form input, .inline-form select { width: auto; margin: 0; flex: 1; min-width: 100px; }
.inline-form button { padding: 0.4rem 0.8rem; font-size: 0.9rem; }

.month-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; gap: 0.5rem; flex-wrap: wrap; }
.month-nav h1 { margin: 0; font-size: 1.3rem; text-align: center; flex: 1; }
.month-nav-btn {
  padding: 0.4rem 0.8rem; border: 1px solid var(--border); border-radius: 8px;
  background: var(--card); font-size: 0.85rem; white-space: nowrap;
}
.month-nav-btn:hover { background: var(--panel); text-decoration: none; }

.summary-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; margin-bottom: 1rem; }
.summary-card { display: flex; flex-direction: column; gap: 0.3rem; text-align: center; }
.summary-label { color: var(--muted); font-size: 0.85rem; }
.summary-value { font-size: 1.3rem; font-weight: 700; }
.summary-card.income .summary-value { color: var(--income); }
.summary-card.expense .summary-value { color: var(--expense); }
.summary-card.positive .summary-value { color: var(--income); }
.summary-card.negative .summary-value { color: var(--expense); }
@media (max-width: 500px) { .summary-row { grid-template-columns: 1fr; } }

.txn-form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 0.75rem; }

.cat-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; flex: none; }

.budget-list { display: flex; flex-direction: column; gap: 0.9rem; }
.compare-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 0.75rem; }
.compare-column {
  border: 1px solid var(--border); border-radius: 8px; padding: 0.9rem;
  display: flex; flex-direction: column; gap: 0.5rem;
}
.compare-column h3 { margin: 0 0 0.2rem; font-size: 1rem; text-align: center; }
.compare-stat { display: flex; justify-content: space-between; align-items: baseline; font-size: 0.88rem; }
.compare-stat.essential-ratio { margin-top: 0.4rem; color: var(--muted); }
.stacked-bar { height: 8px; background: var(--panel); border-radius: 999px; overflow: hidden; }
.stacked-bar-essential { height: 100%; background: var(--accent); border-radius: 999px; }
.income-share {
  margin-top: 0.6rem; padding: 0.5rem 0.6rem; border-radius: 8px; background: var(--panel);
  font-size: 0.82rem; text-align: center; display: flex; flex-direction: column; gap: 0.15rem;
}
.income-share strong { font-size: 1.15rem; }
.income-share.highest { background: #fdecec; }
.income-share.highest strong { color: var(--danger); }
.income-share-badge {
  display: inline-block; margin-top: 0.1rem; padding: 0.1rem 0.5rem; border-radius: 999px;
  background: var(--danger); color: #fff; font-size: 0.7rem; font-weight: 700; align-self: center;
}
.compare-stat-label { color: var(--muted); }
.compare-stat-value { font-weight: 700; font-size: 1.05rem; }
.compare-stat-value.income { color: var(--income); }
.compare-stat-value.expense { color: var(--expense); }
@media (max-width: 500px) { .compare-columns { grid-template-columns: 1fr; } }
.settlement-note { background: var(--panel); border-radius: 8px; padding: 0.7rem 0.9rem; font-size: 0.92rem; margin: 0; }
.budget-item-header { display: flex; justify-content: space-between; font-size: 0.9rem; margin-bottom: 0.3rem; }
.budget-bar { height: 8px; background: var(--panel); border-radius: 999px; overflow: hidden; }
.budget-bar-fill { height: 100%; border-radius: 999px; }
.budget-bar-fill.over { background: var(--danger); }
.over-budget { color: var(--danger); font-weight: 700; }
.budget-warning { color: var(--danger); font-size: 0.82rem; margin: 0.3rem 0 0; }

.chart-bars { display: flex; flex-direction: column; gap: 0.6rem; }
.chart-bar-row { display: grid; grid-template-columns: 110px 1fr 90px; align-items: center; gap: 0.6rem; font-size: 0.85rem; }
.chart-bar-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chart-bar-track { height: 14px; background: var(--panel); border-radius: 999px; overflow: hidden; }
.chart-bar-fill { height: 100%; }
.chart-bar-value { text-align: right; }

.txn-list { display: flex; flex-direction: column; gap: 0.5rem; }
.txn-item {
  display: flex; align-items: center; gap: 0.7rem; padding: 0.6rem 0.4rem;
  border-bottom: 1px solid var(--border);
}
.txn-item:last-child { border-bottom: none; }
.txn-item.inactive { opacity: 0.55; }
.txn-info { flex: 1; min-width: 0; }
.txn-note { color: var(--muted); font-weight: 400; }
.txn-amount { font-weight: 700; white-space: nowrap; }
.txn-amount.income { color: var(--income); }
.txn-amount.expense { color: var(--expense); }

.checkbox-label { display: flex; align-items: center; gap: 0.4rem; font-size: 0.88rem; width: auto; flex: none; }
.checkbox-label input { width: auto; margin: 0; }

.essentials-card { display: flex; flex-direction: column; gap: 0.5rem; }
.essentials-row { display: flex; justify-content: space-between; align-items: baseline; font-size: 0.92rem; }
.essentials-row strong { font-size: 1.05rem; }
.essentials-remaining { border-top: 1px solid var(--border); padding-top: 0.6rem; margin-top: 0.3rem; font-size: 0.95rem; }
.essentials-per-user { border-top: 1px dashed var(--border); padding-top: 0.5rem; margin-top: 0.3rem; display: flex; flex-direction: column; gap: 0.3rem; }
.essentials-per-user .essentials-row { font-size: 0.85rem; color: var(--muted); }
.essentials-remaining.negative strong { color: var(--danger); }
.essentials-remaining.positive strong { color: var(--income); }

.category-list { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 1.25rem; }
.category-item { border: 1px solid var(--border); border-radius: 8px; padding: 0.5rem 0.8rem; }
.category-item summary { cursor: pointer; font-size: 0.92rem; }
.category-item[open] summary { margin-bottom: 0.5rem; }

.site-footer { border-top: 1px solid var(--border); background: var(--card); padding: 1rem 0; margin-top: 2rem; color: var(--muted); font-size: 0.84rem; }
.footer-inner { width: min(720px, calc(100% - 2rem)); margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.8rem; }
.footer-links { display: flex; gap: 1.1rem; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--text); }