:root {
  --color-bg: #f5f6f4;
  --color-surface: #ffffff;
  --color-text: #1c1f1e;
  --color-muted: #6b7370;
  --color-primary: #1d6f5c;
  --color-primary-text: #ffffff;
  --color-error: #b3261e;
  --color-success: #1d6f3c;
  --color-border: #dcdfdd;
  --radius: 12px;
  --spacing: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14181a;
    --color-surface: #1e2426;
    --color-text: #e9edea;
    --color-muted: #9aa3a0;
    --color-border: #333b3d;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  max-width: 100%;
  overflow-x: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  row-gap: 8px;
  padding: 12px var(--spacing);
  background: var(--color-primary);
  color: var(--color-primary-text);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-user { font-weight: 600; }

.topbar-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: center;
}

.topbar-nav a, .topbar-nav .link-button {
  color: var(--color-primary-text);
  text-decoration: none;
  font-size: 15px;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
}

.inline-form { display: inline; }

.content {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--spacing);
  padding-bottom: 96px;
}

.centered-form {
  max-width: 360px;
  margin: 15vh auto 0;
  padding: var(--spacing);
}

h1 { font-size: 24px; margin-bottom: 12px; }

form { display: flex; flex-direction: column; gap: 4px; }

label {
  font-size: 14px;
  color: var(--color-muted);
  margin-top: 12px;
}

input, select, textarea {
  font-size: 17px;
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  width: 100%;
}

button {
  margin-top: 20px;
  padding: 14px;
  font-size: 17px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  background: var(--color-primary);
  color: var(--color-primary-text);
  cursor: pointer;
  min-height: 48px;
}

button:active { opacity: 0.85; }

.error {
  color: var(--color-error);
  background: color-mix(in srgb, var(--color-error) 12%, transparent);
  padding: 10px 12px;
  border-radius: var(--radius);
}

.success {
  color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 12%, transparent);
  padding: 10px 12px;
  border-radius: var(--radius);
}

.list-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.list-header h1 { margin: 0; }

.button-primary {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-primary-text);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-weight: 600;
  white-space: nowrap;
}

.expense-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.expense-row {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 14px;
}

.expense-row.not-shared { opacity: 0.7; }

.expense-main {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  font-size: 18px;
  font-weight: 600;
}

.expense-amount { white-space: nowrap; }

.expense-desc {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.expense-meta {
  color: var(--color-muted);
  font-size: 14px;
  margin-top: 4px;
}

.badge {
  display: inline-block;
  background: var(--color-border);
  border-radius: 999px;
  padding: 1px 8px;
  font-size: 12px;
}

.expense-actions {
  display: flex;
  gap: 16px;
  margin-top: 8px;
  font-size: 14px;
}

.expense-actions a, .expense-actions .link-button {
  color: var(--color-primary);
  text-decoration: none;
  background: none;
  border: none;
  padding: 0;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
}

.expense-actions .danger { color: var(--color-error); }

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 15px;
  color: var(--color-text);
  cursor: pointer;
  flex: 1 1 auto;
  justify-content: center;
}

.radio-option input { width: auto; }

.checkbox-option {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  font-size: 15px;
  color: var(--color-text);
}

.checkbox-option input { width: auto; }

.split-sub {
  border-top: 1px solid var(--color-border);
  margin-top: 16px;
  padding-top: 8px;
}

.hint {
  color: var(--color-muted);
  font-size: 13px;
  margin: 4px 0 0;
}

.filter-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 16px;
}

.search-input { margin-top: 0; }

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.pill-link {
  display: inline-block;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--color-text);
  text-decoration: none;
  background: var(--color-bg);
}

.pill-link-reset { color: var(--color-muted); }

.filter-row {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.filter-row > div { flex: 1 1 0; }

.toggle-section {
  margin-top: 8px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.toggle-section input { width: auto; flex: 1 1 auto; margin-top: 0; }
.toggle-section label { margin-top: 0; }

h2 {
  font-size: 18px;
  margin: 24px 0 8px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-label {
  font-size: 13px;
  color: var(--color-muted);
}

.stat-value {
  font-size: 20px;
  font-weight: 700;
}

.stat-sub {
  font-size: 12px;
  color: var(--color-muted);
}

.compare-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
}

.trend-up { color: var(--color-error); font-weight: 600; }
.trend-down { color: var(--color-success); font-weight: 600; }

.category-breakdown {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.category-row-label {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  margin-bottom: 4px;
}

.category-bar-track {
  background: var(--color-border);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}

.category-bar-fill {
  background: var(--color-primary);
  height: 100%;
  border-radius: 999px;
}

.history-chart {
  width: 100%;
  height: auto;
  margin-top: 8px;
}

.chart-bar { fill: var(--color-primary); }

.chart-label {
  font-size: 7px;
  fill: var(--color-muted);
}

.balance-headline {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  margin-bottom: 8px;
}

.balance-amount {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-error);
}

.balance-amount.balance-settled {
  color: var(--color-success);
  font-size: 24px;
}

.balance-text {
  color: var(--color-muted);
  font-size: 15px;
}

.filter-buttons {
  display: flex;
  justify-content: flex-end;
  margin-top: 10px;
}

.button-secondary {
  margin-top: 0;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  min-height: auto;
}