:root {
  --accent: #2d6cdf;
  --accent-dark: #1d4fa8;
  --bg: #f5f6f8;
  --card: #ffffff;
  --border: #d9dce1;
  --text: #1f2430;
  --muted: #6b7280;
  --alert: #c0392b;
  --ok: #1e8449;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.4;
}

.hidden {
  display: none;
}

#login-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.login-card {
  width: 320px;
}

.login-card form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

input,
select,
textarea {
  font: inherit;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

button {
  font: inherit;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

button.primary:hover {
  background: var(--accent-dark);
}

button.danger {
  color: var(--alert);
  border-color: #e5b9b5;
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

header .title {
  font-weight: 700;
  font-size: 1.1rem;
}

.month-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.month-nav span {
  min-width: 140px;
  text-align: center;
  font-weight: 600;
}

header nav {
  margin-left: auto;
  display: flex;
  gap: 8px;
}

main {
  max-width: 720px;
  margin: 24px auto;
  padding: 0 16px;
}

h2,
h3 {
  margin: 0 0 12px;
}

section.box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}

.error {
  color: var(--alert);
  min-height: 1.2em;
}

.alert {
  color: var(--alert);
  font-weight: 700;
}

.row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.row:last-child {
  border-bottom: none;
}

.row .grow {
  flex: 1;
}

.row .amount {
  font-weight: 600;
  white-space: nowrap;
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

.progressbar {
  position: relative;
  height: 14px;
  background: #e8ebf0;
  border-radius: 7px;
  overflow: hidden;
  margin: 6px 0;
}

.progress {
  height: 100%;
  background: var(--accent);
  border-radius: 7px;
}

.progress.over {
  background: var(--alert);
}

.budget {
  margin-bottom: 16px;
}

.budget h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.budget h3 .actions {
  margin-left: auto;
  display: flex;
  gap: 4px;
}

.summary {
  font-weight: 700;
  cursor: pointer;
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  margin: 0 0 12px;
  display: grid;
  gap: 8px;
}

fieldset label {
  display: grid;
  gap: 4px;
}

.form-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.budget-form {
  margin-bottom: 20px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 8px;
  border-bottom: 1px solid var(--border);
}

td.amount,
th.amount {
  text-align: right;
  white-space: nowrap;
}

.radio-group {
  display: flex;
  gap: 16px;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 4px;
}