:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --border: #dcdcdc;
  --accent: #2f6f4f;
  --accent-contrast: #ffffff;
  --danger: #a4322a;
  --card-bg: #f7f7f5;
  --radius: 6px;
  font-size: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --fg: #e8e8e6;
    --muted: #9a9a97;
    --border: #33363b;
    --accent: #5fae86;
    --accent-contrast: #0d130f;
    --danger: #e08a83;
    --card-bg: #1e2126;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 4rem;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.site-header .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  text-decoration: none;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--muted);
}

h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 0.75rem; }

a { color: var(--accent); }

.page-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

th, td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border);
}

th { color: var(--muted); font-weight: 600; font-size: 0.9rem; }

.row-actions a { margin-right: 0.75rem; font-size: 0.9rem; }

.days-note { color: var(--muted); font-size: 0.8rem; margin-top: 0.15rem; }

.hint { color: var(--muted); font-weight: 400; font-size: 0.8rem; margin: 0; }

.empty { color: var(--muted); font-style: italic; }

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0 0 1.5rem;
  padding: 0;
}

.stat-row > div {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  min-width: 9rem;
}

.stat-row dt {
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 0.25rem;
}

.stat-row dd {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.balance-at {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.balance-at form {
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  max-width: 28rem;
}

.entry-form {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  max-width: 24rem;
}

.entry-form form,
form.entry-form { max-width: none; }

label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.9rem;
  color: var(--muted);
}

input {
  font: inherit;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--fg);
}

input[type="checkbox"] {
  width: auto;
  padding: 0;
  border: none;
  background: none;
}

.checkbox-label {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  color: var(--fg);
}

/* Progressive disclosure: the "Through" date only appears once "Multiple
   days" is checked, so the form reads as a single date by default. */
.multi-day-fields {
  display: none;
  flex-direction: column;
  gap: 0.4rem;
}

.entry-form:has(.multi-day-toggle:checked) .multi-day-fields {
  display: flex;
}

/* "Hours" by default; becomes "Hours per day" once a range is in play. */
.label-plural { display: none; }

.entry-form:has(.multi-day-toggle:checked) .label-singular { display: none; }
.entry-form:has(.multi-day-toggle:checked) .label-plural { display: inline; }

button, .button, .button-danger {
  font: inherit;
  padding: 0.55rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-contrast);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  width: fit-content;
}

button:hover, .button:hover { filter: brightness(1.08); }

.button-danger {
  border-color: var(--danger);
  background: transparent;
  color: var(--danger);
}

.link-button {
  background: none;
  border: none;
  color: var(--muted);
  text-decoration: underline;
  padding: 0;
  cursor: pointer;
  width: auto;
}

.danger-zone { margin-top: 2rem; }

.error {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  border: 1px solid var(--danger);
  border-radius: var(--radius);
  padding: 0.6rem 0.8rem;
  max-width: 28rem;
}

.auth-card, .form-card {
  max-width: 24rem;
  margin: 2rem auto;
}