/* Layout: sticky summary bar (range, rate inputs + results) over a responsive grid of month blocks, weeks Mon–Sun */
:root {
  color-scheme: light dark;

  --bg: #f6f7f8;
  --surface: #ffffff;
  --fg: #1c2127;
  --muted: #6b7480;
  --line: #dde1e6;
  --accent: #2f5bd3;
  --accent-fg: #ffffff;
  --weekend: #eef0f3;
  --holiday: #c2410c;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Monaco, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171b;
    --surface: #1c2025;
    --fg: #e6e9ed;
    --muted: #8b95a1;
    --line: #2c323a;
    --accent: #6b8ff0;
    --accent-fg: #0d1117;
    --weekend: #181b20;
    --holiday: #fb923c;
  }
}

*, *::before, *::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-padding-top: env(safe-area-inset-top, 0px);
}

body {
  margin: 0;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  font: 14px/1.4 var(--font-body);
  background: var(--bg);
  color: var(--fg);
}

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px 32px;
}

header {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 12px;
  padding-block: 16px;
  margin-bottom: 24px;
}

/* the summary bar is too tall to pin on a phone */
@media (min-width: 640px) {
  header {
    position: sticky;
    top: env(safe-area-inset-top, 0px);
    z-index: 2;
  }
}

.top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px 24px;
}

h1 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;

  & span {
    display: block;
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--muted);
  }
}

.legend {
  display: flex;
  gap: 16px;
  font-size: 0.75rem;
  color: var(--muted);
  align-items: center;

  & i {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    margin-right: 4px;
    vertical-align: -1px;
  }

  & .l-sel { background: var(--accent); }
  & .l-hol { border: 2px solid var(--holiday); }
}

.panel {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: flex-end;
}

.field {
  display: grid;
  gap: 4px;
}

.field label,
.stat small {
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}

.date,
.money {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  color: var(--fg);
}

.date {
  font: inherit;
  font-family: var(--font-mono);
  font-size: 1rem; /* 16px+ stops iOS Safari zooming on focus */
  padding: 5px 8px;

  &:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
}

.money {
  display: flex;
  align-items: center;

  & span {
    padding-left: 8px;
    color: var(--muted);
    font-family: var(--font-mono);
  }

  & input {
    font: inherit;
    font-family: var(--font-mono);
    font-size: 1rem;
    font-variant-numeric: tabular-nums;
    border: 0;
    background: transparent;
    color: var(--fg);
    padding: 6px 8px;
    width: 9rem;

    &:focus { outline: none; }
  }

  &:focus-within { outline: 2px solid var(--accent); outline-offset: 1px; }
}

.check {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  padding-bottom: 6px;
  cursor: pointer;

  & input {
    accent-color: var(--accent);
    width: 1.1rem;
    height: 1.1rem;
    margin: 0;
  }
}

.stat {
  display: grid;
  gap: 2px;

  & output {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
  }

  &.key output {
    font-size: 1.75rem;
    color: var(--accent);
  }
}

.btn {
  font: inherit;
  font-size: 0.8rem;
  background: none;
  color: var(--muted);
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 10px 14px;
  cursor: pointer;
  touch-action: manipulation;

  @media (hover: hover) {
    &:hover { color: var(--fg); border-color: var(--muted); }
  }

  @media (min-width: 640px) {
    padding: 4px 10px;
  }
}

.months {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.month {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;

  & h2 {
    display: flex;
    justify-content: space-between;
    margin: 0 0 8px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;

    & span {
      font-family: var(--font-mono);
      color: var(--muted);
      letter-spacing: 0;
      text-transform: none;
      font-weight: 400;
    }
  }
}

.grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
}

.dow {
  font-size: 0.7rem;
  color: var(--muted);
  text-align: center;
  padding-bottom: 4px;
}

.day {
  font: inherit;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  aspect-ratio: 1;
  max-width: 100%;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  padding: 0;
  touch-action: manipulation; /* rapid taps toggle days rather than zoom */
  -webkit-tap-highlight-color: transparent;

  &.we { background: var(--weekend); color: var(--muted); }
  &.hol { border: 2px solid var(--holiday); color: var(--holiday); font-weight: 600; }
  @media (hover: hover) {
    &:hover { border-color: var(--accent); }
  }
  &:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
  &[aria-pressed="true"] { background: var(--accent); color: var(--accent-fg); font-weight: 600; }
  &.today { text-decoration: underline; text-underline-offset: 3px; }
}

.hols {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.72rem;
  color: var(--holiday);
}