:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #202020;
  background: #fff;
  font-synthesis: none;
  --muted: #737373;
  --line: #e7e7e7;
  --mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; }
button, input, select { font: inherit; }
button, input, select, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled { cursor: default; opacity: .35; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid #555; outline-offset: 4px; }
.shell { max-width: 1000px; margin: auto; padding: 0 40px; }
.header { height: 86px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
h1 { margin: 0; font-size: 20px; font-weight: 600; letter-spacing: -.6px; }
.brand { color: inherit; text-decoration: none; }
.date { font-size: 12px; color: var(--muted); }
h2 { margin: 0; font-size: 13px; font-weight: 500; }
.panel-top, .history-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.timer-panel { padding: 27px 0 24px; }
.status { font-size: 12px; color: var(--muted); }
.status.running { color: #202020; }
.timer-center { display: flex; flex-direction: column; align-items: center; padding: 38px 0 23px; }
.session-title { width: min(100%, 500px); min-width: 0; padding: 8px 4px; border: 0; border-bottom: 1px solid transparent; border-radius: 0; background: transparent; color: #202020; font-size: 23px; font-weight: 400; text-align: center; text-overflow: ellipsis; }
.session-title::placeholder { color: #929292; font-size: 19px; }
.session-title:hover { border-bottom-color: var(--line); }
.session-title:focus { border-bottom-color: #8a8a8a; outline: none; }
.session-title:focus-visible { box-shadow: 0 1px 0 #555; }
.timer { margin: 17px 0 29px; font: 400 88px/1.2 var(--mono); letter-spacing: -4px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.timer span { color: #999; }
.timer-actions { display: flex; justify-content: center; gap: 10px; }
.primary, .secondary { min-width: 94px; height: 38px; padding: 0 18px; border: 1px solid #d5d5d5; border-radius: 5px; font-size: 12px; font-weight: 500; }
.primary { background: #202020; border-color: #202020; color: #fff; }
.primary:hover { background: #383838; }
.secondary { background: #fff; color: #333; }
.secondary:not(:disabled):hover { background: #f5f5f5; }
.timer-note { margin: 0; text-align: center; font-size: 11px; line-height: 1.6; color: var(--muted); }
.sound-panel { display: grid; grid-template-columns: 1fr minmax(180px, 290px) auto; align-items: center; gap: 26px; padding: 24px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sound-source { display: flex; align-items: center; gap: 18px; }
#noise-type { max-width: 120px; padding: 7px 24px 7px 10px; border: 1px solid #d5d5d5; border-radius: 5px; background: #fff; color: #333; font-size: 12px; cursor: pointer; }
.volume-control { display: flex; align-items: center; gap: 13px; min-width: 0; font-size: 11px; color: var(--muted); }
.volume-control label { flex-shrink: 0; }
.volume-control output { min-width: 30px; text-align: right; font-variant-numeric: tabular-nums; }
input[type=range] { display: block; width: 100%; min-width: 0; height: 18px; margin: 0; accent-color: #333; cursor: pointer; }
.sound-toggle { min-width: 70px; }
.sound-note { grid-column: 1 / -1; margin: -12px 0 0; font-size: 12px; color: var(--muted); }
.sound-note:empty { display: none; }
.history-panel { padding: 30px 0; border-bottom: 1px solid var(--line); }
.week-nav { display: flex; align-items: center; gap: 10px; font-size: 11px; color: var(--muted); }
.week-nav button { border: 0; background: transparent; color: #333; border-radius: 3px; width: 28px; height: 28px; font-size: 16px; }
.week-nav button:not(:disabled):hover { background: #f3f3f3; }
.week-nav span { min-width: 110px; text-align: center; }
.history-content { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 45px; margin-top: 28px; }
.today-total { border-right: 1px solid var(--line); padding-right: 28px; }
.today-total > p { font-size: 12px; color: var(--muted); margin: 0 0 6px; }
.hours { display: flex; align-items: baseline; gap: 7px; }
.hours strong { font-size: 36px; font-weight: 400; letter-spacing: -1px; font-variant-numeric: tabular-nums; }
.hours span { color: var(--muted); font-size: 14px; }
.week-total { display: flex; flex-direction: column; gap: 7px; margin-top: 20px; font-size: 11px; }
.week-total span { color: var(--muted); }
.week-total strong { font-weight: 500; font-variant-numeric: tabular-nums; }
.chart-wrap { min-width: 0; }
.chart { display: flex; gap: 14px; justify-content: space-around; height: 157px; background: repeating-linear-gradient(to top, transparent 0, transparent 37px, #f0f0f0 38px, transparent 39px); background-size: 100% 118px; background-repeat: no-repeat; }
.chart-day { height: 100%; flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; min-width: 0; }
.chart-value { font-size: 10px; color: var(--muted); margin-bottom: 7px; white-space: nowrap; font-variant-numeric: tabular-nums; }
.chart-bar { background: #d4d4d4; width: min(30px, 80%); min-height: 3px; border-radius: 2px 2px 0 0; }
.chart-day.today .chart-bar { background: #333; }
.chart-label { font-size: 10px; color: var(--muted); margin-top: 12px; height: 14px; white-space: nowrap; }
.chart-day.today .chart-label { color: #202020; font-weight: 600; }
.storage-warning { border: 1px solid #888; color: #333; font-size: 12px; line-height: 1.5; padding: 14px; border-radius: 5px; }
footer { padding: 22px 0 30px; color: var(--muted); font-size: 11px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
@media (max-width: 650px) {
  .shell { padding: 0 22px; }
  .header { height: 72px; }
  .date { font-size: 11px; }
  .timer-panel { padding-top: 23px; }
  .timer-center { padding: 31px 0 23px; }
  .session-title { font-size: 22px; }
  .session-title::placeholder { font-size: 17px; }
  .timer { font-size: clamp(44px, 11.7vw, 72px); letter-spacing: -2px; margin: 18px 0 28px; }
  .timer-note { font-size: 10px; }
  .sound-panel { grid-template-columns: 1fr auto; gap: 16px; padding: 20px 0; }
  .volume-control { grid-row: 2; grid-column: 1 / -1; gap: 14px; }
  .sound-toggle { grid-column: 2; grid-row: 1; height: 33px; }
  .sound-note { margin: 0; }
  .history-panel { padding: 24px 0; }
  .history-content { grid-template-columns: 1fr; gap: 26px; margin-top: 22px; }
  .today-total { display: grid; grid-template-columns: 1fr 1fr; align-items: end; border-right: 0; padding: 0; }
  .today-total > p { grid-column: 1; }
  .hours { grid-column: 1; }
  .week-total { grid-column: 2; grid-row: 1 / 3; text-align: right; margin: 0 0 5px; gap: 8px; }
  .week-nav { gap: 4px; }
  .week-nav span { min-width: 100px; }
  .chart { gap: 8px; }
}