:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #101828;
  background: #e8eef7;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px;
}

button {
  font: inherit;
}

.timer {
  width: min(100%, 760px);
  overflow: hidden;
  background: #ffffff;
  border: 1px solid #c9d4e5;
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(30, 58, 95, 0.14);
}

header,
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 28px;
}

header {
  border-bottom: 1px solid #dbe3ef;
}

.brand,
.sessions {
  margin: 0;
}

.brand {
  font-size: 1.05rem;
  font-weight: 750;
}

.sessions {
  color: #475467;
  font-size: 0.9rem;
}

.sessions strong {
  color: #175cd3;
}

.clock {
  padding: 56px 64px 48px;
}

.modes {
  display: inline-flex;
  gap: 6px;
  padding: 5px;
  background: #eef3fb;
  border-radius: 12px;
}

.mode {
  padding: 9px 14px;
  color: #475467;
  background: transparent;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}

.mode.active {
  color: #ffffff;
  background: #175cd3;
}

h1 {
  margin: 32px 0 8px;
  max-width: 12ch;
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

time {
  display: block;
  margin: 20px 0 18px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(4.5rem, 16vw, 8.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.07em;
  font-variant-numeric: tabular-nums;
}

progress {
  width: 100%;
  height: 8px;
  overflow: hidden;
  appearance: none;
  border: 0;
  border-radius: 99px;
  background: #e5eaf2;
}

progress::-webkit-progress-bar {
  background: #e5eaf2;
}

progress::-webkit-progress-value {
  background: #175cd3;
}

progress::-moz-progress-bar {
  background: #175cd3;
}

.controls {
  display: flex;
  gap: 12px;
  margin-top: 36px;
}

.controls button {
  min-height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  cursor: pointer;
}

.primary {
  color: #101828;
  background: #fdb022;
  border: 1px solid #dc8d00;
  font-weight: 750;
}

.secondary {
  color: #344054;
  background: #ffffff;
  border: 1px solid #98a2b3;
}

button:hover {
  filter: brightness(0.96);
}

button:focus-visible {
  outline: 3px solid #84adff;
  outline-offset: 3px;
}

.status {
  min-height: 1.5em;
  margin: 22px 0 0;
  color: #475467;
}

footer {
  color: #667085;
  background: #f8fafc;
  border-top: 1px solid #dbe3ef;
  font-size: 0.8rem;
}

@media (max-width: 600px) {
  body {
    padding: 12px;
  }

  header,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .clock {
    padding: 40px 24px 36px;
  }

  .controls {
    flex-direction: column;
  }

  .controls button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: no-preference) {
  progress::-webkit-progress-value {
    transition: width 0.35s ease-out;
  }
}