:root {
  color-scheme: light;
  --background: #eef2f6;
  --panel: #ffffff;
  --ink: #171b24;
  --muted: #657080;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --line: #d9e0e8;
  --shadow: 0 20px 55px rgba(26, 37, 52, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.14), transparent 34%),
    linear-gradient(315deg, rgba(187, 132, 43, 0.16), transparent 36%),
    var(--background);
}

button,
input {
  font: inherit;
}

.timer-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 18px;
}

.timer-panel {
  width: min(100%, 620px);
  padding: clamp(28px, 7vw, 52px);
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 26px;
  font-size: clamp(2rem, 7vw, 4.25rem);
  line-height: 1;
}

.time-display {
  min-height: 1.2em;
  margin: 0 auto 24px;
  font-size: clamp(3rem, 14vw, 6.75rem);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  overflow-wrap: anywhere;
}

.time-form {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  text-align: left;
}

input {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f9fbfd;
}

.preset-group {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 22px;
}

.preset-button {
  min-height: 40px;
  padding: 8px 10px;
  font-size: 0.88rem;
}

.alarm-options {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 auto 24px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f9fbfd;
  text-align: left;
}

.alarm-options legend {
  padding: 0 8px;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 800;
  text-transform: uppercase;
}

.alarm-choice {
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
}

.alarm-choice:hover {
  border-color: rgba(15, 118, 110, 0.45);
  background: #eef7f5;
}

.alarm-choice:has(input:checked) {
  color: var(--accent-dark);
  border-color: var(--accent);
  background: rgba(15, 118, 110, 0.1);
}

.alarm-choice input {
  width: 18px;
  min-height: 18px;
  margin: 0;
  accent-color: var(--accent);
}

.controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 34px;
}

button,
.switch-link {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

button {
  color: var(--ink);
  border: 1px solid var(--line);
  background: #f7f9fb;
}

button:hover {
  background: #eef4f8;
}

button.primary,
.switch-link {
  color: #ffffff;
  border: 1px solid var(--accent);
  background: var(--accent);
}

button.primary:hover,
.switch-link:hover {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
}

.switch-link {
  width: min(100%, 220px);
}

@media (max-width: 420px) {
  .controls {
    grid-template-columns: 1fr;
  }

  .time-form,
  .preset-group,
  .alarm-options {
    grid-template-columns: 1fr;
  }

  .alarm-choice {
    grid-template-columns: auto 1fr;
  }
}