:root {
  color-scheme: dark;
  --background: #1c1221;
  --panel: rgba(17, 10, 20, 0.54);
  --text: #f5f1f7;
  --muted: #b7aeba;
  --track: #030303;
  --track-line: rgba(255, 255, 255, 0.07);
  --border: #bcb9c1;
  --fill: #f4f2f0;
  --accent: #66d9ef;
  --accent-dark: #1d90a8;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 10%, rgba(96, 59, 112, 0.18), transparent 32rem),
    var(--background);
}

button,
input {
  font: inherit;
}

.timer-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: clamp(0.75rem, 2vw, 1.5rem);
}

.timer-card {
  width: 92vw;
  padding: 0;
  text-align: center;
}

.progress-frame {
  width: 100%;
  height: 15vw;
  position: relative;
  overflow: hidden;
  border: 0.125rem solid var(--border);
  border-radius: 0.28rem;
  background:
    repeating-linear-gradient(
      135deg,
      var(--track-line) 0,
      var(--track-line) 0.34rem,
      transparent 0.34rem,
      transparent 0.88rem
    ),
    var(--track);
  box-shadow:
    inset 0 0 0 0.125rem rgba(255, 255, 255, 0.07),
    0 1rem 2rem rgba(0, 0, 0, 0.26);
}

.progress-fill {
  width: 0%;
  height: 100%;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.8), transparent 70%),
    var(--fill);
  box-shadow:
    inset 0.15rem 0 0 rgba(0, 0, 0, 0.15),
    0.35rem 0 1rem rgba(244, 242, 240, 0.16);
  transition: width 180ms linear;
}

.timer-status {
  min-height: 1.5rem;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-weight: 700;
}

.controls {
  display: flex;
  align-items: end;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.duration-control {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  border: 0;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
  text-align: left;
}

.duration-control legend {
  padding: 0;
}

.duration-control span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.duration-control input {
  width: 5.25rem;
  border: 0.125rem solid rgba(255, 255, 255, 0.22);
  border-radius: 0.6rem;
  padding: 0.65rem 0.75rem;
  color: var(--text);
  background: rgba(0, 0, 0, 0.32);
  outline: none;
}

.duration-control input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.18rem rgba(102, 217, 239, 0.18);
}

.button-row {
  display: flex;
  gap: 0.75rem;
}

.control-button {
  min-width: 6rem;
  border: 0.125rem solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  padding: 0.72rem 1.1rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition:
    transform 140ms ease,
    border-color 140ms ease,
    background-color 140ms ease;
}

.control-button:hover {
  transform: translateY(-0.08rem);
  border-color: rgba(255, 255, 255, 0.46);
}

.control-button:focus-visible {
  outline: 0.18rem solid var(--accent);
  outline-offset: 0.18rem;
}

.control-button.primary {
  color: #061014;
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent), var(--accent-dark));
  font-weight: 800;
}

@media (max-width: 42rem) {
  .timer-card {
    padding-inline: 1rem;
  }

  .controls,
  .button-row {
    width: 100%;
  }

  .duration-control,
  .button-row,
  .control-button {
    flex: 1;
  }
}