:root {
  color-scheme: light;
  font-family: "Inter", "Segoe UI", sans-serif;
  background: #f7f7f7;
  --twister-blue: #3b82f6;
  --twister-red: #ef4444;
  --twister-yellow: #facc15;
  --twister-green: #22c55e;
  --ink: #111827;
  --panel: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: linear-gradient(140deg, #f9fafb 0%, #f3f4f6 100%);
  color: var(--ink);
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 1.5rem clamp(1.5rem, 4vw, 4rem) 2.5rem;
}

.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.eyebrow {
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: #6b7280;
  font-size: 0.7rem;
  margin: 0 0 0.5rem;
}

h1 {
  font-size: clamp(2.2rem, 3.6vw, 3.5rem);
  margin: 0 0 0.5rem;
}

.subtitle {
  margin: 0;
  font-size: 1.1rem;
  color: #4b5563;
}

.wheel {
  position: relative;
  width: clamp(180px, 30vw, 280px);
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 22px 40px rgba(15, 23, 42, 0.18);
  display: grid;
  place-items: center;
  transition: transform 1.2s ease-out;
}

.wheel__segment {
  position: absolute;
  inset: 0;
}

.segment--blue {
  background: conic-gradient(
    from 0deg,
    var(--twister-blue) 0deg 90deg,
    transparent 90deg 360deg
  );
}

.segment--yellow {
  background: conic-gradient(
    from 90deg,
    var(--twister-yellow) 0deg 90deg,
    transparent 90deg 360deg
  );
}

.segment--green {
  background: conic-gradient(
    from 180deg,
    var(--twister-green) 0deg 90deg,
    transparent 90deg 360deg
  );
}

.segment--red {
  background: conic-gradient(
    from 270deg,
    var(--twister-red) 0deg 90deg,
    transparent 90deg 360deg
  );
}

.wheel__pointer {
  position: absolute;
  top: -10px;
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-bottom: 18px solid #111827;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.2));
}

.panel {
  background: var(--panel);
  border-radius: 24px;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
  display: grid;
  gap: 2rem;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.25rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  font-weight: 600;
  font-size: 0.95rem;
  color: #374151;
}

input,
select {
  padding: 0.6rem 0.75rem;
  border-radius: 12px;
  border: 1px solid #d1d5db;
  font-size: 1rem;
}

input:focus,
select:focus {
  outline: 2px solid #111827;
  outline-offset: 2px;
}

.toggle {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  background: #f3f4f6;
  padding: 0.65rem 0.9rem;
  border-radius: 12px;
}

.toggle__label {
  margin: 0;
}

.play {
  display: grid;
  gap: 1.25rem;
}

.status {
  padding: 1.2rem 1.4rem;
  border-radius: 18px;
  background: linear-gradient(120deg, #111827 0%, #1f2937 100%);
  color: #f9fafb;
}

.status__label {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin: 0 0 0.4rem;
  opacity: 0.7;
}

.status__instruction {
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 600;
  margin: 0;
}

.status__timer {
  margin: 0.6rem 0 0;
  font-size: 0.95rem;
  opacity: 0.8;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  background: #e5e7eb;
  color: #111827;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover:enabled {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.2);
}

.btn--primary {
  background: linear-gradient(120deg, var(--twister-blue), var(--twister-red));
  color: #fff;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.footer {
  text-align: center;
  color: #6b7280;
  font-size: 0.9rem;
}

@media (max-width: 700px) {
  .hero {
    flex-direction: column;
    align-items: flex-start;
  }

  .wheel {
    align-self: center;
  }

  .buttons {
    flex-direction: column;
  }
}