@import url("https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Montserrat", sans-serif;
  background: linear-gradient(
      rgba(140, 210, 220, 0.7),
      rgba(200, 240, 250, 0.6)
    ),
    url("./img/Salar-de-Uyuni-Bolivia-Dry-salt-flats-Travelwithmk.com_.jpg")
      center/cover fixed;
  min-height: 100vh;
  color: #333;
}

.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding: 0 10px;
}

h1 {
  font-size: 2.8rem;
  font-weight: 500;
  color: #2c5f6d;
  letter-spacing: 1px;
}

.subtitle {
  font-size: 1.4rem;
  font-weight: 300;
  color: #4a8a9a;
}

.sound-btn {
  background: rgba(255, 255, 255, 0.4);
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  font-size: 1.4rem;
  color: #2c5f6d;
  cursor: pointer;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.sound-btn:hover {
  transform: scale(1.1);
  background: rgba(255, 255, 255, 0.7);
}

.sound-btn.muted i::before {
  content: "\f6a9";
}

main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Lobby */
ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  padding: 20px;
  max-width: 1000px;
}

li {
  background: rgba(255, 255, 255, 0.55);
  border-radius: 16px;
  padding: 20px 15px;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 10px;
}

li:hover {
  transform: translateY(-8px);
}

.card-header {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

input[type="number"] {
  width: 60px;
  padding: 8px;
  font-size: 1.6rem;
  text-align: center;
  background: transparent;
  border: 2px solid #8abdc9;
  border-radius: 8px;
  color: #2c5f6d;
}

input[type="number"]::-webkit-inner-spin-button {
  opacity: 0.6;
}

li span {
  font-size: 1.4rem;
  color: #4a8a9a;
}

li img {
  max-height: 140px;
  max-width: 140px;
  object-fit: contain;
  justify-self: center;
}

.controls {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.controls i {
  font-size: 1.8rem;
  color: #6a9ca8;
  padding: 10px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.6);
  transition: all 0.2s;
}

.controls i:hover {
  background: white;
  transform: scale(1.15);
}

#reboot {
  font-size: 1.2rem;
  color: #6a9ca8;
}

/* Routine */
.exercice-container {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(15px);
  border-radius: 24px;
  padding: 40px 30px;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  max-width: 600px;
  width: 90%;
  animation: fadeIn 0.8s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.exercice-container p {
  font-size: 6rem;
  font-weight: 600;
  letter-spacing: 8px;
  color: #2c5f6d;
  margin: 20px 0;
}

.exercice-container img {
  max-height: 300px;
  max-width: 300px;
  margin: 20px 0;
  border-radius: 16px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.progress {
  font-size: 1.8rem;
  color: #4a8a9a;
  margin-top: 30px;
}

/* Buttons */
.btn-container {
  text-align: center;
  padding: 30px 0;
}

button:not(.sound-btn) {
  background: rgba(255, 255, 255, 0.7);
  border: none;
  padding: 16px 32px;
  font-size: 1.6rem;
  border-radius: 50px;
  cursor: pointer;
  backdrop-filter: blur(10px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  color: #2c5f6d;
  font-weight: 500;
}

button:hover:not(.sound-btn) {
  background: white;
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

button i {
  margin-left: 10px;
  font-size: 1.3rem;
}

.btn-reboot {
  background: rgba(220, 100, 100, 0.2);
  color: #a04444;
  margin-top: 20px;
}

/* Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 2.2rem;
  }
  .subtitle {
    font-size: 1.2rem;
  }
  .exercice-container p {
    font-size: 4.5rem;
  }
  ul {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  ul {
    grid-template-columns: 1fr;
  }
  .exercice-container img {
    max-height: 220px;
  }
}