:root {
  --bg-color: #000000;
  --text-color: #ffffff;
  --accent-color: #ec3750;
  --secondary-color: #ff8c37;
  --font-family: "Inter", sans-serif;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-family);
  overflow: hidden;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

#app {
  width: 100%;
  height: 100%;
  max-width: 600px;
  position: relative;
}

.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
  box-sizing: border-box;
  text-align: center;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.screen.active {
  display: flex;
  opacity: 1;
}

h1 {
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 1rem;
  background: linear-gradient(
    45deg,
    var(--secondary-color),
    var(--accent-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

p {
  font-size: 1.2rem;
  line-height: 1.6;
  color: #ccc;
}

input {
  padding: 15px;
  font-size: 1.2rem;
  border-radius: 8px;
  border: 2px solid #333;
  background: #111;
  color: white;
  margin-bottom: 20px;
  width: 80%;
  max-width: 300px;
  text-align: center;
}

button {
  padding: 15px 30px;
  font-size: 1.2rem;
  border-radius: 30px;
  border: none;
  background: linear-gradient(
    45deg,
    var(--secondary-color),
    var(--accent-color)
  );
  color: white;
  cursor: pointer;
  font-weight: bold;
  transition: transform 0.2s;
}

button:hover {
  transform: scale(1.05);
}

.loader {
  border: 5px solid #333;
  border-top: 5px solid var(--accent-color);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
  margin-bottom: 20px;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.progress-bar {
  width: 80%;
  height: 10px;
  background: #333;
  border-radius: 5px;
  margin-top: 20px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--secondary-color),
    var(--accent-color)
  );
  width: 0%;
  transition: width 0.3s ease;
}

.slide {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stat-big {
  font-size: 4rem;
  font-weight: 900;
  color: var(--accent-color);
  margin: 20px 0;
}

.stat-label {
  font-size: 1.5rem;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.list-item {
  font-size: 1.5rem;
  margin: 10px 0;
  display: flex;
  justify-content: space-between;
  width: 100%;
  max-width: 400px;
  border-bottom: 1px solid #333;
  padding-bottom: 5px;
}

.list-rank {
  color: var(--secondary-color);
  font-weight: bold;
  margin-right: 15px;
}

.list-val {
  font-weight: bold;
}

.controls {
  position: absolute;
  bottom: 20px;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  box-sizing: border-box;
}

.controls button {
  background: rgba(255, 255, 255, 0.1);
  padding: 10px 20px;
  font-size: 1.5rem;
}

.slide-total-hours .stat-big {
  background: linear-gradient(45deg, #ff00cc, #3333ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.slide-os .stat-big {
  color: #4caf50;
}

.slide-lang .stat-big {
  color: #ffeb3b;
}

#app-footer {
  font-size: 0.8rem;
  color: #888;
  text-align: center;
}

#app-footer a {
  color: #888;
  text-decoration: none;
  font-weight: bold;
}

#app-footer a:hover {
  text-decoration: underline;
  color: var(--accent-color);
}

.contribution-graph-container {
  width: 100%;
  overflow-x: auto;
  display: flex;
  justify-content: center;
  padding: 20px 0;
  -webkit-overflow-scrolling: touch;
}

.contribution-graph {
  display: grid;
  grid-template-rows: repeat(7, 15px);
  grid-auto-flow: column;
  gap: 3px;
}

.day {
  width: 15px;
  height: 15px;
  border-radius: 2px;
}

.day.empty {
  background: transparent;
}

@media (max-width: 768px) {
  .stat-big {
    font-size: 3rem;
  }

  .contribution-graph-container {
    justify-content: flex-start;
    padding: 20px 0;
  }

  .contribution-graph {
    gap: 2px;
    grid-template-rows: repeat(7, 10px);
    margin: 0 auto;
  }

  .day {
    width: 10px;
    height: 10px;
    border-radius: 1px;
  }
}

@media (max-width: 480px) {
  .stat-big {
    font-size: 2rem;
  }

  .stat-label {
    font-size: 1rem;
  }

  .list-item {
    font-size: 1rem;
    max-width: 100%;
  }

  .contribution-graph {
    gap: 1px;
    grid-template-rows: repeat(7, 4px);
  }

  .day {
    width: 4px;
    height: 4px;
    border-radius: 0.5px;
  }
}