:root {
  --card-width: 300px;
  --card-height: 400px;
  --approve-color: #28a745;
  --deny-color: #dc3545;
  --background-start: #021a13;
  --background-end: #1f4529;
  --text-color: #ecf0f1;
  --card-background: #2c3e50;
  --card-shadow: rgba(0, 0, 0, 0.2);
  --card-shadow-hover: rgba(0, 0, 0, 0.3);
}

body {
  font-family: "Inter", sans-serif;
  background: linear-gradient(
    var(--background-start) 0%,
    var(--background-end) 100%
  );
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  touch-action: none;
}

header {
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
}

.subtitle {
  font-size: 1.1rem;
  opacity: 0.8;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
}

#score {
  font-size: 1.2rem;
  font-weight: 600;
}

.card-container {
  position: relative;
  width: var(--card-width);
  height: var(--card-height);
  margin: 0 auto;
}

.card {
  position: absolute;
  width: 100%;
  height: 100%;
  background: var(--card-background);
  border-radius: 15px;
  box-shadow: 0 10px 20px var(--card-shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  will-change: transform;
  border: 4px solid transparent;
}

.card.dragging {
  cursor: grabbing;
  box-shadow: 0 15px 30px var(--card-shadow-hover);
}

.card.approve {
  transform: translateX(150px) rotate(15deg) !important;
  border-color: var(--approve-color);
}

.card.deny {
  transform: translateX(-150px) rotate(-15deg) !important;
  border-color: var(--deny-color);
}

.card-content {
  text-align: center;
  padding: 20px;
  color: var(--text-color);
}

.card-content h2 {
  margin-top: 0;
  font-size: 1.5rem;
}

.card-content ul {
  list-style: none;
  padding: 0;
  font-size: 1.1rem;
  text-align: left;
}

.card-content li {
  margin-bottom: 0.5rem;
}

.swipe-actions {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}

.approve-label,
.deny-label {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1000;
  color: #fff;
}

.approve-label {
  right: 20px;
}

.deny-label {
  left: 20px;
}

#feedback {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  padding: 1rem 2rem;
  border-radius: 2rem;
  font-size: 1.5rem;
  font-weight: bold;
  color: white;
  opacity: 0;
  transition: all 0.3s ease-in-out;
  z-index: 2000;
  pointer-events: none;
}

#feedback.show {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

#feedback.correct {
  background-color: var(--approve-color);
}

#feedback.incorrect {
  background-color: var(--deny-color);
}

footer {
  margin-top: 2rem;
}

.btn {
  color: #fff;
  text-decoration: none;
  padding: 0.8rem 1.7rem;
  border: none;
  background: #3a552f;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1.05rem;
  transition: transform 0.18s, background 0.18s;
}

.btn:hover {
  transform: translateY(-2px) scale(1.04);
  background: #4f7740;
}

.hidden {
  display: none;
}