style.css

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

body {
  font-family: "Arial", sans-serif;
  background: linear-gradient(135deg, #1e3c72, #2a5298);
  min-height: 100vh;
  padding: 20px;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  padding: 30px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

h1 {
  text-align: center;
  color: white;
  margin-bottom: 30px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  font-size: 2.5em;
}

.controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.input-group label {
  color: white;
  font-weight: bold;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.input-group input {
  padding: 10px;
  border: 2px solid #fff;
  border-radius: 8px;
  font-size: 16px;
  text-align: center;
  width: 100px;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-primary {
  background: #e74c3c;
  color: white;
  box-shadow: 0 4px 15px rgba(231, 76, 60, 0.5);
  font-weight: bold;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
  background: #c0392b;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(192, 57, 43, 0.7);
}

.btn-secondary {
  background: #27ae60;
  color: white;
  box-shadow: 0 4px 15px rgba(39, 174, 96, 0.5);
  font-weight: bold;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.btn-secondary:hover:not(:disabled) {
  background: #1e8449;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 132, 73, 0.7);
}

.btn-info {
  background: #3498db;
  color: white;
  box-shadow: 0 4px 15px rgba(52, 152, 219, 0.5);
  font-weight: bold;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.btn-info:hover {
  background: #2980b9;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(41, 128, 185, 0.7);
}

.btn:disabled {
  background: #ccc;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.card-area {
  margin-bottom: 30px;
}

.card-container {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 120px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  margin-bottom: 20px;
}

.card {
  width: 100px;
  height: 140px;
  background: white;
  border: 2px solid #333;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  font-size: 22px;
  font-weight: bold;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.card.comparing {
  background: #fff3cd;
  border-color: #ffc107;
  transform: scale(1.05);
}

.card.selected {
  background: #d4edda;
  border-color: #28a745;
  transform: scale(1.05);
}

.card.sorted {
  background: #e2f3ff;
  border-color: #007bff;
}

.card .value {
  font-size: 20px;
  font-weight: bold;
}

.card .suit {
  font-size: 32px;
  margin: 8px 0;
}

.card .value-bottom {
  font-size: 20px;
  font-weight: bold;
  transform: rotate(180deg);
}

.red {
  color: #dc3545;
}

.black {
  color: #000;
}

.log-section {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 20px;
}

.log-section h3 {
  color: white;
  margin-bottom: 15px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.sorting-log {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 8px;
  padding: 15px;
  max-height: 400px;
  overflow-y: auto;
}

.log-step {
  margin-bottom: 15px;
  padding: 10px;
  background: #f8f9fa;
  border-radius: 6px;
  border-left: 4px solid #007bff;
}

.log-step h4 {
  color: #007bff;
  margin-bottom: 10px;
  font-size: 14px;
}

.log-cards {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}

.log-card {
  width: 40px;
  height: 55px;
  background: white;
  border: 1px solid #333;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-size: 10px;
  font-weight: bold;
}

.log-card.comparing {
  background: #fff3cd;
  border-color: #ffc107;
}

.log-card.selected {
  background: #d4edda;
  border-color: #28a745;
}

.log-card.sorted {
  background: #e2f3ff;
  border-color: #007bff;
}

/* Modal styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
  background-color: #fefefe;
  margin: 5% auto;
  padding: 30px;
  border: none;
  border-radius: 15px;
  width: 80%;
  max-width: 600px;
  position: relative;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
  position: absolute;
  top: 15px;
  right: 25px;
  cursor: pointer;
}

.close:hover,
.close:focus {
  color: #000;
  text-decoration: none;
}

.algorithm-explanation {
  line-height: 1.6;
  color: #333;
}

.algorithm-explanation h2 {
  color: #2c3e50;
  margin-bottom: 20px;
}

.algorithm-explanation ol {
  margin: 15px 0;
  padding-left: 20px;
}

.algorithm-explanation li {
  margin: 10px 0;
}

.algorithm-explanation ul {
  margin: 15px 0;
  padding-left: 20px;
}

.indicator {
  display: inline-block;
  width: 20px;
  height: 20px;
  border-radius: 3px;
  margin-right: 8px;
  border: 2px solid #333;
}

.indicator.selected {
  background-color: #d4edda;
  border-color: #28a745;
}

.indicator.comparing {
  background-color: #fff3cd;
  border-color: #ffc107;
}

.indicator.sorted {
  background-color: #e2f3ff;
  border-color: #007bff;
}

@media (max-width: 768px) {
  .container {
    padding: 15px;
  }

  h1 {
    font-size: 2em;
  }

  .controls {
    flex-direction: column;
    gap: 15px;
  }

  .card {
    width: 80px;
    height: 110px;
    font-size: 16px;
  }

  .card .suit {
    font-size: 24px;
  }

  .log-card {
    width: 30px;
    height: 42px;
    font-size: 8px;
  }

  .modal-content {
    width: 95%;
    margin: 10% auto;
    padding: 20px;
  }
}