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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #333;
  overflow: hidden;
}

/* Login page styles */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.login-box {
  background: white;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  max-width: 450px;
  width: 100%;
  text-align: center;
}

.login-box h1 {
  color: #333;
  margin-bottom: 10px;
  font-size: 2.5em;
}

.subtitle {
  color: #666;
  margin-bottom: 30px;
  font-size: 1.1em;
}

.form-group {
  margin-bottom: 20px;
}

.form-group input {
  width: 100%;
  padding: 15px;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
}

.btn-primary {
  width: 100%;
  padding: 15px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  padding: 12px 24px;
  background: #6c757d;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.3s;
}

.btn-secondary:hover {
  background: #5a6268;
}

.btn-small {
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.3s;
}

.btn-small:hover {
  background: rgba(255, 255, 255, 0.3);
}

.instructions {
  margin-top: 30px;
  text-align: left;
  background: #f8f9fa;
  padding: 20px;
  border-radius: 8px;
}

.instructions h3 {
  color: #333;
  margin-bottom: 15px;
  font-size: 1.2em;
}

.instructions ul {
  list-style: none;
}

.instructions li {
  padding: 8px 0;
  color: #555;
  font-size: 0.95em;
}

.instructions strong {
  color: #667eea;
  font-weight: 600;
}

/* Loading overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  z-index: 10000;
  color: white;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 5px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 20px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Modal styles */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.modal-content {
  background: white;
  border-radius: 12px;
  padding: 40px;
  max-width: 500px;
  width: 90%;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.modal-content h2 {
  color: #333;
  margin-bottom: 15px;
  font-size: 2em;
}

.modal-content p {
  color: #666;
  margin-bottom: 25px;
  font-size: 1.1em;
}

.modal-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.modal-buttons button {
  flex: 1;
  min-width: 120px;
}

/* Overlay (pause) */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 9998;
}

.overlay-content {
  text-align: center;
  color: white;
}

.overlay-content h2 {
  font-size: 3em;
  margin-bottom: 20px;
}

.overlay-content p {
  font-size: 1.5em;
  opacity: 0.8;
}