:root {
  --bg-color: #f0f2f5;
  --text-color: #333;
  --container-bg: #fff;
  --button-bg: #4CAF50;
  --button-hover: #45a049;
  --shadow-color: rgba(0,0,0,0.1);
  --button-shadow: rgba(0,0,0,0.2);
}

[data-theme='dark'] {
  --bg-color: #1a1a1a;
  --text-color: #f0f0f0;
  --container-bg: #2d2d2d;
  --button-bg: #388E3C;
  --button-hover: #2E7D32;
  --shadow-color: rgba(0,0,0,0.4);
  --button-shadow: rgba(0,0,0,0.5);
}

body {
  font-family: 'Arial', sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background-color: var(--bg-color);
  margin: 0;
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1 {
  color: var(--text-color);
  margin-bottom: 30px;
  font-size: 2.5em;
  text-shadow: 1px 1px 3px var(--shadow-color);
}

.theme-toggle-container {
  position: absolute;
  top: 20px;
  right: 20px;
}

#theme-toggle {
  padding: 8px 15px;
  border-radius: 20px;
  border: 1px solid var(--text-color);
  background: var(--container-bg);
  color: var(--text-color);
  cursor: pointer;
  font-weight: bold;
  transition: all 0.3s ease;
}

.lotto-numbers-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  margin-bottom: 30px;
  padding: 20px;
  background-color: var(--container-bg);
  border-radius: 15px;
  box-shadow: 0 4px 15px var(--shadow-color);
  min-width: 300px;
  max-width: 600px;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.lotto-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  font-size: 1.3em;
  font-weight: bold;
  color: white;
  box-shadow: inset 0 -3px 5px rgba(0,0,0,0.2), 0 4px 8px rgba(0,0,0,0.2);
  transition: transform 0.3s ease;
}

.lotto-number:hover {
  transform: scale(1.1);
}

#draw-button {
  padding: 12px 25px;
  font-size: 1.1em;
  font-weight: bold;
  color: white;
  background-color: var(--button-bg);
  border: none;
  border-radius: 25px;
  cursor: pointer;
  box-shadow: 0 4px 10px var(--button-shadow);
  transition: background-color 0.3s ease, transform 0.3s ease;
}

#draw-button:hover {
  background-color: var(--button-hover);
  transform: translateY(-2px);
}

.main-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 600px;
  padding: 20px;
}

.contact-section {
  margin-top: 50px;
  width: 100%;
}

.contact-section hr {
  border: 0;
  border-top: 1px solid var(--shadow-color);
  margin-bottom: 30px;
}

.contact-section h3 {
  text-align: center;
  margin-bottom: 20px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 15px;
  background-color: var(--container-bg);
  padding: 25px;
  border-radius: 15px;
  box-shadow: 0 4px 15px var(--shadow-color);
  transition: background-color 0.3s ease;
}

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

.form-group label {
  font-weight: bold;
  font-size: 0.9em;
}

.form-group input, 
.form-group textarea {
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--shadow-color);
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: inherit;
  transition: border-color 0.3s ease;
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.form-group input:focus, 
.form-group textarea:focus {
  outline: none;
  border-color: var(--button-bg);
}

.submit-button {
  margin-top: 10px;
  padding: 12px;
  border-radius: 8px;
  border: none;
  background-color: var(--button-bg);
  color: white;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.submit-button:hover {
  background-color: var(--button-hover);
  transform: translateY(-2px);
}