@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&display=swap');

:root {
  --background-color-start: #1e1e1e;
  --background-color-end: #121212;
  --text-color: #ffffff;
  --accent-color: #ff4081;
  --container-bg: rgba(0, 0, 0, 0.2);
  --ball-text-color: #ffffff;
  --shadow-color: rgba(0, 0, 0, 0.5);
  --glow-color: rgba(255, 64, 129, 0.7);
  --toggle-bg: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] {
  --background-color-start: #f0f2f5;
  --background-color-end: #ffffff;
  --text-color: #333333;
  --accent-color: #6200ee;
  --container-bg: rgba(255, 255, 255, 0.8);
  --shadow-color: rgba(0, 0, 0, 0.1);
  --glow-color: rgba(98, 0, 238, 0.3);
  --toggle-bg: rgba(0, 0, 0, 0.05);
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(to bottom, var(--background-color-start), var(--background-color-end));
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  text-align: center;
  transition: background 0.3s ease, color 0.3s ease;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4' viewBox='0 0 4 4'%3E%3Cpath fill='%239C92AC' fill-opacity='0.1' d='M1 3h1v1H1V3zm2-2h1v1H3V1z'%3E%3C/path%3E%3C/svg%3E");
}

.app-container {
  padding: 2rem;
  border-radius: 15px;
  background: var(--container-bg);
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 30px var(--shadow-color);
  width: 90%;
  max-width: 600px;
  position: relative;
}

header {
  position: relative;
  margin-bottom: 2rem;
}

h1 {
  font-size: 2.2rem;
  margin: 0;
  color: var(--accent-color);
}

#theme-toggle {
  position: absolute;
  top: -10px;
  right: -10px;
  background: var(--toggle-bg);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.2rem;
  transition: transform 0.2s ease, background 0.3s ease;
}

#theme-toggle:hover {
  transform: scale(1.1);
}

.numbers-display {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 2rem;
  min-height: 400px;
}

.set-row {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

#generate-btn {
  padding: 1rem 2rem;
  font-size: 1.2rem;
  font-weight: bold;
  color: #ffffff;
  background-color: var(--accent-color);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 0 15px var(--glow-color);
}

#generate-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 25px var(--glow-color), 0 0 40px var(--accent-color);
}

.contact-section {
  margin-top: 3rem;
  text-align: left;
}

.separator {
  border: none;
  border-top: 1px solid var(--toggle-bg);
  margin-bottom: 2rem;
}

.contact-section h2 {
  font-size: 1.5rem;
  color: var(--accent-color);
  margin-bottom: 1.5rem;
  text-align: center;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem;
  border-radius: 8px;
  border: 1px solid var(--toggle-bg);
  background: var(--toggle-bg);
  color: var(--text-color);
  font-family: inherit;
  font-size: 1rem;
  box-sizing: border-box;
  transition: border-color 0.3s ease;
}

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

#form-submit-btn {
  width: 100%;
  padding: 0.8rem;
  border-radius: 8px;
  border: none;
  background-color: var(--toggle-bg);
  color: var(--text-color);
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

#form-submit-btn:hover {
  background-color: var(--accent-color);
  color: #ffffff;
}

#form-status {
  margin-top: 1rem;
  text-align: center;
  font-size: 0.9rem;
}

#form-status.success {
  color: #4caf50;
}

#form-status.error {
  color: #f44336;
}