:root {
  --primary-color: #ff0000;
  --secondary-color: #282828;
  --text-color: #333;
  --light-gray: #f5f5f5;
  --medium-gray: #e0e0e0;
  --dark-gray: #666;
  --white: #fff;
  --success-color: #4CAF50;
  --font-main: 'Roboto', sans-serif;
}

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

body {
  font-family: var(--font-main);
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--light-gray);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  background-color: var(--secondary-color);
  color: var(--white);
  padding: 20px 0;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

header .logo {
  color: var(--primary-color);
  font-weight: bold;
}

.youtube-red {
  color: var(--primary-color);
}

.main-content {
  background-color: var(--white);
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 30px;
  margin: 30px 0;
}

.generator-form {
  margin-bottom: 30px;
}

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

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

input[type="text"],
textarea,
select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--medium-gray);
  border-radius: 4px;
  font-size: 16px;
  transition: border 0.3s;
}

input[type="text"]:focus,
textarea:focus,
select:focus {
  border-color: var(--primary-color);
  outline: none;
}

.range-container {
  display: flex;
  align-items: center;
}

.range-slider {
  flex: 1;
  margin-right: 15px;
}

.range-value {
  width: 50px;
  text-align: center;
  font-weight: bold;
}

input[type="range"] {
  width: 100%;
  height: 8px;
  border-radius: 5px;
  background: var(--medium-gray);
  outline: none;
  -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
}

.btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 500;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s;
}

.btn:hover {
  background-color: #e50000;
  transform: translateY(-2px);
}

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

.results-container {
  display: none;
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid var(--medium-gray);
}

.results-container.active {
  display: block;
}

.hashtag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.hashtag {
  background-color: var(--light-gray);
  padding: 8px 15px;
  border-radius: 30px;
  font-size: 14px;
  display: flex;
  align-items: center;
  transition: background-color 0.3s;
}

.hashtag:hover {
  background-color: var(--medium-gray);
}

.hashtag-text {
  margin-right: 8px;
}

.copy-btn {
  background: none;
  border: none;
  color: var(--dark-gray);
  cursor: pointer;
  font-size: 14px;
  transition: color 0.3s;
}

.copy-btn:hover {
  color: var(--primary-color);
}

.copy-all-btn {
  margin-top: 20px;
  background-color: var(--secondary-color);
}

.copy-all-btn:hover {
  background-color: #1a1a1a;
}

.categories {
  margin-top: 30px;
}

.category {
  margin-bottom: 20px;
}

.category-title {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 10px;
  color: var(--secondary-color);
}

.info-section {
  margin-top: 50px;
}

.info-section h2 {
  font-size: 24px;
  margin-bottom: 20px;
  color: var(--secondary-color);
}

.info-section h3 {
  font-size: 20px;
  margin: 25px 0 15px;
  color: var(--secondary-color);
}

.info-section p {
  margin-bottom: 15px;
}

.info-section ul {
  margin-left: 20px;
  margin-bottom: 20px;
}

.info-section li {
  margin-bottom: 8px;
}

.tips-container {
  background-color: var(--light-gray);
  border-left: 4px solid var(--primary-color);
  padding: 20px;
  margin: 20px 0;
  border-radius: 0 4px 4px 0;
}

.tips-container h3 {
  margin-top: 0;
}

footer {
  background-color: var(--secondary-color);
  color: var(--white);
  text-align: center;
  padding: 20px 0;
  margin-top: 50px;
}

.loading {
  display: none;
  text-align: center;
  margin: 20px 0;
}

.loading.active {
  display: block;
}

.spinner {
  width: 40px;
  height: 40px;
  margin: 0 auto;
  border: 4px solid rgba(255, 0, 0, 0.2);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.success-message {
  display: none;
  background-color: var(--success-color);
  color: var(--white);
  padding: 10px;
  border-radius: 4px;
  margin-top: 10px;
  text-align: center;
}

.success-message.active {
  display: block;
}

@media (max-width: 768px) {
  .container {
    padding: 15px;
  }
  
  .main-content {
    padding: 20px;
  }
  
  header h1 {
    font-size: 2rem;
  }
}