* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

:root {
  --primary-color: #4a6cf7;
  --secondary-color: #6c757d;
  --dark-color: #2c3e50;
  --light-color: #f8f9fa;
  --success-color: #28a745;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

body {
  color: #333;
  line-height: 1.6;
  background-color: #f9f9f9;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background-color: white;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
}

.logo i {
  font-size: 2rem;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  text-decoration: none;
  color: var(--dark-color);
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--primary-color);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--dark-color);
}

/* Hero Section */
.hero {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(135deg, #f5f7ff 0%, #e3e9ff 100%);
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 20px;
  color: var(--dark-color);
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 40px;
  color: var(--secondary-color);
}

.download-section {
  max-width: 700px;
  margin: 0 auto 40px;
}

.download-input-container {
  display: flex;
  box-shadow: var(--shadow);
  border-radius: var(--border-radius);
  overflow: hidden;
  margin-bottom: 15px;
}

.download-input {
  flex: 1;
  padding: 18px 20px;
  border: none;
  font-size: 1rem;
  outline: none;
}

.input-buttons {
  display: flex;
  background-color: white;
  border-left: 1px solid #eee;
}

.input-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  background: none;
  border: none;
  color: var(--secondary-color);
  cursor: pointer;
  transition: var(--transition);
  margin: 0 2px;
  border-radius: 4px;
}

.input-btn:hover {
  background-color: #f5f5f5;
  color: var(--primary-color);
}

.paste-btn {
  color: var(--primary-color);
  background-color: rgba(74, 108, 247, 0.05);
  border: 1px solid rgba(74, 108, 247, 0.2);
}

.paste-btn:hover {
  background-color: rgba(74, 108, 247, 0.15);
  color: var(--primary-color);
}

.clear-btn {
  color: var(--danger-color);
  background-color: rgba(220, 53, 69, 0.05);
  border: 1px solid rgba(220, 53, 69, 0.2);
}

.clear-btn:hover {
  background-color: rgba(220, 53, 69, 0.15);
  color: var(--danger-color);
}

.download-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 18px 30px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  width: 100%;
  border-radius: var(--border-radius);
}

.download-btn:hover {
  background-color: #3a5ce5;
}

.download-btn:disabled {
  background-color: #a0b3ff;
  cursor: not-allowed;
}

.platform-icons {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 30px;
}

.platform-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.platform-icon i {
  font-size: 2.5rem;
  color: var(--primary-color);
}

/* Features Section */
.features {
  padding: 80px 0;
  background-color: white;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2.2rem;
  color: var(--dark-color);
  margin-bottom: 15px;
}

.section-title p {
  color: var(--secondary-color);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.feature-card {
  background-color: var(--light-color);
  padding: 30px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-10px);
}

.feature-card i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--dark-color);
}

/* How It Works */
.how-it-works {
  padding: 80px 0;
  background-color: #f5f7ff;
}

.steps {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 50px;
}

.step {
  flex: 1;
  min-width: 250px;
  text-align: center;
  padding: 30px 20px;
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
}

/* Supported Content */
.supported-content {
  padding: 80px 0;
  background-color: white;
}

.content-types {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 25px;
  margin-top: 40px;
}

.content-type {
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: var(--light-color);
  padding: 25px;
  border-radius: var(--border-radius);
  min-width: 150px;
  box-shadow: var(--shadow);
}

.content-type i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 15px;
}

/* FAQ Section */
.faq {
  padding: 80px 0;
  background-color: #f5f7ff;
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 15px;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.faq-question {
  padding: 20px;
  background-color: var(--light-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
}

.faq-question i {
  transition: var(--transition);
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: var(--transition);
  background-color: white;
}

.faq-answer.active {
  padding: 20px;
  max-height: 300px;
}

.faq-question.active i {
  transform: rotate(180deg);
}

/* Footer */
footer {
  background-color: var(--dark-color);
  color: white;
  padding: 60px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-column h3 {
  font-size: 1.3rem;
  margin-bottom: 20px;
  color: white;
}

.footer-column p {
  margin-bottom: 15px;
  color: #bbb;
}

.social-links {
  display: flex;
  gap: 15px;
  margin-top: 20px;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
  border-radius: 50%;
  text-decoration: none;
  transition: var(--transition);
}

.social-links a:hover {
  background-color: var(--primary-color);
  transform: translateY(-5px);
}

.copyright {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #e2e2e2;
  /* font-size: 0.9rem; */
}

/* Toast Notification */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 15px 25px;
  background-color: rgba(40, 167, 69, 0.1);
  border: 1px solid rgba(40, 167, 69, 0.2);
  color: var(--success-color);
  border-radius: var(--border-radius);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateX(150%);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 1001;
  font-weight: 500;
  backdrop-filter: blur(10px);
}

.toast i {
  font-size: 1.2rem;
}

.toast.show {
  transform: translateX(0);
}

.toast.error {
  background-color: rgba(220, 53, 69, 0.1);
  border-color: rgba(220, 53, 69, 0.2);
  color: var(--danger-color);
}

/* Error Banner */
.error-banner {
  background-color: rgba(220, 53, 69, 0.1) !important;
  color: var(--danger-color) !important;
  border: 1px solid rgba(220, 53, 69, 0.2);
  padding: 15px;
  text-align: center;
  margin-bottom: 20px;
  border-radius: var(--border-radius);
  font-weight: 500;
}

/* Responsive Styles */
@media (max-width: 992px) {
  .hero h1 {
    font-size: 2.3rem;
  }

  .platform-icons {
    flex-wrap: wrap;
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: white;
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow);
    text-align: center;
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .download-input-container {
    flex-direction: column;
  }

  .input-buttons {
    border-left: none;
    border-top: 1px solid #eee;
    justify-content: space-between;
    padding: 10px;
    gap: 10px;
  }

  .input-btn {
    width: auto;
    flex: 1;
    padding: 12px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.05);
  }

  .steps {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 60px 0;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .features,
  .how-it-works,
  .faq,
  .supported-content {
    padding: 60px 0;
  }

  .feature-card {
    padding: 20px;
  }

  .content-type {
    min-width: 120px;
    padding: 20px 15px;
  }
}

/* Loading Spinner */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  background-color: var(--primary-color);
  color: white;
  padding: 18px 30px;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  width: 100%;
}

.fa-spin {
  animation: fa-spin 2s infinite linear;
}

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