@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700&display=swap');

:root {
  /* ProPresenter authentic brand colors */
  --primary-bg: #1a1a1a;
  --secondary-bg: #2a2a2a;
  --card-bg: #333333;
  --accent-orange: #FF6B35;
  --accent-purple: #6B46C1;
  --accent-orange-hover: #E55A2B;
  --accent-purple-hover: #553C9A;
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-muted: #888888;
  --border-color: #404040;
  --border-radius: 8px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 6px 30px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
  min-height: calc(100vh - 80px);
}

.header {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem 0;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.header .subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto;
}

.main-content {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.card h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card h2::before {
  content: '';
  width: 4px;
  height: 20px;
  background: var(--accent-orange);
  border-radius: 2px;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

input[type="text"], textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"]:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

input[type="text"]::placeholder, textarea::placeholder {
  color: var(--text-muted);
}

textarea {
  min-height: 300px;
  resize: vertical;
  font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  line-height: 1.5;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-orange);
}

.checkbox-group label {
  margin: 0;
  font-weight: 500;
  text-transform: none;
  letter-spacing: normal;
  color: var(--text-primary);
}

.convert-btn {
  width: 100%;
  padding: 16px 24px;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-purple));
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: 'Montserrat', sans-serif;
}

.convert-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 107, 53, 0.3);
}

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

.diagnostics {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1rem;
  font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  font-size: 0.9rem;
  white-space: pre-wrap;
  color: var(--text-secondary);
  min-height: 100px;
  max-height: 300px;
  overflow-y: auto;
}

.info-section {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(107, 70, 193, 0.1));
  border: 1px solid rgba(255, 107, 53, 0.2);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.info-section h3 {
  color: var(--accent-orange);
  margin-bottom: 1rem;
  font-size: 1.2rem;
  font-weight: 600;
}

.info-section p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  text-align: center;
  margin-top: 3rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.footer p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-orange);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.github-link:hover {
  color: var(--accent-purple);
}

.github-icon {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.feature-item {
  background: rgba(255, 107, 53, 0.05);
  border: 1px solid rgba(255, 107, 53, 0.1);
  border-radius: var(--border-radius);
  padding: 1rem;
}

.feature-item h4 {
  color: var(--accent-orange);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.feature-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}