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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  overflow: hidden;
}

header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  padding: 30px;
  text-align: center;
}

header h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.subtitle {
  opacity: 0.9;
  font-size: 1rem;
}

main {
  padding: 30px;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #333;
}

textarea {
  width: 100%;
  padding: 15px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  font-size: 14px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  resize: vertical;
  transition: border-color 0.3s;
}

textarea:focus {
  outline: none;
  border-color: #667eea;
}

select {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  font-size: 14px;
  background: #fff;
  cursor: pointer;
  transition: border-color 0.3s;
}

select:focus {
  outline: none;
  border-color: #667eea;
}

.btn-primary {
  width: 100%;
  padding: 15px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  display: inline-block;
  padding: 12px 24px;
  background: #f5f5f5;
  color: #333;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 500;
  transition: background 0.2s;
}

.btn-secondary:hover {
  background: #e0e0e0;
}

.result {
  margin-top: 25px;
  padding: 20px;
  background: #f0fdf4;
  border-radius: 10px;
  border: 1px solid #86efac;
}

.success-text {
  color: #16a34a;
  font-weight: 600;
  margin-bottom: 15px;
}

.url-box {
  display: flex;
  gap: 10px;
}

.url-box input {
  flex: 1;
  padding: 12px;
  border: 2px solid #86efac;
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
}

.btn-copy {
  padding: 12px 20px;
  background: #16a34a;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-copy:hover {
  background: #15803d;
}

.expire-info {
  margin-top: 12px;
  font-size: 13px;
  color: #666;
}

.error {
  margin-top: 20px;
  padding: 15px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 10px;
  color: #dc2626;
}

.hidden {
  display: none !important;
}

/* View page styles */
.loading {
  text-align: center;
  padding: 40px;
  color: #666;
}

.content-area {
  /* visible */
}

.meta-info {
  display: flex;
  gap: 20px;
  margin-bottom: 15px;
  font-size: 13px;
  color: #666;
}

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

.actions .btn-primary {
  flex: 1;
}

.not-found {
  text-align: center;
  padding: 60px 20px;
}

.error-text {
  color: #dc2626;
  font-size: 18px;
  margin-bottom: 20px;
}

footer {
  text-align: center;
  padding: 20px;
  background: #f9fafb;
  color: #666;
  font-size: 13px;
}

/* Responsive */
@media (max-width: 600px) {
  body {
    padding: 10px;
  }

  header {
    padding: 20px;
  }

  header h1 {
    font-size: 1.5rem;
  }

  main {
    padding: 20px;
  }

  .url-box {
    flex-direction: column;
  }

  .actions {
    flex-direction: column;
  }
}